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STANDARDS AND SPECIFICATIONS
UMANSKY
OF CHARL
I. VIRGINIA DEPARTMENT OF TRANSPORTATION (V.D.O.T.) ROAD AND BRIDGE SPECIFICATIONS, DATED 2007.
2. VIRGINIA DEPARTMENT OF TRANSPORTATION (V.D.O.T.) ROAD AND BRIDGE STANDARDS, DATED 2008.
3. VIRGINIA DEPARTMENT OF TRANSPORTATION (V.D.O.T.) WORK AREA PROTECTION MANUAL, DATED 2011.
4. VIRGINIA DEPARTMENT OF CONSERVATION AND RECREATION, DIVISION OF SOIL AND WATER CONSERVATION, VIRGINIA EROSION
AND SEDIMENT CONTROL HANDBOOK, THIRD EDITION, 1992.
5. INSTITUTE OF TRANSPORTATION ENGINEERS (ITE MANUAL), TRIP GENERATION, 8TH EDITION.
5. VIRGINIA MANUAL FOR UNIFORM TRAFFIC CONTROL DEVICES (MUTCD) STANDARDS, DATED 2009.
7. ALBEMARLE COUNTY SERVICE AUTHORITY CONSTRUCTION SPECIFICATIONS REGULATING THE CONSTRUCTION AND
EXPANSION OF THE WATER AND SEWER SYSTEMS WITHIN THE COUNTY OF ALBEMARLE, VIRGINIA, DATED 2005.
B. INTERNATIONAL CODE COUNCIL AMERICAN NATIONAL STANDARD- ACCESSIBLE & USABLE BUILDINGSAND FACILITIES, DATED
2003.
SURVEYOR'S LEGEND
BORE HOLE
BENCH MARK
CLEAN OUT
DUCTILE IRON PIPE
SANITARY SEWER MANHOLE
IRON FOUND
MONUMENT FOUND
PIPE FOUND
P-K NAIL SET
SIGN
WATER METER
WATER VALVE
= 24" OAK W/ 40' CANOPY DIA.
AINTENANCE NOTES
UTILITIES LEGEND
GAS LINE
G
PHONE LINE
UGT
OVERHEAD ELECTRIC
OHE
SANITARY SEWER
S
UNDERGROUND ELECTRIC-
UGE
WATER LINE
W
EX. STORM DRAIN LINE
PROP. STORM DRAIN LINE
DEMOLITION LEGEND
TBS
TO BE SAVED
TBR
TO BE REMOVED
EX.
EXISTING
SITE ELEMENT TO BE REMOVED
�X11
TREE TO BE REMOVED
- x
UTILITY LINE TO BE REMOVED
GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH SIGNIFICANT
�INFALL. THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR.
THE INLET PROTECTION WILL BE CHECKED REGULARLY FOR SEDIMENT CLEANOUT
THE GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP WHICH WOULD PREVENT DRAINAGE.
IF THE GRAVEL IS CLOGGED BY SEDIMENT, IT SHALL BE REMOVED AND CLEANED OR REPLACED.
THE SILT FENCE BARRIER WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC.
SEDIMENT SHALL BE REMOVED WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF
THE BARRIER.
THE SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHALL
BE FERTILIZED AND RESEEDED AS DETERMINED NECESSARY BY VIRGINIA TECH SITE DEVELOPMENT DEPARTMENT.
OTTESVI LLE
ALBEMARLE COUNTY, VIRGINIA
WPO/VSMP AMENDMENT
(WP02021 -OOOXX )
MAY 30, 2021
FINAL APPROVAL
EROSION & SEDIMENT CONTROL NOTES
1. 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 , THIRD EDITION (1992) AND VIRGINIA
REGULATIONS VR 625-02-00 EROSION AND SEDIMENT CONTROL REGULATIONS.
2. 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.
3. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN CLEARING. THE CITY OF CHARLOTTESVILLE E&S INSPECTOR MUST BE CALLED (434-970-3182) IMMEDIATELY AFTER INITIAL MEASURES ARE IN PLACE AND BEFORE
THE START OF ANY FURTHER CONSTRUCTION.
4. A COPY OF THE APPROVED EROSION AND SEDIMENT CONTROL PLAN AND NARRATIVE 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 LIMITED TO, OFF -SITE BORROW OR WASTE AREAS), THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY EROSION CONTROL PLAN TO
THE OWNER FOR REVIEW 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 SHALL 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, 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 OF SLIDES, SINKING, OR COLLAPSE.
13. 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 OF 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 MILLE STRAW MULCH IS TO BE APPLIED AT 80LBS/1000SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE CITY OF CHARLOTTESVILLE E & S INSPECTOR.
14. 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 TURF TYPE TALL FESCUE. STRAW MULCH IS TO BE APPLIED
AT 80LBS/1000SF. ALTERNATIVES ARE SUBJECT TO APPROVED BY THE CITY OF CHARLOTTESVILLE E & S INSPECTOR.
15. MAINTENANCE: ALL MEASURES ARE TO BE INSPECTED WEEKLY AND AFTER EACH RAINFALL. ANY DAMAGE OR CLOGGING TO STRUCTURAL MEASURES IS TO BE REPAIR IMMEDIATELY. SILT TRAPS ARE TO BE CLEANED WHEN 50% OF THE WET 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 DIKES WHICH ARE COLLECTING SEDIMENT TO HALF THEIR HEIGHT MUST BE CLEANED AND REPAIRED IMMEDIATELY.
16. 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 CITY OF CHARLOTTESVILLE E & S INSPECTOR.
CONSTRUCTION SEQUENCE
1. CLEARLY MARK LIMITS OF WORK.
2. INSTALL CONSTRUCTION ENTRANCE AND INLET PROTECTION ON EXISTING DROP INLET ADJACENT TO CONSTRUCTION ENTRANCE AS SHOWN ON THE PLAN. UTILIZE NEARBY FIRE HYDRANT FOR TIRE WASHING.
3. INSTALL PERIMETER SILT FENCING, INLET PROTECTION, AND ALL OTHER PERIMETER MEASURES AS SHOWN ON THE PLAN.
4. ESTABLISH STAGING AREA AND STOCKPILE AREA AS SHOWN ON PLAN.
5. RE-ROUTE WATERLINE AND GAS LINE AS SHOWN ON THE PLANS. MAINTAIN EROSION CONTROL AT DOWNHILL PERIMETER OF UTILITY TRENCH.
6. ONCE WATER AND GAS UTILITIES ARE RE-ROUTED, PERFORM SITE DEMOLITION FOR THE BUILDING EXPANSION.
7. ADJUST SITE GRADES AND PARKING LOT LAYOUT AS SHOWN ON THE APPROVED SITE PLAN.
B. INSTALL ALL OTHER SITE PLAN UTILITIES.
9. AS FINAL GRADES ARE REACHED, INSTALL BASE GRAVEL AND CURBING IN AREAS TO BE PAVED AND BEGIN ESTABLISHMENT OF VEGETATION ON ALL DISTURBED TURF AREAS WITH PERMANENT SEEDING OR SODDING, MULCHING, FERTILIZATION,
AND LIMING. AMEND SOILS WHERE NEEDED. CONSULT WITH LANDSCAPE ARCHITECT BEFORE ESTABLISHING VEGETATION.
