HomeMy WebLinkAboutWPO201900053 VSMP - SWPPP 2019-10-25A
COUNTY OF ALBEMARLE
Department of Community Development
n 401 McIntire Road, North Wing
Charlottesville, Virginia 22902-4596
Tel. (434) 296-5832 • Fax (434) 972-4126
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Stormwater Pollution Prevention Plan (SWPPP)
For Construction Activities At:
Project Name: Eco Village
WPO 201900053
Address:
480 Rio Rd East
Charlottesville, VA 22901
TMP 61-210
Prepared by:
Shimp Engineering, P.C.
Prepared for:
Ecovillage Holdings, LLC
SWPPP Preparation Date: 10/25/2019
(This document is to be made publicly available according to 9VAC25-880-70, Part Il, section D)
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
CONTENTS: (from Albemarle County Code Sec. 17-405)
1. Registration statement
2. Notice of general permit coverage
3. Nature of activity
4. Erosion and Sediment Control Plan.
5. Stormwater Management Plan
6. Pollution Prevention Plan.
7. Discharges to impaired waters, surface waters within an applicable TMDL wasteload
allocation, and exceptional waters.
8. Qualified personnel
9. Signed Certification
10. Delegation of authority.
11. General permit copy
12. Inspection logs
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 1. Registration statement
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY FOR OFFICE USE ONLY
GENERAL VPDES PERMIT FOR DISCHARGES OF STORMWATER FROM ID Number:
CONSTRUCTION ACTIVITIES (VAR10) Technical Criteria: IIB ❑ IIC ❑
REGISTRATION STATEMENT 2019
NEW ISSUANCE M
MODIFICATION WITH ACREAGE INCREASE ❑
Existing Permit Coverage Number (if applicable, VAR10####):
Section I. Operator/Permittee Information.
RE -ISSUANCE ❑
MODIFICATION WITHOUT ACREAGE INCREASE ❑
A. Construction Activity Operator (Permittee). The person or entity that is applying for permit coverage and will have
operational control over construction activities to ensure compliance with the general permit. A person with
signatory authority for this operator must sign the certification in Section VI. (per Part III. K. of the VAR10 Permit).
Construction Activity
Operator Name:
ECO VILLAGE HOLDINGS LLC
Contact person:
Dave Redding
Address:
480 Rio Rd East
City, State, Zip Code:
Charlottesville, VA 22901
Phone Number:
434-826-9505
Primary Email:
hfcusa.org@gmail.com
CC Email:
keane@shimp-engineering.com
B. Billing Information
(leave blank if same as the Operator identified in Section I. A. above). This entity will receive
Annual Permit Maintenance
and Permit Modification Fee invoices (if applicable).
Name:
Contact Person:
Address:
City, State Zip Code:
Phone Number:
Primary Email:
CC Email:
C. May we transmit correspondence electronically? You must choose YES and include a valid email in order to pay by
credit card and to receive your permit coverage approval letter via email:
YES 0 NO ❑
Rev 04/2019 PAGE 1 17
CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019
Section II. Construction Activity Location Information. Project site information.
A. Include a site map showing the location of the existing or proposed land -disturbing activities, the limits of land
disturbance, construction entrances and all water bodies receiving stormwater discharges from the site.
B. Construction Activity Name:
Address: 480 Rio Rd East
City and/or County and Zip Code: Charlottesville, VA 22901
Latitude and Longitude
(6-digit, decimal degrees format): 38.048640,-78.465458
C. Construction Activity Entrance Location
(description, street address and/or
latitude/longitude in decimal degrees): 38.048640,-78.465458
Section III. Offsite Support Activity Location Information. List all offsite support activities to be included under this
permit registration. Enter additional areas on a separate page. Offsite areas not included on this registration may need
to obtain coverage under a separate VPDES permit.
A. Offsite Activity Name:
Address:
City and/or County and Zip Code:
Latitude and Longitude
(6-digit, decimal degrees format):
B. Offsite Activity Entrance Location
(description, street address and/or
latitude/longitude in decimal degrees):
Section IV. Site Information.
A. Acreage totals for all land -disturbing activities to be included under this
permit coverage. Report to the nearest one -hundredth of an acre.
Total land area of development (including the entire
area to be disturbed as approved in the Stormwater
6.53 ac
Management Plan):
Primary estimated area to be disturbed (portions with
Erosion and Sediment Control Plan approval only):
5.90 ac
Offsite estimated area to be disturbed (if applicable):
C. Property Owner Status:
B. Estimated Project Dates
(M M/D D/YYYY)
Start date:
01/01/2020
Completion date:
01/01/2021
FEDERAL ❑ STATE ❑ PUBLIC ❑ PRIVATE 0
D. Nature of the Construction Activity Description (i.e.
commercial, industrial, residential, agricultural,
residential
environmental):
E. Municipal Separate Storm Sewer System (MS4)
name (if discharging to a MS4): n/a
Rev 04/2019 PAGE 2 17
CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019
F. Is this construction activity part of a common plan of development or sale? YES ❑ NO ❑
G. 6t" Order Hydrologic Unit Code (HUC) and Receiving Water Name(s). Attach a separate list if needed.
HUC RECEIVING WATERBODY(S)
020802040401 1 Rivanna River - Meadow Creek
Section V. Other Information.
A. A stormwater pollution prevention plan (SWPPP) must be prepared in accordance with the requirements of the
General VPDES Permit for Discharges of Stormwater from Construction Activities prior to submitting the Registration
Statement. By signing the Registration Statement, the operator is certifying that the SWPPP has been prepared.
B. Has an Erosion and Sediment Control Plan been submitted to the VESCP Authority for review? YES 0 NO ❑
Erosion and Sediment Control Plan Approval Date (for estimated area to be disturbed).:
C. Has land disturbance has commenced? YES ❑ NO 0
D. If this project is using approved Annual Standards and Specifications (AS&S), attach the completed AS&S Entity
Form. AS&S Entity Name (if different from the Operator identified in Section II. A.):
SEE THE FOLLOWING PAGE FOR SIGNATURE
AND CERTIFICATION REQUIREMENTS AND INFORMATION
Rev 04/2019 PAGE 3 17
CONSTRUCTION GENERAL PERMIT (VAR10) REGISTRATION STATEMENT 2019
Section VI. Certification. A person representing the operator as identified in Section I. A. and meeting the requirements
of 9VAC25-880-70. Part III. K must physically sign this certification. A typed signature is not acceptable. Please note that
operator is defined in 9VAC25-870-10 as follows:
"Operator" means the owner or operator of any facility or activity subject to the Act and this chapter. In the context of stormwater
associated with a large or small construction activity, operator means any person associated with a construction project that meets
either of the following two criteria: (i) the person has direct operational control over construction plans and specifications, including
the ability to make modifications to those plans and specifications or (ii) the person has day-to-day operational control of those
activities at a project that are necessary to ensure compliance with a stormwater pollution prevention plan for the site or other state
permit or VSMP authority permit conditions (i.e., they are authorized to direct workers at a site to carry out activities required by the
stormwater pollution prevention plan or comply with other permit conditions). In the context of stormwater discharges from
Municipal Separate Storm Sewer Systems (MS4s), operator means the operator of the regulated MS4 system.
9VAC25-880-70. Part III. K. Signatory Requirements. Registration Statement. All Registration Statements shall be signed as follows:
a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a responsible corporate officer
means: (i) a president, secretary, treasurer, or vice-president of the corporation in charge of a principal business function, or
any other person who performs similar policy -making or decision -making functions for the corporation; or (ii) the manager
of one or more manufacturing, production, or operating facilities, provided the manager is authorized to make management
decisions that govern the operation of the regulated facility including having the explicit or implicit duty of making major
capital investment recommendations, and initiating and directing other comprehensive measures to assure long-term
compliance with environmental laws and regulations; the manager can ensure that the necessary systems are established or
actions taken to gather complete and accurate information forstate permit application requirements, and where authority
to sign documents has been assigned or delegated to the manager in accordance with corporate procedures,
b. For a partnership or sole proprietorship: by a general partner or the proprietor, respectively, or
c. For a municipality, state, federal, or other public agency: by either a principal executive officer or ranking elected official.
For purposes of this chapter, a principal executive officer of a public agency includes: (i) the chief executive officer of the
agency or (ii) a senior executive officer having responsibility for the overall operations of a principal geographic unit of the
agency.
Certification: "I certify under penalty of law that I have read and understand this Registration Statement and that this
document and all attachments were prepared in accordance with a system designed to assure that qualified personnel
properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage
the system or those persons directly responsible for gathering the information, the information submitted is to the best
of my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties for submitting
false information including the possibility of fine and imprisonment fqr _} owing violations."
Printed Name:
Signature (signed in ink):
Date:
Section VII. Submittal Instructions. Submit this form to the Virginia Stormwater Management Program (VSMP)
Authority. If the locality is the VSMP Authority, please send your Registration Statement submittal directly to the
locality; do NOT send this form to DEQ. A list of local VSMP Authorities is available here: VSMP Authorities.
If DEQ is the VSMP Authority, please send to:
Department of Environmental Quality
Office of Stormwater Management Suite 1400
PO Box 1105
Richmond VA 23218
constructiongp@dea.virginia.gov
If the locality is the VSMP Authority, please send to:
The Local VSMP Authority insert address below
Rev 04/2019 PAGE 4 1 7
Section 2. Notice of general permit coverage
(This notice is to be posted near the main entrance according to 9VAC25-880-70, Part II, section C.)
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 3. Nature of activity
EXISTING CONDITIONS:
THIS SITE IS A DEVELOPED BUT MOSTLY WOODED LOT OFF RIO RD EAST IN ALBEMARLE COUNTY. THIS
PROPERTY IS BORDERED ON THE EAST AND SOUTH BY RIO ROAD EAST. THE PROPERTY IS BORDERED ON THE
WEST AND NORTH BY DEVELOPED, PARTIALLY WOODED LOTS. THE PROPERTY IS CHARACTERIZED BY SLOPING
TERRAIN, ESPECIALLY AT THE PERIMETER.
PROPOSED DEVELOPMENT:
THIS SITE WILL BE DEVELOPED INTO A MULTI -UNIT COMMUNITY. IT WILL HAVE 36 SINGLE- AND MULIT-FAMILY
UNITS THAT WILL BE CLOSELY CONSTRUCTED TO FORM AN ECO-FRIENDLY SUSTAINABLE MODERN
NEIGHBORHOOD. THE DEVELOPMENT WILL HAVE FULL ONSITE NUTRIENT TREATMENT PROVIDED BY A MIX OF
BMPS.
THE TOTAL AREA OF DISTURBANCE IS 5.90 ACRES.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 4. Erosion and Sediment Control Plan.
THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE OF
CONSTRUCTION:
STAGE 1
1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN ON C8. INSTALL SILT FENCE SHOWN.
2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM.
3. WHEN OFFSITE STORM HAS BEEN INSTALLED, INSPECTED, AND STABILIZED, REMOVE CONSTRUCTION
ENTRANCE ON PARCEL AIA.
3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN.
4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS.
5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS SHOWN ON
SHEET C8.
6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2.
STAGE 2
1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON SHEET C9 AFTER STAGE 1 AREA IS GRADED.
2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN
ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION.
3. INSTALL UTILITIES AND GRADE ROAD AREAS.
4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE ADJUSTED IN THE
FIELD.
5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN
ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED.
STAGE 3
1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR REMOVAL OF
SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER)
2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO NOT
INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED
OUT.
3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN.
4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN STABILIZED.
INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION.
5. IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS UNTIL
EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS SHALL BE CONNECTED
TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT CONSTRUCTION. CONTACT DESIGN
ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS.
6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED.
FINAL
1. MAINTAIN CONTROLS UNTIL SITE STABILIZATION AND COUNTY INSPECTOR HAS APPROVED CONTROL
REMOVAL.
2. ANY SEDIMENT THAT ENTERS BMPS FROM CONSTRUCTION MUST BE CLEANED OUT BY CONTRACTOR.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
VSMP FLAN I=OR
LEGEND
EXIST
NEW
DESCRIPTION
16'TC
x 12'TC
TOP OF CURB ELEVATION
16°
x 12•
SPOT ELEVATION
16°TW
x 12'TW
TOP OF WALL ELEVATION
16•BW
x 12'BW
BOTTOM OF WALL ELEVATION
BENCHMARK
STORM SEWER
-im -
-RD -
ROOF DRAIN
�i
SEWER LINE
WATER LINE
-�-
-r+e-
GAS LINE
OVERHEAD ELECTRIC WIRE
�a
ux
UNDERGROUND ELECTRIC
-wr-
-wr-
OVERHEAD TELEPHONE LINE
UNDERGROUND TELEPHONE LINE
D
I-
DRAIN INLET (DI)
0
0
STORM/SANITARY MANHOLE
C
L
PLUG
®
®
WATER VALVE & BOX
FIRE HYDRANT
®
®
WATER METER
0-m
♦M
LIGHT POLE
UTILITY POLE
PROPERTY LINE
--
ADJACENT PROPERTY LINE
VACATED PROPERTY LINE
BUILDING SETBACK
�(-
PARKING SETBACK
SANITARY EASEMENT
--
--
GRADING EASEMENT
DRAINAGE EASEMENT
UTILITY EASEMENT
- - -
WATER EASEMENT
ACCESS EASEMENT
STORM DRAINAGE EASEMENT
TREE LINE
FENCE
STREAM
- 312-
- 12 -
INTERVAL CONTOUR
-300-
-00-
INDEX CONTOUR
CG-2
CG-2
STANDARD 6" CURB
CG-6
CG-6
COMBINATION 6" CURB & GUTTER
CONCRETE PAVEMENT / SIDEWALK
RIPRAP
ASPHALT
GRASS
EC-2 MATTING
JIMEC-3
MATTING
WETLAND
10
to
PARKING COUNT
11111111
11111111
CROSSWALK
HANDICAP ACCESSIBLE AISLE
®
®
CG-12
HANDICAP PARKING
NOTE:THE SIZE OF THE SYMBOLS MAY VARY FROM WHAT IS SHOWN
ECOVILLAGE C1IARLOTTE5VILLE
TMP 06 1 00-00-00-2 1 000
WFO 201900053
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VICINITY MAP SCALE: -I =500'
t S
High ChacII as S
School 5[adi um
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SITE -I
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Canliacling Chadottesvllle
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4
SHEET INDEX
C I - COVER SHEET
C2 - EX. CONDITIONS
* DEMO PLAN
C3
- 51TE LAYOUT
C4
- GRADING PLAN
C5
- UTILITY PLAN
CG
- UTILITY PLAN
C7
- ESCP NARRATIVE
C8
- ESCP PHASE I
C9
- ESCP PHASE 2
CIO
- ESCP PHASE 3
Cl I
- ESCP DETAILS
C 1 2
- ESCP DETAILS
C 1 3
- STORM PROFILES
C 14
- VSMP DETAILS
C 1 5
- VSMP DETAILS
IMAGE PROVIDED BY GOOGLE MAPS
OWNER / DEVELOPER
OWNER/DEVELOPER:
ECOVILLAGE HOLDING INC
480 RIO ROAD EAST
CHARLOTTESVILLE VA, 2290'.
MAGISTERIAL DISTRICT
ZONING
R4 RESIDENTIAI
SOURCE OF TITLE
DID 4582 PG 174
TMP 06100-00-00-21000
BENCHMARK
IRON & CAP BENCHMARKS SET THROUGHOUT SITE,
SITE DATUM NAVD88.
SOURCE OF BOUNDARY & TOPO
BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-21 FROM A FIELD SURVEY
PERFORMED BY ROGER W. RAY & ASSOC. INC ON AD0. 23, 2018.
BOUNDARY AND TOPOGRAPHIC INFO FOR TMP 61-AlA (OFFSITE PARCEL) FROM A
FIELD SURVEY PERFORMED BY NIXON LAND SURVEYING, LLC ON DEC. 12, 2016.
BUILDING HEIGHT
35' BY RIGHT
PROPOSED THREE STORY UNITS (VARIABLE HEIGHTS 35' OR LESS)
SETBACKS
5-25' FRONT SETBACK
20, REAR SETBACK
5-10' SIDE SETBACK
LIGHTING
NO OUTDOOR LIGHTING IS PROPOSED ON THE INITIAL SITE DEVELOPMENT PLAN.
TRASH REMOVAL
LOCATION OF TRASH TOTER STORAGE NOTED ON SITE LAYOUT (C3)
TRIP GENERATION
USE DESCRIPTION
ITE
Qty
li.
lout
total
lin
out
total
Townhomes(Mid-Rise)
1 2211
271
21
711
7
4
11
Single Family Homes
1 2101
ill
21
6
8
7
4
11
zz
SLOPES
THIS SITE CONTAINS 4,199 SF OF MANAGED STEEP SLOPES AND 41,772 SF OF PRESERVED
SLOPES PER FIELD SURVEY. 9,866 SF OF PRESERVED SLOPES OVERLAY WAS SURVEYED AT
LESS THAN 15% AND DO NOT QUALIFY AS PRESERVED SLOPES.
GENERAL CONSTRUCTION NOTES FOR
STORMWATER MANAGEMENT PLANS
1. ALL DAMS AND CONSTRUCTED FILL TO BE WITHIN 95% OF MAXIMUM DRY DENSITY AND 2% OF OPTIMUM
MOISTURE CONTENT. ALL FILL MATERIAL TO BE APPROVED BY A GEOTECHNICAL ENGINEER. A GEOTECHNI CAL
ENGINEER IS TO BE PRESENT DURING CONSTRUCTION OF DAMS.
2. PIPE AND RISER JOINTS ARE TO BE WATERTIGHT WITHIN STORMWATER MANAGEMENT FACILITIES.
3. FOR TEMPORARY SEDIMENT TRAPS OR BASINS WHICH ARE TO BE CONVERTED TO PERMANENT STORMWATER
MANAGEMENT FACILITIES; CONVERSION IS NOT TO TAKE PLACE UNTIL THE SITE IS STABILIZED, AND
PERMISSION HAS BEEN OBTAINED FROM THE COUNTY EROSION CONTROL INSPECTOR.
GENERAL CONSTRUCTION NOTES
1. PRIOR TO ANY CONSTRUCTION WITHIN ANY EXISTING PUBLIC RIGHT-OF-WAY, INCLUDING CONNECTION TO
ANY EXISTING ROAD, A PERMIT SHALL BE OBTAINED FROM THE VIRGINIA DEPARTMENT OF TRANSPORTATION
(VDOT). THIS PLAN AS DRAWN MAY NOT ACCURATELY REFLECT THE REQUIREMENTS OF THE PERMIT. WHERE
ANY DISCREPANCIES OCCUR THE REQUIREMENTS OF THE PERMIT SHALL GOVERN.
2. ALL MATERIALS AND CONSTRUCTION METHODS SHALL CONFORM TO CURRENT SPECIFICATIONS AND
STANDARDS OF VDOT UNLESS OTHERWISE NOTED.
3. EROSION AND SILTATION CONTROL MEASURES SHALL BE PROVIDED IN ACCORDANCE WITH THE APPROVED
EROSION CONTROL PLAN AND SHALL BE INSTALLED PRIOR TO ANY CLEARING, GRADING OR OTHER
CONSTRUCTION.
4. ALL SLOPES AND DISTURBED AREAS ARE TO BE FERTILIZED, SEEDED AND MULCHED.
5. THE MAXIMUM ALLOWABLE SLOPE IS 2:1 (HORIZONTAL: VERTICAL). WHERE REASONABLY OBTAINABLE, LESSER
SLOPES OF 3:1 OR BETTER ARE TO BE ACHIEVED.
6. PAVED, RIP -RAP OR STABILIZATION MAT LINED DITCH MAY BE REQUIRED WHEN IN THE OPINION OF THE
COUNTY ENGINEER, OR DESIGNEE, IT IS DEEMED NECESSARY IN ORDER TO STABILIZE A DRAINAGE CHANNEL.
7. ALL TRAFFIC CONTROL SIGNS SHALL CONFORM WITH THE VIRGINIA MANUAL FOR UNIFORM TRAFFIC CONTROL
DEVICES.
8. UNLESS OTHERWISE NOTED ALL CONCRETE PIPE SHALL BE REINFORCED CONCRETE PIPE - CLASS III.
9. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS FOR THE
CONSTRUCTION INDUSTRY (29 CM PART 1926).
EXISTING USE
2 SINGLE FAMILY HOMES
PROPOSED USE
25 TOWNHOME UNITS & 11 SINGLE FAMILY HOMES PROPOSED: 38 UNITS TOTAL
RESIDENTIAL DENSITY: 38 UNITS / 6.53 AC = 5.51 DU/ACRE
SITE AREA=6.53 AC (INCLUDES INTERIOR LOT TO BE ADDED TO PARENT PARCEL)
R4 DENSITY: 4 UNITS/AC = 6.53 X 4 = 26.1 UNITS BASE COUNT.
O
U M. SHIMP
DENSITY BONUSES:
45l83
SEC. 15.4.1: 10% AREA PRESERVED OPEN SPACE: 5% OF 26.1 = 1.3 UNITS ADD'L
.Na.
SEC. 15A.2: 6% AREA DEDICATED TO PUBLIC USE: 12% OF 26.1 = 3.1 UNITS ABET
SEC. 15.4.3: 50% OF UNITS AS AFFORDABLE UNITS: 30% OF 26.1 = 7.8 UNITS ADD;L.
�OF
TOTAL COUNT: 26.1+1.3+1.3+7.8 = 38.3 UNITS
d'SS�, 4.
LAND USE SCHEDULE
EXISTING AREA % PROPOSED AREA
BUILDING 3,605 SF 1.3% BUILDING 35,830 SF 12.6%
PAVEMENT 18.175 IF 6.4% PAVEMENT 39,204 SF 13.8%
TOTAL IMPERVIOUS 21,782 SF 7.7% SIDEWALK 23 847 SF 8 4%
OPEN SPACE 262 507 SF 92 3% TOTAL IMPERVIOUS 98,"1 SF 34.81
TOTAL- 284,289 SF (6.53 AC.) OPEN SPACE 185,408 SF 65.2%
TOTAL= 284.289 SF (6.53 AC.)
LIMITS OF DISTURBANCE: 5.90 AC
WATERSHEDS
THIS SITE LIES WITHIN THE MEADOW CREEK WATERSHED.
!'T`
o
PARKING
W
J
REQUIRED PARKING 75 SPACES
RESIDENTIAL 2 SPACES/UNITS PER UNIT = 72 SPACES
TOURIST/TRANSIENT LODGING: 1 FOR EACH OF 3 ROOMS 3 SPACES
PARKING PROVIDED: 75 SPACES
�I
-64 STANDARD SURFACE SPACES FOR RESIDENTS (INCLUDES 2 HC VAN SPACES)
FF��
-8 SPACES IN DRIVEWAYS FOR 8 UNITS
0
-3 SPACES PROVIDED FOR TOURIST/TRANSIENT LODGING (INCLUDS 2 HC VAN SPACES)
r \
V
FLOOD ZONE
ACCORDING TO THE FEMA FLOOD INSURANCE RATE MAP, EFFECTIVE DATE FEBRUARY
4, 2005 (COMMUNITY PANEL 51003CO287D), THIS PROPERTY DOES NOT LIE IN A
ZONE A 100-YEAR FLOOD PLAIN.
_.
GENERAL CONSTRUCTION NOTES FOR
EROSION AND SEDIMENT CONTROL PLANS
I. THE PLAN APPROVING AUTHORITY MUST BE NOTIFIED ONE WEEK PRIOR TO THE PRE -CONSTRUCTION CONFERENCE,
ONE WEEK PRIOR TO THE COMMENCEMENT OF LAND DISTURBING ACTIVITY, AND ONE WEEK PRIOR TO THE FINAL
INSPECTION.
2. ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM
STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINA
REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN
CLEARING.
4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN SHALL BE MAINTAINED ON THE SITE AT ALL
TIMES.
5. PRIOR TO COMMENCING LAND DISTURBING ACTIVITIES IN AREAS OTHER THAN INDICATED ON THESE PLANS
(INCLUDING, BUT NOT UNITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A
SUPPLEMENTARY EROSION CONTROL PLAN TO THE OWNER FOR RENEW AND APPROVAL BY THE PLAN APPROVING
AUTHORITY.
6. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY
TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
7. ALL DISTURBED AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND
DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
8. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE.
9. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF
PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE
EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
10. ALL FILL MATERIAL TO BE TAKEN FROM AN APPROVED, DESIGNATED BORROW AREA.
11. ALL WASTE MATERIALS SHALL BE TAKEN TO AN APPROVED WASTE AREA. EARTH FILL SHALL BE INERT MATERIALS
ONLY, FREE OF ROOTS, STUMPS, WOOD, RUBBISH, AND OTHER DEBRIS.
12. BORROW OR WASTE AREAS ARE TO BE RECLAIMED WITHIN 7 DAYS OF COMPLETION PER ZONING ORDINANCE SECTION
5.1.28.
13. ALL INERT MATERIALS SHALL BE TRANSPORTED IN COMPLIANCE WITH SECTION 13-301 OF THE CODE OF ALBEMARLE.
14. BORROW, FILL OR WASTE ACTIVITY INVOLVING INDUSTRIAL -TYPE POWER EQUIPMENT SHALL BE LIMITED TO THE
HOURS OF 7: OOAM TO 9:OOPM.
15, BORROW, FILL OR WASTE ACTIVITY SHALL BE CONDUCTED IN A SAFE MANNER THAT MAINTAINS LATERAL SUPPORT,
OR ORDER TO MINIMIZE ANY HAZARD TO PERSONS, PHYSICAL DAMAGE TO ADJACENT LAND AND IMPROVEMENTS,
AND DAMAGE TO ANY PUBLIC STREET BECAUSE 0 SLIDES, SINKING, OR COLLAPSE.
16. THE DEVELOPER SHALL RESERVE THE RIGHT TO INSTALL, MAINTAIN, REMOVE OR CONVERT TO PERMANENT
STORMWATER MANAGEMENT FACILITIES WHERE APPLICABLE ALL EROSION CONTROL MEASURES REQUIRED BY THIS
PLAN REGARDLESS OF THE SALE OF ANY LOT, UNIT, BUILDING OR OTHER PORTION OF THE PROPERTY.
17. TEMPORARY STABILIZATION SHALL BE TEMPORARY SEEDING AND MULCHING. SEEDING IS TO BE AT 75 LBS/ACRE,
AND IN THE MONTHS OF SEPTEMBER TO FEBRUARY TO CONSIST A 50/50 MIX OF ANNUAL RYEGRASS AND CEREAL
WINTER RYE, OR IN MARCH AND APRIL TO CONSIST OF ANNUAL RYE, OR MAY THROUGH AUGUST TO CONSIST OF
GERMAN MILLET. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY
THE COUNTY EROSION CONTROL INSPECTOR.
18. PERMANENT STABILIZATION SHALL BE LIME AND FERTILIZER, PERMANENT SEEDING, AND MULCH. AGRICULTURAL
GRADE LIMESTONE SHALL BE APPLIED AT 90LBS/1000SF, INCORPORATED INTO THE TOP 4-6 INCHES OF SOIL.
FERTILIZER SHALL BE APPLIED AT 1000LBS/ACRE AND CONSIST OF A 10-20-10 NUTRIENT MIX. PERMANENT
SEEDING SHALL BE APPLIED AT 180LBS/ACRE AND CONSIST OF 95% KENTUCKY 31 OR TALL FESCUE AND 0-5%
PERENNIAL RYEGRASS OR KENTUCKY BLUEGRASS. STRAW MULCH IS TO BE APPLIED AT 80LBS/100SF. ALTERNATIVES
ARE SUBJECT TO APPROVED BY THE COUNTY EROSION CONTROL INSPECTOR.
19. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR
CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIRED IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN
50% OF THE WE STORAGE VOLUME IS FILLED WITH SEDIMENT. ALL SEEDED AREAS ARE TO BE RESEEDED WHEN
NECESSARY TO ACHIEVE A GOOD STAND OF GRASS. SILT FENCE AND DIVERSION DYKES WHICH ARE COLLECTING
SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY.
20. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE REMOVED WITHIN 30 DAYS OF FINAL SITE
STABILIZATION, WHEN MEASURES ARE NO LONGER NEEDED, SUBJECT TO APPROVAL BY THE COUNTY EROSION
CONTROL INSPECTOR.