10. ONCE REMAINDER OF SITE HAS BEEN DEEMED STABILIZED BY THE COUNTY INSPECTOR AND ALL CONSTRUCTION ACTIVITIES ARE COMPLETED, RESTORE STAGING AND ACCESS AREAS TO ACCEPTABLE (PRE -CONSTRUCTION) CONDITIONS, INSTALL
PLANTINGS, AND REMOVE ALL OTHER EROSION CONTROL MEASURES.
E&SC MEASURES
CE CONSTRUCTION ENTRANCE E&SC STD. 3.02
TS TEMPORARY SEEDING E&SC STD. 3.31
SF SILT FENCE E&SC STD. 3.06 SF
PS PERMANENT SEEDING E&SC STD. 3.32
IP INLET PROTECTION E&SC STD. 3.07 ®
MULCHING E&SC STD. 3.35
TO TOPSOILING E&SC STD. 3.30
STABILIZATION MATTING ES&C STD. 3.36
OC DUST CONTROL E&SC STD. 3.39
SOILS INFO:
SOILS GROUP 39D - HAZEL LOAM, 15 TO 25%SLOPES
SOILS GROUP 93D - WATT CHANNERY SILT LOAM, 15 TO 25%SLOPES
APPROVALS:
ENGINEER
waterstreetstudio
landscape architecture I civil engineering
418 E Main Street 434.295.8177 Charlottesville, VA 22902
TH OF' ,
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Alan G. Franklin
Lic. No. 35326 w
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��IPISIIONAL ��
NOT FOR CONSTRUCTION
professional seal
ALAN FRANKLIN
project manager
project team
UMANSKY SUBARU
OF CHARLOTTESVILLE
project name
UMANSKY AUTO GROUP
client
960 HILTON HEIGHTS ROAD
CHARLOTTESVILLE, VA 22901
project address
project number
WPO/VSMP AMENDMENT
project phase
JULY 27, 2021
issue date
1.07.26.21 COUNTY SITE REVIEW COMMENTS
revisions
WPO COVER SHEET
sheet title
EC100
sheet number
EROSION & SEDIMENT CONTROL NARRATIVE
PROJECT DESCRIPTION
THE PROJECT PROPOSES EXPANSION OF THE SUBARU SALES/SERVICE BUILDING INTO THE PARKING/DISPLAY AREA TO THE WEST OF THE EXISTING
BUILDING.
THE SITE IS 6.16 ACRES. IT IS ZONED HC, HIGHWAY COMMERCIAL, AND HAS BEEN THE SITE OF THREE CAR DEALERSHIPS/SERVICE CENTERS SINCE
2005. PER THE PREVIOSLY APPROVED SITE PLAN, THERE ARE 190,997 SQUARE FEET OF IMPERVIOUS SURFACE COVER ON THE SITE. AFTER THE
PROPOSED SITE PLAN AMENDMENT, THE IMPERVIOUS COVER WOULD DECREASE BY 100 SQUARE FEET AS A RESULT OF A SLIGHT REDUCTION OF
PARKING/CIRCULATION AREA. DUE TO THE DECREASE IN IMPERVIOUS AREA ON SITE THERE WILL BE NO INCREASE IN STORMWATER RUNOFF TO THE
EXISTING STORMWATER INFRASTURCTURE ON -SITE OR DOWNSTREAM OF THE SITE SO NO STORMWATER QUANTITY ATTENUATION IS PROPOSED. AS
PART OF THE PREVIOUSLY APPROVED SITE PLAN, AN ANALYSIS WAS PERFORMED, REVIEWED, AND APPROVED PROVING ADEQUACY OF THE
EXISTING DOWNSTREAM STORM INFRASTRUCTURE WHICH IS IN CLOSE PROXIMITY OF DISCHARGE INTO THE RIVANNA RIVER. TWO EXISTING FILTERRA,
STORMWATER QUALITY UNITS WILL BE REMOVED AS PART OF THE SITE PLAN AMENDMENT. THE LOST PHOSPHORUS REMOVAL FROM THE THESE TWO
FILTERRA UNITS WILL BE RE -CALCULATED USING THE VRRM SPREADSHET AND NUTRIENT CREDITS WILL BE PURCHASED TO SATISFY STORMWATER
QUALITY REQUIREMENTS.
THERE WILL BE 0.57 ACRES OF DISTURBANCE ASSOCIATED WITH THIS PROJECT.
SITE CONSTRUCTION WILL BEGIN IN OCTOBER OF 2021 AND CONCLUDE BY THE END OF JUNE 2022.
EXISTING CONDITIONS
THE PROJECT SITE CONSISTS OF THREE PARCELS. THE TWO PARCELS ASSOCIATED WITH EXISTING CAR WASH ARE ALMOST ENTIRELY IMPERVIOUS. THE
TOPOGRAPHY OF THESE TWO PARCELS IS STEEP CONSIDERING THEIR DEGREE OF IMPERVIOUSNESS. THE THIRD PARCEL IS A COMBINATION OF
IMPERVIOUS AND PERVIOUS AREAS. THE IMPERVIOUS AREAS ARE FLAT BUT THE PERVIOUS AREAS INCLUDE AREAS OF STEEP TERRAIN. OVERALL,
EXISTING STORM RUNOFF SHEETS ACROSS THESE PARCELS TOWARD THE CORNER OF LONG STREET AND LANDONIA CIRCLE TO AN EXISTING CITY
STORM DRAIN SYSTEM IN THE LONG STREET R.O.W.
ADJACENT AREAS
THE LOWER PORTION OF THE SITE FRONTING ON LONG STREET IS SURROUNDED ON BOTH SIDES BY SIMILAR, HIGHLY IMPERVIOUS COMMERCIAL
DEVELOPMENT AND UPPER PORTION OF THE SITE IS SURROUNDED BY MEDIUM DENSITY RESIDENTIAL. THIS SITE IS HIGHLY VISIBLE AND SHOULD BE
PROTECTED FROM EROSION DURING CONSTRUCTION ACCORDINGLY.
OFF -SITE AREAS
AREAS AROUND THE PERIMETER OF THE SITE, WITHIN THE CITY R.O.W., WILL BE GRADED AND IMPROVED. DUE TO THE STEEP TOPOGRAPHY, THE SITE
WILL REQUIRE LARGE REMOVAL OF EARTHEN MATERIALS TO CREATE A FLATTER SITE. THESE MATERIALS WILL NEED TO BE TRUCKED OFF THE SITE EITHER
PERMANENTLY OR TEMPORARILY TO ATTAIN FINAL GRADE ELEVATIONS. THESE MATERIALS MUST BE STORED OR DISPOSED OF ON A SITE WITH AN
APPROVED EROSION AND SEDIMENT CONTROL PLAN IN PLACE AND MUST BE COORDINATED WITH THE CITY OF CHARLOTTESVILLE E & S INSPECTOR.