21. THIS PLAN SHALL BE VOID IF THE OWNER DOES NOT OBTAIN A PERMIT WITHIN 1 YEAR OF THE DATE OF APPROVAL.
(WATER PROTECTION ORDINANCE SECTION 17-204G.)
22. PERMANENT VEGETATION SHALL BE INSTALLED ON ALL DENUDED AREAS WITHIN NINE (9) MONTHS AFTER THE DATE
TIFF I AND DISTURBING ACTIVITY r..OMMFNf.M (WATER PROTFCTON ORDINANCE SFC..TION 17-207R)
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CITY T.M. 47A-150
_—__440- _
N
DEMO ALL EX. STRUCTURES Date
N n NNP '•\ _ --_, PgvEo of c ,� EXCEPT THIS BUILDING. / 09 23 201 9
l 41Lp^ P �^ IE [/A•e oti STATE/ROUTE 631 / /
Scale
N
40 0 40 80 120 Sheet No.
PRESERVED SLOPES - 2 OF 1 5
SURVEYED < 25% '+ Scale: 1 "=40' File Na.
CITY T.M. 47A-150 \
16.009
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RESIDENTIAL UNITS
27 TOWNHOMES (TH) o
SINGLE FAMILY HOMES (SF) _ 3
6 TOTAL UNITS o
QP / NEW SEGMENTAL _
5 7 \ BLOCK WALL. m U
MAX NEIGH
EACH, IL
1 A
42' HANDRAIL ON TOP WALL.
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PERIMETER LOTS
=EATED AREA: 0.84 AC
0
v �� - RICJI si urs �, -�� -• e � � � �. aA � � � v v
RIME O: ADS BAMLIER W. \ _ R nry 11 _ 2 FL iRA O A�' 'Shoo _ •� \ \
STORMTECH CHAMBERS ® ` YY iREA AREA:'.
TREAIED AREA: OJS AC BII() iORAGE (6) '
UNTREATED
AC AREA
EW S GM NTAL
5• M X EIGH ti 3 STORY TH / �-__� / � h ��� �y '? � � 9B / _ \
ACH. AV 4'. 11 � / / �' / 968 SF gq I '�- � / _� Oe� o y �ry / / \� \ t•Aj ` \ \ \
42" H N AIL
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T/ :a:".:.......... AD
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i
SF 12 I STAGE — ��I 2s O
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3 STORY TH / O / //G/•♦ -i'/ / COMMON �,,L \ _ �___'r/
r I / t)' �' 1p• I / OPEN SPACE HOUSESF2
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\s�� I ]68 sF �p •// i/ q1\\\
I �� ``" \ / � I• • } 968RSFTH )li ,� /� /F •.///BMP C1: 750 SF LEVEL l I 13 ST �. S TA T Q
/ / 2 TREATED
AREA:
} STORr iH / '�/ TREATED AREA: 0.76 AC '.".; �' n' � = � � RIO -
]68 J
c \I \1 °� // }ioa sFTH � � I �`«•`` '� /�� LR
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C y \ ]04 5F I FILTER STRIP
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` I BIKE STgtAGE (6) 1,815 SF
RMIL \ TURN 1056 SF ._
.
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YF LEVEL 1 RAIN GARDENSZ
IN INTERIOR LOTS
//N TREATED AREA 0.76 AC '
6-4
F SITE _
_______
=
STATE ROUTE 631
0
GUARD RIO ROAD EAST
N0-0 RAIL FCCC ���---ll
:O PRESERVED SLOPES
SURVEYED < 25%
Date
09 23 2019
Scale
1" = 30'
30 0 30 60 90 Sheet No.
C3 OF 15
Scale: 1 "=30' File No.
6.009
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PRESERVED SLOPES V A A 16 �- �/ V / - w
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PRESERVED SLOPES
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r
Date
09 23 2019
Scale
1" = 30'
30 0 30 60 90 Sheet No.
C4 OF 15
Scale: 1 "=30' File No.
16.009
BAN.
STORM
- - I
ENT �I
ENT
730
CONC. LD
TOP=38F0
INV=385.29
POW[
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C5 NOT TO SCALE C5 NOT TO SCALE
NOTE:
' \IN
LOTS IA-8A SHALL HAVE RAIN
m0
\
�191
GARDENS WITH A 67 SF FOOTPRINT.
LOTS 9A-17A SHALL HAVE RAIN
. \`
GARDENS WITH A 101 SF FOOTPRINT.
SEE SHEET C6 FOR REMAINING LOTS'
DETAILS..
RWSA WATER EASEMENT U M SHIMP
SRW—ARV-16 .Ja. !83
As \ \ Gv \w w� y�� 10�25�(�I ,C��,¢•
\c 41 \ 90'� _ \ ` •G'�� \ W �G� 30' UGE EASEMENT �F�, `(C•
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SEE SHEET C14 's. \ SpR Oy'' • � _ W yy
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STORMTECH CHAMBERS.,wTAEPYTED wRA
TREATED AREA: 0.78 AC
UNTREATED AREA + 2.61
AC AREA FROM BMPS A, -_-_- ei - - eEND
B,&C - - -
_ BEGIN BRAI�'CH / o�
T I I •15" HDPESTORM w a SB /
MP DROP INLET I t Bz I w �cETA ^Hi s6
J TOP=398.3
/ INV=390.
9A B4 Bx / BEND l
I
EXISTING PERMA
DRAINAGE EASE I I / 10A Io_ ` ,7A
1788 P. 730
z ,R
@1 A)
\\ 02 0 / 1 . Bfi" fi i OPEN SPACE
18,850 SIF o� /
48"RISER os
Lu
BMP Cl: 7;0 SF LEVEL I I Zir
I \ � 3 / 'I-- ` ' ` i ''` `•i� � 2 BIOFILTRp,TION BASIN. -.:• �._ �(
h r/ TREATED AREA: 0.76 AC
11 \ I r i 21A ' ii'.`.`�/ / / -:•Raa••♦ � � d '�j L
Lu• <<��c�i / —ww
J / I END BRANCH 2: BENDGv
> w Q
Data
09/23/2019
Scale
\ 3A 1 " = 30'
\ \\ \ w we _ • �Sheet No.
n o \ 11A90N zo o zo 40 s C5 OF 15
END BRNC IY•
z \ EHa Scale: 1 "=20' File Na.
16.009
RWSA WATER EASEMENT
SRW—ARV-16
W
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BENC
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48' RISER
BMP CI: AD SF LEVEL
2 310FILTRATION BASIN.
yi TREATED fEA: 0.76 AC
J�7
J
1
BMP A: (23) 75 SF
LEVEL 1 RAIN GARDENS
IN PERIMETER LOTS
TREATED AREA: 0.84 AC
_ W
1 )ROOF DOWNSPOUT DETAIL
C6 NOT TO SCALE
L_
II II II II III II 11 II II II II II II'II I
I - I''=11 II II II II II 'll II II
- II=11 II II II -II -II'II II II II=._
I II II II ' I II II II II II-11
- II II II II III III II II �I II
C6 NOT TO SCALE
NOTE:
LOTS 113-15B SHALL HAVE RAIN
GARDENS WITH A 67 SF FOOTPRINT.
BEGIN BRANCH 2:
W` \ 18'x8' ATER N E.
W RWSA WATERLINE
W
\
' \ \ \ P
0a 08 ` \ \
FBI
• • 20 4• 60
PROJECT DESCRIPTION, GENERAL NOTES, EROSION & SEDIMENT CONTROL NOTES, AND SEQUENCE OF CONSTRUCTION
2:AAY•ll11111�TY.YN 71]NTi
THIS SITE IS A DEVELOPED BUT MOSTLY WOODED LOT OFF RIO RD EAST IN ALBEMARLE
COUNTY BEING DEVELOPED INTO A MULTI -UNIT COMMUNITY.
THE TOTAL AREA OF DISTURBANCE IS 5.90 ACRES.
THE PROJECT INVOLVES THE FOLLOWING WORK ACTIVITIES:
1. THE CONTRACTOR SHALL OBTAIN ALL LOCAL AND STATE EROSION AND SEDIMENT
PERMITTING REQUIREMENTS AND MAINTAIN ALL EROSION AND SEDIMENT CONTROLS IN
ACCORDANCE WITH THE PERMIT REQUIREMENTS.
2. INSTALLATION OF PERMANENT EROSION AND SEDIMENT CONTROL MEASURES AS SHOWN
ON THE PLAN AND DETAILS.
3. GRADING AND PLACEMENT OF FILL SHALL BE IN GENERAL ACCORDANCE WITH THE
PLAN.
4. ESTABLISHMENT OF PERMANENT STABILIZATION OF ALL DISTURBED AREAS.
ADJACENT PROPERTIES
THIS PROPERTY IS BORDERED ON THE EAST AND SOUTH BY RIO ROAD EAST. THE
PROPERTY IS BORDERED ON THE WEST AND NORTH BY DEVELOPED, PARTIALLY WOODED
LOTS.
OFFSITE AREAS:
SOIL MAY NEED TO BE EXPORTED OFFSETS. IF OFFSITE WASTE AREAS ARE USED, THESE
SHALL HAVE EROSION CONTROL PERMITS,
SOILS
THE SITE CONTAINS THE FOLLOWING SOIL TYPES:
21B - CULPEPPER SANDY LOAM - 2 TO 7% SLOPES, HSG B
47D - LOUISBURG SANDY LOAM - 15 TO 25% SLOPES, HSG A
CRITICAL AREAS
THE CRITICAL AREA ON THE SITE IS RIO ROAD EAST. THE CONTRACTOR SHALL ENSURE
NO SILT ENTERS THE ROADWAY.
EROSION & SEDIMENT CONTROLS
1. SAFETY FENCE: A PROTECTIVE BARRIER INSTALLED TO PROHIBIT UNDESIRABLE USE OF
AN EROSION CONTROL MEASURE. STD. AND SPEC. 3.01.
2. CONSTRUCTION ENTRANCE: INSTALL AND MAINTAIN A CONSTRUCTION ENTRANCE,
AS NECESSARY, THAT MEETS THE REQUIREMENTS OF STD. AND SPEC. 3.02 AND
CONFORMS WITH THE REQUIREMENTS OF THE EROSION & SEDIMENT CONTROL PLAN.
3. SILT FENCE: INSTALL AND MAINTAIN SILT FENCE THAT MEETS THE REQUIREMENTS OF
STD. AND SPEC. 3.05. THIS SILT FENCE SHALL BE INSTALLED AS SHOWN ON THE
EROSION & SEDIMENT CONTROL PLAN AND ACCOMPANYING DETAILS FOR THE PURPOSE
OF INTERCEPTING SILT -LADEN RUNOFF BEFORE IT IS DISCHARGED FROM THE SITE. THE
SILT FENCE SHALL BE INSPECTED AND MAINTAINED TO ENSURE CONTINUED
PERFORMANCE.
4. TEMPORARY SEDIMENT TRAP: A SMALL PONDING AREA, FORMED BY CONSTRUCTING AN
EARTHEN EMBANKMENT WITH A STONE OUTLET ACROSS A DRAINAGE SWALE, TO
DETAIN SEDIMENT -LADEN RUNOFF FROM SMALL DISTURBED AREAS FOR ENOUGH TIME
TO ALLOW MOST OF THE SUSPENDED SOLIDS TO SETTLE OUT. MAXIMUM EFFECTIVE
LIFE IS 18 MONTHS. STD. AND SPEC. 3.13. TO BE CONVERTED INTO A PERMANENT
DETENTION POND AT THE END OF CONSTRUCTION AS DETAILED.
5. TEMPORARY DIVERSION DIKE: A RIDGE OF COMPACTED SOIL CONSTRUCTED AT THE
TOP OR BASE OF A SLOPING DISTURBED AREA WHICH DIVERTS SEDIMENT -LADEN
RUNOFF TO A SEDIMENT TRAPPING STRUCTURE. MAXIMUM EFFECTIVE LIFE IS 18
MONTHS. STD. AND SPEC. 3.09. THE CLEANWATER DIVERSIONS WILL BE MADE STABLE
BY THE USE OF VOOT LD-268 DESIGN STANDARDS.
6. TEMPORARY SEEDING: TEMPORARY SEEDING SHALL BE APPLIED TO ALL DENUDED
AREAS WITHIN SEVEN (7) DAYS TO DENUDED AREAS THAT MAY OR MAY NOT BE AT
FINAL GRADE BUT WILL REMAIN DORMANT (UNDISTURBED) FOR LONGER THAN 30
DAYS. TEMPORARY SEEDING SHALL BE APPLIED IN CONFORMANCE WITH STD. AND
SPEC. 3.31.
7. PERMANENT SEEDING: PERMANENT SEEDING SHALL BE APPLIED TO AREAS DELINEATED
ON THESE PLANS WITHIN SEVEN (7) DAYS AFTER FINAL GRADE IS REACHED ON ANY
PORTION OF THE SITE. PERMANENT SEEDING STABILIZES DISTURBED AREAS AND
ENHANCES THE BEAUTY OF THE SITE.
8. MULCHING: APPLICATION OF PLANT RESIDUES OR OTHER SUITABLE MATERIALS TO THE
SOIL SURFACE TO PREVENT EROSION AND FOSTER THE GROWTH OF VEGETATION.
ORGANIC MULCHES (STRAW) HAVE BEEN FOUND TO BE THE MOST EFFECTIVE.
9, DUST CONTROL: CONDUCT DUST CONTROL OPERATIONS NECESSARY TO MET THE
REQUIREMENTS OF STD. & SPEC. 3.39 AS REQUIRED TO CONTROL SURFACE AND
AIRBORNE MOVEMENT OF DUST.
10. REST PROTECTION: INLET PROTECTION MEASURES ARBURR THE NEW INLETS SHALL BE
PROVIDED IN ACCORDANCE WITH STD. AND SPEC. 3.07. SILT FENCE, STRAW BALES OR
TEMPORARY STONE APPLICATIONS SHALL BE APPLIED AS APPROPRIATE FOR CURRENT
GRADE CONDITIONS.
11.OUTLET PROTECTOR: RIP -RAP SHALL BE PROVIDED AT THE OUTFALL OF CONVEYANCE
CHANNELS, CULVERTS, AND STORM SEWERS IN CONFORMANCE WITH STD. AND SPEC.
3.18. OUTLET PROTECTION SHALL BE INSTALLED NTH ACCOMPANYING STORM SEWERS
AND SHALL BE INSPECTED AFTER EACH RAINFALL EVENT AND REPAIRED IF
NECESSARY. ANT SEDIMENT BUILD UP SHALL BE REMOVED.
PERMANENT STABILIZATION AND SEQUENCE OF CONSTRUCTION
THE FOLLOWING ARE THE PROPOSED MANAGEMENT STRATEGIES AND DETAILED SEQUENCE
OF CONSTRUCTION:
STAGE 1
1. INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN ON C8.
INSTALL SILT FENCE SHOWN.
2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM.
3. WHEN OFFSITE STORM HAS BEEN INSTALLED, INSPECTED, AND STABILIZED,
REMOVE CONSTRUCTION ENTRANCE ON PARCEL A1A.
3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN.
4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS
5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS
GRADING, STARTING AS SHOWN ON SHEET C8.
6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2.
STAGE 2
1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON SHEET C9
AFTER STAGE 1 AREA IS GRADED.
2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING
PROCEEDS. CONTACT DESIGN ENGINEER TO INSPECT AND CONFIRM PROPER
INSTALLATION.
3. INSTALL UTILITIES AND GRADE ROAD AREAS.
4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES
AND CAN BE ADJUSTED IN THE FIELD.
5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED.
CONTACT BOTH DESIGN ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS
REMOVED.
STAGE 3
1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING
(PRIMARILY FOR REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE
PERIMETER)
2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER
PARKING AREA. DO NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN
ENTIRELY STABILIZED AND SYSTEM HAS BEEN CLEANED OUT.
3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN.
4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED
MUST REMAIN STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER
CONSTRUCTION.
5. IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT
INSTALL RAIN GARDENS UNTIL EACH RESPECTIVE HOUSE HAS BEEN
CONSTRUCTED. THE RAIN GARDEN LEDERERAINS SHALL BE CONNECTED TO THE
STORM DRAINS WITH INSERT -TEES AS THE FINAL STEP OF LOT CONSTRUCTION.
CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS.
6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY
STABILIZED.
FINAL
1. MAINTAIN CONTROLS UNTIL SITE STABILIZATION AND COUNTY INSPECTOR HAS
APPROVED CONTROL REMOVAL.
2. ANY SEDIMENT THAT ENTERS BMPS FROM CONSTRUCTION MUST BE CLEANED OUT BY
CONTRACTOR.
CONSTRUCTION MAINTENANCE
THE FOLLOWING CONSTRUCTION MAINTENANCE PRACTICES SHALL BE FOLLOWED AT THE SITE.
1. ALL E&S CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT RAIN
EVENT. ALL DEFICIENCIES IDENTIFIED DURING THESE INSPECTIONS SHALL BE CORRECTED AS
SOON AS PRACTICABLE.
2. THE SILT FENCE BARRIER SHALL BE REGULARLY CHECKED FOR UNDERMINING, DETERIORATION OR
SIGNIFICANT EROSION. SEDIMENT SHALL BE REMOVED AFTER EACH STORM EVENT AND WHEN THE
LEVEL OF SEDIMENT DEPOSITION REACHES HALF THE HEIGHT OF THE CONTROL.
3. THE CONTRACTOR IS RESPONSIBLE FOR ADHERING TO ALL MAINTENANCE REQUIREMENTS SET
FORTH IN THE CURRENT EDITION OF THE VIRGINIA SEDIMENT AND EROSION CONTROL MANUAL,
OTHER APPLICABLE COMMONWEALTH OF VIRGINIA REGULATIONS AND THE PROJECT
SPECIFICATIONS.
C ALL SEEDED AREAS WILL BE REGULARLY CHECKED TO ENSURE THAT A GOOD STAND OF GRASS
IS MAINTAINED.
5. AREAS WITH RIP -RAP SHOULD BE REGULARLY INSPECTED TO DETERMINE IF HIGH FLOWS HAVE
DAMAGED THESE CONTROLS OR CAUSED EXCESSIVE SEDIMENT DEPOSITION. ALL AREAS SHALL
BE MAINTAINED IN ACCORDANCE WITH THE REQUIREMENTS OF THIS E&S CONTROL PLAN.
ENVIRONMENTAL CONTROLS
1. CONTRACTOR SHALL PROVIDE AND MAINTAIN ALL ENVIRONMENTAL CONTROL MEASURES SO AS
TO COMPLY WITH LOCAL ORDINANCES, STATE AND FEDERAL LAWS AND REGULATIONS APPLICABLE
TO WATER POLLUTION IN WATERS OF THE STATE AND IN INTERSTATE WATERS.
2. CONTRACTOR SHALL MINIMIZE THE POTENTIAL FOR AIR POLLUTION BY THE USE OF EMISSION
CONTROL EQUIPMENT ON CONTRACTOR OPERATED EQUIPMENT, SHUT -DOWN OF MOTORIZED
EQUIPMENT WHEN NOT IN USE, AND ACTIVELY CONTROLLING DUST EMISSIONS THROUGHOUT THE
PROJECT.
EROSION & SEDIMENT CONTROL PERMITTING
CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL LOCAL AND STATE EROSION AND
SEDIMENT CONTROL PERMITS AND MAINTAINING ALL EROSION AND SEDIMENT CONTROLS IN
ACCORDANCE WITH THE PERMIT REQUIREMENTS.
GENERAL NOTES
1. THE INFORMATION AND DATA SHOWN OR INDICATED WITH RESPECT TO THE EXISTING
UNDERGROUND UTILITIES AT OR CONTIGUOUS TO THE SITE ARE BASED ON INFORMATION AND
DATA FURNISHED TO THE OWNER AND ENGINEER BY THE OWNERS OF SUCH UNDERGROUND
FACILITIES OR OTHERS. THE OWNER OR ENGINEER SHALL NOT BE RESPONSIBLE FOR THE
ACCURACY OR COMPLETENESS OF SUCH INFORMATION OR DATA. THE CONTRACTOR SHALL HAVE
FULL RESPONSIBILITY FOR CONFIRMING THE ACCURACY OF THE DATA, FOR LOCATING ALL
UNDERGROUND UTILITIES, FOR COORDINATION OF THE WORK WITH OWNERS OF SUCH
UNDERGROUND UTILITIES DURING CONSTRUCTION, FOR THE SAFETY AND PROTECTION
THEREOF AND REPAIRING ANY DAMAGE THERETO RESULTING FROM THE WORK. ALL OF THESE
CONDITIONS SHALL BE MET AT NO ADDITIONAL COST TO THE OWNER. THE CONTRACTOR SHALL
CONTACT "MISS UTILITIES° OF VIRGINIA AT 1-800-552-7001 PRIOR TO THE START OF WORK.
2, WHEN WORKING ADJACENT TO EXISTING STRUCTURES, POLES, UTILITIES, ETC., THE CONTRACTOR
SHALL USE WHATEVER METHODS THAT ARE NECESSARY TO PROTECT STRUCTURES FROM
DAMAGE. ANY DAMAGE CAUSED BY THE CONTRACTOR OR ITS SUBCONTRACTORS SHALL BE THE
CONTRACTOR'S SOLE RESPONSIBILITY TO REPAIR OR REPLACE. THIS EXPENSE IS THE
CONTRACTOR'S RESPONSIBILITY.
3. REPLACEMENT OR REPAIR OF DAMAGED STRUCTURES SHALL BE AT THE CONTRACTOR'S EXPENSE.
4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR PROTECTING ALL EXISTING SITE STRUCTURES
FROM DAMAGE AND COORDINATING WORK SO THAT THE OWNER CAN MAKE NECESSARY
ARRANGEMENTS TO MODIFY/PROTECT EXISTING STRUCTURES FROM DAMAGES.
5, THE CONTRACTOR SHALL BE RESPONSIBLE FOR NOTIFYING ALL UTILITY OWNERS, ADJACENT LAND
OWNERS WHOSE PROPERTY MAY BE IMPACTED AND THE VIRGINIA DEPARTMENT OF
TRANSPORTATION PRIOR TO COMPLETING ANY OFF -SITE WORK.
6. CONTRACTOR SHALL NOTIFY AND COORDINATE ALL WORK INVOLVING EXISTING UTILITIES WITH
UTILITY OWNERS, AT LEAST 72 HOURS PRIOR TO THE START OF CONSTRUCTION.
7. ALL EXCAVATION FOR UNDERGROUND PIPE INSTALLATION MUST COMPLY WITH OSHA STANDARDS
FOR THE CONSTRUCTION INDUSTRY 1
29 OFF PART 1926).
8. THE CONTRACTOR SHALL VERIFY THE LOCATIONS OF ALL BOUNDARIES, BUILDINGS, VEGETATION,
AND OTHER PERTINENT SITE ELEMENTS, CONTRACTOR SHALL IMMEDIATELY REPORT ANY
DISCREPANCIES BETWEEN EXISTING CONDITIONS AND CONTRACT DOCUMENTS TO THE OWNER AND
ENGINEER.
9. CONTRACTOR TH SHALL SUBMIT FOR THE APPROVAL OF E OWNER SUBMITTALS OF ALL SPECIFIED
MATERIALS LISTED IN THE PLANS, TO INCLUDE SHOP DRAWNGS, MANUFACTURER'S
SPECIFICATIONS AND LABORATORY REPORTS. THE OWNER'S APPROVAL OF SUBMITTALS WILL BE
GENERAL AND WILL NOT RELIEVE THE CONTRACTOR FROM THE RESPONSIBILITY OF ADHERENCE
TO THE CONTRACT AND FOR ANY ERROR THAT MAY EXIST.
10. CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING ALL NECESSARY PERMITS, INSPECTIONS,
BONDS, AND OTHER RELATED ITEMS IN ACCORDANCE WITH LOCAL AND STATE POUCY.
STORMWATER MANAGEMENT NOTES:
1. ALL CONCETNRATED ONSITE RUNOFF SHALL BE ROUTED INTO MEADOW CREEK.
SINCE THE SITE IS LESS THAN 1% OF THE TOTAL DRAINAGE AREA TO THE
POINT OF DISCHARGE IN MEADOW CREEK, NO CHANNEL ANALYSIS FOR
EROSION OR FLOOD PROTECTION IS REQUIRED.
2. ONSITE RUNOFF SHALL BE CONVEYED USING STORM DRAINS.
3. WATER QUALITY WILL BE ADDRESSED BY THE USE OF BIORIETRATION BASINS,
RAIN GARDENS, AND A MANUFACTURED TREATMENT DEVICE. THESE WILL MEET
THE VRRM REDEVELOPMENT NUTRIENT REMOVAL REQUIREMENTS PER
9VAC25-870-65.
4. BMP COORDINATES:
• BMP A: RAIN GARDENS, VARIES.
• BMP B: RAIN GARDENS, VARIES.
• BMP Cl: 38,049256,-78.464854
• BMP C2: 38.048940,-78.465583
• BMP D: 38.048640,-78.465458
5. BMP A & B DETAILS:
BMP'S A & B ARE LEVEL 1 VRRM-COMPLIANT RAIN GARDENS. EACH HOUSE
HAS A RAIN GARDEN, THE RAIN GARDENS ON THE PERIMETER LOTS ARE
CONSIDERED BMP A. THE RAIN GARDENS ON THE INTERIOR LOTS ARE
CONSIDERED BMP B. BMP A WILL TREAT A TOTAL OF 0.84 ACRES, WHICH
INCLUDES 0.48 ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1893
CF. BMP B WILL TREAT A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.37
ACRES IMPERVIOUS. THE DESIGN TREATMENT VOLUME IS 1508 CF. ALL RAIN
GARDENS INCLUDE 18" OF FILTER MEDIA ABOVE 12" OF STONE. EACH HAS A
6" PERFORATED PVC UNDERDRAIN.
6. BMP C1 & C2 ARE LEVEL 2 VRRM-COMPLIANT BIORIETRATION BASINS. BMP Cl
TREATS A TOTAL OF 0.76 ACRES, WHICH INCLUDES 0.21 ACRES IMPERVIOUS.
BMP C HAS A TREATMENT VOLUME OF 1105 CF. C2 TREATS A TOTAL OF 0.25
ACRES, WHICH INCLUDES 0.03 ACRES IMPERVIOUS. BMP C2 HAS A TREATMENT
VOLUME OF 231 CF. BOTH BIORIETRATION BASINS INCLUDE 24" FILTER MEDIA
OVER 18" 57 STONE (Cl) AND 12" 57 STONE (C2) WHICH HAVE A 6-
PE FORATED UNDERDRAIN. BOTH BMPS HAVE GRAVEL FLOW SPREADERS AND
GRASS FILTER STRIPS AS PRETREATMENT OPTIONS.
D. BMP D IS A MANUFACTURED TREATMENT DEVICE. THIS INCLUDES STORMTECH
CHAMBERS WITH AN ISOLATOR ROW AND A BAYFILTER TREATMENT. THIS BMP
PROVIDES 70% TP REMOVAL. TREATMENT VOLUME IS 6,924 CF.
BAYFLITER BMP INSTALLATION NOTES
THE FOLLOWING INSTALLATION PRACTCES SHALL BE FOLLOWED AT THE SITE
1. FOLLOW ALL MANUFACTURER GUIDELINES SPECIFIED ON SHEET C15.
2. EXCAVATE THE BAYFILTER PRACTICE TO THE DESIGN DIMENSIONS FROM THE SIDE, USING A
BACKHOE OR EXCAVATOR. THE FLOOR OF THE PIT SHOULD BE COMPLETELY LEVEL. EQUIPMENT
SHALL BE KEPT OFF THE FLOOR AREA TO PREVENT SOIL COMPACTION.
3. CORRECTLY INSTALL FILTER FABRIC ON THE TRENCH SIDES. LARGE TREE ROOTS SHOULD BE
TRIMMED FLUSH WITH THE SIDES OF INFILTRATION TRENCHES TO PREVENT PUNCTURING OR
TEARING OF THE FILTER FABRIC DURING SUBSEQUENT INSTALLATION PROCEDURES. WHEN LAYING
OUT THE GEOTEXTILE, THE WIDTH SHOULD INCLUDE SUFFICIENT MATERIAL TO COMPENSATE FOR
PERIMETER IRREGULARITIES IN THE TRENCH AND FOR A 6-INCH MINIMUM OVERLAP AT THE TOP
OF THE TRENCH. THE FILTER FABRIC ITSELF SHOULD BE TUCKED UNDER THE SAND LAYER ON
THE BOTTOM OF THE TRENCH. STONES OR OTHER ANCHORING OBJECTS SHOULD BE PLACED ON
THE FABRIC AT THE TRENCH SIDES, TO KEEP THE TRENCH OPEN DURING WINDY PERIODS. VOIDS
MAY OCCUR BETWEEN THE FABRIC AND THE EXCAVATED SIDES OF A TRENCH. NATURAL SOILS
SHOULD BE PLACED IN ALL VOIDS, TO ENSURE THE FABRIC CONFORMS SMOOTHLY TO THE SIDES
OF EXCAVATION.