SOILS
PER THE USDA WEB SITE, SOILS ON -SITE ARE IDENTIFIED AS (91) URBAN LAND AND (171 D) RABUNLEN URBAN LAND COMPLEX, 15 TO 20 PERCENT
SLOPES. SOILS GROUP 171 D IS HYDRAULIC SOILS GROUP B AND SOILS GROUP 91 IS UNRATED.
CRITICAL AREAS
THE PROJECT AREA IS SMALL AND THE DISTURBED AREAS WILL BE QUICKLY STABILIZED WITH GRAVEL BASE. THE REMAINING AREAS ARE SMALL AND
EASILY STABILIZED WITH VEGETATION THAT EROSION PROBLEMS ARE NOT ANTICIPATED AND EROSION PROTECTION SHOULD BE EASILY
ACCOMPLISHED.
EROSION AND SEDIMENT CONTROL MEASURES
UNLESS OTHERWISE INDICATED, ALL EROSION AND SEDIMENT CONTROL PRACTICES WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO
MINIMUM STANDARDS AND SPECIFICATIONS OF THE VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, THIRD EDITION (1992).
1. TEMPORARY CONSTRUCTION ENTRANCE - E&S STD. & SPEC. 3.02
A TEMPORARY CONSTRUCTION ENTRANCE SHALL BE INSTALLED WHERE INDICATED. THE CONSTRUCTION ENTRANCE SHALL BE PAVED WITH A
WASH RACK.
2. SILT FENCE - E&S STD. & SPEC. 3.05
SILT FENCE SHALL BE INSTALLED IN A SEQUENCED MANNER AS SHOWN ON THE PLAN.
3. INLET PROTECTION - E&S STD. & SPEC. 3.07
INLET PROTECTION SHALL BE INSTALLED AROUND STORM DRAIN DROP OR CURB INLETS TO PREVENT SEDIMENT FROM ENTERING STORM
DRAINAGE SYSTEMS PRIOR TO PERMANENT STABILIZATION OF THE DISTURBED AREA.
4. TEMPORARY DIVERSION DIKE - E&S STD. & SPEC. 3.09
A TEMPORARY RIDGE OR BERM OF COMPACTED SOIL TO DIRECT RUNOFF TO A SEDIMENT TRAPPING MEASURE.
5. TEMPORARY SEDIMENT TRAP - E&S STD. & SPEC. 3.13
A TEMPORARY SEDIMENT TRAP SHALL BE INSTALLED WHERE INDICATED ON THE PLANS. SEE ATTACHED CALCULATIONS FOR SIZING AND THE
TABLE ON THE PLANS FOR DIMENSION SPECIFICATIONS.
6. TOPSOILING - E&S STD. & SPEC. 3.30
TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILE LOCATIONS SHALL BE LOCATED ON -SITE
AND ARE TO BE STABILIZED WITH TEMPORARY VEGETATION. SELECTION OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR IT IS APPLIED.
PRIOR TO LAND -DISTURBING ACTIVITIES, THE CONTRACTOR SHALL SUBMIT A SUPPLEMENTARY E & S PLAN TO THE OWNER COVERING THE OFF -SITE
STOCKPILE AREA WHICH WOULD HAVE TO BE APPROVED BY THE PLAN APPROVING AUTHORITY BEFORE ANY OFF -SITE ACTIVITY COMMENCES.
7. TEMPORARY SEEDING: E&S STD. & SPEC. 3.31
ALL AREAS DISTURBED BY CONSTRUCTION THAT WILL NOT BE BROUGHT TO FINAL GRADE FOR A PERIOD OF MORE THAN 30 DAYS WILL BE
STABILIZED WITH TEMPORARY SEEDING. UNLESS OTHERWISE SPECIFIED, TEMPORARY SEEDING WILL BE DONE WITH A SEED MIX APPROVED BY THE
OWNER PRIOR TO APPLICATION IN ACCORDANCE TO E&S STD. AND SPEC. 3.31 OF THE 1992 VIRGINIA EROSION AND SEDIMENT CONTROL
HANDBOOK, THIRD EDITION (1992).
8. PERMANENT SEEDING: E&S STD. & SPEC. 3.32
ALL AREAS DISTURBED BY CONSTRUCTION WILL BE STABILIZED WITH PERMANENT SEEDING IMMEDIATELY FOLLOWING THE CONCLUSION OF
CLEARING OPERATIONS. UNLESS OTHERWISE SPECIFIED, PERMANENT SEEDING WILL BE DONE WITH A SEED MIX APPROVED BY THE OWNER PRIOR
TO APPLICATION IN ACCORDANCE TO E&S STD. AND SPEC. 3.32 OF THE 1992 VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK, THIRD
EDITION (1992).
9. MULCHING: E&S STD. & SPEC. 3.35
AREAS WHICH HAVE BEEN PERMANENTLY SEEDED SHOULD BE MULCHED IMMEDIATELY FOLLOWING SEEDING.
10. DUST CONTROL - E&S STD. & SPEC. 3.39
DUST CONTROL PRACTICES SHALL BE EMPLOYED TO PREVENT SURFACE AND AIR MOVEMENT OF DUST FROM EXPOSED SOIL SURFACES AND
REDUCE THE PRESENCE OF AIRBORNE SUBSTANCES WHICH MAY BE HARMFUL OR INJURIOUS TO HUMAN HEALTH, WELFARE, OR SAFETY, OR TO
ANIMAL OR PLANT LIFE.
MANAGEMENT STRATEGIES
1. CONSTRUCTION SHOULD BE SEQUENCED SO THAT GRADING OPERATIONS CAN BEGIN AND END AS QUICKLY AS POSSIBLE.
2. THE SITE CONTRACTOR SHALL BE RESPONSIBLE FOR THE INSTALLATION AND MAINTENANCE OF ALL EROSION AND SEDIMENT CONTROL
PRACTICES.
3. SEDIMENT TRAPPING MEASURES SHALL BE INSTALLED AS A FIRST STEP IN GRADING AND SHALL BE SEEDED AND MULCHED IMMEDIATELY
FOLLOWING INSTALLATION.
4. AREAS WHICH ARE NOT TO BE DISTURBED SHALL BE CLEARLY MARKED BY FLAGS, SIGNS, ETC.
5. TEMPORARY SEEDING OR OTHER STABILIZATION WILL FOLLOW IMMEDIATELY AFTER GRADING.
6. AFTER ACHIEVING ADEQUATE STABILIZATION, THE TEMPORARY E&S CONTROLS WILL BE CLEANED UP AND REMOVED, AND THE SEDIMENT BASINS
WILL BE CLEANED OUT AND CONVERTED TO PERMANENT STORMWATER MANAGEMENT BASINS IF APPLICABLE.