4. SCARIFY THE BOTTOM OF THE BAYFILTER BMP, AND INSTALL FILTER STONE PER SPECS.
5. PLACE STORAGE CHAMBERS AT SPECIFIED INVERT. CHAMBERS MUST BE FLAT WITH A 0%
BIOFILTER INSTALLATION NOTES
1. CONSTRUCTION OF THE BIORETENTION AREA MAY ONLY BEGIN AFTER THE
ENTIRE CONTRIBUTING DRAINAGE AREA HAS BEEN STABILIZED WITH VEGETATION.
IT MAY BE NECESSARY TO BLOCK CERTAIN CURB OR OTHER INLETS WHILE THE
BIORETENTION AREA IS BEING CONSTRUCTED. THE PROPOSED SITE SHOULD BE
CHECKED FOR EXISTING UTILITIES PRIOR TO ANY EXCAVATION.
2. THE DESIGNER AND THE INSTALLER SHOULD HAVE A PRECONSTRUCTION
MEETING, CHECKING THE BOUNDARIES OF THE CONTRIBUTING DRAINAGE AREA
AND THE ACTUAL INLET ELEVATIONS TO ENSURE THEY CONFORM TO ORIGINAL
DESIGN. SINCE OTHER CONTRACTORS MAY BE RESPONSIBLE FOR CONSTRUCTING
PORTIONS OF THE SITE, IT IS QUITE COMMON TO FIND SUBTLE DIFFERENCES IN
SITE GRADING, DRAINAGE AND PAVING ELEVATIONS THAT CAN PRODUCE
HYDRAULICALLY IMPORTANT DIFFERENCES FOR THE PROPOSED BIORETENTION
AREA. THE DESIGNER SHOULD CLEARLY COMMUNICATE, IN WRITING, ANY
PROJECT CHANGES DETERMINED DURING THE PRECONSTRUCTION MEETING TO
THE INSTALLER AND THE PLAN REVIEW/INSPECTION AUTHORITY.
3. TEMPORARY E&S CONTROLS ARE NEEDED DURING CONSTRUCTION OF THE
BIORETENTION AREA TO DIVERT STORMWATER AWAY FROM THE BIORETENTION
AREA UNTIL IT IS COMPLETED. SPECIAL PROTECTION MEASURES SUCH AS
EROSION CONTROL FABRICS MAY BE NEEDED TO PROTECT VULNERABLE SIDE
SLOPES FROM EROSION DURING THE CONSTRUCTION PROCESS.
4. ANY PRE-TREATMENT CELLS SHOULD BE EXCAVATED FIRST AND THEN
SEALED TO TRAP SEDIMENTS.
5. EXCAVATORS OR BACKHOES SHOULD WORK FROM THE SIDES TO EXCAVATE
THE BIORETENTION AREA TO ITS APPROPRIATE DESIGN DEPTH AND DIMENSIONS.
EXCAVATING EQUIPMENT SHOULD HAVE SCOOPS WITH ADEQUATE REACH SO
THEY DO NOT HAVE TO SIT INSIDE THE FOOTPRINT OF THE BIORETENTION
AREA. CONTRACTORS SHOULD USE A CELL CONSTRUCTION APPROACH IN
LARGER BIORETENTION BASINS, WHEREBY THE BASIN IS SPLIT INTO 50C TO
1,000 SQ. FT. TEMPORARY CELLS WITH A 10-15 FOOT EARTH BRIDGE IN
BETWEEN, SO THAT CELLS CAN BE EXCAVATED FROM THE SIDE.
6. IT MAY BE NECESSARY TO RIP THE BOTTOM SOILS TO A DEPTH OF 6 TO 12
INCHES TO PROMOTE GREATER INFILTRATION.
7. PLACE GEOTEXTILE FABRIC ON THE SIDES OF THE BIORETENTION AREA WITH
A 6-INCH OVERLAP ON THE SIDES. IF A STONE STORAGE LAYER WILL BE
USED, PLACE THE APPROPRIATE DEPTH OF q57 STONE ON THE BOTTOM,
INSTALL THE PERFORATED UNDERDRAIN PIPE PACK 57 STONE TO 3 INCHES
ABOVE THE UNDERDRAIN PIPE, AND ADD APPROXIMATELY 3 INCHES OF CHOKER
STONE/PEA GRAVEL AS A FILTER BETWEEN THE UNDERDRAIN AND THE SOIL
MEDIA LAYER. IF NO STONE STORAGE LAYER IS USED, START WITH 6 INCHES
OF #57 STONE ON THE BOTTOM, AND PROCEED WITH THE LAYERING AS
DESCRIBED ABOVE.
8. OBTAIN SOIL THE MEDIA FROM A QUALIFIED VENDOR, AND STORE IT ON AN
ADJACENT IMPERVIOUS AREA OR PLASTIC SHEETING. AFTER VERIFYING THAT
THE MEDIA MEETS THE SPECIFICATIONS, APPLY THE MEDIA IN 12-INCH LIFTS
UNTIL THE DESIRED TOP ELEVATION OF THE BIORETENTION AREA IS ACHIEVED.
WAIT A FEW DAYS TO CHECK FOR SETTLEMENT, AND ADD ADDITIONAL MEDIA,
AS NEEDED, TO ACHIEVE THE DESIGN ELEVATION.
9. PREPARE PLANTING HOLES FOR ANY TREES AND SHRUBS, INSTALL THE
VEGETATION, AND WATER ACCORDINGLY. INSTALL ANY TEMPORARY IRRIGATION.
10. PLACE THE SURFACE COVER IN BOTH CELLS (MULCH, RIVER STONE OR
TURF), DEPENDING ON THE DESIGN. IF COIR OR JUTE MATTING WILL BE USED IN
LIEU OF MULCH, THE MATTING WILL NEED TO BE INSTALLED PRIOR TO
PLANTING (STEP 9), AND HOLES OR SLITS WILL HAVE TO BE CUT IN THE
MATTING TO INSTALL THE PLANTS.
11. INSTALL THE PLANT MATERIALS AS SHOWN IN THE LANDSCAPING PLAN,
AND WATER THEM DURING WEEKS OF NO RAIN FOR THE FIRST TWO MONTHS.
FINAL BMP INSPECTION CHECKLIST
❑ PRE -CONSTRUCTION MEETING WITH THE CONTRACTOR DESIGNATED TO INSTALL THE
INFILTRATION PRACTICE HAS BEEN CONDUCTED.
❑ SUBSURFACE INVESTIGATION AND SOILS REPORT SUPPORTS THE PLACEMENT OF AN
INFILTRATION PRACTICE IN THE PROPOSED LOCATION.
❑ IMPERVIOUS COVER HAS BEEN CONSTRUCTED/INSTALLED AND AREA IS FREE OF
CONSTRUCTION EQUIPMENT, VEHICLES, MATERIAL STORAGE), ETC.
❑ AREA OF INFILTRATION PRACTICE HAS NOT BEEN IMPACTED DURING CONSTRUCTION.
❑ ALL PERVIOUS AREAS OF THE CONTRIBUTING DRAINAGE AREAS HAVE BEEN
ADEQUATELY STABILIZED WITH A THICK LAYER OF VEGETATION AND EROSION CONTROL
MEASURES HAVE BEEN REMOVED.
❑ STORMWATER HAS BEEN DIVERTED AROUND THE AREA OF THE INFILTRATION PRACTICE
AND PERIMETER EROSION CONTROL MEASURES TO PROTECT THE FACILITY DURING
CONSTRUCTION HAVE BEEN INSTALLED. .
❑ EXCAVATION OF THE INFILTRATION PRACTICE HAS ACHIEVED PROPER GRADES AND THE
REQUIRED GEOMETRY FOR THE SUBSURFACE INFILTRATION TRENCH OR THE SURFACE
INFILTRATION BASIN WITHOUT COMPACTING THE BOTTOM OF THE EXCAVATION.
❑ CERTIFICATION OF EXCAVATION INSPECTION: INSPECTOR CERTIFIES THE SUCCESSFUL
COMPLETION OF THE EXCAVATION STEPS LISTED ABOVE.
❑ FOR INFILTRATION TRENCHES, PLACEMENT OF FILTER FABRIC, AS REQUIRED, ON THE
SIDE SLOPES.
❑ BOTTOM OF TRENCH HAS BEEN SCARIFIED.
❑ SIX-INCH FILTER LAYER OF SAND PLACED ON THE TRENCH BOTTOM
❑ OBSERVATION WELL INSTALLED.
❑ REMAINING STONE AGGREGATE PLACED (NOT DUMPED) IN 6-INCH LIFTS.
El TO SURFACE OF INFILTRATION PRACTICE IN ACCORDANCE WITH APPROVED PLANS.
❑ ALL EROSION AND SEDIMENT CONTROL PRACTICES HAVE BEEN REMOVED.
❑ FOLLOW-UP INSPECTION AND AS -BUILT SURVEY/CERTIFICATION HAS BEEN SCHEDULED.
❑ GPS COORDINATES HAVE BEEN DOCUMENTED FOR ALL INFILTRATION PRACTICES ON THE
PARCEL.
LONG-TERM BMP MAINTENANCE
CHECKLIST
• ENTRY INTO UNDERGROUND PIPES REQUIRES CONFINED SPACE CERTIFICATION.
THE DRAWDOWA RATE SHOULD BE MEASURED AT THE OBSERVATION WELL
FOR THREE DAYS FOLLOWING A STORM EVENT IN EXCESS OF 1/2 INCH IN DEPTH.
IF STANDING WATER IS STILL OBSERVED IN THE WELL AFTER THREE DAYS, THIS IS
A CLEAR SIGN THAT THAT CLOGGING IS A PROBLEM.
CHECK INLETS, PRE-TREATMENT CELLS, AND ANY FLOW DIVERSION
STRUCTURES FOR SEDIMENT BUILDUP AND STRUCTURAL DAMAGE. NOTE IF ANY
SEDIMENT NEEDS TO BE REMOVED.
INSPECT THE CONDITION OF THE OBSERVATION WELL AND MAKE SURE IT IS
STILL CAPPED.
CHECK THAT NO VEGETATION FORMS AN OVERHEAD CANOPY THAT MAY DROP
LEAF LITTER, FRUITS AND OTHER VEGETATIVE MATERIALS THAT COULD CLOG THE
INFILTRATION DEVICE.
EVALUATE THE VEGETATIVE QUALITY OF THE ADJACENT GRASS BUFFER AND
PERFORM SPOT -RESEEDING IF THE COVER DENSITY IS LESS THAN 90%.
GENERALLY INSPECT THE UPLAND CONTRIBUTING DRAINAGE AREA FOR ANY
CONTROLLABLE SOURCES OF SEDIMENT OR EROSION.
LOOK FOR WEEDY GROWTH ON THE STONE SURFACE THAT MIGHT INDICATE
SEDIMENT DEPOSITION OR CLOGGING.
INSPECT MAINTENANCE ACCESS TO ENSURE IT IS FREE OF WOODY
VEGETATION, AND CHECK TO SEE WHETHER VALVES, MANHOLES AND/OR LOCKS
CAN BE OPENED AND OPERATED.
INSPECT INTERNAL AND EXTERNAL INFILTRATION SIDE SLOPES FOR EVIDENCE
OF SPARSE VEGETATIVE COVER, EROSION OR SLUMPING, AND MAKE NECESSARY
REPAIRS IMMEDIATELY.
INSPECT UNDERGROUND PRETREATMENT CELL. REMOVE SEDIMENT OR DEBRIS
FROM PRETREATMENT. IF SILT BUILDUP IS NOTICED, REMOVE SILT AND REPLACE
CLOGGED FILTER FABRIC IMMEDIATELY.
• LONG-TERM MAINTENANCE INSPECTIONS SHOULD OCCUR ANNUALLY.
MINIMUM STANDARDS (MSC
All applicable Virginia Erosion and Sediment Control Regulations and Minimum
Standards shall be adhered to during all phases of construction. These
include, but are not limited to the following:
T STABLIZATION OF DENUDED AREAS:
Permanent or temporary soil stabilization shall be applied to bare areas
within seven days after final grade is reached o any portion of the site.
Temporary soil stabilization shall be applied with in seven
s n days to denuded
s that may not be at final grade, but will remain dormant o
undisturbed for longer than 30 days. Permanent stabilization shall be
applied at areas that are to be left dormant for more than 1 year.
2.STABILIZATION OF SOIL STOCKPILES:
During c nstruction of the project, soil stockpiles shall be stabilized o
protected with sediment trapping m The applicant is responsible for
temporary protection and permanent stabilization of all soil stockpiles on
site as well as soil intentionally transported from the project site.
3.PERMANENT VEGETATIVE COVER
A permanent vegetative cover shall be established on denuded a not
otherwise permanently stabilized. Permanent vegetation shall not be s
n sidered established until a ground c achieve that, in the opinion
of the county Inspector, is uniform and mature enough to survive to inhibit
erosion
4.TIMING & STABILIZATION OF SILT TRAPPING MEASURES:
Sediment basins and traps, perimeter dikes, sediment barriers and other
measureintended to trap sediment shall be constructed a a first step in
any lands disturbing activity and shall be made functional before upslope
land disturbance takes place.
5.STABILIZATION OF EARTHEN STRUCTURES:
Stabilization measures
shall bs applied to earthen structures such as
dams, dikes and diversions immediately after installation.
&SEDIMENT TRAPS AND BASINS:
A sediment basin shall control surface runoff from disturbed areas that is
m oprised of flow from drainage a r s greater than o equal to three a
The sediment basin shall be designed and constructed to accommodate the
an sediment loading for the land disturbing activity. The outfall
device or system device shall take into a in account the total draage area
flowing through the disturbed area to be served by the basin.
7. CUT AND FILL SLOPES:
Cut and fill slopes shall be designed and constructed in manner that
will m Slopes that are found 10 be eroding ae vely
With in minimize
permanent stabilization shall be provided with sadditional
slope stabilizing measures until the problem is corrected.
& CONCENTRATED RUN-OFF DOWN CUT OR FILL SLOPES:
Concentrated runoff shall not flow down cut or fill slopes unless contained
within a adequate temporary or permanent channel, flume, or slope drain
structure.
9.WATER SEEPS FROM A SLOPE FACE:
When water seeps from a slope face, adequate drainage or other
protection shall be provided.
10.STORM SEWER INLET PROTECTION:
All storm se inlets that a made operable during construction shall
be protected so cannot
to remove sediment.
that sediment -laden water c not enter the conveyance
system without first being filtered or otherwise
11, STABILIZATION OF OUTLETS:
Before newly constructed storm -ter conveyance channels a more
operational, adequate outlet protection and any required temporary or
permanent channel lining shall be installed in both the conveyance channel
and receiving channel.
12.WORK IN LIVE WATERCOURSES:
When work in a live Watercourse is performed, precautions shall be taken
m
tom 0a chment, control sediment transport and stabilize the work
area to the greatest extent possible during construction. Nonerodble
material shall be used for the construction of causeways and cofferdams.
Earthen fill may be used for these structures if armored by nonerodible
cover materials.
13.CROSSING A LIVE WATERCOURSE:
When a live watercourse mo
ust be crossed by construction vehicles more
than twice in any si month period, atemporary stream crossing
constructed of nonerodible materials shall be provided.
14. APPLICABLE REGULATIONS:
All applicable federal, state and local regulations pertaining to working in
or crossing live watercourses shall be met.
15. STABILIZATION OF BED AND BANKS
The bed and banks of a Watercourse shall be stabilized immediately after
work in the watercourse is completed.
16. UNDERGROUND UTILITIES:
Underground utilities shall be installed in accordance With the following
standards in addition to other criteria:
a.No more than 500 linear feet of trench may be opened at one time.
b.Excavated material shall be placed on the uphill side of trenches
c.Effluent for dewatering operations shall be filtered or passed In
approved sediment trapping device, or both, and discharged inmanner
that does not adversely affect flowing streams or offsite property.
d.Material used for backfilling trenches shall be properly compacted in order
to minimize erosion and promote stabilization.
e.Restabilizotion shall be accomplished in accordance with these regulations.
I. Applicable safety regulations shall be complied with.
17.CONSTRUCTION ACCESS ROUTES:
Where construction vehicle access
r outes intersect paved public roads,
10Where sediment is t
provisions shall be made to minimize the transport of sediment by vehicular
tracking onto paved surfaces. ransported on to a
public road surface, the road shall be cleaned thoroughly at the end of
each day. Sediment shall be removed by shoveling or sweeping and
transported to a sediment control disposal area.
Street Washing shall be
allowed only after sediment is removed in this m This provision shall
apply to individual lots as well as to larger land disturbing activities.
18. TEMPORARY E&S CONTROL MEASURE REMOVAL:
l
All temporary e u
and sediment control m shall be removed
within 30 days after fin site stabilization or after temporary measures are
no
anger needed, unless otherwise authorized by the local program
authority. Trapped sediment and the disturbed soil a esulting from the
disposition of temporary measures shall be permanently stabilized to prevent
further erosion and sediment.
19. ADEQUACY OF RECEIVING CHANNELS:
Properties and waterways downstream from the development site shall be
protected from sediment deposition, erosion and damage, due to increases
in volume, velocity and peak Flow rates of stormwoter runoff for the stated
frequency storm of 24-hour duration.
1 U XL Sump
No.4 183
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STOCKPILE —------___ — — —
_
24
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I I I I � I 1 / � j l , � z I 1 / / / ,r ,� � A / ,�' y -� / "y F / °� I II ♦ \ / �'�— __ �_�-, _________________________ _______ _
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w� wa,4e0 N > 'o ,0 4 > m $ \ \; �\ I 1 1 0l\ to I ° � � I \ , I mm➢N / c� I � �'/i'i'/ / � O /
Lu
LOT
I
I \ \\;\ \ � ♦ \\ � \ =\ \ `\ � � `Jim\ \ � � � / '
--- % I PRESERVED SLOPES LL
__ 440— — — _ _ — — / Z �1 LL
\
___-___
--__-------------- ;: � LEGEND W
IL �.. PAVED DITCH i , /
4/6 oti /r t TATE /ROUTE 631 0 /� SOIL TYPE BOUNDARY O m
��\ / 1 RIO OAD EAST V
3� RUNOFF FLOW DIRECTION
PRESERVED SLOPES (/ \\ q W
SURVEYED , 25%
`'o� Date
09 23 2019
Scale
1" 30'
NN- Sheet No.
30 0 30 60 90
C8 OF 15
Scale: 1 "=30' File No.
16.009
/
J 9
y °
\
/ INSTALL INLET
° I cBASE & IRISER.
/ I I ° COVER TOPS.
( YR.) /4 ,
-�
j
I 7D
/%' o °I / S �� DD c
o
W
9?.�1 11 1 -{ \ I\ � \I ° \ t \ \\ \ ° \\ c'o \\ \\ `G� \\ \ — — — 430� i � \ / �w �w — _ DD Ci
(,(jK� w R
w m m \ \ \ �'�l \\\ l I \ \ \ \ \ o I I O�'",�' �A I • WSA WL
SEQUENCE OF CONSTRUCTION - STAGE 1
1.INSTALL CONSTRUCTION ENTRANCES OFF RIO ROAD AS SHOWN. INSTALL SILT FENCE SHOWN.
2. INSTALL STORM SEWER "SECTION A". REFER TO C14 FOR OFFSITE STORM.
3. WHEN OFFSITE STORM HAS BEEN INSTALLED, INSPECTED, AND STABILIZED, REMOVE
CONSTRUCTION ENTRANCE ON PARCEL A1A.
3. INSTALL DIVERSIONS, SILT FENCE, INLET PROTECTION, & SEDIMENT BASIN.
4. CONTACT DESIGN ENGINEER AND THEN COUNTY INSPECTOR FOR INSPECTIONS.
5. WHEN ALL PARTIES HAVE APPROVED FIELD CONDITIONS, BEGIN MASS GRADING, STARTING AS
SHOWN ON THIS SHEET.
6. MAINTAIN PERIMETER CONTROLS DURING TRANSITION INTO STAGE 2.
SOIL EROSION & SEDIMENT CONTROL SYMBOLS
SYMBOL v0. TITLE I -
3.02
CONSTRUCTION ENTRANCE
CE
3.03
CONSTRUCTION ROAD STABILIZATION
CRS
—x —x —x —x
3.05
SILT FENCE
SF
®
3.07
INLET PROTECTION
IP
3.09
TEMPORARY DIVERSION DIKE
DD
[DRAWN TO SCALE]
3.13
TEMPORARY SEDIMENT TRAP
ST
wzgm
3.18
OUTLET PROTECTION
OP
T$
3.31
TEMPORARY SEEDING
TS
P$
3.32
PERMANENT SEEDING
PS
�--��
3.35
MULCH
MU
DC
3.39
DUST CONTROL
DC
SAFETY
FENCE
TREE PROTECTION FENCING
LIMITS
OF DISTURBANCE
Q
QF
19
/
/
/
/
CONTRACTOR SHALL
ENSURE RIGHT— OF WAY
SEQUENCE OF CONSTRUCTION - STAGE 2
1. MOVE CONSTRUCTION ENTRANCE TO NEW LOCATION SHOWN ON THIS SHEET AFTER STAGE 1
AREA IS GRADED.
2. INSTALL ADDITIONAL PERIMETER CONTROLS AS SHOWN AS GRADING PROCEEDS. CONTACT DESIGN
ENGINEER TO INSPECT AND CONFIRM PROPER INSTALLATION.
3. INSTALL UTILITIES AND GRADE ROAD AREAS.
4. MASS GRADING SHOWN ON THIS SHEET REPRESENTS INTERMEDIATE GRADES AND CAN BE
ADJUSTED IN THE FIELD.
5. MAINTAIN SEDIMENT BASIN UNTIL ALL UPSTREAM AREAS ARE STABILIZED. CONTACT BOTH DESIGN
ENGINEER AND COUNTY INSPECTOR BEFORE BASIN IS REMOVED.
SOIL EROSION & SEDIMENT CONTROL SYMBOLS
SYMBOL v0. TITLE I -
3.02 CONSTRUCTION ENTRANCE CE
3.03 CONSTRUCTION ROAD STABILIZATION CRS
� I
SHED "� / / / / / — X —X —X —X 3.05 SILT FENCE SF / / s I I 1�
o � DIVERSION IS PROPERLY �
`)
S _ MAINTAINED AND VERIFIED
FUNCTIONAL AFTER ® 3.07 INLET PROTECTION IP
EVERY WORKDAY
CONTRACTOR w
LAYDOWN/
STORAGE AREA
3.09 TEMPORARY DIVERSION DIKE
DD
^ m w
19
\ l
''
DD e
C1
[DRAWN TO SCALE]
3.13 TEMPORARY SEDIMENT TRAP
PLY
l
Q
DC
k
3.18 OUTLET PROTECTION
m
POWER I/.
\POLE VI ✓
/ -Y( / /."
k
/
TS
3.31 TEMPORARY SEEDING
TS
m u
3.32 PERMANENT SEEDING
PS
/ i (' .' li i
I IP / ( /'
/
, D i
/' / =2�,p,
\µ Fq j�
3.35 MULCH
MU
/\w_
D 8
C71 � j
p("`
3.39 DUST CONTROL
DC
nN��4�111,183
\—\\WwSAFETY
N�}T INSTALL LOWR
—DO
FENCE
\PARKINU�G UNTIL ALL \
RREI 4STABIU HE
\ —_ _ �w w Tw �w
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TREE PROTECTION FENCING
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LIMITS OF DISTURBANCE
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STOCKPILE I I —"_____--__— — ' ______ � _____ �
4
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PHASE 2
�4
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5
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430-- _ _ =___________________ }i -�� l IL
LO
------------------------- \ Dace
09 23 2019
\ \ \ —
Scale
1" 30'
so o so so so Sheet No.C9 OF 14
Scale: 1 "=30' File Na.
16.009
SEQUENCE OF CONSTRUCTION - STAGE 3
1. INSTALL SILT FENCE WHERE NEEDED FOR ANY FINAL PERIMETER GRADING (PRIMARILY FOR
REMOVAL OF SEDIMENT BASIN AND DIVERSIONS ALONG THE PERIMETER)
2. AFTER SEDIMENT BASIN IS REMOVED, INSTALL STORMTECH BMP AND LOWER PARKING AREA. DO
NOT INSTALL STORM CARTRIDGES UNTIL SITE HAS BEEN ENTIRELY STABILIZED AND SYSTEM HAS
BEEN CLEANED OUT.
3. WHEN SITE HAS BEEN STABILIZED, HOUSE CONSTRUCTION MAY BEGIN.
4. DURING HOUSE CONSTRUCTION, AREAS THAT ARE NOT BEING DISTURBED MUST REMAIN
STABILIZED. INSTALL SILT FENCE PROTECTION FOR LOTS UNDER CONSTRUCTION.
5.IMPORTANT: RAIN GARDENS SHALL BE INSTALLED LOT BY LOT. DO NOT INSTALL RAIN GARDENS
UNTIL EACH RESPECTIVE HOUSE HAS BEEN CONSTRUCTED. THE RAIN GARDEN UNDERDRAINS
SHALL BE CONNECTED TO THE STORM DRAINS WITH INSERTA-TEES AS THE FINAL STEP OF LOT
SOIL EROSION & SEDIMENT CONTROL SYMBOLS
SYMBOL v0. TITLE I
3.02 CONSTRUCTION ENTRANCE CE
3.03 CONSTRUCTION ROAD STABILIZATION CRS
SHED i % C1 / \4 CONSTRUCTION. CONTACT DESIGN ENGINEER FOR INSPECTIONS OF THE RAIN GARDENS. x —x —x —x 3.05 SILT FENCE SF 1�
Ilk/
6. DO NOT INSTALL BIOFILTERS UNTIL ALL UPSTREAM AREAS ARE PERMANENTLY STABILIZED. IP
`)
• / _/ i i / \ 'r ' {\I/ �• 0 3.07 INLET PROTECTION
/ / / \ ,/ - / J PHASE 3 ® �1
] / / / STOCKPILE
o �
m °
I �
n z
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w
a z
a5
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Irv/ i / i / � v / / / / / ; 11 r' / - - A DRAWN TO SCALE] 3.13 TEMPORARY SEDIMENT TRAP
lo
3.18 OUTLET PROTECTION OP rc
N4
�m
ye 3 / i /x �w T$ 3.31 TEMPORARY SEEDING TS
v
w t v 11 en
3.32 PERMANENT SEEDING PS
/ I ' ' /III /P \ I l i / , rs i/ //1'�. // C,�• w\
3.35 MULCH MU
3.39 DUST CONTROL DC
.
SAFETY FENCE v IL SHIMP
�w—w .e 10a. 4
x -` \ TREE PROTECTION FENCING
LIMITS OF DISTURBANCE SSRNr^T 4
--
1
a m d V I A V A A v Vo C7 A I A 44
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\ _ \ -- � I IF \ \ 1 •1 I \ I O��" �54_ \ 4\ oa l ./ 1 d l � / I � TW
V A \ V \IAIII V v \ / A 1 6 '�="'_;-',_, _ 'I+� A V :, I I \ I I 1 --_• cur :� �Yz �w
\III "Oo
400-v—w "V
4 v ` V �: o ` • l 1, A / &" $ �� � - w — w ^I
'� TORY
3 a\`� I a
- '// //'/� // // /IIII / \ \ � � / e ti6 /" 1 I I � I o,� I S $ � 1 / '� 4j - ,•` �' � � o
roy I � `�' w \
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3 STORY
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/
I 5 _
SI �DI
II l � �� � 1 / � � _- _ � `:>j>X� SIC I •� a I �£ _-3-sTaRr _ _ ��-___o��__- _- '�
III ose sF,- I
CgqMMON I 5 II I I j / / / )W/M// ' / / 1I II / " ' / '' �� - - % F• j /' - /i PHASE
STOCKP3E ieo sE --�
�
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I
76OF a .•�Tr / '—X�—�c
r -JI II II III I IfIII 11-�� /
w IIII I I I I � I I / / / I I / / I= c [ STORY 1r / /O C1 / :' {.: / s °w .5g i' � � �' s \ `
I II 1 I I \ �� 1\ II 1 / 0 6 •F �! f _ 7e6RSFTM/
/'K ' _ LL
I I I I 1 I 1 I V A I I A '\, 1 A V I �'� I 3 sroRv �. / 1 / ../ .r•' / ox� /
\ I 1 \ ]Oa sF 1 m / i•i.' , % oa y' o /
I I I I 1 1 1 I \ ` I'` I / I %/
w
COMMON HOUSE
/ C,: 0 ,.+ a \ \ 7b 1 ]
w c:� e w w 4 N o \ ��\ \\ 1 \ ,.6,6 SF
�^\ / ....'.'. -;'i:'":•::'' a I / / '' � /' /'
Lu
— — — — — — — i LL
PRESERVED SLOPES M _-
Z LL
____ __ ____-_� 440_ — _ — — _ / / Q l Q
_ _—_------
___--__ _--
�� -A`� __� _ _ — _ ____--- _
41p 41 / , / STATE/ROUTE 631
tP� / / 1 RIO OAD EAST J
-�3� > w Q
0
Date
09 23 2019
Scale
1" = 30'
30 0 30 60 90 Sheet No.