SOIL STOCKPILES AND BORROW AREAS
TOPSOIL WILL BE STRIPPED FROM AREAS TO BE GRADED AND STOCKPILED FOR LATER USE. STOCKPILE LOCATIONS SHALL BE LOCATED ON -SITE AND
ARE TO BE STABILIZED WITH TEMPORARY VEGETATION. SELECTION OF THE SEED MIXTURE WILL DEPEND ON THE TIME OF YEAR IT IS APPLIED. NO
OFF -SITE AREAS WILL BE DISTURBED AS PART OF THIS PROJECT.
CONSTRUCTION SEQUENCE
1. CLEARLY MARK LIMITS OF WORK.
2. INSTALL CONSTRUCTION ENTRANCE AND INLET PROTECTION ON EXISTING DROP INLET ADJACENT TO CONSTRUCTION ENTRANCE AS
SHOWN ON THE PLAN. UTILIZE NEARBY FIRE HYDRANT FOR TIRE WASHING.
3. INSTALL PERIMETER SILT FENCING, INLET PROTECTION, AND ALL OTHER PERIMETER MEASURES AS SHOWN ON THE PLAN.
4. ESTABLISH STAGING AREA AND STOCKPILE AREA AS SHOWN ON PLAN.
5. RE-ROUTE WATERLINE AND GAS LINE AS SHOWN ON THE PLANS. MAINTAIN EROSION CONTROL AT DOWNHILL PERIMETER OF UTILITY
TRENCH.
6. ONCE WATER AND GAS UTILITIES ARE RE-ROUTED, PERFORM SITE DEMOLITION FOR THE BUILDING EXPANSION.
7. ADJUST SITE GRADES AND PARKING LOT LAYOUT AS SHOWN ON THE APPROVED SITE PLAN.
8. INSTALL ALL OTHER SITE PLAN UTILITIES.
9. AS FINAL GRADES ARE REACHED, INSTALL BASE GRAVEL AND CURBING IN AREAS TO BE PAVED AND BEGIN ESTABLISHMENT OF
VEGETATION ON ALL DISTURBED TURF AREAS WITH PERMANENT SEEDING OR SODDING, MULCHING, FERTILIZATION, AND LIMING.
AMEND SOILS WHERE NEEDED. CONSULT WITH LANDSCAPE ARCHITECT BEFORE ESTABLISHING VEGETATION.
10. ONCE REMAINDER OF SITE HAS BEEN DEEMED STABILIZED BY THE COUNTY INSPECTOR AND ALL CONSTRUCTION ACTIVITIES ARE
COMPLETED, RESTORE STAGING AND ACCESS AREAS TO ACCEPTABLE (PRE -CONSTRUCTION) CONDITIONS, INSTALL PLANTINGS, AND
REMOVE ALL OTHER EROSION CONTROL MEASURES.
MAINTENANCE
IN GENERAL, ALL EROSION AND SEDIMENT CONTROL MEASURES WILL BE CHECKED DAILY AND AFTER EACH RUNOFF PRODUCING RAINFALL EVENT.
THE FOLLOWING ITEMS WILL BE CHECKED IN PARTICULAR:
1. THE GRAVEL OUTLETS WILL BE CHECKED REGULARLY FOR SEDIMENT BUILDUP. IF THE GRAVEL IS CLOGGED BY SEDIMENT, IT SHALL BE REMOVED
AND CLEANED OR REPLACED.
2. THE INLET PROTECTION WILL BE CHECKED REGULARLY FOR SEDIMENT CLEANOUT.
3. THE SILT FENCE BARRIER WILL BE CHECKED REGULARLY FOR UNDERMINING OR DETERIORATION OF THE FABRIC. SEDIMENT SHALL BE REMOVED
WHEN THE LEVEL OF SEDIMENT DEPOSITION REACHES HALF WAY TO THE TOP OF THE BARRIER.
4. THE SEEDED AREAS WILL BE CHECKED REGULARLY TO ENSURE THAT A GOOD STAND IS MAINTAINED. AREAS SHALL BE FERTILIZED AND RESEEDED
AS DETERMINED NECESSARY BY THE CITY OF CHARLOTTESVILLE E & S INSPECTOR IN ACCORDANCE WITH THE VIRGINIA EROSION & SEDIMENT
CONTROL HANDBOOK, THIRD EDITION (1992).
THE CONTRACTOR SHALL BE RESPONSIBLE FOR THE INSTALLATION, MAINTENANCE, AND REMOVAL OF ALL EROSION AND SEDIMENT CONTROL
PRACTICES AND RESTORATION OF ANY DAMAGED AREAS DURING CONSTRUCTION AND FOR ANY WARRANTY PERIOD.
VEGETATIVE PRACTICES
AFTER THE MAJORITY OF THE GRADING PROGRAM HAS BEEN EXECUTED THEY SHOULD BE REDRESSED WITH AN AMPLE DEPTH OF TOPSOIL FROM THE
STOCKPILE AND SURFACE ROUGHENED. THEREAFTER, PERMANENT SEEDING AND MULCH SHOULD BE APPLIED. IF FOR SOME REASON,
CONSTRUCTION IS HALTED OR DELAYED, EXPOSED AREAS ARE TO BE TREATED WITH TEMPORARY SEEDING AND MULCH UNTIL SUCH TIME AS
CONSTRUCTION BEGINS.
PERMANENT STABILIZATION
AS MENTIONED ABOVE, PERMANENT SEEDING, LIME, FERTILIZATION, AND MULCHING IS TO BE APPLIED TO ALL AREAS NOT PROPOSED FOR
HARDSCAPE OR BUILDING IMPROVEMENTS AS SOON AS POSSIBLE UNLESS OTHERWISE SPECIFIED ON THE LANDSCAPE PLAN. SEEDING SHALL BE
DONE WITH KENTUCKY 31 TALL FESCUE ACCORDING TO STD. & SPEC. 3.32, PERMANENT SEEDING OF THE HANDBOOK. EROSION CONTROL
BLANKETS WILL BE INSTALLED OVER FILL SLOPES WHICH HAVE BEEN BROUGHT TO FINAL GRADE AND HAVE BEEN SEEDED TO PROTECT THE SLOPES
FROM RILL AND GULLY EROSION AND TO ALLOW SEED TO GERMINATE PROPERLY. MULCH (STRAW OR FIBER) WILL BE USED ON RELATIVELY FLAT
AREAS. IN ALL SEEDING OPERATIONS, SEED FERTILIZER AND LIME WILL BE APPLIED PRIOR TO MULCHING.