C10 OF15
Scale: 1 "=30' File Na.
16.009
420
415
00
405
400
395
390
385
380
CONSTRUCTION OF A SILT FENCE
(WITH WIRE SUPPORT)
1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS.
TRENCH UPSLOPE ALONG THE LINE
OF POSTS.
FLOW
NOTE: STR. A6 MANHOLE IS PERMANENT.
WHEN BASIN IS DEWATERED, USE PRECAST
RISERS TO BRING SIR. A6 INTO PERMANENT
CONFIGURATION PER DETAIL 4 ON C13.
TOP: 408.7
DESIGN HIGH WATER _f
(25-YR. STORM ELEV.) MIN. 2.0'
TOP: 406.0 MIN.�3.0'
MIN. 0.5'MIN. 1.0'
T I 411 RISER CREST= 405.0
C: WET TOP
67 C.Y./ AC.
"WET' STORAGE 6" DEWATERING
DEVICE. INV. 404.0
B: SEDIMENT
POINT
A: BOTTOM CONC. BASE
DESIGN ELEVATIONS WITHOUT
EMERGENCY SPILLWAY
(RIMER PAGGEG 25-YR. EVENT)
A
B
C
Riser
OA
Wet
Vol.
Wet
Vol. Cy
Dry
Dry Vol.
Cy
25 yT
Elev.
(Acs.)
(Req.)
(Prov.)
(Vol.Req.)
(Pro,)
WSE
400.0
402.0
404.0
404.00
4.00
268.0
645.0
268.0
274.0
424.00
SEDIMENT BASIN DESIGN TABLE
(,8 NOT TO SCALE
GRAVEL CURB INLET SEDIMENT
FILTER
I I �
GRAVEL FILTER
RUNOFF WATER WIRE MESH
FILTERED WATER
< a
SEDIMENT J III III a ; "
CONCRETE GUTTER 12" CURB INLET
420
415
410
405
400
395
390
385
Cyo
SPECIFIC APPLICATION
THIS METHOD OF INLET PROTECTION IS APPLICABLE AT CURB INLETS
WHERE PONYING IN FRONT OF THE STRUCTURE IS NOT LIKELY TO CAUSE
INCONVENIENCE OR DAMAGE TO ADJACENT STRUCTURES AND UNPROTECTED
AREAS.
• GRAVEL SHALL BE VDOT #3, #357 OR 5 COARSE AGGREGATE
3 INLET PROCTON P)
C11 Not To Scale
SAFETY FENCE
PERSPECTIVE VIEW
PERSPECTIVE VIEW PERSPECTIVE VIEW
PLASTIC FENCE METAL FENCE
SOURCE: CONWED PLASTICS
VDOT ROAD AND BRIDGE STANDARDS
VA. DSWC
(4:)SAFTY FENCE (SAF)
C13 Not To Scale
PLATE. 3.1-1
1992 3.35
Source: Va. DSWC
TABLE 335-A
ORGANIC MULCH MATERIALS AND APPLICA170N RATES
RATES:
MlJ1.CI-IFS.
NOTES:
Per Acre
Per 1000 sq. ft.
Straw or Hay
1 } - 2 tons
70 - 901bs.
Free from weeds and coarse
(Mioimum 2
matter. Must be anchored.
tons for
Spread with match blower
winter cover)
or by hand.
Fiber Mulch
Minimum
35 [bill.
Do not use as mulch for
15001bs.
winter cover or during hot,
dry periods.' Apply as
slurry.
Co. Stalks
4.6 tons
185 - 27516s.
Cut or shredded in 4-6"
lengths. Air-dried. Do not
fine turf areas. Apply
win
with mulch blower or by
hand.
Waad Chips
4 - 6 tons
185 • 27S lbs.
Free of ware matter. Air-
dried. Treat with 12 Its
nitrogen per ton. Da not
use in fore turf areas. APPLY
with mulch blower, chip
handler, or by hand.
Bark Chips
50 " 70 err.
1-2 C11. yds.
Free of coarse matter. Air -
or
yds.
dried. Do not use in Suer
Shredded
turf areas. Apply with
B
5 MULCHING MU
C11 Not To Scale
TABLE 3.39-A
ADHESIVES USED FOR DUST CONTROL
Water
Application
Dilution
Type of
Rate
Adhesive
(Adhesive: Water)
Nozzle Gallons/Acre
Anionic
Asphalt Emulsion
7:1
Coarse Spray
1,200
Latex Emulsion
12.5:1
Fine Spray
235
Resin in Water
4:1
Fine Spray
300
Acrylic Emulsion
(Non -Traffic)
7:1
Coarse Spray
450
Acrylic Emulsion
(Traffic)
3.5A
Coarse Spray
350
DUST CONTROL (DC)
C11 Not To Scale
TAeLa s�rc
r'FMPDRARV SEEDDJG PI.AN'f MArTRIA1S, SHPDmG RAr'6, AND DATFS
9
SPECIFS
SEEDING MT5
NOR1N'
SOUTH'
uNT
CHARACTERISTICS
Ate.
1aao AT
r"wa. Hsy
d,.lay io �m lm..
1
-
uw Tlaa.amiw U.e.. xaem).
aac�o
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mi� .�.
a�maau�
wsvvR+c
6 r�M�
� sl0. mrwk vii.. uy a
NonMm Neanwnr vq MWnYin region. Sm Nm 3.33�1 aM S.Y2-2.
Sauaiem Piedmont uAGmml Plain.
�y per urEcaomrcmP wilg spung wMing.
% MaY a PlanleraMiwsn Nee dems.l MNing.
Mar am l,e Nanmd smxn 1� sue,.
TEMPORARY SEEDING (TS)
C11 Not To Scale
TEMPORARY DIVERSION DIKE
Compacted Soil
18" no
I -Flow
4.5' min.
DIVERSION DIKE (DD)
C11 Not To Scale
I':�%al/ZKII��ICY/Y.i/IAUY[IlJ/aIJ/IY.�1�7AI�1
STONE �70' MIN.
CONSTRUCTION
ACCESS 3" SM-2A ASPHALT TOP
COURSE EXISTING
2R 2R PAVEMENT
�5' MIN. 21A AGGREGATE BASE
PROFILE
STONE 70' MIN.
CONSTRUCTION ASPHALT PAVED
ACCESS A WASHRACK
EXISTING
29, ® 2R PAVEMENT
2y, 12' MIN.•
'MUST EXTEND FULL WIDTH 1`10SITNE DRAINAGE
OF INGRESS AND EGRESS TO SEDIMENT
OPERATION TRAPPING DEVICE
PLAN
1�12' VIN. ToSE
DRAINAGE
29 TO SEDIMENT
TRAPPING DEVICE
FILTER CLOTH
SECTION A -A
A minbmuu water tap of 1 inch most be instatecl with a nmmmmr 1 inch ba8cock
slustoff r salve supplying a wash hose with a diameter of 1.5 inches for adequate
constant pressure. Nash water mast be carried away from the entrance to an
approved Refill area to remove sediment. All sedune t shall be pre cited from
entering storm drains, ditches m watecomi, s
PAVED WASH RACK
NO SCALE
To Scale
PERMANENT SEEDING SPECIFICATIONS
February 16 through April 30:
Kentucky 31 Fescue - 128 Ibe/acre; Red Top Grass - 2 Ibs/acre;
Annual Rye - 20 Ibs/acre. Add 20 be/acre Indian grass when slopes
are greater than 3:1.
May 1 through August 15:
Kentucky 31 Fescue - 128 Ibs/acre; Red Top Grass - 2 be/ocre;
Millet - 20 Ibs/acre. Add 20 Ibe/acre Indian grass when slopes
are greater than 3:1.
August 16 through October 31:
Kentucky 31 Fescue - 128 Ibs/acre; Red Top Grass - 2 Ibs/acre;
Annual Rye - 20 Ibs/acre. Add 20 Ibs/acre Indian grass on slopes
greater than 3:1.
November 1 through February 15:
Kentucky 31 Fescue - 128 Ibs/acre; Red Top Grass - 2 Ibs/acre; Winter
Rye - 20 Ibs/acre. Add 20 Ibs/acre Indian grass on slopes greater
than 3:1.
MULCHING SPECIFICATIONS:
Straw or hay at a rate of 2 tons/acre. Must be anchored. Spread with
mulch blower or by hand.
LIME AND FERTILIZER SPECIFICATIONS:
Lime and fertilizer needs should be determined by soil tests. Soil tests
may be preformed by the Cooperative Extension Service Soil Testing
Laboratory at VPI&SU, or by a reputable commercial laboratory.
Information concerning the State Soil Testing Laboratory is available from
CITY Extension Agents. Under unusual conditions where it isnot possible
to obtain a soil test, the following soil amendments will be applied:
For Permanent Seeding: Seeded areas shall be limed at a rate of 2 tons
per a and fertilized at a rate of 1,000 as. per acre of 10-20-10 (10
lbs. per
e 1,000 square feet) o equivalent.
For Temporary Seeding: Seeded a as shall be limed at a rate of 2 tons
per ac and fertilized at a rate rof 600 Ids. per acre of 10-20-10 (10
Ibs. per e 1,000 square feet) or equivalent.
10 PERMANENT SEEDING PS
C11 Not To Scale
► v XL SILIIMP
Na.4 !83
ESSRMAL 4
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1
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Data
09 23 2019
Scale
Sheet No.
C11 OF15
File No.
16.009
m
II
_CTIDN A A �p°`uriT,' we * .ram
IF TREATMENT IN DROP INLETS
E.
PLAN
METHOD OF TREATMENT N MANHOLES
,per STANDARD METHOD OF SHAPING
MANHOLE & INLET INVERTS
TEMPORARY SLOPE DRAIN
EARTHEN DIKE PROVIDE INLET
CORRUGATED MEFAL (COMPACTED) PROTECTION
EXTENSION COLLAR
WATERPROOF SEAL
PROVIDE OUTLET A
FPROTECTION STANDARD FLARED END SECTION
I
SECTION VIEW
NOTE: SEDIMENT MAY BE CONTROLLED AT OUTLET IF UPLAND PONDING
WILL CREATE PROBLEMS
EARTHEN DIKE
(COMPACTED) 3.1
1 I I
I I I II II -
��IIIIII�IIII � IIIII 111111=
SECTION A - A
L
SECTION A -A
w.. rr z�xoowr amE¢r°x�oTi —A- 2S m—M °b6 a
SECTION B-B
- -,
w wxa TYPIC& PRECAST IMF
TYPICAL CONCRETE SAFETY SLAB FOR DROP INLETS,
o. MANHOLES AND JUNCTION BOXES
GRAVEL AND WIRE MESH
DROP INLET SEDIMENT
FILTER
FILTERED
WATER
* GRAVEL SHALL BE VDOT #3, #357 OR #5 COARSE
AGGREGATE.
(a)DROP INLET PROCTION DIP
�12 Not To Scale
Entrench
Width - Matting 6"
Matting
III -I a II -II
Depth
a TYPICAL DITCH SECTION DETAIL
C 8 Not To SCale
V[
C(
TEMPORARY RIGHT-OF-WAY
DIVERSIONS
TYPICAL GRAVEL STRUCTURE
(a)TEMPORARY SLOPE DRAIN (AS NEEDED) RIGHT OF WAY DIVERSION
C12 Not To Scale C12 Not To Scale
°
C11 r C 1
(j) /
/ /
// /
/
I
I io
//o
°
/ i/°
\\
/
°
° V A
A v A
1✓11
o I \
V A
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/// ///
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SEDIMENT BASIN PLAN VIEW
�12 SCALE: 1"=20'
PIPE OUTLET CONDITIONS
A A
A
ado A 3do(MIN.)
do
PIPE OUTLET TO WELL
PLAN VIEW DEFINED CHANNEL
PIPE OUTLET TO FLAT PLAN VIEW
AREA WITH NO DEFINED 1
CHANNEL
L o
d
SECTION A -A FILTER CLOTH KEY IN - OR ENTIRE PERIMETER
NOTES: 1, APRON LINING MAY BE RIPRAP, GROUTED RIPRAP RECOMMENDED
BASKET, OR CONCRETE.
2, La IS THE LENGTH OF THE RIPRAP APRON AS CALCULATED
USING PLATES 3,18-3 AND 3,18-4.
3. e = 1.5 TIMES THE MAXIMUM STONE DIAMETER, BUT NOT
LESS THAN 6 INCHES.
Q10
(cfs)
La
(ft)
Do
(ft)
3Do
(ft)
d50
(in)
depth
(in)
Outlet
Condition
Al
18.77
9.0
2.00
6.00
9.0
12.0
Channel
OUTLET PROTECTION TABLE (OP)
C12 Not To Scale
Ln:+I�nme
SNOW FEN
BOARD FEN
► y
SM
P4!�8�
`�sSrtTrrn
q
v
W
LL
O
CORD FENCE
CORRECT METHODS OF TREE FENCING
.w" CORRECT TRUNK ARMORING
r+t
TRIANGULAR BOARD FENCE
TREE PROTECTION FENCING
C12 Not To Scale
v m°
405 405 415 415 420 AS A6 A] 420 V w
400 " 00 410 410 3
— 405 405 475 — 415 3 w
395 ~ 395 405 — _ 405 o 2
a°0 400 _ aia aio ""�I I
390 390 400
405 405
395 — 395 N
385 — ,V 385 395 — 395 W
390 390 400 — 400
380 380 390 — 390 m
385 385 395 = = 395 N
375 — 375 385 0 00 — 385 Q
>
-- 390 390 w +
10+00
370 0 _ 370 380 10+00 9 zZ 10+50 11+00 11+5U0
>
STORM PROFILE A5-A5C STORM PROFILE A5A-A5Z 85 65
365 365 C13 130' " = 30' �q w o
3e0 10+00 10+50 11+00 11+5b80 �y
360 360 x 81 m U
0 mLL STORM PROFILE A5-A7
355 355 Ci C2 C13
1"=30'
425 425 41 a
350 350
420 `` 420 410 —
345 345
C24�j
415 415 405 40 340 410 410aoo NOTE: CONCRETE INLET SHAPING335 33s(IS-1) REQUIRED ON ALL STRUCTURES
40� <10+00 - 1o+5tl5 395 10+0o m+w WITH A 4' OR GREATER DROP AND
0 0 —
�STORM PROFILE Cl-C2 SAFETY SLABS (SL-1) ON ALL
��99 STORM PROFILE Al -A5 STRUCTURES TALLER THAN 12'.
325 10+00 10+50 11+00 11+50 12+00 12+50 13+00 13+5U5 C13 1" - 30' C13
STORM PROFILE Al -A5
C13 1"=30'
455 455 435 435 445 445
450 WEE 450 430 430 440 440 o
445 445 425 425 435
440 440 420 ' 420 430
435 435 415 ga 415 425 425
430 — 430 410 _ 410 420 — 420 Cl,
425 -- 425 — — — ap
405 10+00 10+50 11+00 11+50 12+00 s a1s 10+00 10+50 11+00 11+50 12+0F
42
420 8 STORM PROFILE B2-F1 9 STORM PROFILE G1-G2
C13
415 p 415 L.
440 440 ��QV11
410 = 410 ��\1
435 435 430 430
405 405 _ —
400 430 430 425 425
400 00 > -- 10+50 11+00 11+50 12+00 12+50 13+00 13+50 -
-15+00 425 425 420 420
STORM PROFILE B1-B6 -
C13 1" = 30' 20 — 420 415 415
415 415 410
410 `O
4]0 470 410 3 _ 410 405 405
465 _ 465 > 405 0
ap y
— — — _ �10+00 z�pFyp> 11+00 11+50 12+00 12+50 5 400 1p+00 10+50 11+p00]
460 _ - - 460 10 STORM PROFILE B2-E3 ril STORM PROFILE J1-J2
455 455 I1O
450 — 450 4]0 4]0 470 470 LL
445 _ 445 465 465 465 465 ^� '��`��\111QQQ111
440 440 460 — 460 460 — 460 LL
Lu
435 _ 435 455 455 455 455 L O
430 430 450 450 450 450
yy99 — ¢y5 Date
425 I +00 10+50 11+00 11+50 12+00 12+50 13+00 13+5U5 415 1 +00 10+50 11+00 11+5v 1U+00 z z 10+50 11+01415 09 2 3 201 9
(a)STORM PROFILE B5-H2 (a)STORM PROFILE 11-13 14 STORM PROFILE 12-IA2 Scoe
C13 1" = 30' C13 1" = 30' C13 1" = 30'
Sheet No.
C13 OF15
File No.
6 09
COUNTY OF ALBEMARLE
y - Department.1 C...nunly Development
Construction Record Drawings (As -built) for VSMP
The following is a list of information required on construction record drawings for
stormwater facilities (reference Water Protection Ordinance 17-422). It is preferable that the
construction record drawing be prepared by someone other than the designer. Please do not
provide design drawings as construction record drawings.
A. A signed and dated professional seal of the preparing cnginarr or surveyor
B. The name and address of the firm and individual preparing the drawings on the title sheet.
C The mosbucled location of all items associated with each facility, and the inspection records to verify
proper dimensions, materials and installation. The items include, but are not limited to the following:
1- inspection Records and photographs for pipe trenches and bedding, including underdrains-
2. Video Pipe Inspection fur any pipes which are not accessible or viewable.
3. Updated Location with geo-coordinale oral[ facilities-
4. verlfred Drainage Area maps forthc drainage area treaw4 and for drainage to the facil ies.
5. Current physical and topographic survey forall earthen structures. Ponds should include a survey
of the pnird bottom. Surveys should verify pond volumes are per&sign. Corrections maybe required
fur slteraitons from the design.
6. Plants. location and type.
7. Plans and profiles far all culverts, Pipes, Rlwn, Weirs and Drainage Structures - Display the
installed lype of drainage structures, culwolpipe size, -airs, materials. inlets or end tmalment(s),
inlet and nodal protection, alignment and invert elevations compared to design-
s. Computations: For significant deviations from design, provide "ed computations vUTifying that
the as -built condition is equivalent orbe[ter than design.
9. Ditch Linos - Display the colstiucied location of all dirch lines and channels, inctuding typical
sections and linings.
10- Easements - Show all planed easements with dead book references labeled, Facilities and drainage
must he within Planed easement. Provide copies of roctwded documents.
11. Guardrail, fences or other safety provisions - Display the constructed location of all safety
provisions; ferules, guardrail, including the type, length and applied end treatments, compared to
design.
12. Material layers - biotilrer media, stone layers, sand layers, keyways and cores must be verified as to
material types and depths. Include inspection reports, haring or test pit reports and materials
certifications. Biofdler media must be an approvod stale min.
13. Access;roads - show location of access roads, surface treatmenk drainage, etc, as applicable.
14. Compaction reports are required to verify fill cumpaction in dams.
15. Manufacturers certificatlons for pmprielary BMP's certifying proper installation and !'unclioning.
1)
R SPIKE
349.12'
I
/
A
455
450
445
440
SEWER CONNECTION THROUGH TMP 61-210B
C14 1' = 30' J
o rn
2
Z
O
nBIOFILTER C1 PLAN
C14 1"=20'
ZllTJI�iYV
� r
IYirYllhi[I� QI`I�Bi�
fiiClaE071dEE0EErtl'Y1'EYa`7MP"au7EEEEEO�OWCWCOEpNECWCOEpy tPuy Sy 1y7L�1313tfailfi
_ �ilt�tli
-- -- - - •"" ' 1.11.E W LI. • ..:y.;
�at�[LSiIt7IiL[:l�elfi���lS>�11�R�.t41 '
sr r r ti
nBIOFILTER C1 PROFILE
C14 1"=20'
1-YR WSE=441.42
10-YR WSE=445.59
25-YR WSE=446.10
lb v
\ `q
///�/ III1111�'ll�l I I II 11i �I
OFFSITE SANITARY SEWER BY OTHERS.
30 0 30 60 90
Scale: 1 "=30'
_F—
l � rim
. 0 I
.0 y -
� � o
nBIOFILTER C2 PLAN
C14 1" = 20'
FILTER MEDIA: 175 SF X 3.0' DEPTH.
PEA GRAVEL: 175 SF X 0.25' DEPTH.
q57 STONE: 175 SF X 1.75' DEPTH.
46$, El. 24" HOPE RISERI
OBSERVA
WELL &
—A
NUT
EfFi
"1'6+00 ® 411.30
L6. SCHEDULE 40
PERFORATED PVC
INV. 413.500
(3:)BI0FILTER C2 PROFILE
C14 V=20'
, O M. SHIMP
III Ida. 4 ! 83
� 1o�25I�I
Ca, (C
FSgIU�AL 4
i
EL25
D BY 6"X6"
SEAL WITH
SABLE LINER.
420
1ED PEA 1-YR WSE=413.51
FILTER B/W 10-YR WSE=413.91
k SOIL MEDIA 25-YR WSE=414.17
415
RIC
OF
ONLY
I0+50N10
0
o
0
ewama wsxax
sw.x sxaxua uc swopI Owl 1—
m-
wo[xeeon.
Nunesamxa O
BMP D REQUIRED WATER
QUALITY VOLUME
— TV FROM VRRM
4595 CF REQ.
4665.16 CF PROVIDED.
18" HDPE
s, \
yq
STORM
BMP D: ADS BAYFILTER W.
s
pP� 90 BE
STORMTECH CHAMBERS
TREATED AREA: 0.78 AC
5 WEIR B
UNTREATED AREA + 2.61
R A TOP=410.0
AC AREA FROM BMPS A,
TQP=409. e1
B,&C
—
x2
I 18' HDPE TOR
8'x6' PRECAST
1
CONC. VAULT
W. BAYFILTERS
/ 4'x4' PR CAST C NC
I JUNCTIO BOX
STORAGE R W
INV=407.0
I
I
I ISOLATO ROW
INV=40 .00
80 LF 6"
I
SHEDULE 40
PERE. PVC
UNDERDRAIN
INV. 405.5
BEDDI G ® 81' 20'.
i BOTT =404. 0
I
TOP= 13.00
I
I
I
I
I
OUTLET C
I INV=4 9. 3
II
C1 4' MH—
/Q
0��
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0
I
I
I
BMP DETAIL: ADS BAYFILTER W. STORMTECHDETAIL: ADS BAYFILTER W. STORMTECH
1�1C1 SCALE: 1 '=20'
PROJECT INFORMATION
LLLLLLPK-li
ADVANCED DRAINAGE SYSTEMS, INC.
ECOVILLAGE
CHARLOTTESVILLE, VA
MC-045000 STORMTnECCH CHAMBER SPECIFICATIONS
Rr
BAYSAVER BAYFILTER SPECIFICATIONS oaaa
At'sr, ff] ff,
oxAPq p�a�
1MPORTNTgNOTES EBIDDING
I FOR THE BIDD,NG9ANU INSTALLATIONOFF �sM�Cd5�0 CHAMBER SYSTEM
T.
NOTES FOR CONSTRUCTION EQUIPMENT'
SAVroIµTE�R ManssgoRAwsCTosxgsamncs RswsaswnTxswugRowos roxw,m A6-Tor RswascurtRacTroswvam
L.
BAYFILTER INSTALLATION NOTES rogmswsxwxeer�crrxxoumwaomw uxowaRctouwn.
R OPOSEO LAYOUT arorus NOTES rixsxsw snrsx ros.ecncsnexxgrcsisxewsrwxrs.nxnvse xecesex.rrowraxocouws.nmriww.ws ro sTnxowo wwn«o
.xRaal ate'^^�wRx a,<waaR,.,a,�,aw,xagq�.wnru.na�,wa.aRaroTna Rar.�n�w�w.L�.nq�a.w�RaR w�a«:aq�aaxl�s4ro�.,aR=«uw,TnERarwn�n.w.u<a g
,w srsnx.RSR,x, imaaar.
», ar:rexgaxxE,ER,,, >
ROPOSED ELEVATIONS O
rasa nonsl —.. .. �d—_=ssv[n�newrin=� Mn uumwesE,sTcoR
n�iiusoo,rrogwxxacrwxs
v � t� l�xi9art clw�iwwnF�ow
R awn. an.�aR,wo o�ar� aR, w a aR nR TOP—<lo.00 R RwoTMaga,
3 of 7
a'�*°•a 1—YR WSE=406.49
to amerwx
10—YR WSE=409.73
crwsgn�cs 25—YR WSE=411.48
�a
I a xsnaucoxsua nq
tYoutlRwPE�
Im
SECl10N AA
aeaououD
I a I I
M
'F I
4GF7�
MATERIAL LOCATION
DESCRIPTION
AASHTO MATERIAL
CLASSIFICATION$
COMPACTION/ DENSITY REQUIREMENT
NOTES:
wscamvxn,el,csmrtxoxmovExcaoTamLEnu.wano >�vsxsxrwvsgloEscn[o
ttva.cqusxto. w,civA srox[wsasurags er sns ors�cxsxcwssgi
lsaswI—En.i C w..,—�
0
lcrw gsatossD—R-1 , m^1
A
* Ral l�n,mlxw ,ro,�txmml � � '�' a�nanaw�R.l,>ommlxw
°'o°" Pssxon al DEPTH OF STONE
BEDDING=12"
csasw.rxsTeseo+Txu.swvwceonxt� l
aleianoarousrwxnao r
O
pe o SU1nPPROpa�ErD ao1
xxRa,.,<oa,�>ngaPEwaw
MC4500 ISOLATOR ROW DETAIL
INSPECTION S MAINTENANCE uw
E.
p.
NOTESI A�emw.wovncr w.wxxuroRwxsx xsagsuwx wpwamaTxuxrexwu m,ECEaswv_gxavw,s
5 �
ogTxvw wagscTwnwwT
xusao sx•u.
axilxelF TOP s12-
� nrEco�w � tz•laaommlxw roR uxvnvsogrgL o , ! � !6
je
a nmmm,xw,wa,naaa1 acneow cwruxD �53�y8@
aronxrawcxuna 1 � sw _ I/E! R / 48
aromNT I �xaa wRaa is ��
aRw�oaoare�a, xaroaEEaa Ext�E,.En W, wT wa
PVC INSPECTION PORT DETAIL xx
4" I 7
Ma 6 OF 7ijij
► v XL SHIMP
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� 1o�25Ij
ES'S�OMAL 4.
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m
Date
09 23 2019
Scale
Sheet No.
C15 OF15
File No.
Section 5. Stormwater Management Plan
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
SHIMP
FNGINEERINGa
October 25, 2019
Engineering Review
Department of Community Development
401 McIntire Road
Charlottesville, VA 22902
PROJECT MANAGEMENT
CIVIL ENGINEERING
LAND PLANNING
Regarding: WPO 201900053 Eco Village VSMP — SWM Calculation Packet
Dear Reviewer,
o
J M. 5HIMP >
No. 4 181
`SSZONAL S,
VL4&�
Enclosed is the stormwater calculation packet for Eco Village. The development property has an area
of 6.53 acres, the development has a disturbance area of 5.90 acres. The project is a private redevelopment
of a site. The proposed stormwater design water quality requirements set forth in 9VAC25-870-65 and water
quantity requirements set forth in 9VAC25-870-66-B(4) and 9VAC25-870-66-C(3) (hereafter the 1 % rule" for
erosion and flood protection analysis)
This site is designed to include full onsite nutrient treatment per the Type IIB VRRM requirements. All
concentrated runoff from the site is conveyed into Meadow Creek to meet the 1 % rule.
SWM Quality
9VAC25-870-65 requires that the total phosphorous (TP) nutrient load created by the site
development be treated in accordance with the VRRM Redevelopment Spreadsheet reduction requirements.
To achieve nutrient treatment, several onsite BMPs will be utilized. These BMPs are sized per VRRM. Onsite
BMPs include: (38) Level 1 Mico-bioretention facilities (Rain Gardens), (2) Level 2 Bioretention Basins
(Biofilters), and (1) Manufactured Treatment Device BMP (ADS Bayfilter & Isolator Row). The required TP
reduction is 3.46 Ibs/yr. These BMP's provide a TP treatment of 3.66 Ibs/yr. This meets the nutrient treatment
requirement. As part of the site water quality requirements, 1.26 acres of the development's open space shall
be dedicated as VRRM compliant SWM Forest/Open Space held in perpetuity in a vegetated state. This
packet shows the BMP design calculations and the VRRM spreadsheet results.
SWM Quantity
9VAC25-870-66-B(4) and 9VAC25-870-66-C(3) require that concentrated runoff from developments
be analysed for compliance with channel protection and flood protection requirements until the point where
the contributing drainage area is less than or equal to 1 % of the channel's total drainage area. To satisfy this
requirement, all concentrated runoff from the site will be conveyed through the proposed new storm sewer
system to the discharge point at Meadow Creek. At the point of discharge, Meadow Creek has a total
drainage area exceeding 3,620 acres. The Eco Village site is 6.53 acres, and thus constitutes less than 0.2%
of that drainage area. This packet demonstrates the adequacy of the proposed system to that point.
Per Approval of SP201800016, the storm sewer and BMP's for this site must be adequate to manage
the 25-year storm without downstream flooding. As such, the storm sewer calculations (LD 229) and the BMP
hydraulic analysis (HydroCAD) include the 25-year runoff. The systems have been designed to this standard.
If you have any questions about this calculation packet please do not hesitate to contact me at:
keane(�shimp-enqineerinq.com or by phone at 434-299-9843.
Keane Rucker, EIT
Shimp Engineering, PC
16
HSG B/D
slim
47D
HSG A
47D
HSG A
°
° o
o HSG A
TURF
O _
\•\•
o
TURF •°—i HSG B ,
O — TURF '
HS .� •� G) soot
f
0
( 7
i raft'**, ° H A
STATE ROUTE 631
RIO ROAD EAST
ECO VILLAGE
PREDEV VRRM
MAP
PROPERTY AREA: 6.53 AC
WOODS AREA: 4.31 AC
HSG A: 3.24 HSG B: 1.07 AC
TURF AREA: 1.74 AC
HSG A: 1.12 HSG B: 0.62
IMPERVIOUS AREA: 0.48 AC
HSG A: 0.36 AC HSG b: U.12 AC
�V�
16
HSG B/D
SHED
47D
HSG A
TURF
TURF
47D
HSG A
70
7
RF
If TURF
o °
O
1 /
HSG B°
HS
° TURF low00 TURF
ATE ROUTE 631
RIO ROAD EAST
ECO VILLAGE
POSTDEV VRRM
►yi /_1
PROPERTY AREA: 6.53 AC
WOODS AREA: 1.26 AC
HSG A: 1.26 HSG i : 0 AC
TURF AREA: 3.00 AC
HSG A: 1.81 HSG B: 1.19
IMPERVIOUS AREA: 2.27 AC
HSG A: 1.65 AC HSG B: 0.62 AC
I�
W
ECO VILLAGE
BMP DRAINAGE
MAP
DA A: LEVEL 1 RAIN GARDENS ALONG PERIMETEF
0.84 AC TOTAL (0.36 AC TURF, 0.48 AC IMP)
TV = 1893 CF. 23 RAIN GARDENS PROVIDED.
TYP. TV PER GARDEN = 83 CF
DAB: LEVEL 1 RAIN GARDENS INTERIOR AREA.
0.76 AC TOTAL (0.39 AC TURF, 0.37 AC IMP)
'
TV = 1508 CF. 15 RAIN GARDENS PROVIDED.
TYP. TV PER GARDEN = 101 CF
DA C: LEVEL 2 BIOFILTRATION BASINS.
1.00 AC TOTAL (0.77 AC TURF, 0.23 AC IMP)
TV = 1327 CF. 2 BIOFILTERS PROVIDED.
TO BIOFILTER Cl: 0.76 AC TOTAL (0.55 AC
r
TURF, 0.21 AC IMP) TV = 1105 CF
TO BIOFILTER C2: 0.24 AC TOTAL (0.21 AC
TURF, 0.03 AC IMP) TV = 225 CF
_-
/ -
DA D: ADS BAYFILTER W. STORMTECH
CHAMBERS @ 70% TP REMOVAL.
0.79 AC TOTAL (0.15 AC TURF, 0.64 AC IMP)
TV = 2289 CF FROM DA D. BMP
------ '
MUST ALSO TREAT REMAINING RV FROM
BMPS A-C: 2306 CF. DESIGN TV = 4595 CF
DA E - AREA NOT TREATED
I 0.47 AC TOTAL. (0.14 AC
/
TURF, 0.33 AC IMP) NO TV.
I \ 1
4fa 0-
Aft
WTI
0_ f4,F
�% ►_ /fir ���,/,
wo
631
Project Na':
ECO VILLAGE
Date: 9/18/2019
Linear Development Project? No
Information
-Development Project (Treatment Volume and Loads)
Enter Total Disturbed Area (acres) 5.90
IPre-ReDevelopment Land Cover (acres)
■
1 I
Post -Development Land Cover (acres)
A Soils I BSoils CSoils DSoils Totals
��--®
Area Check
® data input cells
onstant values
calculation cells
...Check:
BMP Design Specifications List: 2013 Draft Stds & Specs
Linearproject? No
Land cover areas entered correctly?
Total disturbed area entered? ./
- roresvrrpen spare areas muse oe Pmrecrea
nstants
rn acro.m wan me errgmro
rtunop rteaurnor rwerroo
Runoff Coefficients (Rv)
lua l RamN ll(mches)
1
Volls
BSoils
DSoils
;et Rainfall Eyent(inches)
1.00
Lmst/Open Space
0.02
0.03
MO;
0.05
al Phosphorus (TP) fMC (mg/L)
0.26
Managed Turf
0.15
0.20
0.25
al Nitrogen(TN) EMC(mg/L)
1.86
Impervious Cover
0.95
0.95
0.95
Land Cover Summary -Pre
Lord Cover Summary -Post (Firm
Post ReDev.&New Impervious
Fores1/0'acrep)Ce Cover 1.26
Weighted Rv(fi.00t) 0.02
%Forest 19%
M... g; cT. fCover 3.00
Weighted R,(Wf) 0.17
%Managed Turf 46%
Impervious Co (acres) 2.27
Rv(impmms) 0.95
%Impervious 35%
Final site Area (acres) 6.53
Final Post Dev Site Rv 0.41
Final Post -Development
Pre-ReDevelopment
Listed
Adjusted`
Forest/Open Space C.-(acres)
4.31
2.52
Weighted Rv(forest)
0.02
0.02
%Forest
66%
53%
Managed Turf Cover (acres)
1.74
1.74
Weighted Rv(turf)
0.17
0.17
%Managed Turf
27%
37%
mpe,ms C.-(acres)
0.48
0.48
Rv(impe ms)
0.95
0.95
%Impervious
7%
10%
Total site Area (acres)
6.53
4.14
Site Rv
0.13
0.17
Treatment Volume and Nutrient Load
Pre-ReDevelopment Treatment Volume
(scre-ft)
0.0704
0.0670
Treatment Volume 0.2243
(a-ft)
Final Port-Developmen
Treatment Volume9,769
Pre-ReDevelopment Treatment Volume
(cubic feet)
3,067
2,919
(cubic feet)
Final Post-
Pre-ReDevelopment TP Load
1.93
1.83
Development TP Load 6.14
(Ib/yr)
(lb/yr)
Final Post -Development TP
Loatlp lope 0.94
(Ib/acre/yr)
Pre-ReDevelopment TP Load per acre
(Ib/acre/N)
0.30
0.39
Basel l ne TP Load (lb/yr)
(0.4116s/acre/yrapplied to pre -re development ar excluding pervious
1.94
land proposed for new impervious cover)
Idjusted Lord Cover Summary:
x ReDevelopment Ipnd rover minus pervious land cover (forest/ Per space or managed
'rf) acreage proposed for new impervious cover.
Ijusted WWI acreage is consistent with Post-ReDevelopment Pcrepge(minu, acreage of
.w impervious cover).
rlumn (shows load reduction requrlementfornew impervious cover(bosed on new
-lopment lord limit, 0.41 Ibs/acre/year).
Land Cover Summary -Post
Post-ReDevelopment
Foresl/Open SP)'m
Cover (acres)
1.26
Weighted Rv(forest)
0.02
%Forest
27%
Managed Turf Cover
(acres)
3.00
Weighted Rv(turf)
0.17
%Managed Turf
63%
ReDev. Impervious
Cover(acres)
0.48
Rv(impervious)
0.95
%Impervious
10%
Total ReDev. She Area
(acres)
4.74
ReDev She W
0.21
Treatment Volume and Nutrient Load
TP Load Reduction Required (lb/yr) 1 3.46
Post-ReDevelopment
Treatment Volume
0.0826
(acre.ft)
POst-ReDev.( .nt
Treatment Volume
3,596
(cubic feet)
Post-ReDevelopment
Load (TP)
2.26
(lb/yr)'
Post-Re0evelopmen[TP
Loatl per acre
(Ib/arre/yr)
Marc. ReduRion Required
leelow Pre-
Repevelopmen[batl)
toss
Post -Development New Impervious
New Impervious Cover 179
(acres)
Rv(impervious) 1 0.95
Post -Development
Treatment Volume 7
(acre-h)
Port -Development
Treatment Volume(cubw 6,173
feet)
Post -Development TP Loatl
(lb/yr) 3.88
TP Load Reduction
Required for 0.32
Redeveloped Area
(lb/yr)
TP Load Reduction
Required for New 3.14
Impervious Area (Ib/yr)
• Reduction below new development load
limitation nor required
Virginia Runoff Reduction Method Worksheet
DEQ Virginia Runoff Reduction Method Re -Development Compliance Spreadsheet - Version 3.0
BMP Design Specifications List: 2013 Draft Stds & Specs
Site Summary
Project Title: ECO VILLAGE
Date: 43726 Total Rainfall (in): 43
Total Disturbed Acreage: 5.90
Site Land Cover Summary
Pre-ReDevelopment Land Cover (acres)
A soils
BSoils
CSoils
DSoils
TotalsM10O
Forest/Open (acres)
3.24
1.07
0.00
0.00
4.31
Managed Turf (acres)
1.12
0.62
0.00
0.00
1.74
Impervious Cover (acres)
0.36
0.12
0.00
0.00
0.48
6.53
Post-ReDevelopment Land Cover (acres)
A soils
B Soils
C Soils
D Soils
Totals
/ of Total
Forest/Open (acres)
1.26
0.00
0.00
0.00
1.26
19
Managed Turf (acres)
1.81
1.19
0.00
0.00
3.00
46
Impervious Cover (acres)
1.65
0.62
0.00
0.00
2.27
35
' Forest/Open Space areas must be protected in accordance with the Virginia Runoff Reduction Method
6.53
100
Site Tv and Land Cover Nutrient Loads
Final Post -Development
Post-
Post-
Adjusted Pre-
.. .... .. ....
" - - "' -
(Post-ReDevelopment
ReDevelopment
Development
......... ..:.......... :......:
...................................
& New Impervious)
(New Impervious)ReDevelopment
Site Rv
0.41
0.21
0.95
0.17
Treatment Volume (fts)
9,769
3,596
6,173
2,919
TP Load (lb/yr)
6.14
2.26
3.88
1.83
Baseline TP Load(lb/yr): 1.9434* 'Reduction below new development food limitation not required
Total TP Load Reduction Required (lb/yr) 3.46 0.32 3.14
Final Post -Development Load
(Post-ReDevelopment & New Impervious)
Pre-
ReDevelopment
TN Load (lb/yr)
43.91
13.79
Pre
Final Post -Development
Post-ReDevelopment TP
ReDevelopment
TP Load per acre
Load per acre
TP Load per acre
(lb/acre/yr)
(lb/acre/yr)
Ib acre r
0.39
0.94
0.48
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Site Compliance Summary
Maximum % Reduction Required Below 20% ' Note: % Reduction will reduce post -development TP load to less than or equal to baseline load of 1.94 lb/yr (0.41 lb/ac/yr)
Pre-ReDevelopment Load (Required reduction for Post-ReDev. = Post-ReDev TP load - baseline load of 1.9434 lb/yr], baseline load = site area x 0.41 fb/ac/yr
Total Runoff Volume Reduction (fts)
2,422
Total TP Load Reduction Achieved (lb/yr)
3.66
Total TN Load Reduction Achieved (lb/yr)
15.25
Remaining Post Development TP Load
(lb/yr)
2.48
Remaining TP Load Reduction (lb/yr)
Required
0.00
** TARGET TP REDUCTION EXCEEDED BY 0.2 LB/YEAR **
'Reduction below new development load limitation not required
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Drainage Area Summary
I . : : : :
D.A. A
I D.A. B
I D.A.0
I D.A. D
D.A.E
Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0.00
Managed Turf (acres)
0.36
0.39
0.77
0.15
0.14
1.81
Impervious Cover (acres)
0.48
0.37
0.23
0.64
0.33
2.05
Total Area (acres)
0.84
0.76
1.00
0.79
0.47
3.86
Drainage Area Compliance Summary
...................................
D.A. A
D.A. B
D.A. C
D.A. D
D.A. E
Total
7P Load Reduced (lb/yr)
1.03
0.82
0.81
1.01
0.00
3.66
TN Load Reduced (lb/yr)
5.44
4.33
5.48
0.00
0.00
15.25
Drainage Area A Summary
Land Cover Summary
Summary Print
Virginia Runoff Reduction Method Worksheet
ASoils
BSoils
CSoils
DSoils
Total
%of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
0.13
0.23
0.00
0.00
0.36
43
Impervious Cover (acres)
0.23
0.25
0.00
0.00
0.48
57
0.84 j
BMP Selections
Managed Turf
Impervious Cover
TP Load from
Practice
Credit Area
Credit Area
BMPTreatment
Volume (ft')
Upstream
Untreated TP Load
to Practice (Ibs)
TP Removed
(Ib/yr)
TP Remaining
(Ib/yr)
Downstream Treatment
to be Employed
acres
acres
practices Ibs
5.a. Bioretention #1 or Micro-Bioretention
0.36
0.48
1,893.05
0.00
1.19
0.65
0.53
14.b. MTD -Filtering
#1 or Urban Bioretention (Spec #9)
14.b. Manufactured Treatment Device -
Filtering
1,235.83
0.53
0.00
0.37
0.16
Total Impervious Cover Treated (acres)
0.48
Total Turf Area Treated (acres)
0.36
Total TP Load Reduction Achieved in D.A.
(lb/yr)
1.03
Total TN Load Reduction Achieved in D.A.
(lb/yr)
5.44
Drainage Area B Summary
Land Cover Summary
ASoils
BSoils
CSoils
DSoils
Total
%of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
0.28
0.11
0.00
0.00
0.39
51
Impervious Cover (acres)
0.26
0.11
0.00
0.00
0.37
49
0.76
BMP Selections
Managed Turf
Impervious Cover
TP Load from
Practice
Credit Area
Credit Area
BMPTreatment
Volume (ft')
Upstream
Untreated TP Load
to Practice (Ibs)
TP Removed
(Ib/yr)
TP Remaining
(Ib/yr)
Downstream Treatment
to be Employed
acres
acres
practices Ibs
6.a. Bioretention #1 or Micro-Bioretention
0.39
0.37
1,508.27
0.00
0.95
0.52
0.43
14.b. MTD -Filtering
#1 or Urban Bioretention (Spec #9)
14.b. Manufactured Treatment Device -
Filtering
904.96
0.43
0.00
0.30
0.13
Total Impervious Cover Treated(acres)
0.37
Total Turf Area Treated (acres)
0.39
Total TP Load Reduction Achieved in D.A.
(lb/yr)
0.82
Total TN Load Reduction Achieved in D.A.
(lb/yr)
4.33
Drainage Area C Summary
Land Cover Summary
ASoils
BSoils
CSoils
DSoils
Total
%of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
0.14
0.63
0.00
0.00
0.77
77
Impervious Cover (acres)
0.05
0.18
0.00
0.00
0.23
23
1.00
BMP Selections
Managed Turf
Impervious Cover
TP Load from
Practice
Credit Area
Credit Area
BMPTreatment
Volume (ft')
Upstream
Untreated TP Load
to Practice (Ibs)
TP Removed
(Ib/yr)
TP Remaining
(Ib/yr)
Downstream Treatment
to be Employed
acres
acres
practices Ibs
6.b. Bioretention #2 or Micro-Bioretention
#2 (Spec #9)
0.77
0.23
1,326.77
0.00
0.83
0.75
0.09
14.b. MTD - Filtering
14.b. Manufactured Treatment Device -
Filtering
265.35
0.08
0.00
0.06
0.02
Total Impervious Cover Treated(acres)
0.23
Total Turf Area Treated (acres)
0.77
Total TP Load Reduction Achieved in D.A.
(lb/yr)
0.81
Total TN Load Reduction Achieved in D.A.
(lb/yr)
5.48
Summary Print
Virginia Runoff Reduction Method Worksheet
Drainage Area D Summary
Land Cover Summary
A Soils
BSoils
CSoils
DSoils
Total
%of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
OAS
0.00
0.00
0.00
0.15
19
Impervious Cover (acres)
0.02
0.62
0.00
0.00
0.64
81
0.79 j
BMP Selections
Managed Turf
Impervious Cover
TP Load from
Practice
Credit Area
Credit Area
BMPTreatment
Volume (ft')
Upstream
Untreated TP Load
to Practice (Ibs)
TP Removed
(Ib/yr)
TP Remaining
(Ib/yr)
Downstream Treatment
to be Employed
acres
acres
practices Ibs
14.b. Manufactured Treatment Device-
Filtering
0.15
0.64
2,288.72
0.00
1.44
1.01
0.43
Total Impervious Cover Treated (acres)
0.64
Total Turf Area Treated (acres)
0.15
Total TP Load Reduction Achieved in D.A.
(lb/yr)
1.01
Total TN Load Reduction Achieved in D.A.
(lb/yr)
0.00
Drainage Area E Summary
Land Cover Summary
ASoils
BSoils
CSoils
DSoils
Total
%of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
0.14
0.00
0.00
0.00
0.14
30
Impervious Cover (acres)
0.33
0.00
0.00
0.00
0.33
70
0.47
BMP Selections
Managed Turf Impervious Cover TP Load from
BMP Treatment Untreated TP Load TP Removed TP Remaining Downstream Treatment
Practice Credit Area Credit Area Upstream
(acres) (acres) Volume (ft') Practices (Ibs) to Practice (Ibs) (lb/yr) (16/yr) to be Employed
Total Impervious Cover Treated (acres)
0.00
Total Turf Area Treated (acres)
0.00
Total TP Load Reduction Achieved in D.A.
(lb/yr)
0.00
Total TN Load Reduction Achieved in D.A.
(lb/yr)
0.00
Summary Print
Eco Village
Rain Garden Summary
Typ. DA A
Garden
Typ. DA B Garden
Gravel Bottom El.
0.00
0.00
Soil Media Bottom
1.00
1.00
Filter Surface
2.50
2.50
Top of Berm
3.50
3.50
Riser
6" PVC Riser
6" PVC Riser
Underdrain(Perf PVC)
6" @ 0.5
6" @ 0.5
Riser Rim Elev.
3.00
3.00
Pipe Out
6" PVC
6" PVC
Weir Length
N/A
N/A
Notes:
23 gardens in
15 gardens in
drainage area
drainage area
Level of Design
Level 1
Level 1
Design Volume
1893cf/23=83
1508/15=101
Pretreatment Vol.
714 cf
1065 cf
Impervious Area
0.48 ac
0.37 cc
Required Media Area
65.10
79.22
Provided Media Area
67
80
Trees Provided
1
1
Biofilter Sizing Calculations
depth of stone 1.00
depth of media 1.50
ponding depth 0.50
equivalence depth: stone 0.4
equivalence depth: media 0.375
equivalence depth: surface 0.5
sum 1.275
TV (from VRRM) (cf) 83
Required area=TV / sum of
equivalent depth) 65.10
1.00
1.50
0.50
0.4
0.375
0.5
1.275
101
79.22
biofilter bottom area (sf) 67 80
downspout energy downspout energy
preatreatment dissipater dissipater
Eco Village
Biofilter Summary
DA C-1
DA C-2
Gravel Bottom El.
440.00
412.50
Soil Media Bottom
442.50
414.50
Filfer Surface
445.50
417.50
Top of Berm
447.00
418.50
Standpipe
48" Conc. Riser
24" HDPE Riser
Underdrain(Perf PVC)
6" @ 441.5
6" @ 413.5
Riser Rim Elev.
446.00
418.00
15" HDPE @
12" HDPE @
Pipe Out
EI.=O
EI.=O
Weir Length
N/A
N/A
1 -yr WSE
10-yr WSE
100-yr WSE
Level of Design
Level 2
Level 2
Design Volume
1105
231
Pretreatment Vol.
165.75
1065 cf
Impervious Area
20,820 sf
16,145 sf
Required Media Area
746.62
170.45
Provided Media Area
750
175
Trees Required
3
1
Biofilter Sizing Calculations
depth of stone
1.50
1.00
depth of media
3.00
3.00
ponding depth
0.50
0.50
equivalence depth: stone
0.6
0.4
equivalence depth: media
0.75
0.75
equivalence depth: surface
0.5
0.5
sum
1.85
1.65
note: level 2 design requires 12" stone sump,
which is excluded from storage calculations.
TV (from VRRM) (cf)
1105
225
Required area=TV / sum of
equivalent depth)
746.62
170.45
biofilter bottom area (sf)
660
155
Pretreatment volume (cf)
165.75
33.75
pretreatment:
native grass filter strip
gravel flow spreader
0
SHED
X ECO VILLAGE
X PREDEV INLET
DRAINAGE MAP
� , 1
t*z
(I� /t
llii' % / / %•/°``� �' mil_.!
v 10 I I / i TO/'X1�PRE/• i /'�'�=--_� `�♦
1611
m 1 I I 1 { ,I `: 19141,E SF
III1 °►ter
1 \ i \ ' I \ � ����� T � °� % �� `.� �\ i i i `��` Ili i �r♦rr� a. —i'�,�r\M
0<1
� \ `. \ `. \ `. \ I \ � \ 1 I i I I I \ 1 \ \ I I 1 1 0 1� r, \ • i �� --- Y�.�
CCNC. ENDWALL C P / �\ .Q .\sl,`\ I 1 \ 1 I I 1 / 1 V \ I '�►
iba-387. 1 \ 2 / `` `I `` \ \ I i i I i i 1 i �I i I ; ' it \ _ i!'►i `4 +�
mv-aes.ze ' ' ° i ..
1 � �O .'�� _/ � ' �' i i ' � %, � //i i � � 10 it i o I i i ° � \ `\\ `�\• \�__�_` �♦�_.,�
1 , I Ln I I
Q------ \
6, !'-----,-.---- --------
------ , ' / ° , ' 1 ' ' O • `\\ ' ----;---5-- °-----------w G _ _3294 $rol
_ \
460
1 4.
%, ;/ ;i ,: \ • 11 i i Yam/ - _ - `♦
O Cy
X4
TO Xj PRE: / ' / �♦ s ' `I \
11620,9F TOTAL / / // ; I ° ♦ ;
�Z'`�
rn 1 1 1
\
o j�
'TO X3 PRE:----------'
\ \\ \\ `\\ `\\ \\ \\ \\ ;\\�\ \� �,.,__�•; �/. Stso` `.411765f TOTAL41
\ / Z/
%`� `� _ — — - _ _ -- --
-----------
-
0 ---�------------- p --_ _ —
------ 14
♦ ems— /
4/be iii STATE ROUTE 631 (w
_ _ O wo rsoa EAW O _
80 0 80 160 240
. Scale: 1 "=80'
SHED
ECO VILLAGE
POSTDEV INLET
DRAINAGE MAP
1 TO 5C:
208 0 SF
5
1
T `ice til /
O I \
A6 E
N0C1_n `.� I 0320
/ A E3
--
/ ,3y4515 SF I I ° /---------- — — — — — ---- -
r - 1 — ----------------------------------_ ; ---
� --""-------------------------------------�'_
ISO
SF
1410
\ ISO,
\
/
4fa X3 STATE ROUTE 631 C.a'
` - - - - RIO ROAD EAST
80 0 80 160 240
Scale: 1 "=80'
Eco Village
LD-204 Stormwater Inlet Computations
Inlets on Grade Only
Sag Inlets Only
N
N
L_
N
a)Z
N
N
Q
C
N
>
Z
N
d
O
U
a
CL
L
O_
N
_
O
W
c
X
(UD
cyNa
O-
U
d
U
iu
O
Q
O
d
U
N
U
O
H
C
>
m
d
N
(D
o a
L
O-
a)
W
N
C
m
O
a
-o
-2
2
O
OQ
a
w
2
U
U
m
U
S
0
a
O
2
C7
a
C7
H co
o
o
0
O
1
2
3
4
5
6
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
(ft)
(ac)
(in/hr)
(cfs)
(cfs)
(cfs)
('/')
('/')
('/')
(ft)
(ft)
(cfs)
(cfs)
(ft)
(ft)i
(ft)
X4
DI-7
10
0.72
0.41
0.29
4.0
1.17
0.00
1.17
0.015
0.040
0.020
0.083
2.36
0.20
100.0%
1.17
0.00
6.5
1.90
0.00
1.90
2.84
0.24
100.0%
1.90
0.00
X3
DI-7
10
0.67
0.49
0.33
4.0
1.31
0.00
1.31
0.015
0.046
0.020
0.083
2.40
0.20
100.0%
1.31
0.00
6.5
2.12
0.00
2.12
2.88
0.24
100.0%
2.12
0.00
X2
DI-7
10
0.87
0.59
0.51
4.0
2.04
0.00
2.04
0.013
0.080
0.020
0.250
0.32
1.0
0.32
1.28
6.5
3.31
0.00
3.31
0.39
1.0
0.39
1.54
X1
CULVERT
10
0.88
0.49
0.43
4.0
1.73
0.03
1.75
0.015
0.120
0.020
0.083
100.0%
1.75
0.00
6.5
2.80
0.12
2.92
100.0%
2.92
0.00
C2
DI-313
16
0.48
0.77
0.37
4.0
1.50
0.00
1.50
0.015
0.040
0.020
-
6.30
0.13
100.0%
1.50
0.00
6.5
2.43
0.00
2.43
7.57
0.15
92.6 %
2.25
0.18
D2
DI-313
14
0.34
0.81
0.27
4.0
1.09
0.00
1.09
0.015
0.050
0.020
5.21
0.11
100.0%
1.09
0.00
6.5
1.78
0.18
1.96
6.50
0.14
90.1 %
1.76
0.19
A5C
DI-313
8
0.48
0.62
0.30
4.0
1.19
0.00
1.19
0.015
0.037
0.042
0.13
0.5
0.25
3.70
6.5
1.93
0.00
1.93
0.17
0.5
0.35
4.43
A513
DI-3B
14
0.15
0.71
0.11
4.0
0.44
0.00
0.44
0.015
0.120
0.020
3.25
0.07
100.0%
0.44
0.00
6.5
0.71
0.19
0.90
4.24
0.09
97.2 %
0.88
0.03
A5Z
DI-3B
8
0.17
0.56
0.09
4.0
0.37
0.00
0.37
0.015
0.100
0.020
3.05
0.06
93.1 %
0.35
0.03
6.5
0.60
0.00
0.60
3.54
0.07
81.2 %
0.49
0.11
A5A
DI-3B
6
0.03
0.81
0.02
4.0
0.08
0.00
0.08
0.015
0.100
0.020
1.72
0.04
100.0%
0.08
0.00
6.5
0.14
0.03
0.16
2.23
0.05
98.2 %
0.16
0.00
A5
DI-3B
12
0.29
0.52
0.15
4.0
0.61
0.00
0.61
0.015
0.045
0.020
0.083
1.85
0.16
100.0%
0.61
0.00
6.5
0.99
0.00
0.99
2.87
0.18
100.0%
0.99
0.00
LD-229 Storm Drain Design Computations PREDEV
Eco Village
From
Structure
To
Structure
Catch.