MINIMUM STANDARDS
INSTALLATION OF ALL EROSION AND SEDIMENT CONTROL MEASURES SHALL CONFORM TO THE 1992 VIRGINIA EROSION AND SEDIMENT CONTROL
HANDBOOK, THIRD EDITION (1992). CRITICAL MEASURES REQUIRED ON THIS PROJECT ARE SUMMARIZED BELOW:
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. TEMPORARY SOIL STABILIZATION SHALL BE APPLIED WITHIN SEVEN DAYS TO DENUDED AREAS THAT MAY NOT BE
AT FINAL GRADE BUT WILL REMAIN DORMANT FOR LONGER THAN 30 DAYS. PERMANENT STABILIZATION SHALL BE APPLIED TO AREAS THAT ARE
TO BE LEFT DORMANT FOR MORE THAN ONE YEAR.
2. DURING CONSTRUCTION OF THE PROJECT, SOIL STOCKPILES AND BORROW AREAS SHALL BE STABILIZED OR PROTECTED WITH SEDIMENT
TRAPPING MEASURES. THE APPLICANT IS RESPONSIBLE FOR THE TEMPORARY PROTECTION AND PERMANENT STABILIZATION OF ALL SOIL
STOCKPILES ON SITE AS WELL AS BORROWS AREAS AND SOIL INTENTIONALLY TRANSPORTED FROM THE PROJECT SITE.
3. A PERMANENT VEGETATIVE COVER SHALL BE ESTABLISHED ON DENUDED AREAS NOT OTHERWISE PERMANENTLY STABILIZED. PERMANENT
VEGETATION SHALL NOT BE CONSIDERED ESTABLISHED UNTIL A GROUND COVER IS ACHIEVED THAT, IS UNIFORM, MATURE ENOUGH TO SURVIVE
AND WILL INHIBIT EROSION.
4. SEDIMENT BASINS AND TRAPS, PERIMETER DIKES, SEDIMENT BARRIERS AND OTHER MEASURES INTENDED TO TRAP SEDIMENT SHALL BE
CONSTRUCTED AS A FIRST STEP IN ANY LAND -DISTURBING ACTIVITY AND SHALL BE MADE FUNCTIONAL BEFORE UPSLOPE LAND DISTURBANCE
TAKES PLACE.
5. STABILIZATION MEASURES SHALL BE APPLIED TO EARTHEN STRUCTURES SUCH AS DAMS, DIKES AND DIVERSIONS IMMEDIATELY AFTER
INSTALLATION.
6. SEDIMENT TRAPS SHALL BE DESIGNED AND CONSTRUCTED BASED UPON THE TOTAL DRAINAGE AREA TO BE SERVED BY THE TRAP OR BASIN.
a. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT TRAP SHALL BE 134 CUBIC YARDS PER ACRE OF DRAINAGE AREA AND THE TRAP SHALL
ONLY CONTROL DRAINAGE AREAS LESS THAN THREE ACRES.
b. SURFACE RUNOFF FROM DISTURBED AREAS THAT IS COMPRISED OF FLOW FROM DRAINAGE AREAS GREATER THAN OR EQUAL TO THREE
ACRES SHALL BE CONTROLLED BY A SEDIMENT BASIN. THE MINIMUM STORAGE CAPACITY OF A SEDIMENT BASIN SHALL BE 134 CUBIC YARDS
PER ACRE OF DRAINAGE AREA. THE OUTFALL SYSTEM SHALL, AT A MINIMUM, MAINTAIN THE STRUCTURAL INTEGRITY OF THE BASIN DURING A
TWENTY-FIVE YEAR STORM OF 24-HOUR DURATION. RUNOFF COEFFICIENTS USED IN RUNOFF CALCULATIONS SHALL CORRESPOND TO A BARE
EARTH CONDITION OR THOSE CONDITIONS EXPECTED TO EXIST WHILE THE SEDIMENT BASIN IS UTILIZED.
7. CUT AND FILL SLOPES SHALL BE DESIGNED AND CONSTRUCTED IN A MANNER THAT WILL MINIMIZE EROSION. SLOPES THAT ARE FOUND TO BE
ERODING EXCESSIVELY WITHIN ONE YEAR OF PERMANENT STABILIZATION SHALL BE PROVIDED WITH ADDITIONAL SLOPE STABILIZING MEASURES
UNTIL THE PROBLEM IS CORRECTED.
8. CONCENTRATED RUNOFF SHALL NOT FLOW DOWN CUT OR FILL SLOPES UNLESS CONTAINED WITHIN AN ADEQUATE TEMPORARY OR PERMANENT
CHANNEL, FLUME OR SLOPE DRAIN STRUCTURE.
9. WHENEVER WATER SEEPS FROM A SLOPE FACE, ADEQUATE DRAINAGE OR OTHER PROTECTION SHALL BE PROVIDED.
10. ALL STORM SEWER INLETS THAT ARE MADE OPERABLE DURING CONSTRUCTION SHALL BE PROTECTED SO THAT SEDIMENT -LADEN WATER CANNOT
ENTER THE CONVEYANCE SYSTEM WITHOUT FIRST BEING FILTERED OR OTHERWISE TREATED TO REMOVE SEDIMENT.
11. BEFORE NEWLY CONSTRUCTED STORMWATER CONVEYANCE CHANNELS OR PIPES ARE MADE OPERATIONAL, ADEQUATE OUTLET PROTECTION
AND ANY REQUIRED TEMPORARY OR PERMANENT CHANNEL LINING SHALL BE INSTALLED IN BOTH THE CONVEYANCE CHANNEL AND RECEIVING
CHANNEL.
12. WHEN WORK IN A LIVE WATERCOURSE IS PERFORMED, PRECAUTIONS SHALL BE TAKEN TO MINIMIZE ENCROACHMENT, CONTROL SEDIMENT
TRANSPORT AND STABILIZE THE WORK AREA TO THE GREATEST EXTENT POSSIBLE DURING CONSTRUCTION. NON -ERODIBLE MATERIAL SHALL BE
USED FOR THE CONSTRUCTION OF CAUSEWAYS AND COFFERDAMS. EARTHEN FILL MAY BE USED FOR THE STRUCTURES IF ARMORED BY
NON -ERODIBLE COVER MATERIALS.
13. WHEN A LIVE WATERCOURSE MUST BE CROSSED BY CONSTRUCTION VEHICLES MORE THAN TWICE IN ANY SIX-MONTH PERIOD, A TEMPORARY
VEHICULAR STREAM CROSSING CONSTRUCTED OF NON -ERODIBLE MATERIAL SHALL BE PROVIDED.
14. ALL APPLICABLE FEDERAL, STATE AND LOCAL REGULATIONS PERTAINING TO WORKING IN OR CROSSING LIVE WATERCOURSES SHALL BE MET.