Area
(ac)
Runoff
Coef
Increment
AC
Accum.
AC
Total
TOC
(min)
25-Yr
Intensity
(in/hr)
Total
Flow
(cfs)
Up
Invert
Elev.
Down
Invert
Elev.
Pipe
Length
(ft)
Invert
Slope
%
Pipe
Diameter
(in)
Pipe
Capacity
(cfs)
Velocity
(ft/s)
Flow time
Increment
(min)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X4 PRE
OUT
0.75
0.39
0.29
0.29
5.00
7.48
2.19
444.77
434.29
70.00
14.97%
18
35.3
10.4
0.11
X3 PRE
OUT
0.95
0.43
0.41
0.41
5.00
7.48
3.05
420.37
418.22
41.00
5.24%
18
20.8
7.5
0.09
X2 PRE
OUT
3.74
0.43
1.60
1.60
5.00
7.48
11.93
390.75
385.26
59.00
9.31%
18
27.8
10.5
0.09
X1 PRE
OUT
2.10
0.42
0.88
0.88
5.00
7.48
6.54
380.20
376.37
66.60
5.75%
18
21.8
8.6
0.13
LD-229 Storm Drain Design Computations
Eco Village
From
To
Catch.
Runoff
Increment
Accum.
Total
25 Yr
Total
Up
Down
Pipe
Invert
Pipe
Pipe
Velocity
Flow time
Structure
Structure
Area
Coef
AC
AC
TOC
Intensity
Flow
Invert
Invert
Length
Slope
Diameter
Capacity
Increment
(ac)
(min)
(in/hr)
(cfs)
Elev.
Elev.
(ft)
%
(in)
(cfs)
(ft/s)
(min)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
X4
OUT
0.72
0.41
0.29
0.29
5.00
7.48
2.18
444.77
434.29
70.00
14.97%
18
35.3
11.1
0.11
X3
OUT
0.67
0.49
0.33
0.33
5.00
7.48
2.44
420.37
418.22
41.00
5.24%
18
20.8
7.9
0.09
X2
OUT
0.87
0.59
0.51
0.51
5.00
7.48
3.81
390.75
385.26
59.00
9.31 %
18
27.8
11.0
0.09
X1
OUT
0.88
0.49
0.43
0.43
5.00
7.48
3.22
380.20
376.37
66.60
5.75%
18
21.8
8.8
0.13
11
H1
0.35
0.60
0.21
0.21
5.00
7.48
1.60
453.00
443.00
201.82
4.95%
12
8.6
8.4
0.40
H1
B5
0.29
0.60
0.17
0.39
5.40
7.33
2.83
440.00
437.00
29.88
10.04%
12
12.2
12.7
0.04
B5
B4
0.79
0.49
0.39
0.77
5.44
7.32
5.66
433.00
427.70
36.64
14.47%
15
26.7
17.3
0.04
G1
B3
0.36
0.58
0.21
0.98
5.48
7.30
7.17
420.00
415.50
45.43
9.91%
15
22.0
16.0
0.05
E2
E1
0.33
0.55
0.18
0.18
5.00
7.48
1.35
414.70
412.80
11.85
16.03%
12
15.4
12.1
0.02
E1
B2
0.24
0.39
0.09
0.27
5.02
7.47
2.05
411.30
409.20
42.03
5.00%
15
15.7
9.5
0.07
B2
B1
0.38
0.63
0.24
1.50
5.09
7.44
11.14
409.00
407.00
59.60
3.36%
18
21.9
12.0
0.08
C2
C1
0.48
0.77
0.37
0.37
5.00
7.48
2.80
410.40
408.00
28.67
8.37%
15
20.2
11.6
0.04
D2
D1
0.34
0.81
0.27
0.27
5.00
7.48
2.04
408.00
407.00
51.61
1.94%
15
10.8
6.3
0.14
A7
A6
2.14
5.09
6.78
14.55
402.83
401.43
10.65
13.15%
18
41.9
21.6
0.01
A5C
A513
0.48
0.62
0.30
0.30
5.00
7.48
2.22
399.00
393.20
44.15
13.14%
15
25.4
12.7
0.06
A51B
A5A
0.15
0.71
0.11
0.41
5.06
7.45
3.03
393.00
389.50
40.40
8.66%
15
20.6
12.0
0.06
A5Z
A5A
0.17
0.56
0.09
0.09
5.00
7.48
0.69
387.50
386.70
32.60
2.45%
15
11.0
5.0
0.11
A5A
A5
0.03
0.81
0.02
0.52
5.11
7.44
3.87
387.50
386.70
33.38
2.40%
15
10.8
8.1
0.07
A6
A5
2.14
5.10
6.78
14.54
400.43
389.00
122.69
9.32%
18
34.8
18.8
0.11
A5
A4
0.29
0.52
0.15
2.82
5.18
6.76
19.04
386.00
384.20
50.10
3.59%
18
21.6
13.8
0.06
A4
A3
2.82
5.24
6.74
18.99
384.00
378.00
66.58
9.01 %
18
34.2
19.8
0.06
A3
A2
2.82
5.29
6.73
18.95
375.00
343.50
157.14
20.05%
18
50.9
26.7
0.10
A2
Al
2.82
5.39
6.70
18.87
338.50
335.00
56.19
6.23%
24
61.2
17.2
0.05
Note: All Postdev flow to Existing Culverts X1-X4 under Rio Rd East is less than the Predev flow.
ECO VILLAGE
Orange cells need input, white cells are calculations.
Basin SB-1
Step 1: Preliminary Design
Top of Dam
408.7
Downstream Toe of Dam
400.0
Barrel length (ft)
127.0
Slope of principal spillway barrel (%)
13.6%
SteD 2: Calculate Runoff
Rational Method
Drainage Area (ac)
4.00
C
0.8
I2
4.3
I25
6.6
Q2 (cfs)
12.9
Q25 (cfs)
19.8
From Plate 3.14-
Spillway Capacity
with emergency spillway (cfs) 19.8
Riser Diameter (in) 48
Actual head (ft) 0.70
QP (max) 24.0
From Table 3.14-C
Required spillway capacity 0.0
HP 0.0
b - Bottom width (ft) 0
S - slope of exit channel (ft/foot) 0.00
X - minimum length of exit channel (f 0
SteD 5: Grade Basin
Design Parameters
Maximum Top of wet Storage
406.0
Required Wet + Dry Storage (cf)
14,472
Wet Storage
Required Volume (cy)
268
Required Volume (cf)
7,236
Minimum Standpipe Invert
404.0
Cleanout Required Volume (cy)
132
Cleanout Required Volume (cf)
3,564
Design I Elevation Area
Bottom of Wet Stora2el 400.0 1 1A
Basin
Cleanout
Top of Wet
Cleanout Volume (cf)
Wet Storage Volume (cf)
Wet Storage Volume (cy)
Dry Storage
Required Volume (cy)
Required Volume (cf)
Maximum Top of Dry Storage
Bottom of Dry
Top of Dry
Dry Storage Volume (cf)
Dry Storage Volume (cy)
SB-1
401.0 1,780
402.0 2,161
403.0 2,577
404.0 3,030
3,578
8,751
324
268
7,236
406.7
Design Elevation Area (s
Storage 404.0 3,030
405.0 3,720
Storage 406.0 4.350
Step 6: Final Details
Upstream Toe of Dam
Principle Spillway Elevation
Trash rack and anti -vortex device
From Table 3.14-D: _
Diameter (in)
Height (in)
From Retention Basin Design and
Plate 3.14-B:
Head on barrel (ft)
QP (max)
Barrel diameter (in)
Dewatering Orifice Design
Riser Height
h (ft)
S (cf)
Q (cfs)
A (sf)
d (ft)
Dewatering Orifice Diameter (in)
Flexible Tubing Diameter (in)
Baffle Calculation
Length of Flow (L) (ft)
Effective Width (We) (ft)
LIWe
Baffles Required?
7,410
274
400.0
405.0
72
21
16.0
28.9
6.0
1.0
7,410
0.34
0.071
0.301
6
8
225
70
3.2
no
3
En
722170
38° 3' 9" N
M
O
M
N
V
38° 2' 46' N
722170 722240 722310 722380
3
fn
Map Scale: 1:2,030 if printed on B portrait (11" x 17") sheet.
Meters N
0 30 60 120 180
Feet
0 50 100 200 300
Map projection: Web Mercator Comer coordinates: WGS84 Edge tics: UTM Zone 17N WGS84
usDA Natural Resources Web Soil Survey
Conservation Service National Cooperative Soil Survey
Hydrologic Soil Group —Albemarle County, Virginia, and Charlottesville City, Virginia
722240 722310 722380 722450
M450 722520
722520
3
a
N
722590
38° 39" N
N
V
38° 2' 46' N
722590
3
f�
v
N
8/1 /2019
Page 1 of 5
Hydrologic Soil Group —Albemarle County, Virginia, and Charlottesville City, Virginia
Hydrologic Soil Group
Map unit symbol
Map unit name
Rating
Acres in AOI Ed
Percent of,' —
16
Chewacla silt loam
B/D
0.5
7.6
2.1%
35.6%
21 B
Culpeper fine sandy
loam, 2 to 7 percent
slopes
B
47D
Louisburg sandy loam,
15 to 25 percent
slopes
A
13.3
62.1 %
48E
Louisburg very stony
sandy loam, 25 to 45
percent slopes
A
0.0
0.0%
Subtotals for Soil Survey Area
21.4
99.8%
Totals for Area of Interest
21.4
100.0%
Map unit symbol
Map unit name
Rating
Acres in AOI
Percent of AOI
47D
Louisburg sandy loam,
15 to 25 percent
slopes
A
0.0
0.2%
Subtotals for Soil Survey Area
0.0
0.2%
Totals for Area of Interest
21.4
100.0%
USDA Natural Resources Web Soil Survey 8/1/2019
Conservation Service National Cooperative Soil Survey Page 4 of 5
Precipitation Frequency Data Server
https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_printpage.html?lat=38.0483 &...
NOAA Atlas 14, Volume 2, Version 3
Location name: Charlottesville, Virginia, USA*
Latitude: 38.0483°, Longitude:-78.4651*
Elevation: 408.24 p N'I'dsft**source: ESRI Ma
" source: USGS
POINT PRECIPITATION FREQUENCY ESTIMATES
G.M. Bonnin, D. Martin, B. Lin, I Parzybok, M.Yekta, and D. Riley
NOAA, National Weather Service, Silver Spring, Maryland
PF tabular I PF graphical I Maps & aerials
PF tabular
PDS-based point precipitation frequency estimates with 90% confidence intervals (in inches)1
Average recurrence interval (years)
Duration
1
2
5
10
25
50
1 100
00
200
500
1000
0.353
0.421
0.493
0.554
0.624
0.678
0.729
0.777
0.834
0.881
5-min
(0.318-0.392)
(0.379-0.467)
(0.444-0.546)
(0.498-0.613)
(0.558-0.688)
(0.604-0.747)
(0.645-0.803)
(0.683-0.856)
(0.726-0.922)
(0.760-0.977)
0.563
0.673
0.789
0.886
0.994
1.08
1.16
1.23
1.32
1.39
10-min
(0.508-0.626)
(0.607-0.746)
(0.710-0.875)
(0.796-0.981)
(0.889-1.10)
(0.962-1.19)
(1.03-1.28)
(1.08-1.36)
(1.15-1.46)
(1.20-1.54)
0.704
0.846
0.999
1.12
1.26
1.37
1.46
1.55
1.66
1.74
15-min
(0.635-0.783)
(0.763-0.938)
(0.899-1.11)
1 (1.01-1.24)
1 (1.13-1.39)
1 (1.22-1.51)
1 (1.30-1.61)
1 (1.37-1.71)
1 (1.45-1.84)
1 (1.50-1.93)
0.966
1.17
1.42
1.62
1.87
2.06
2.24
2.42
2.64
2.82
30-min
(0.871-1.07)
1 (1.05-1.30)
1 (1.28-1.57)
1 (1.46-1.80)
1 (1.67-2.06)
1 (1.83-2.27)
1 (1.99-2.47)
1 (2.13-2.67)
1 (2.30-2.92)
1 (2.43-3.13)
1.20
1.47
1.82
2.11
2.49 1
F 2.79
3.09
3.39 1
F 3.79
4.12
60-min
(1.09-1.34)
1 (1.32-1.63)
1 (1.64-2.02)
1 (1.90-2.34)
1 (2.22-2.74)
1 (2.49-3.08)
1 (2.74-3.40)
1 (2.98-3.74)
1 (3.30-4.19)
1 (3.55-4.57)
1.45
1.76
2.20
2.58
3.08
3.49
3.91
4.36
4.97
5.49
2-hr
(1.27-1.66)
1 (1.54-2.00)
1 (1.93-2.50)
1 (2.27-2.93)
1 (2.68-3.48)
1 (3.03-3.95)
1 (3.38-4.42)
1 (3.73-4.92)
1 (4.21-5.62)
1 (4.60-6.22)
1.59
1.92
2.40
2.82
3.36
3.82
4.28
4.77
5.45
6.03
3-hr
(1 .39-1.82)
1 (1.68-2.21)
1 (2.10-2.76)
1 (2.45-3.23)
1 (2.91-3.84)
1 (3.29-4.35)
1 (3.67-4.88)
1 (4.06-5.44)
1 (4.58-6.22)
1 (5.00-6.89)
2.02
2.44
3.03
3.57
4.29
4.92
5.58
6.29
7.31
8.20
6-hr
(1.79-2.29)
1 (2.15-2.77)
1 (2.67-3.43)
1 (3.13-4.04)
1 (3.74-4.85)
1 (4.25-5.54)
1 (4.78-6.29)
1 (5.33-7.09)
1 (6.10-8.24)
1 (6.75-9.26)
2.54
3.06
3.82
4.52
5.50
6.37
7.31
8.35
9.88
11.3
12-hr
(2.24-2.91)
1 (2.70-3.50)
1 (3.35-4.37)
1 (3.96-5.16)
1 (4.78-6.25)
1 (5.48-7.23)
1 (6.21-8.29)
1 (7.00-9.46)
1 (8.13-11.2)
1 (9.11-12.8)
3.03
3-.6 7 1
F-4-.69--]5.54
6.81
7.90
9.10
10.4
12.4
14.1
24-hr
(2.72-3.40)
1 (3.30-4.12)
1 (4.20-5.26)
1 (4.95-6.20)
1 (6.04-7.59)
1 (6.96-8.79)
1 (7.95-10.1)
1 (9.01-11.6)
1 (10.5-13.8)
1 (11.8-15.6)
3.58
4.33
5.51
6.49
7.89
9.07
10.4
11.7
13.8
15.5
2-day
(3.21-4.00)
1 (3.89-4.85)
1 (4.94-6.16)
1 (5.79-7.23)
1 (7.00-8.78)
1 (7.98-10.1)
1 (9.04-11.5)
1 (10.2-13.1)
1 (11.8-15.4)
1 (13.1-17.3)
3.81
4.61
5.86
6.89
8.38
9.63
11.0
12.5
14.6
16.4
3-day
(3.46-4.22)
1 (4.19-5.11)
1 (5.31-6.49)
1 (6.23-7.62)
1 (7.53-9.25)
1 (8.59-10.6)
1 (9.73-12.1)
1 (10.9-13.7)
1 (12.7-16.2)
1 (14.1-18.2)
4.04
4.89
6.21
7.30
8.87
10.2
11.6
13.2
15.4
17.3
4-day
(3.71-4.44)
(4.49-5.38)
(5.69-6.83)
(6.66-8.00)
(8.06-9.72)
(9.20-11.2)
(10.4-12.7)
(11.7-14.4)
(13.5-16.9)
(15.0-19.1)
4.70
5.65
7.07
8.23
9.90
11.3
12.8
14.4
16.7
18.6
7-day
(4.32-5.12)
1 (5.20-6.17)
1 (6.49-7.71)
1 (7.53-8.97)
1 (9.01-10.8)
1 (10.2-12.3)
1 (11.5-13.9)
1 (12.8-15.7)
1 (14.7-18.3)
1 (16.2-20.4)
5.32
6.39
7.89
9.11
10.8
12.2
13.7
15.3
17.5
19.4
10-day
(4.92-5.76)
1 (5.91-6.91)
1 (7.28-8.53)
1 (8.39-9.85)
1 (9.93-11.7)
1 (11.2-13.2)
1 (12.4-14.8)
1 (13.8-16.6)
1 (15.6-19.0)
1 (17.1-21.1)
6.99
8.34
10.1
11.4
13.3
14.7
16.2
17.7
19.8
21.4
20-day
(6.55-7.48)
1 (7.81-8.92)
1 (9.42-10.8)
1 (10.7-12.2)
1 (12.4-14.2)
1 (13.7-15.8)
1 (15.0-17.4)
1 (16.3-19.0)
1 (18.1-21.3)
1 (19.4-23.1)
8.57
10.2
12.0
13.4
15.3
16.7
18.0
19.4
21.2
22.5
30-day
(8.07-9.13)
1 (9.57-10.8)
1 (11.3-12.8)
1 (12.6-14.3)
1 (14.3-16.3)
1 (15.6-17.7)
1 (16.8-19.2)
1 (18.0-20.7)
1 (19.5-22.6)
1 (20.7-24.1)
10.7
12.6
14.8
16.4
18.4
19.9
21.4
22.8
24.6
26.0
45-day
(10.1-11.3)
1 (11.9-13.4)
1 (14.0-15.6)
1 (15.5-17.3)
1 (17.3-19.5)
1 (18.7-21.1)
1 (20.1-22.7)
1 (21.3-24.2)
1 (22.9-26.2)
1 (24.1-27.7)
FUZZ]14.8
17.1
18.8
20.9
22.5
24.1
25.5
27.4
28.7
60-day
(11.9 13.2)
(14.0-15.6)
(16.2-18.0)
(17.8 19.8) 1
(19.8 22.1)
(21.2-23.8)
(22.6-25.4)
(23.9-27.0)
(25.6-29.0)
(26.7-30.5)
Precipitation frequency (PF) estimates in this table are based on frequency analysis of partial duration series (PDS).
Numbers in parenthesis are PF estimates at lower and upper bounds of the 90 % confidence interval. The probability that precipitation frequency estimates (for
a given duration and average recurrence interval) will be greater than the upper bound (or less than the lower bound) is 5 % . Estimates at upper bounds are not
checked against probable maximum precipitation (PMP) estimates and may be higher than currently valid PIMP values.
Please refer to NOAA Atlas 14 document for more information.
Back to Top
PF graphical
1 of 4 11/13/2018, 5:19 PM
Section 6. Pollution Prevention Plan.
(reference County Code 17-404 and State Regulation 9VAC25-880-70 part II section A.4)
A. Plan showing pollution activities and prevention practices
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
MATERIAL
DELIVERY
AREA
do
n O
SPILL KIT
t � / / / STATION
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9
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STORAGE AREA
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PORTAJOHNS,
TRASH, AND
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THE
ECO VILLAGE
POLLUTIONPREVENTIONPLAN
CONTRACTOR SHALL
ENSURE RIGHT-OF-WAY
DIVERSION IS PROPERLY
MAINTAINED AND VERIFIED
FUNCTIONAL AFTER
EVERY WORKDAY
NOTE: CONCRETE CLEANOUT
NEAR ENTRANCE SHALL HAVE
A LEAKPROOF CONTAINER
LIMITS OF
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8
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SOIL EROSION & SEDIMENT CONTROL SYMBOLS
SYMBOL NO. TITLE KEY
3.02
CONSTRUCTION ENTRANCE
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3.03
CONSTRUCTION ROAD STABILIZATION
CRS
—X X X X —
3.05
SILT FENCE
SF
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3.07
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P
3.09
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3.31
TEMPORARY SEEDING
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3.32
PERMANENT SEEDING
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ivy
3.35
MULCH
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3.39
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DC
LIMITS
OF DISTURBANCE
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UPDATED LOCATION.
LIMITS OF DISTURBANCE TO BE
FIELD MARKED WITH WHITE
FLAGS OR WHITE PAINT
DD e wTw C11
f - raw w
47
c6
�It — —
j
'o• 470 �a
----______t64�`_ -_-__-
�'- I�_-__ _--"-__--_ \`` --
STOCKPILE cF /I / i ) I I I � \ \ N � -�- - _
/ iii I j I .� 1 - 460 — — — — — — — — — — — _----__ _--
/ PHASE 2 _ _ _
1TERING SITE '/ S / / 1 / */ STOCKPILE I I 1 I _ -- — — _
I-------- ----- - - - - -
PHASE 2 • \ \\ \ / �'-' i BID C1 4 `\
v STOCKPILE / / n 10
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5� j� �/ / I T / 10 '\ / I/ ' i / /'/• / OPERATIONS ' �,�o_ STATION LIMITS OF
U I / 5 ' (TYP) DISTRURBANCE
PA NG 45
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\ / ELING AREA /
111 \ l C
SPILL KIT
STATION
PORTAJOHNS,
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RINSE SUPPLY
ECO VILLAGE
POLLUTIONPREVENTIONPLAN
LIMITS OF
DISTRURBANCE
w
�• r
43t�_ --= —mow Tw—w t—w " "�• �w
\—
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---
y
------
/I
I
SOIL EROSION & SEDIMENT CONTROL SYMBOLS
SYMBOL NO. TITLE KEY
3.02
CONSTRUCTION ENTRANCE
CE
3.03
CONSTRUCTION ROAD STABILIZATION
CRS
—X X X X —
3.05
SILT FENCE
SF
®
3.07
INLET PROTECTION
P
3.09
TEMPORARY DIVERSION DIKE
DD
TS
3.31
TEMPORARY SEEDING
TS
PS
3.32
PERMANENT SEEDING
PS
ivy
3.35
MULCH
D�
3.39
DUST CONTROL
DC
LIMITS
OF DISTURBANCE
POLLUTION PREVENTION ITEMS, BUT
MUST MARK UP DRAWINGS WITH
UPDATED LOCATION.
LIMITS OF DISTURBANCE TO BE
FIELD MARKED WITH WHITE
FLAGS OR WHITE PAINT
" l-w
u�- •/-ram
®
5 0 •T•—• Ip
) '
l � 1
/
PHASE 3 I I I 1
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'I / I
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-- �/
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OPERATION
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1
•—•—•—'�• CONCRETE CLEANOUT W.
'LEAKPROOF CONTAINER
�,B
\� e° PA NG AS
6 $ ♦ 1 — �'
CONCRETE CLEANOUT W. �� (TYP)
LEAKPROOF CONTAINER �` -- - ---46
—
w
, wow
47
/ \ _TYP. HOUSE e-=-470�,
` FOOTPRINT- -
_ _________
00
460
--_--- - - - - - - - - - - - -00
-'_-_-_-_--
AS
7 SPILL KIT
STATION
LIMITS OF
DISTRURBANCE
o
60 0 60 120 180
Scale: 1 "=60'
B.
C. Sources of Pollutants continued. Common activities and minimum control and prevention
practices
Pollutant or Pollutant
Location on site
Prevention Practices
Generating Activity
Control Measures
Follow Erosion and Sediment Control
Clearing, grading, excavating, and un-
Land disturbance area
Plan. Dispose of clearing debris at
stabilized areas
acceptable disposal sites. Seed and mulch,
or sod within 7 days of land clearing
Cover storm drain inlets and use drip pans
Paving operations
Roads and driveways
and absorbent/oil dry for all paving
machines to limit leaks ands ills
Direct concrete wash water into a leak -
Concrete washout and
Current location and detail shown on
proof container or leak -proof settling basin
cement waste
plan
that is designed so that no overflows can
occur
Enclose or cover material storage areas.
Mix paint indoors in a containment area or
Structure construction, stucco,
Structures
in a flat unpaved area. Prevent the
painting, and cleaning
discharge of soaps, solvents, detergents
and wash water, paint, form release oils
and curing com ounds.
Water shall be filtered, settled or similarly
Dewatering operations
Dewatering sites shown on plan
treated prior to discharge as shown on
plan.
Designated areas for material delivery and
Material delivery and storage
Designated area shown on plan
storage. Placed near construction
entrances, away from waterways and
drainage paths
Material use during building process
Building areas
Follow manufacturer's instructions.
MSDS's attached.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Pollutant, or Pollutant
Location on site
Prevention Practices,
Generating Activity
Control Measures
Waste collection area will not receive a
substantial amount of runoff from upland
areas and does not drain directly to a
Current designated container areas on
waterway. Containers have lids covered
Solid waste disposal
plan
before periods of rain, or are in a covered
area. Scheduled collection to prevent
overfilling. MATERIALS NOT TO BE
BURIED ON -SITE
Convenient and well -maintained portable
sanitary facilities will be provided, and
Sanitary waste
Current locations shown on plan
located away from waterways or inlets.
Such facilities shall be regularly
maintained.
Apply fertilizers in accordance with
Landscaping operations
Landscape areas shown on plan
manufacturer's recommendations and not
during rainfall events
To be treated in a sediment basin or better
control as specified on plan. Minimize
Wash Waters
Wash areas shown on plan
the discharge of pollutants from
e ui ment and vehicle washing
Vehicle and equipment washing
Designated areas and details shown on
Provide containment and filtering for all
plan
wash waters per the plan
Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, building products,
construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials
present on the site to precipitation and to stormwater.
(Identify all non-stormwater discharges to occur on your site. Keep this plan up-to-date with ongoing site
changes and inspections. See CGP, 9VAC25-880-70 section E for examples of non-stormwater discharges.)
D. Non-stormwater di;
Discharge
Dust Control Treatment
Pollutants or Pollutant
Constituents
chemicals
Location on Site
Designated areas and details shown on
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
E. Persons responsible for pollution prevention practices
Property owner's representative:
Dave Redding
480 Rio Rd East
Charlottesville, VA 22901
434-926-9505
F. Response and reporting practices
Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement
chemical spill and leak prevention and response procedures as follows. To the extent practical, do not store oils,
chemicals, or other potential contaminants on site. When storage of potential contaminants is required, provide secondary
containment, such as spill berms or spill containment pallets. These should be located within the drainage areas to a
sediment trap or sediment basin. Direct concrete wash water into a settling basin, dispose of hardened concrete with other
construction waste debris to an appropriate waste facility.
Respond to all spills, leaks and discharges as follows. Spills of oil, petroleum products, sanitary wastes, and substances
listed under 40 CFR parts 110, 117, and 302 should be cleaned up as soon as possible while protecting worker safety.
Construct an earthen dike around any spills on dirt to prevent spreading. If a spill occurs during rainfall, cover it with a
tarp or another impermeable cover to prevent contaminating runoff. Do not bury any spills or wash them with water.
Maintain a spill kits in a readily accessible location. A spill kit shall consist of a lined drum with bags of universal
sorbents in the bottom, accessible without tipping the drum, sorbent socks above the bags, and personal protective
equipment on the top. All materials used to remove the contaminants, including any water used to rinse equipment, and all
dirt removed must be treated as contaminated. Textiles, such as from coveralls, may be sent to a certified laundry facility.
Waste must be disposed of according to the standards of Albemarle County and the Commonwealth of Virginia. Store
hazardous materials and wastes in covered containers.
Report all spills, leaks and discharges as follows: All spills, leaks, and discharges shall be recorded in the inspection logs.
If construction activity results in a discharge of contaminants that may be reasonably expected to enter surface waters, the
operator shall notify the Department of Environmental Quality immediately or within 24 hours, and shall submit a written
report within five days. For significant spills that cannot be controlled by personnel in the immediate vicinity, notify the
local emergency response by dialing 911. Albemarle County must also be notified, and potentially some of the following
agencies: the Fire Department, the Public Works Department, the Coast Guard, the Highway Patrol, the County Police
Department, Department of Toxic Substances, OSHA, etc. For spills of federal reportable quantities, in conformance with
the requirements in 40 CFR parts 110, 119, and 302, the contractor should notify the National Response Center at (800)
424-8802.
G. Pollution Prevention Awareness
The engineer, project superintendent, and contractor shall have weekly meetings to review on -site conditions and advise
contractor of potential risks that should be addressed. Contractor will be responsible for following procedures on a daily
basis and applying appropriate waste management and prevention practices to be in compliance with the conditions of the
general permit. Employees shall be informed of the danger to nature and to human health of various chemical spills.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 7. Discharges to impaired waters, surface waters within an applicable TMDL
wasteload allocation, and exceptional waters.
Water discharges into an impaired water: Rivanna River — Meadow Creek. Meadow Creek was listed as impaired due to
Benthic-Macroinvertebrate Bioassessments for E-Coli and Fecal Coliforms. Site work shall be in compliance with the
following requirements:
1. Permanent or temporary soil stabilization shall be applied to denuded areas within seven days after final grade
is reached on any portion of the site;
2. Nutrients shall be applied in accordance with manufacturer's recommendations or an approved nutrient
management plan and shall not be applied during rainfall events; and
3. In accordance with Part I B 4 and Part I B 5, inspections shall be conducted as follows:
I. Inspections shall be conducted at a frequency of (i) at least once every four business days or (ii) at least
once every five business days and no later than 48 hours following a measurable storm event. In the event
that a measurable storm event occurs when there are more than 48 hours between business days, the
inspection shall be conducted on the next business day; and
II. Representative inspections used by utility line installation, pipeline construction, or other similar linear
construction activities shall inspect all outfalls discharging to exceptional waters.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 8. Qualified personnel
The following personnel are responsible for inspections;
Contractor to be selected from list of qualified personnel. SWPPP shall be updated to list Qualified Personnel
when contractor is selected or during the preconstruction meeting, at the latest.
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 9. Signed Certification
CERTIFICATION
"I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment for knowing violations."
Owner/Operator Name: l
Company:C-�
Title: tC--
Signature:
Date: b
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 9. Signed Certification
CERTIFICATION
"I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment for knowing violations."
Owner/Operator Name:
Company:
Title:
Signature:
Date:
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Section 11. General permit copy
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
COMMONWEALTH of VIRGINIA
DEPARTMENT OF ENVIRONMENTAL QUALITY
General Permit No.: VAR10
Effective Date: July 1, 2019
Expiration Date: June 30, 2024
GENERAL VPDES PERMIT FOR DISCHARGES OF
STORMWATER FROM CONSTRUCTION ACTIVITIES
AUTHORIZATION TO DISCHARGE UNDER THE VIRGINIA STORMWATER MANAGEMENT
PROGRAM AND THE VIRGINIA STORMWATER MANAGEMENT ACT
In compliance with the provisions of the Clean Water Act, as amended, and pursuant to the
Virginia Stormwater Management Act and regulations adopted pursuant thereto, operators of
construction activities are authorized to discharge to surface waters within the boundaries of the
Commonwealth of Virginia, except those specifically named in State Water Control Board
regulations that prohibit such discharges.
The authorized discharge shall be in accordance with the registration statement filed with the
Department of Environmental Quality, this cover page, Part I - Discharge Authorization and
Special Conditions, Part II - Stormwater Pollution Prevention Plan, and Part III - Conditions
Applicable to All VPDES Permits as set forth in this general permit.
Construction General Permit
Effective July 1, 2019
Page 2 of 26
PART
DISCHARGE AUTHORIZATION AND SPECIAL CONDITIONS
A. Coverage under this general permit.
1. During the period beginning with the date of coverage under this general permit and lasting
until the general permit's expiration date, the operator is authorized to discharge stormwater
from construction activities.
2. This general permit also authorizes stormwater discharges from support activities (e.g.,
concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated
material disposal areas, borrow areas) located on -site or off -site provided that:
a. The support activity is directly related to the construction activity that is required to have
general permit coverage for discharges of stormwater from construction activities;
b. The support activity is not a commercial operation, nor does it serve multiple unrelated
construction activities by different operators;
c. The support activity does not operate beyond the completion of the last construction
activity it supports;
d. The support activity is identified in the registration statement at the time of general permit
coverage;
e. Appropriate control measures are identified in a stormwater pollution prevention plan and
implemented to address the discharges from the support activity areas; and
f. All applicable state, federal, and local approvals are obtained for the support activity.
B. Limitations on coverage.
1. Post -construction discharges. This general permit does not authorize stormwater discharges
that originate from the site after construction activities have been completed and the site,
including any support activity sites covered under the general permit registration, has
undergone final stabilization. Post -construction industrial stormwater discharges may need to
be covered by a separate VPDES permit.
2. Discharges mixed with nonstormwater. This general permit does not authorize discharges that
are mixed with sources of nonstormwater, other than those discharges that are identified in
Part I E (Authorized nonstormwater discharges) and are in compliance with this general
permit.
3. Discharges covered by another state permit. This general permit does not authorize
discharges of stormwater from construction activities that have been covered under an
individual permit or required to obtain coverage under an alternative general permit.
Page 3 of 26
4. Impaired waters and total maximum daily load (TMDL) limitation.
a. Nutrient and sediment impaired waters. Discharges of stormwater from construction
activities to surface waters identified as impaired in the 2016 § 305(b)/303(d) Water
Quality Assessment Integrated Report or for which a TMDL wasteload allocation has
been established and approved prior to the term of this general permit for (i) sediment
or a sediment -related parameter (i.e., total suspended solids or turbidity) or (ii)
nutrients (i.e., nitrogen or phosphorus) are not eligible for coverage under this general
permit unless the operator develops, implements, and maintains a stormwater
pollution prevention plan (SWPPP) in accordance with Part II B 5 of this permit that
minimizes the pollutants of concern and, when applicable, is consistent with the
assumptions and requirements of the approved TMDL wasteload allocations and
implements an inspection frequency consistent with Part II G 2 a.
b. Polychlorinated biphenyl (PCB) impaired waters. Discharges of stormwater from
construction activities that include the demolition of any structure with at least 10,000
square feet of floor space built or renovated before January 1, 1980, to surface waters
identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment
Integrated Report or for which a TMDL wasteload allocation has been established and
approved prior to the term of this general permit for PCB are not eligible for coverage
under this general permit unless the operator develops, implements, and maintains a
SWPPP in accordance with Part II B 6 of this permit that minimizes the pollutants of
concern and, when applicable, is consistent with the assumptions and requirements
of the approved TMDL wasteload allocations, and implements an inspection frequency
consistent with Part II G 2 a.
5. Exceptional waters limitation. Discharges of stormwater from construction activities not
previously covered under the general permit effective on July 1, 2014, to exceptional waters
identified in 9VAC25-260-30 A 3 c are not eligible for coverage under this general permit
unless the operator develops, implements, and maintains a SWPPP in accordance with Part
II B 7 of this permit and implements an inspection frequency consistent with Part II G 2 a.
6. There shall be no discharge of floating solids or visible foam in other than trace amounts.
C. Commingled discharges. Discharges authorized by this general permit may be commingled
with other sources of stormwater that are not required to be covered under a state permit, so long
as the commingled discharge is in compliance with this general permit. Discharges authorized by
a separate state or VPDES permit may be commingled with discharges authorized by this general
permit so long as all such discharges comply with all applicable state and VPDES permit
requirements.
D. Prohibition of nonstormwater discharges. Except as provided in Parts I A 2, 1 C, and I E, all
discharges covered by this general permit shall be composed entirely of stormwater associated
with construction activities. All other discharges including the following are prohibited:
1. Wastewater from washout of concrete;
2. Wastewater from the washout and cleanout of stucco, paint, form release oils, curing
compounds, and other construction materials;
Page 4 of 26
3. Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance;
4. Oils, toxic substances, or hazardous substances from spills or other releases; and
5. Soaps, solvents, or detergents used in equipment and vehicle washing.
E. Authorized nonstormwater discharges. The following nonstormwater discharges from
construction activities are authorized by this general permit when discharged in compliance with
this general permit:
1. Discharges from firefighting activities;
2. Fire hydrant flushings;
3. Waters used to wash vehicles or equipment where soaps, solvents, or detergents have not
been used and the wash water has been filtered, settled, or similarly treated prior to discharge;
4. Water used to control dust that has been filtered, settled, or similarly treated prior to discharge;
5. Potable water sources, including uncontaminated waterline flushings, managed in a manner
to avoid an instream impact;
6. Routine external building wash down where soaps, solvents or detergents have not been used
and the wash water has been filtered, settled, or similarly treated prior to discharge;
7. Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred
(or where all spilled or leaked material has been removed prior to washing); where soaps,
solvents, or detergents have not been used; and where the wash water has been filtered,
settled, or similarly treated prior to discharge;
8. Uncontaminated air conditioning or compressor condensate;
9. Uncontaminated ground water or spring water;
10. Foundation or footing drains where flows are not contaminated with process materials such
as solvents;
11. Uncontaminated excavation dewatering, including dewatering of trenches and excavations
that have been filtered, settled, or similarly treated prior to discharge; and
12. Landscape irrigation.
F. Termination of general permit coverage.
1. The operator of the construction activity shall submit a notice of termination in accordance
with 9VAC25-880-60, unless a registration statement was not required to be submitted in
accordance with 9VAC25-880-50 A 1 c or A 2 b for single-family detached residential
structures, to the VSMP authority after one or more of the following conditions have been met:
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a. Necessary permanent control measures included in the SWPPP for the site are in place
and functioning effectively and final stabilization has been achieved on all portions of the
site for which the operator has operational control. When applicable, long term
responsibility and maintenance requirements for permanent control measures shall be
recorded in the local land records prior to the submission of a complete and accurate
notice of termination and the construction record drawing prepared;
b. Another operator has assumed control over all areas of the site that have not been finally
stabilized and obtained coverage for the ongoing discharge;
c. Coverage under an alternative VPDES or state permit has been obtained; or
d. For individual lots in residential construction only, final stabilization as defined in 9VAC25-
880-1 has been completed, including providing written notification to the homeowner and
incorporating a copy of the notification and signed certification statement into the SWPPP,
and the residence has been transferred to the homeowner.
2. The notice of termination shall be submitted no later than 30 days after one of the above
conditions in subdivision 1 of this subsection is met.
3. Termination of authorization to discharge for the conditions set forth in subdivision 1 a of this
subsection shall be effective upon notification from the department that the provisions of
subdivision 1 a of this subsection have been met or 60 days after submittal of a complete and
accurate notice of termination in accordance with 9VAC25-880-60 C, whichever occurs first.
4. Authorization to discharge terminates at midnight on the date that the notice of termination is
submitted for the conditions set forth in subdivisions 1 b through 1 d of this subsection unless
otherwise notified by the VSMP authority or department.
5. The notice of termination shall be signed in accordance with Part III K of this general permit.
G. Water quality protection.
1. The operator shall select, install, implement, and maintain control measures as identified in
the SWPPP at the construction site that minimize pollutants in the discharge as necessary to
ensure that the operator's discharge does not cause or contribute to an excursion above any
applicable water quality standard.
2. If it is determined by the department that the operator's discharges are causing, have
reasonable potential to cause, or are contributing to an excursion above any applicable water
quality standard, the department, in consultation with the VSMP authority, may take
appropriate enforcement action and require the operator to:
a. Modify or implement additional control measures in accordance with Part II C to
adequately address the identified water quality concerns;
b. Submit valid and verifiable data and information that are representative of ambient
conditions and indicate that the receiving water is attaining water quality standards; or
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c. Submit an individual permit application in accordance with 9VAC25-870-410 B 3.
All written responses required under this chapter shall include a signed certification
consistent with Part II I K.
PART II
STORMWATER POLLUTION PREVENTION PLAN
A. Stormwater pollution prevent plan.
A stormwater pollution prevention plan (SWPPP) shall be developed prior to the submission
of a registration statement and implemented for the construction activity, including any support
activity, covered by this general permit. SWPPPs shall be prepared in accordance with good
engineering practices. Construction activities that are part of a larger common plan of
development or sale and disturb less than one acre may utilize a SWPPP template provided
by the department and need not provide a separate stormwater management plan if one has
been prepared and implemented for the larger common plan of development or sale.
2. The SWPPP requirements of this general permit may be fulfilled by incorporating by reference
other plans such as a spill prevention control and countermeasure (SPCC) plan developed for
the site under § 311 of the federal Clean Water Act or best management practices (BMP)
programs otherwise required for the facility provided that the incorporated plan meets or
exceeds the SWPPP requirements of Part II B. All plans incorporated by reference into the
SWPPP become enforceable under this general permit. If a plan incorporated by reference
does not contain all of the required elements of the SWPPP, the operator shall develop the
missing elements and include them in the SWPPP.
3. Any operator that was authorized to discharge under the general permit effective July 1, 2014,
and that intends to continue coverage under this general permit, shall update its stormwater
pollution prevention plan to comply with the requirements of this general permit no later than
60 days after the date of coverage under this general permit.
B. Contents. The SWPPP shall include the following items:
1. General information.
a. A signed copy of the registration statement, if required, for coverage under the general
VPDES permit for discharges of stormwater from construction activities;
b. Upon receipt, a copy of the notice of coverage under the general VPDES permit for
discharges of stormwater from construction activities (i.e., notice of coverage letter);
c. Upon receipt, a copy of the general VPDES permit for discharges of stormwater from
construction activities;
d. A narrative description of the nature of the construction activity, including the function of
the project (e.g., low density residential, shopping mall, highway, etc.);
e. A legible site plan identifying:
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(1) Directions of stormwater flow and approximate slopes anticipated after major grading
activities;
(2) Limits of land disturbance including steep slopes and natural buffers around surface
waters that will not be disturbed;
(3) Locations of major structural and nonstructural control measures, including sediment
basins and traps, perimeter dikes, sediment barriers, and other measures intended to
filter, settle, or similarly treat sediment, that will be installed between disturbed areas
and the undisturbed vegetated areas in order to increase sediment removal and
maximize stormwater infiltration;
(4) Locations of surface waters;
(5) Locations where concentrated stormwater is discharged;
(6) Locations of any support activities, including (i) areas where equipment and vehicle
washing, wheel wash water, and other wash water is to occur; (ii) storage areas for
chemicals such as acids, fuels, fertilizers, and other lawn care chemicals; (iii) concrete
wash out areas; (iv) vehicle fueling and maintenance areas; (v) sanitary waste
facilities, including those temporarily placed on the construction site; and (vi)
construction waste storage; and
(7) When applicable, the location of the on -site rain gauge or the methodology established
in consultation with the VSMP authority used to identify measurable storm events for
inspection as allowed by Part II G 2 a (1) (ii) or Part II G 2 b (2).
2. Erosion and sediment control plan.
a. An erosion and sediment control plan designed and approved in accordance with the
Virginia Erosion and Sediment Control Regulations (9VAC25-840), an "agreement in lieu
of a plan" as defined in 9VAC25-840-10 from the VESCP authority, or an erosion and
sediment control plan prepared in accordance with annual standards and specifications
approved by the department.
b. All erosion and sediment control plans shall include a statement describing the
maintenance responsibilities required for the erosion and sediment controls used.
c. An approved erosion and sediment control plan, "agreement in lieu of a plan," or erosion
and sediment control plan prepared in accordance with department -approved annual
standards and specifications, implemented to:
(1) Control the volume and velocity of stormwater runoff within the site to minimize soil
erosion;
(2) Control stormwater discharges, including peak flow rates and total stormwater volume,
to minimize erosion at outlets and to minimize downstream channel and stream bank
erosion;
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(3) Minimize the amount of soil exposed during the construction activity;
(4) Minimize the disturbance of steep slopes;
(5) Minimize sediment discharges from the site in a manner that addresses (i) the amount,
frequency, intensity, and duration of precipitation; (ii) the nature of resulting stormwater
runoff; and (iii) soil characteristics, including the range of soil particle sizes present on
the site;
(6) Provide and maintain natural buffers around surface waters, direct stormwater to
vegetated areas to increase sediment removal, and maximize stormwater infiltration,
unless infeasible;
(7) Minimize soil compaction and, unless infeasible, preserve topsoil;
(8) Ensure initiation of stabilization activities, as defined in 9VAC25-880-1, of disturbed
areas immediately whenever any clearing, grading, excavating, or other land -
disturbing activities have permanently ceased on any portion of the site, or temporarily
ceased on any portion of the site and will not resume for a period exceeding 14 days;
and
(9) Utilize outlet structures that withdraw stormwater from the surface (i.e., above the
permanent pool or wet storage water surface elevation), unless infeasible, when
discharging from sediment basins or sediment traps.
3. Stormwater management plan.
a. Except for those projects identified in Part II B 3 b, a stormwater management plan
approved by the VSMP authority as authorized under the Virginia Stormwater
Management Program (VSMP) Regulation (9VAC25-870), or an "agreement in lieu of a
stormwater management plan" as defined in 9VAC25-870-10 from the VSMP authority, or
a stormwater management plan prepared in accordance with annual standards and
specifications approved by the department.
b. For any operator meeting the conditions of 9VAC25-870-47 B of the VSMP regulation, an
approved stormwater management plan is not required. In lieu of an approved stormwater
management plan, the SWPPP shall include a description of, and all necessary
calculations supporting, all post -construction stormwater management measures that will
be installed prior to the completion of the construction process to control pollutants in
stormwater discharges after construction operations have been completed. Structural
measures should be placed on upland soils to the degree possible. Such measures must
be designed and installed in accordance with applicable VESCP authority, VSMP
authority, state, and federal requirements, and any necessary permits must be obtained.
4. Pollution prevention plan. A pollution prevention plan that addresses potential pollutant -
generating activities that may reasonably be expected to affect the quality of stormwater
discharges from the construction activity, including any support activity. The pollution
prevention plan shall:
a. Identify the potential pollutant -generating activities and the pollutant that is expected to be
exposed to stormwater;
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b. Describe the location where the potential pollutant -generating activities will occur, or if
identified on the site plan, reference the site plan;
c. Identify all nonstormwater discharges, as authorized in Part I E of this general permit, that
are or will be commingled with stormwater discharges from the construction activity,
including any applicable support activity;
d. Identify the person responsible for implementing the pollution prevention practice or
practices for each pollutant -generating activity (if other than the person listed as the
qualified personnel);
e. Describe the pollution prevention practices and procedures that will be implemented to:
(1) Prevent and respond to leaks, spills, and other releases including (i) procedures for
expeditiously stopping, containing, and cleaning up spills, leaks, and other releases;
and (ii) procedures for reporting leaks, spills, and other releases in accordance with
Part III G;
(2) Prevent the discharge of spilled and leaked fuels and chemicals from vehicle fueling
and maintenance activities (e.g., providing secondary containment such as spill
berms, decks, spill containment pallets, providing cover where appropriate, and having
spill kits readily available);
(3) Prevent the discharge of soaps, solvents, detergents, and wash water from
construction materials, including the clean-up of stucco, paint, form release oils, and
curing compounds (e.g., providing (i) cover (e.g., plastic sheeting or temporary roofs)
to prevent contact with stormwater; (ii) collection and proper disposal in a manner to
prevent contact with stormwater; and (iii) a similarly effective means designed to
prevent discharge of these pollutants);
(4) Minimize the discharge of pollutants from vehicle and equipment washing, wheel wash
water, and other types of washing (e.g., locating activities away from surface waters
and stormwater inlets or conveyance and directing wash waters to sediment basins or
traps, using filtration devices such as filter bags or sand filters, or using similarly
effective controls);
(5) Direct concrete wash water into a leak -proof container or leak -proof settling basin. The
container or basin shall be designed so that no overflows can occur due to inadequate
sizing or precipitation. Hardened concrete wastes shall be removed and disposed of
in a manner consistent with the handling of other construction wastes. Liquid concrete
wastes shall be removed and disposed of in a manner consistent with the handling of
other construction wash waters and shall not be discharged to surface waters;
(6) Minimize the discharge of pollutants from storage, handling, and disposal of
construction products, materials, and wastes including (i) building products such as
asphalt sealants, copper flashing, roofing materials, adhesives, and concrete
admixtures; (ii) pesticides, herbicides, insecticides, fertilizers, and landscape
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materials; and (iii) construction and domestic wastes such as packaging materials,
scrap construction materials, masonry products, timber, pipe and electrical cuttings,
plastics, Styrofoam, concrete, and other trash or building materials;
(7) Prevent the discharge of fuels, oils, and other petroleum products, hazardous or toxic
wastes, waste concrete, and sanitary wastes;
(8) Address any other discharge from the potential pollutant -generating activities not
addressed above;
(9) Minimize the exposure of waste materials to precipitation by closing or covering waste
containers during precipitation events and at the end of the business day, or
implementing other similarly effective practices. Minimization of exposure is not
required in cases where the exposure to precipitation will not result in a discharge of
pollutants; and
f. Describe procedures for providing pollution prevention awareness of all applicable wastes,
including any wash water, disposal practices, and applicable disposal locations of such
wastes, to personnel in order to comply with the conditions of this general permit. The
operator shall implement the procedures described in the SWPPP.
5. SWPPP requirements for discharges to nutrient and sediment impaired waters. For
discharges to surface waters (i) identified as impaired in the 2016 § 305(b)/303(d) Water
Quality Assessment Integrated Report or (ii) with an applicable TMDL wasteload allocation
established and approved prior to the term of this general permit for sediment for a sediment -
related parameter (i.e., total suspended solids or turbidity) or nutrients (i.e., nitrogen or
phosphorus), the operator shall:
a. Identify the impaired waters, approved TMDLs, and pollutants of concern in the SWPPP;
and
b. Provide clear direction in the SWPPP that:
(1) Permanent or temporary soil stabilization shall be applied to denuded areas within
seven days after final grade is reached on any portion of the site;
(2) Nutrients shall be applied in accordance with manufacturer's recommendations or an
approved nutrient management plan and shall not be applied during rainfall events;
and
(3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a.
6. SWPPP requirements for discharges to polychlorinated biphenyl (PCB) impaired waters. For
discharges from construction activities that include the demolition of any structure with at least
10,000 square feet of floor space built or renovated before January 1, 1980, to surface waters
(i) identified as impaired in the 2016 § 305(b)/303(d) Water Quality Assessment Integrated
Report or (ii) with an applicable TMDL wasteload allocation established and approved prior to
the term of this general permit for PCB, the operator shall:
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a. Identify the impaired waters, approved TMDI-s, and pollutant of concern in the SWPPP;
b. Implement the approved erosion and sediment control plan in accordance with Part II B 2;
c. Dispose of waste materials in compliance with applicable state, federal, and local
requirements; and
d. Implement a modified inspection schedule in accordance with Part II G 2 a.
7. SWPPP requirements for discharges to exceptional waters. For discharges to surface waters
identified in 9VAC25-260-30 A 3 c as an exceptional water, the operator shall:
a. Identify the exceptional surface waters in the SWPPP; and
b. Provide clear direction in the SWPPP that:
(1) Permanent or temporary soil stabilization shall be applied to denuded areas within
seven days after final grade is reached on any portion of the site;
(2) Nutrients shall be applied in accordance with manufacturer's recommendations or an
approved nutrient management plan and shall not be applied during rainfall events;
and
(3) A modified inspection schedule shall be implemented in accordance with Part II G 2 a.
8. Identification of qualified personnel. The name, phone number, and qualifications of the
qualified personnel conducting inspections required by this general permit.
9. Delegation of authority. The individuals or positions with delegated authority, in accordance
with Part III K, to sign inspection reports or modify the SWPPP.
10. SWPPP signature. The SWPPP shall be signed and dated in accordance with Part III K.
C. SWPPP amendments, modification, and updates.
1. The operator shall amend the SWPPP whenever there is a change in the design, construction,
operation, or maintenance that has a significant effect on the discharge of pollutants to surface
waters and that has not been previously addressed in the SWPPP.
2. The SWPPP shall be amended if, during inspections or investigations by the operator's
qualified personnel, or by local, state, or federal officials, it is determined that the existing
control measures are ineffective in minimizing pollutants in discharges from the construction
activity. Revisions to the SWPPP shall include additional or modified control measures
designed and implemented to correct problems identified. If approval by the VESCP authority,
VSMP authority, or department is necessary for the control measure, revisions to the SWPPP
shall be completed no later than seven calendar days following approval. Implementation of
these additional or modified control measures shall be accomplished as described in Part II
H.
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3. The SWPPP shall clearly identify the contractors that will implement and maintain each control
measure identified in the SWPPP. The SWPPP shall be amended to identify any new
contractor that will implement and maintain a control measure.
4. The operator shall update the SWPPP as soon as possible but no later than seven days
following any modification to its implementation. All modifications or updates to the SWPPP
shall be noted and shall include the following items:
a. A record of dates when:
(1) Major grading activities occur;
(2) Construction activities temporarily or permanently cease on a portion of the site; and
(3) Stabilization measures are initiated;
b. Documentation of replaced or modified controls where periodic inspections or other
information have indicated that the controls have been used inappropriately or incorrectly
and were modified;
c. Areas that have reached final stabilization and where no further SWPPP or inspection
requirements apply;
d. All properties that are no longer under the legal control of the operator and the dates on
which the operator no longer had legal control over each property;
e. The date of any prohibited discharges, the discharge volume released, and what actions
were taken to minimize the impact of the release;
f. Measures taken to prevent the reoccurrence of any prohibited discharge; and
g. Measures taken to address any evidence identified as a result of an inspection required
under Part II G.
5. Amendments, modifications, or updates to the SWPPP shall be signed in accordance with
Part III K.
D. Public notification. Upon commencement of land disturbance, the operator shall post
conspicuously a copy of the notice of coverage letter near the main entrance of the construction
activity. For linear projects, the operator shall post the notice of coverage letter at a publicly
accessible location near an active part of the construction project (e.g., where a pipeline crosses
a public road). The operator shall maintain the posted information until termination of general
permit coverage as specified in Part I F.
E. SWPPP availability.
1. Operators with day-to-day operational control over SWPPP implementation shall have a copy
of the SWPPP available at a central location on -site for use by those identified as having
responsibilities under the SWPPP whenever they are on the construction site.
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2. The operator shall make the SWPPP and all amendments, modifications, and updates
available upon request to the department, the VSMP authority, the EPA, the VESCP authority,
local government officials, or the operator of a municipal separate storm sewer system
receiving discharges from the construction activity. If an on -site location is unavailable to store
the SWPPP when no personnel are present, notice of the SWPPP's location shall be posted
near the main entrance of the construction site.
3. The operator shall make the SWPPP available for public review in an electronic format or in
hard copy. Information for public access to the SWPPP shall be posted and maintained in
accordance with Part II D. If not provided electronically, public access to the SWPPP may be
arranged upon request at a time and at a publicly accessible location convenient to the
operator or his designee but shall be no less than once per month and shall be during normal
business hours. Information not required to be contained within the SWPPP by this general
permit is not required to be released.
F. SWPPP implementation. The operator shall implement the SWPPP and subsequent
amendments, modifications, and updates from commencement of land disturbance until
termination of general permit coverage as specified in Part I F.
All control measures shall be properly maintained in effective operating condition in
accordance with good engineering practices and, where applicable, manufacturer
specifications. If a site inspection required by Part II G identifies a control measure that is not
operating effectively, corrective actions shall be completed as soon as practicable, but no later
than seven days after discovery or a longer period as established by the VSMP authority, to
maintain the continued effectiveness of the control measures.
2. If site inspections required by Part II G identify an existing control measure that needs to be
modified or if an additional or alternative control measure is necessary for any reason,
implementation shall be completed prior to the next anticipated measurable storm event. If
implementation prior to the next anticipated measurable storm event is impracticable, then
additional or alternative control measures shall be implemented as soon as practicable, but
no later than seven days after discovery or a longer period as established by the VSMP
authority.
G. SWPPP Inspections.
1. Personnel responsible for on -site and off -site inspections. Inspections required by this general
permit shall be conducted by the qualified personnel identified by the operator in the SWPPP.
The operator is responsible for ensuring that the qualified personnel conduct the inspection.