15. THE BED AND BANKS OF A WATERCOURSE SHALL BE STABILIZED IMMEDIATELY AFTER WORK IN THE WATERCOURSE IS COMPLETED.
16. UNDERGROUND UTILITY LINES SHALL BE INSTALLED IN ACCORDANCE WITH THE FOLLOWING STANDARDS IN ADDITION TO OTHER APPLICABLE
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.
a. EFFLUENT FROM DEWATERING OPERATIONS SHALL BE FILTERED OR PASSED THROUGH APPROVED SEDIMENT TRAPPING DEVICE, OR BOTH,
AND DISCHARGED IN A MANNER THAT DOES NOT ADVERSELY AFFECT FLOWING STREAMS OR OFF -SITE PROPERTY.
d. MATERIAL USED FOR BACKFILLING TRENCHES SHALL BE PROPERLY COMPACTED IN ORDER TO MINIMIZE EROSION AND PROMOTE
STABILIZATION.
e. RESTABILIZATION SHALL BE ACCOMPLISHED IN ACCORDANCE WITH THESE REGULATIONS.
f. APPLICABLE SAFETY REGULATIONS SHALL BE COMPLIED WITH.
17. WHERE CONSTRUCTION VEHICLE ACCESS ROUTES INTERSECT PAVED OR PUBLIC ROADS, PROVISIONS SHALL BE MADE TO MINIMIZE THE
TRANSPORT OF SEDIMENT BY VEHICULAR TRACKING ONTO THE PAVED SURFACE. WHERE SEDIMENT IS TRANSPORTED ONTO A PAVED OR PUBLIC
ROAD SURFACE, THE ROAD SURFACE SHALL BE CLEANED THOROUGHLY AT THE END OF EACH DAY. SEDIMENT SHALL BE REMOVED FROM THE
ROADS BY SHOVELING OR SWEEPING AND TRANSPORTED TO A SEDIMENT CONTROL DISPOSAL AREA. STREET WASHING SHALL BE ALLOWED
ONLY AFTER SEDIMENT IS REMOVED IN THIS MANNER. THIS PROVISION SHALL APPLY TO INDIVIDUAL DEVELOPMENT LOTS AS WELL AS TO LARGER
LAND -DISTURBING ACTIVITIES.
18. ALL TEMPORARY EROSION AND SEDIMENT CONTROL MEASURES SHALL BE REMOVED WITHIN 30 DAYS AFTER FINAL SITE STABILIZATION OR AFTER
THE TEMPORARY MEASURES ARE NO LONGER NEEDED, UNLESS OTHERWISE AUTHORIZED BY THE LOCAL PROGRAM AUTHORITY. TRAPPED
SEDIMENT AND THE DISTURBED SOIL AREAS RESULTING FROM THE DISPOSITION OF TEMPORARY MEASURES SHALL BE PERMANENTLY STABILIZED TO
PREVENT FURTHER EROSION AND SEDIMENTATION.
19. STORMWATER RUNOFF CONSIDERATION (MS-19)
PROPERTIES AND WATERWAYS DOWNSTREAM FROM DEVELOPMENT SITES SHALL BE PROTECTED FROM SEDIMENT DEPOSITION, EROSION AND
DAMAGE DUE TO INCREASES IN VOLUME, VELOCITY AND PEAK FLOW RATE OF STORMWATER RUNOFF FOR THE STATED FREQUENCY STORM OF
24-HOUR DURATION IN ACCORDANCE WITH THE FOLLOWING STANDARDS AND CRITERIA:
a. CONCENTRATED STORMWATER RUNOFF LEAVING A DEVELOPMENT SITE SHALL BE DISCHARGED DIRECTLY INTO AN ADEQUATE NATURAL OR
MAN-MADE RECEIVING CHANNEL, PIPE OR STORM SEWER SYSTEM. FOR THOSE SITES WHERE RUNOFF IS DISCHARGED INTO A PIPE OR PIPE
SYSTEM, DOWNSTREAM STABILITY ANALYSES AT THE OUTFALL OF THE PIPE OR PIPE SYSTEM SHALL BE PERFORMED.
b. ADEQUACY OF ALL CHANNELS AND PIPES SHALL BE VERIFIED IN THE FOLLOWING MANNER:
(1) THE APPLICANT SHALL DEMONSTRATE THAT THE TOTAL DRAINAGE AREA TO THE POINT OF ANALYSIS WITHIN THE CHANNEL IS ONE HUNDRED
TIMES GREATER THAN THE CONTRIBUTING DRAINAGE AREA OF THE PROJECT IN QUESTION; OR
(2) (A) NATURAL CHANNELS SHALL BE ANALYZED BY THE USE OF A TWO-YEAR STORM TO VERIFY THAT STORMWATER WILL NOT OVERTOP
CHANNEL BANKS NOR CAUSE EROSION OF CHANNEL BED OR BANKS; AND
(b) ALL PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS SHALL BE ANALYZED BY THE USE OF A TEN-YEAR STORM TO VERIFY THAT
STORMWATER WILL NOT OVERTOP ITS BANKS AND BY THE USE OF A TWO-YEAR STORM TO DEMONSTRATE THAT STORMWATER WILL NOT
CAUSE EROSION OF CHANNEL BED OR BANKS; AND
(C) PIPES AND STORM SEWER SYSTEMS SHALL BE ANALYZED BY THE USE OF A TEN-YEAR STORM TO VERIFY THAT STORMWATER WILL BE
CONTAINED WITHIN THE PIPE OR SYSTEM.
C. IF EXISTING NATURAL RECEIVING CHANNELS OR PREVIOUSLY CONSTRUCTED MAN-MADE CHANNELS OR PIPES ARE NOT ADEQUATE, THE
APPLICANT SHALL:
(1) IMPROVE THE CHANNEL TO A CONDITION WHERE A TEN-YEAR STORM WILL NOT OVERTOP THE BANKS AND A TWO-YEAR STORM WILL NOT
CAUSE EROSION TO THE CHANNEL BED OR BANKS; OR
(2) IMPROVE THE PIPE OR PIPE SYSTEM TO A CONDITION WHERE THE TEN-YEAR STORM IS CONTAINED WITHIN THE APPURTENANCES; OR
(3) DEVELOP A SITE DESIGN THAT WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TWO-YEAR STORM TO INCREASE WHEN
RUNOFF OUTFALLS INTO A NATURAL CHANNEL OR WILL NOT CAUSE THE PRE -DEVELOPMENT PEAK RUNOFF RATE FROM A TEN-YEAR STORM
TO INCREASE WHEN RUNOFF OUTFALLS INTO A MAN-MADE CHANNEL; OR
(4) PROVIDE A COMBINATION OF CHANNEL IMPROVEMENT, STORM WATER DETENTION OR OTHER MEASURES WHICH IS SATISFACTORY TO THE
PLAN -APPROVING AUTHORITY TO PREVENT DOWNSTREAM EROSION.
d. THE APPLICANT SHALL PROVIDE EVIDENCE OF PERMISSION TO MAKE THE IMPROVEMENTS.
e. ALL HYDROLOGIC ANALYSES SHALL BE BASED ON THE EXISTING WATERSHED CHARACTERISTICS AND THE ULTIMATE DEVELOPMENT OF THE
SUBJECT PROJECT.