2. Inspection schedule.
a. For construction activities that discharge to a surface water identified in Part II B 5 and B
6 as impaired or having an approved TMDL or Part I B 7 as exceptional, the following
inspection schedule requirements apply:
(1) Inspections shall be conducted at a frequency of (i) at least once every four business
days or (ii) at least once every five business days and no later than 24 hours following
a measurable storm event. In the event that a measurable storm event occurs when
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there are more than 24 hours between business days, the inspection shall be
conducted on the next business day; and
(2) Representative inspections as authorized in Part II G 2 d shall not be allowed.
b. Except as specified in Part II G 2 a, inspections shall be conducted at a frequency of:
(1) At least once every five business days; or
(2) At least once every 10 business days and no later than 24 hours following a
measurable storm event. In the event that a measurable storm event occurs when
there are more than 24 hours between business days, the inspection shall be
conducted on the next business day.
c. Where areas have been temporarily stabilized or land -disturbing activities will be
suspended due to continuous frozen ground conditions and stormwater discharges are
unlikely, the inspection frequency described in Part II G 2 a and 2 b may be reduced to
once per month. If weather conditions (such as above freezing temperatures or rain or
snow events) make discharges likely, the operator shall immediately resume the regular
inspection frequency.
d. Except as prohibited in Part II G 2 a (2), representative inspections may be utilized for
utility line installation, pipeline construction, or other similar linear construction activities
provided that:
(1) Temporary or permanent soil stabilization has been installed and vehicle access may
compromise the temporary or permanent soil stabilization and potentially cause
additional land disturbance increasing the potential for erosion;
(2) Inspections occur on the same frequency as other construction activities;
(3) Control measures are inspected along the construction site 0.25 miles above and
below each access point (i.e., where a roadway, undisturbed right-of-way, or other
similar feature intersects the construction activity and access does not compromise
temporary or permanent soil stabilization); and
(4) Inspection locations are provided in the inspection report required by Part II G.
e. If adverse weather causes the safety of the inspection personnel to be in jeopardy, the
inspection may be delayed until the next business day on which it is safe to perform the
inspection. Any time inspections are delayed due to adverse weather conditions, evidence
of the adverse weather conditions shall be included in the SWPPP with the dates of
occurrence.
3. Inspection requirements.
a. As part of the inspection, the qualified personnel shall:
(1) Record the date and time of the inspection and, when applicable, the date and rainfall
amount of the last measurable storm event;
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(2) Record the information and a description of any discharges occurring at the time of
the inspection or evidence of discharges occurring prior to the inspection;
(3) Record any land -disturbing activities that have occurred outside of the approved
erosion and sediment control plan;
(4) Inspect the following for installation in accordance with the approved erosion and
sediment control plan, identification of any maintenance needs, and evaluation of
effectiveness in minimizing sediment discharge, including whether the control has
been inappropriately or incorrectly used:
(a) All perimeter erosion and sediment controls, such as silt fence;
(b) Soil stockpiles, when applicable, and borrow areas for stabilization or sediment
trapping measures;
(c) Completed earthen structures, such as dams, dikes, ditches, and diversions for
stabilization and effective impoundment or flow control;
(d) Cut and fill slopes;
(e) Sediment basins and traps, sediment barriers, and other measures installed to
control sediment discharge from stormwater;
(f) Temporary or permanent channels, flumes, or other slope drain structures
installed to convey concentrated runoff down cut and fill slopes;
(g) Storm inlets that have been made operational to ensure that sediment laden
stormwater does not enter without first being filtered or similarly treated; and
(h) Construction vehicle access routes that intersect or access paved or public roads
for minimizing sediment tracking;
(5) Inspect areas that have reached final grade or that will remain dormant for more than
14 days to ensure:
(a) Initiation of stabilization activities have occurred immediately, as defined in
9VAC25-880-1; and
(b) Stabilization activities have been completed within seven days of reaching grade
or stopping work;
(6) Inspect for evidence that the approved erosion and sediment control plan, "agreement
in lieu of a plan," or erosion and sediment control plan prepared in accordance with
department -approved annual standards and specifications has not been properly
implemented. This includes:
Page 16 of 26
(a) Concentrated flows of stormwater in conveyances such as rills, rivulets, or
channels that have not been filtered, settled, or similarly treated prior to discharge,
or evidence thereof;
(b) Sediment laden or turbid flows of stormwater that have not been filtered or settled
to remove sediments prior to discharge;
(c) Sediment deposition in areas that drain to unprotected stormwater inlets or catch
basins that discharge to surface waters. Inlets and catch basins with failing
sediment controls due to improper installation, lack of maintenance, or inadequate
design are considered unprotected;
(d) Sediment deposition on any property (including public and private streets) outside
of the construction activity covered by this general permit;
(e) Required stabilization has not been initiated or completed or is not effective on
portions of the site;
(f) Sediment basins without adequate wet or dry storage volume or sediment basins
that allow the discharge of stormwater from below the surface of the wet storage
portion of the basin;
(g) Sediment traps without adequate wet or dry storage or sediment traps that allow
the discharge of stormwater from below the surface of the wet storage portion of
the trap; and
(h) Land disturbance or sediment deposition outside of the approved area to be
disturbed;
(7) Inspect pollutant generating activities identified in the pollution prevention plan for the
proper implementation, maintenance, and effectiveness of the procedures and
practices;
(8) Identify any pollutant generating activities not identified in the pollution prevention plan;
and
(9) Identify and document the presence of any evidence of the discharge of pollutants
prohibited by this general permit.
4. Inspection report. Each inspection report shall include the following items:
a. The date and time of the inspection and, when applicable, the date and rainfall amount of
the last measurable storm event;
b. Summarized findings of the inspection;
c. The locations of prohibited discharges;
d. The locations of control measures that require maintenance;
Page 17 of 26
e. The locations of control measures that failed to operate as designed or proved inadequate
or inappropriate for a particular location;
f. The locations where any evidence identified under Part II G 3 a (6) exists;
g. The locations where any additional control measure is needed;
h. A list of corrective actions required (including any changes to the SWPPP that are
necessary) as a result of the inspection or to maintain permit compliance;
Documentation of any corrective actions required from a previous inspection that have not
been implemented; and
The date and signature of the qualified personnel and the operator or its duly authorized
representative.
5. The inspection report shall be included into the SWPPP no later than four business days after
the inspection is complete.
6. The inspection report and any actions taken in accordance with Part II shall be retained by
the operator as part of the SWPPP for at least three years from the date that general permit
coverage expires or is terminated. The inspection report shall identify any incidents of
noncompliance. Where an inspection report does not identify any incidents of noncompliance,
the report shall contain a certification that the construction activity is in compliance with the
SWPPP and this general permit. The report shall be signed in accordance with Part III K of
this general permit.
H. Corrective actions.
The operator shall implement the corrective actions identified as a result of an inspection as
soon as practicable but no later than seven days after discovery or a longer period as
approved by the VSMP authority. If approval of a corrective action by a regulatory authority
(e.g., VSMP authority, VESCP authority, or the department) is necessary, additional control
measures shall be implemented to minimize pollutants in stormwater discharges until such
approvals can be obtained.
2. The operator may be required to remove accumulated sediment deposits located outside of
the construction activity covered by this general permit as soon as practicable in order to
minimize environmental impacts. The operator shall notify the VSMP authority and the
department as well as obtain all applicable federal, state, and local authorizations,
approvals, and permits prior to the removal of sediments accumulated in surface waters
including wetlands.
Page 18 of 26
PART III
CONDITIONS APPLICABLE TO ALL VPDES PERMITS
NOTE: Discharge monitoring is not required for this general permit. If the operator chooses to
monitor stormwater discharges or control measures, the operator shall comply with the
requirements of subsections A, B, and C, as appropriate.
A. Monitoring.
Samples and measurements taken for the purpose of monitoring shall be representative of
the monitoring activity.
2. Monitoring shall be conducted according to procedures approved under 40 CFR Part 136 or
alternative methods approved by the U.S. Environmental Protection Agency, unless other
procedures have been specified in this general permit. Analyses performed according to test
procedures approved under 40 CFR Part 136 shall be performed by an environmental
laboratory certified under regulations adopted by the Department of General Services
(1 VAC30-45 or 1 VAC30-46).
3. The operator shall periodically calibrate and perform maintenance procedures on all
monitoring and analytical instrumentation at intervals that will ensure accuracy of
measurements.
B. Records.
1. Monitoring records and reports shall include:
a. The date, exact place, and time of sampling or measurements;
b. The individuals who performed the sampling or measurements;
c. The dates and times analyses were performed;
d. The individuals who performed the analyses;
e. The analytical techniques or methods used; and
f. The results of such analyses.
2. The operator shall retain records of all monitoring information, including all calibration and
maintenance records and all original strip chart recordings for continuous monitoring
instrumentation, copies of all reports required by this general permit, and records of all data
used to complete the registration statement for this general permit, for a period of at least
three years from the date of the sample, measurement, report or request for coverage. This
period of retention shall be extended automatically during the course of any unresolved
litigation regarding the regulated activity or regarding control standards applicable to the
operator, or as requested by the board.
C. Reporting monitoring results.
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1. The operator shall update the SWPPP to include the results of the monitoring as may be
performed in accordance with this general permit, unless another reporting schedule is
specified elsewhere in this general permit.
2. Monitoring results shall be reported on a discharge monitoring report (DMR); on forms
provided, approved or specified by the department; or in any format provided that the date,
location, parameter, method, and result of the monitoring activity are included.
3. If the operator monitors any pollutant specifically addressed by this general permit more
frequently than required by this general permit using test procedures approved under 40 CFR
Part 136 or using other test procedures approved by the U.S. Environmental Protection
Agency or using procedures specified in this general permit, the results of this monitoring shall
be included in the calculation and reporting of the data submitted in the DMR or reporting form
specified by the department.
4. Calculations for all limitations which require averaging of measurements shall utilize an
arithmetic mean unless otherwise specified in this general permit.
D. Duty to provide information. The operator shall furnish, within a reasonable time, any
information which the board may request to determine whether cause exists for terminating this
general permit coverage or to determine compliance with this general permit. The board,
department, EPA, or VSMP authority may require the operator to furnish, upon request, such
plans, specifications, and other pertinent information as may be necessary to determine the effect
of the wastes from his discharge on the quality of surface waters, or such other information as
may be necessary to accomplish the purposes of the CWA and the Virginia Stormwater
Management Act. The operator shall also furnish to the board, department, EPA, or VSMP
authority, upon request, copies of records required to be kept by this general permit.
E. Compliance schedule reports. Reports of compliance or noncompliance with, or any progress
reports on, interim and final requirements contained in any compliance schedule of this general
permit shall be submitted no later than 14 days following each schedule date.
F. Unauthorized stormwater discharges. Pursuant to § 62.1-44.5 of the Code of Virginia, except
in compliance with a state permit issued by the department, it shall be unlawful to cause a
stormwater discharge from a construction activity.
G. Reports of unauthorized discharges. Any operator who discharges or causes or allows a
discharge of sewage, industrial waste, other wastes or any noxious or deleterious substance or a
hazardous substance or oil in an amount equal to or in excess of a reportable quantity established
under either 40 CFR Part 110, 40 CFR Part 117, 40 CFR Part 302, or § 62.1-44.34:19 of the Code
of Virginia that occurs during a 24-hour period into or upon surface waters or who discharges or
causes or allows a discharge that may reasonably be expected to enter surface waters, shall
notify the Department of Environmental Quality of the discharge immediately upon discovery of
the discharge, but in no case later than within 24 hours after said discovery. A written report of
the unauthorized discharge shall be submitted to the department and the VSMP authority within
five days of discovery of the discharge. The written report shall contain:
1. A description of the nature and location of the discharge;
2. The cause of the discharge;
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3. The date on which the discharge occurred;
4. The length of time that the discharge continued;
5. The volume of the discharge;
6. If the discharge is continuing, how long it is expected to continue;
7. If the discharge is continuing, what the expected total volume of the discharge will be; and
8. Any steps planned or taken to reduce, eliminate and prevent a recurrence of the present
discharge or any future discharges not authorized by this general permit.
Discharges reportable to the department and the VSMP authority under the immediate reporting
requirements of other regulations are exempted from this requirement.
H. Reports of unusual or extraordinary discharges. If any unusual or extraordinary discharge
including a "bypass" or "upset," as defined in this general permit, should occur from a facility and
the discharge enters or could be expected to enter surface waters, the operator shall promptly
notify, in no case later than within 24 hours, the department and the VSMP authority by telephone
after the discovery of the discharge. This notification shall provide all available details of the
incident, including any adverse effects on aquatic life and the known number of fish killed. The
operator shall reduce the report to writing and shall submit it to the department and the VSMP
authority within five days of discovery of the discharge in accordance with Part III 12. Unusual
and extraordinary discharges include any discharge resulting from:
1. Unusual spillage of materials resulting directly or indirectly from processing operations;
2. Breakdown of processing or accessory equipment;
3. Failure or taking out of service of some or all of the facilities; and
4. Flooding or other acts of nature.
I. Reports of noncompliance. The operator shall report any noncompliance which may adversely
affect surface waters or may endanger public health.
1. An oral report to the department and the VSMP authority shall be provided within 24 hours
from the time the operator becomes aware of the circumstances. The following shall be
included as information that shall be reported within 24 hours under this subdivision:
a. Any unanticipated bypass; and
b. Any upset that causes a discharge to surface waters.
2. A written report shall be submitted within five days and shall contain:
a. A description of the noncompliance and its cause;
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b. The period of noncompliance, including exact dates and times, and if the noncompliance
has not been corrected, the anticipated time it is expected to continue; and
c. Steps taken or planned to reduce, eliminate, and prevent reoccurrence of the
noncompliance.
The department may waive the written report on a case -by -case basis for reports of
noncompliance under Part III I if the oral report has been received within 24 hours and no
adverse impact on surface waters has been reported.
3. The operator shall report all instances of noncompliance not reported under Part II I 1 1 or 2 in
writing as part of the SWPPP. The reports shall contain the information listed in Part 111 12.
NOTE: The reports required in Part III G, H and I shall be made to the department and the VSMP
authority. Reports may be made by telephone, email, or by fax. For reports outside normal working
hours, leaving a recorded message shall fulfill the immediate reporting requirement. For
emergencies, the Virginia Department of Emergency Management maintains a 24-hour telephone
service at 1-800-468-8892.
4. Where the operator becomes aware of a failure to submit any relevant facts, or submittal of
incorrect information in any report, including a registration statement, to the department or the
VSMP authority, the operator shall promptly submit such facts or correct information.
J. Notice of planned changes.
1. The operator shall give notice to the department and the VSMP authority as soon as possible
of any planned physical alterations or additions to the permitted facility or activity. Notice is
required only when:
a. The operator plans an alteration or addition to any building, structure, facility, or installation
that may meet one of the criteria for determining whether a facility is a new source in
9VAC25-870-420;
b. The operator plans an alteration or addition that would significantly change the nature or
increase the quantity of pollutants discharged. This notification applies to pollutants that
are not subject to effluent limitations in this general permit; or
2. The operator shall give advance notice to the department and VSMP authority of any planned
changes in the permitted facility or activity, which may result in noncompliance with state
permit requirements.
K. Signatory requirements.
1. Registration statement. All registration statements shall be signed as follows:
a. For a corporation: by a responsible corporate officer. For the purpose of this chapter, a
responsible corporate officer means: (i) a president, secretary, treasurer, or vice-president
of the corporation in charge of a principal business function, or any other person who
performs similar policy -making or decision -making functions for the corporation; or (ii) the
manager of one or more manufacturing, production, or operating facilities, provided the
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manager is authorized to make management decisions that govern the operation of the
regulated facility including having the explicit or implicit duty of making major capital
investment recommendations, and initiating and directing other comprehensive measures
to assure long-term compliance with environmental laws and regulations; the manager
can ensure that the necessary systems are established or actions taken to gather
complete and accurate information for state permit application requirements; and where
authority to sign documents has been assigned or delegated to the manager in
accordance with corporate procedures;
b. For a partnership or sole proprietorship: by a general partner or the proprietor,
respectively; or
c. For a municipality, state, federal, or other public agency: by either a principal executive
officer or ranking elected official. For purposes of this chapter, a principal executive officer
of a public agency includes (i) the chief executive officer of the agency or (ii) a senior
executive officer having responsibility for the overall operations of a principal geographic
unit of the agency.
2. Reports and other information. All reports required by this general permit, including SWPPPs,
and other information requested by the board or the department shall be signed by a person
described in Part III K 1 or by a duly authorized representative of that person. A person is a
duly authorized representative only if:
a. The authorization is made in writing by a person described in Part III K 1;
b. The authorization specifies either an individual or a position having responsibility for the
overall operation of the regulated facility or activity such as the position of plant manager,
operator of a well or a well field, superintendent, position of equivalent responsibility, or
an individual or position having overall responsibility for environmental matters for the
operator. (A duly authorized representative may thus be either a named individual or any
individual occupying a named position); and
c. The signed and dated written authorization is included in the SWPPP. A copy shall be
provided to the department and VSMP authority, if requested.
3. Changes to authorization. If an authorization under Part III K 2 is no longer accurate because
a different individual or position has responsibility for the overall operation of the construction
activity, a new authorization satisfying the requirements of Part III K 2 shall be submitted to
the VSMP authority as the administering entity for the board prior to or together with any
reports or information to be signed by an authorized representative.
4. Certification. Any person signing a document under Part III K 1 or 2 shall make the following
certification:
5. "1 certify under penalty of law that I have read and understand this document and that this
document and all attachments were prepared in accordance with a system designed to assure
that qualified personnel properly gathered and evaluated the information submitted. Based on
my inquiry of the person or persons who manage the system, or those persons directly
responsible for gathering the information, the information submitted is, to the best of my
knowledge and belief, true, accurate, and complete. I am aware that there are significant
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penalties for submitting false information, including the possibility of fine and imprisonment for
knowing violations."
L. Duty to comply. The operator shall comply with all conditions of this general permit. Any state
permit noncompliance constitutes a violation of the Virginia Stormwater Management Act and the
Clean Water Act, except that noncompliance with certain provisions of this general permit may
constitute a violation of the Virginia Stormwater Management Act but not the Clean Water Act.
Permit noncompliance is grounds for enforcement action; for state permit coverage, termination,
revocation and reissuance, or modification; or denial of a state permit renewal application.
The operator shall comply with effluent standards or prohibitions established under § 307(a)
of the Clean Water Act for toxic pollutants within the time provided in the regulations that establish
these standards or prohibitions or standards for sewage sludge use or disposal, even if this
general permit has not yet been modified to incorporate the requirement.
M. Duty to reapply. If the operator wishes to continue an activity regulated by this general permit
after the expiration date of this general permit, the operator shall submit a new registration
statement at least 60 days before the expiration date of the existing general permit, unless
permission for a later date has been granted by the board. The board shall not grant permission
for registration statements to be submitted later than the expiration date of the existing general
permit.
N. Effect of a state permit. This general permit does not convey any property rights in either real
or personal property or any exclusive privileges, nor does it authorize any injury to private property
or invasion of personal rights, or any infringement of federal, state or local law or regulations.
O. State law. Nothing in this general permit shall be construed to preclude the institution of any
legal action under, or relieve the operator from any responsibilities, liabilities, or penalties
established pursuant to any other state law or regulation or under authority preserved by § 510 of
the Clean Water Act. Except as provided in general permit conditions on "bypassing" (Part III U)
and "upset" (Part III V), nothing in this general permit shall be construed to relieve the operator
from civil and criminal penalties for noncompliance.
P. Oil and hazardous substance liability. Nothing in this general permit shall be construed to
preclude the institution of any legal action or relieve the operator from any responsibilities,
liabilities, or penalties to which the operator is or may be subject under §§ 62.1-44.34:14 through
62.1-44.34:23 of the State Water Control Law or § 311 of the Clean Water Act.
Q. Proper operation and maintenance. The operator shall at all times properly operate and
maintain all facilities and systems of treatment and control (and related appurtenances), which
are installed or used by the operator to achieve compliance with the conditions of this general
permit. Proper operation and maintenance also includes effective plant performance, adequate
funding, adequate staffing, and adequate laboratory and process controls, including appropriate
quality assurance procedures. This provision requires the operation of back-up or auxiliary
facilities or similar systems, which are installed by the operator only when the operation is
necessary to achieve compliance with the conditions of this general permit.
R. Disposal of solids or sludges. Solids, sludges or other pollutants removed in the course of
treatment or management of pollutants shall be disposed of in a manner so as to prevent any
pollutant from such materials from entering surface waters and in compliance with all applicable
state and federal laws and regulations.
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S. Duty to mitigate. The operator shall take all steps to minimize or prevent any discharge in
violation of this general permit that has a reasonable likelihood of adversely affecting human
health or the environment.
T. Need to halt or reduce activity not a defense. It shall not be a defense for an operator in an
enforcement action that it would have been necessary to halt or reduce the permitted activity in
order to maintain compliance with the conditions of this general permit.
U. Bypass.
1. "Bypass," as defined in 9VAC25-870-10, means the intentional diversion of waste streams
from any portion of a treatment facility. The operator may allow any bypass to occur that does
not cause effluent limitations to be exceeded, but only if it also is for essential maintenance to
ensure efficient operation. These bypasses are not subject to the provisions of Part I I I U 2 and
3.
2. Notice.
a. Anticipated bypass. If the operator knows in advance of the need for a bypass, the
operator shall submit prior notice to the department, if possible at least 10 days before the
date of the bypass.
b. Unanticipated bypass. The operator shall submit notice of an unanticipated bypass as
required in Part III I.
3. Prohibition of bypass.
a. Except as provided in Part III U 1, bypass is prohibited, and the board or department may
take enforcement action against an operator for bypass unless:
(1) Bypass was unavoidable to prevent loss of life, personal injury, or severe property
damage. Severe property damage means substantial physical damage to property,
damage to the treatment facilities that causes them to become inoperable, or
substantial and permanent loss of natural resources that can reasonably be expected
to occur in the absence of a bypass. Severe property damage does not mean
economic loss caused by delays in production;
(2) There were no feasible alternatives to the bypass, such as the use of auxiliary
treatment facilities, retention of untreated wastes, or maintenance during normal
periods of equipment downtime. This condition is not satisfied if adequate back-up
equipment should have been installed in the exercise of reasonable engineering
judgment to prevent a bypass that occurred during normal periods of equipment
downtime or preventive maintenance; and
(3) The operator submitted notices as required under Part III U 2.
b. The department may approve an anticipated bypass, after considering its adverse effects,
if the department determines that it will meet the three conditions listed in Part III U 3 a.
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V. Upset
1. An "upset," as defined in 9VAC25-870-10, means an exceptional incident in which there is
unintentional and temporary noncompliance with technology -based state permit effluent
limitations because of factors beyond the reasonable control of the operator. An upset does
not include noncompliance to the extent caused by operational error, improperly designed
treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or
careless or improper operation.
2. An upset constitutes an affirmative defense to an action brought for noncompliance with
technology -based state permit effluent limitations if the requirements of Part III V 4 are met.
A determination made during administrative review of claims that noncompliance was caused
by upset, and before an action for noncompliance, is not a final administrative action subject
to judicial review.
3. An upset does not include noncompliance to the extent caused by operational error,
improperly designed treatment facilities, inadequate treatment facilities, lack of preventative
maintenance, or careless or improper operation.
4. An operator who wishes to establish the affirmative defense of upset shall demonstrate,
through properly signed, contemporaneous operating logs or other relevant evidence that:
a. An upset occurred and that the operator can identify the cause of the upset;
b. The permitted facility was at the time being properly operated;
c. The operator submitted notice of the upset as required in Part III I; and
d. The operator complied with any remedial measures required under Part III S.
5. In any enforcement proceeding, the operator seeking to establish the occurrence of an upset
has the burden of proof.
W. Inspection and entry. The operator shall allow the department as the board's designee, the
VSMP authority, EPA, or an authorized representative of either entity (including an authorized
contractor), upon presentation of credentials and other documents as may be required by law to:
1. Enter upon the operator's premises where a regulated facility or activity is located or
conducted, or where records shall be kept under the conditions of this general permit;
2. Have access to and copy, at reasonable times, any records that shall be kept under the
conditions of this general permit;
3. Inspect and photograph at reasonable times any facilities, equipment (including monitoring
and control equipment), practices, or operations regulated or required under this general
permit; and
4. Sample or monitor at reasonable times, for the purposes of ensuring state permit compliance
or as otherwise authorized by the Clean Water Act or the Virginia Stormwater Management
Act, any substances or parameters at any location.
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For purposes of this section, the time for inspection shall be deemed reasonable during regular
business hours, and whenever the facility is discharging. Nothing contained herein shall make an
inspection unreasonable during an emergency.
X. State permit actions. State permit coverage may be modified, revoked and reissued, or
terminated for cause. The filing of a request by the operator for a state permit modification,
revocation and reissuance, or termination, or a notification of planned changes or anticipated
noncompliance does not stay any state permit condition.
Y. Transfer of state permit coverage.
1. State permits are not transferable to any person except after notice to the department. Except
as provided in Part III Y 2, a state permit may be transferred by the operator to a new operator
only if the state permit has been modified or revoked and reissued, or a minor modification
made, to identify the new operator and incorporate such other requirements as may be
necessary under the Virginia Stormwater Management Act and the Clean Water Act.
2. As an alternative to transfers under Part III Y 1, this state permit may be automatically
transferred to a new operator if:
a. The current operator notifies the department at least 30 days in advance of the proposed
transfer of the title to the facility or property;
b. The notice includes a written agreement between the existing and new operators
containing a specific date for transfer of state permit responsibility, coverage, and liability
between them; and
c. The department does not notify the existing operator and the proposed new operator of
its intent to modify or revoke and reissue the state permit. If this notice is not received, the
transfer is effective on the date specified in the agreement mentioned in Part III Y 2 b.
3. For ongoing construction activity involving a change of operator, the new operator shall accept
and maintain the existing SWPPP, or prepare and implement a new SWPPP prior to taking
over operations at the site.
Z. Severability. The provisions of this general permit are severable, and if any provision of this
general permit or the application of any provision of this state permit to any circumstance, is held
invalid, the application of such provision to other circumstances and the remainder of this general
permit shall not be affected thereby.
Section 12. Inspection logs
Issued — 10/2014 Stormwater Pollution Prevention Plan (SWPPP) Albemarle County
Eco Villaqe SWPPP Gradinq Loq
Inspection:
Date Time
Instructions: Fill out this sheet as grading events occur. Record grading events and their respective locations on this
log.
Summary:
Event on record: Location(s) on Site:
• Major Grading Activities:
• Construction Activities Cease:
o Temporarily:
o Permanently:
• Stabilization Measures Initiated:
• Other Grading Activity Notes:
Inspector Signature Date Operator Signature Date
Eco Village SWPPP Inspection Log
Inspection:
Last Rainfall:
Date Time Date Rainfall Amount
Summary (requirements on back of sheet):
Locations of:
• Prohibited discharges
• Controls needing maintenance
• Failed controls:
• Evidence that ESCP has not been properly implemented:
• Additional measures needed:
Corrective actions required:
Unimplemented corrective actions from previous inspection:
Inspector Signature Date Operator Signature Date
"If this report does not identify any incidents of non-compliance, I certify that the construction activity is in compliance with
the SWPPP and Construction General Permit."
Inspections shall be completed at least once every 5 business days and no later than 48 hours following a measurable storm
event. In the event that a measurable storm event occurs when there are more than 48 hours between business days, the
inspection shall be conducted on the next business day. Representative inspections used by utility line installation, pipeline
construction, or other similar linear construction activities shall inspect all outfalls discharging to exceptional waters. Where
an inspection report does not identify any incidents of non-compliance, the report shall contain a certification that the
construction activity is in compliance with the SWPPP and general permit.
Inspection requirements:
Describe discharges at time of inspection
Record land -disturbing activities outside approved ESCP
Inspect proper installation, maintenance needs, and effectiveness of:
— Perimeter controls, such as silt fence
— Soil stockpiles and borrow areas
Completed earthen structures (dams, dikes, ditches, diversions, etc.)
Cut and fill slopes
Sediment basins and traps, sediment barriers, etc.
Channels, flumes, slope drains, etc.
Operational storm inlets
— Construction vehicle access routes
Areas at final grade or to remain dormant for more than 14 days:
Initiate stabilization activities
Complete stabilization activities within 7 days of stopping work
Evidence that ESCP has not been properly implemented:
Concentrated flows of stormwater in conveyances such as rills, rivulets or channels that have not been filtered,
settled, or similarly treated prior to discharge, or evidence thereof;
Sediment laden or turbid flows of stormwater that have not been filtered or settled to remove sediments
prior to discharge;
Sediment deposition in areas that drain to unprotected stormwater inlets or catch basins that discharge to
surface waters. Inlets and catch basins with failing sediments controls due to improper installation, lack of
maintenance, or inadequate design are considered unprotected;
— Sediment deposition on any property (including public and private streets) outside of the construction activity
covered by this general permit;
Required stabilization has not been initiated or completed on portions of the site;
— Sediment basins without adequate wet or dry storage volume or sediment basins that allow the discharge of
stormwater from below the surface of the wet storage portion of the basin;
— Sediment traps without adequate wet or dry storage or sediment traps that allow the discharge of stormwater
from below the surface of the wet storage portion of the trap; and
Land disturbance outside of the approved area to be disturbed
Pollutant generating activities from PPP: implementation, maintenance, and effectiveness
Pollutant generating activities not identified in PPP