f. IF THE APPLICANT CHOOSES AN OPTION THAT INCLUDES STORM WATER DETENTION HE SHALL OBTAIN APPROVAL FROM THE LOCALITY OF A
PLAN FOR MAINTENANCE OF THE DETENTION FACILITIES. THE PLAN SHALL SET FORTH THE MAINTENANCE REQUIREMENTS OF THE FACILITY
AND THE PERSON RESPONSIBLE FOR PERFORMING THE MAINTENANCE.
g. OUTFALL FROM A DETENTION FACILITY SHALL BE DISCHARGED TO A RECEIVING CHANNEL, AND ENERGY DISSIPATERS SHALL BE PLACED AT
THE OUTFALL OF ALL DETENTION FACILITIES AS NECESSARY TO PROVIDE A STABILIZED TRANSITION FROM THE FACILITY TO THE RECEIVING
CHANNEL.
h. ALL ON -SITE CHANNELS MUST BE VERIFIED TO BE ADEQUATE.
i. INCREASED VOLUMES OF SHEET FLOWS THAT MAY CAUSE EROSION OR SEDIMENTATION ON ADJACENT PROPERTY SHALL BE DIVERTED TO A
STABLE OUTLET, ADEQUATE CHANNEL, PIPE OR PIPE SYSTEM, OR TO A DETENTION FACILITY.
j. IN APPLYING THESE STORM WATER RUNOFF CRITERIA, INDIVIDUAL LOTS OR PARCELS IN A RESIDENTIAL, COMMERCIAL OR INDUSTRIAL
DEVELOPMENT SHALL NOT BE CONSIDERED TO BE SEPARATE DEVELOPMENT PROJECTS. INSTEAD, THE DEVELOPMENT, AS A WHOLE, SHALL BE
CONSIDERED TO BE A SINGLE DEVELOPMENT PROJECT. HYDROLOGIC PARAMETERS THAT REFLECT THE ULTIMATE DEVELOPMENT CONDITION
SHALL BE USED IN ALL ENGINEERING CALCULATIONS.
k. ALL MEASURES USED TO PROTECT PROPERTIES AND WATERWAYS SHALL BE EMPLOYED IN A MANNER WHICH MINIMIZES IMPACTS ON THE
PHYSICAL, CHEMICAL AND BIOLOGICAL INTEGRITY OF RIVERS, STREAMS AND OTHER WATERS OF THE STATE.
UMANSKY SUBARU
OF CHARLOTTESVILLE
WPO/VSMP AMENDMENT
J U LY 27, 2021
EROSION CONTROL
NARRATIVE
EC101
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S0MH-A4 TOP. 435.43
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S0MH-A3 TOP. 435.22
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OUT: ASSUMED 42"PIPE 399. 60 LA2J
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SDMH-A2 TOP. 425 72
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UMANSKY SUBARU OF #960 CURB INLET �I •4JJ 1 j
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/ 6.02 / 428.40 CHARLOTTESVILLE LsroRr IP 2j 42
TRAFFIC CONTROL °
-----------a -------
-
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----------
,u,� D.B. 1402 P. 744
Z
a
SDMH-EX4 TOP.• 4/4.39
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SEMINOLE TRAIL
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0
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CSW
n
0 10' 20' 40'
waterstreetstudio
landscape architecture I civil engineering
418 E Main Street 434.295.8177 Charlottesville, VA 22902
NOT FOR CONSTRUCTION
professional seal
ALAN FRANKLIN
project manager
project team
UMANSKY SUBARU
OF CHARLOTTESVILLE
project name
UMANSKY AUTO GROUP
client
960 HILTON HEIGHTS ROAD
CHARLOTTESVILLE, VA 22901
project address
project number
WPO/VSMP AMENDMENT
project phase
J U LY 27, 2021
issue date
1, 07,26.21 COUNTY SITE REVIEW COMMENTS
revisions
EROSION &
SEDIMENT CONTROL
PLAN
sheet title
EC102
sheet number
DOUBLETREELANE
FIX w V I vI
OF
3CEL 68D4
HEIGHTS ROAD
'Y. VIRGINIA
CONTOUR INTERVAL: 2'
103-0035-07 I
428.83
JY
TC
80AK�
/ �i T-a1a221
SDMH TOP:435.99
OUT: 12" PIPE 435.85 (WEST)
N32-20'06"E
45.09'
12UAK3U
DOUBLETREE LANE
50' ACCESS EASEMENT
-{N=ILn'7_EASEMENT
D.B. 763 P. 600, 602 PLAT
D.B. 761 P. 298
�T-1977108
A 179/,
:PRE
Qty..
ARE •TOA
Q:
. •
.
•
:.
�:�.
�X:
X 6'
FIiT5 RAS'
`�'•,6' X 6 f'ILTERRA :\ '
T.. D:A_:= :11.,872 SF as .41. '.
(10, F' IMo ERVIOm) .'
:. •' A
—�- --
----- ----'-T'ar _Z- &14EVGR25,
-420
I
R=60.00'
A=80.99'
T=48.02'
C=74.98'
I
CB=NO6020'07"W
I A
DEL TA= 77°2028"
�80..AKf ;
43.42
BMA2g5
8OAr45 `i
, M(J-EXI
50'ACCESSEASEMENT
_A7VDVRLITYLA3EMENT -
SDMH TOP '435. 99
D.B. 763 P. 600, 602 PLAT
OUT: 12"PIPE 435.85(WESTJ
D.B. 76/ P. 298
/ N3220D6'E
45.09'
445.86
® 0\ f/ ® \ 1 ® \ 0\ \ /®120AK3®120, 0
120AK30\ / � 80AK25 �� 120AK30 / J /
POST.DEV�.
ARE
T TWO
EX. 4' X 6' FILTERW, \p p
D.A. = 13,892 SF x� \
\ (9,045 SF IMP �#� ASPHALT 443.41
—- — — — — — — -- �—__-
EX. CJ
�G G v—
O
T
ASPHAL
EX. UP EX. UP
1 J�33Q J� 42347 (P KI G A1T TRE� W (PARKI LOTWRE w W�w w w w w
'aia.aa.'
ti 0 10' 20' 40'. QTREE,O vyq�v��
EX. 4PLE D.B.2721 P. 145PLA 4202c�1 4-Fp
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POST -DEVELOPMENT DRAINAGE AREA MAP
STORMWATER MANAGEMENT NARRATIVE
VSMP CHANNEL PROTECTION CRITERIA & FLOOD PROTECTION NARRATIVE
THIS RE -DEVELOPMENT PROJECT DOES NOT CREATE A MEASURABLE INCREASE IN PEAK STORMWATER VOLUME OR PEAK RATE BECAUSE
THERE WILL ONLY BE AN INCREASE OF 127 SF OF IMPERVIOUS AREA ON THE SITE ASSOCIATED WITH THE PROPOSE SITE PLAN AMENDMENT.
THE STORMWATER OUTFALL FOR THE SITE IS AND WILL CONTINUE TO BE AN EXISTING 48" RCP THAT TRAVERSES THE SOUTHERN END OF THE
SITE AND THEN TURNS NORTH AND PARALLELS THE U.S. 29 NORTH TO DISCHARGE TO THE RIVANNA RIVER. THE ORIGINAL (BROWN'S
AUTOPARK) SITE PLAN APPROVAL INCLUDED A CAPACITY ANALYSIS OF THIS EXISTING PIPE SYSTEM THAT PROVED THAT IT WAS ADEQUATE TO
HANDLE THE SITE'S FULL BUILD -OUT RUNOFF WITHOUT ON -SITE STORMWATER QUANTITY MANAGEMENT (DETENTION).
WATER QUALITY CONTROL
(SEE ATTACHED SPREADSHEET)
THE PREVIOUSLY APPROVED SITE PLAN (BROWN AUTOPARK) UTILIZED FILTERRA BIOFILTRATION UNITS TO ADDRESS
STORMWATER QUALITY. THE PROPOSED BUILDING EXPANSION REQUIRES REMOVAL OF TWO (2) 4' X 6' FILTER UNITS AND
SLIGHTLY REDUCES THE CONTRIBUTING DRAINAGE AREA TO A 6' X 6' FILTERRA UNIT. TO OFFSET THE LOSS OF STORMWATER
QUALITY TREATMENT FROM THE FILTERRAS TO BE REMOVED, NUTRIENT CREDITS WILL BE PURCHASED FROM AN APPROVED
NUTRIENT BANK. TO CALCULATE THE TOTAL LOAD (LP) REQUIRED, THE COMBINED WATERSHED AREA TO THE TWO FILTERRA
UNITS WAS ENTERED INTO THE PRE -DEVELOPMENT LAND COVER TABLE OF THE VRRM SPREADSHEET AT MANAGED TURF AND
THEN SUBSEQUENTLY THE PROPOSED LAND COVER WAS ENTERED INTO THE POST -DEVELOPMENT LAND COVER TABLE.
CALCULATED TP LOAD REDUCTION REQUIRED = 0.37 LBS/YR
(CRITERIA MET UPON PROOF OF PURCHASE)
OVV
Bw
430.57
430.1
Bw
430.21
BW
430.2
�GA7
vnc
1
/ 429.38
G-
ILT
420.
0 10' 20' 40'
waterstreetstudio
landscape architecture I civil engineering
418 E Main Street 434.295.8177 Charlottesville, VA 22902
I
NOT FOR CONSTRUCTION
professional seal
ALAN FRANKLIN
project manager
project team
UMANSKY SUBARU
OF CHARLOTTESVILLE
project name
UMANSKY AUTO GROUP
client
960 HILTON HEIGHTS ROAD
CHARLOTTESVILLE, VA 22901
project address
project number
MAJOR SITE PLAN AMENDMENT
project phase
MAY 10, 2021
issue date
1, 07,26.21 COUNTY SITE REVIEW COMMENTS
revisions
STORMWATER
MANAGEMENT PLAN
sheet title
SW100
sheet number
ECOSYSTEM SERVICES, LLC
1739 Allied Street, Suite A
Charlottesville, VA 22903
540.578.4296
www.ecoUstemservices.us
iona,ecMstemservices.us
July 29, 2021
Alan Franklin, PE
waterstreet studio
418 East Main Street
Charlottesville, VA 22902
RE: Nutrient Offset Credit - Credit Availability Letter
Umansky Subaru of Charlottesville - WPO/VSMP Amendment Project
960 Hilton Heights Road, Charlottesville, VA 22901
Project Tax Map Parcel ID: 45-68D4 - Parcel E
Project HUC: 020802040203
Bank HUC: 020802040202
Bank Address: 1705 Lambs Road, Charlottesville, VA 22901
Dear Mr. Franklin,
We appreciate the opportunity to provide a credit availability letter for 0.37 pounds of phosphorus for
the above referenced project. This letter is to certify that as of today, July 29, 2021, Ivy Creek Nutrient
Bank has 129.43 pounds of phosphorus (TP), 199.28 pounds of nitrogen (TN), and 40,814.06 pounds of
TSS available for transfer to those entities requiring offsets in accordance with the Chesapeake Bay
Watershed Nutrient Credit Exchange Program (VA Code § 62.1-44.19:14 et Seel.). Those offsets are also
transferable in accordance with the Virginia stormwater offset program (VA Code § 62.1-44.15:35) and
the Virginia Soil and Water Conservation Board's Guidance Document on Stormwater Nonpoint Nutrient
Offsets approved pn July 23, 2009, to those regulated entities qualifying for nutrient credits.
n 1.
We can certainly accommodate your needs and could offer to fulfil the order of 0.37 pounds of ,
�I
phosphorus.
Please feel free t4 contact us with any questions. I hope we have the opportunity to worktogether on this ¢ e
project. Uo
Sincerely, '1 uou ° 9q pil of ii
V
Ecosystem Services, LLC
-.
P b
fI�_Itl
I,". rt i - �
Jill Jd m°
6 V� 11 �'pp ( 7.rd� ( i�!_i 0)i tl�ll7 l� n�! �l. °'I (✓il-d "l� I Ill yr� �' i�l ��. ��I iI
0 ul
r
tF.4.njRf�'ol� rA��iS&PAl��q.j��d��Ii.�
Project Name: Umansky Subaru Site Plan Amendment
Date: 5/26/2021
Linear Development Project? No
Site Information
Post -Development Project (Treatment Volume and Loads)
Enter Total Disturbed Area (acres) as/
reduction required:
The site's net increase in impervious cover (acres) is:
ost -DevelopmentMaximum
Pre-ReDevelopment Land Cover (acres)
A Soils
BSoils
CSoils
DSoils
Totals
Forest/Open Spare (acres) -- undisturbed
0.00
forest/a ens ace
Managed Turf (acres) -- disturbed, graded
0.32
for yards or other turf to he
0.32
Impervious Cover (aces)
0.00
0.00
0.32
Post -Development Land Cover (acres)
A Soils
BSoils
CSoils
Dsoils
Totals
Forest/Open Space (acres) - undisturbed,
0.00
protected forest/open sace orrefomsted
Managed Turf (acres) -- disturbed, graded
for arils arotherturf to be
0.11
0.11
Impervious Cover (aces)
0.21
0.21
Area Check
OK.
OR.
OK.
OK.
0,32
IConstants
Annual Rainfall (inches)
43
Target Rainfall Event(inches)
1.00
Total Phosphorus (TP) EMC (mg/L)
0.26
Total Nitrogen (TN) EMC(mi
1.86
Target TP Load (lb/acre/yr)
0.41
Pi(unitless correction factor)
0.90
Runoff Coefficients IRA
data input cells
constant values
calculation cells
Check:
BMP Design Specifications List: 2011 Stds & Specs
Linear project? No
Land cover areas entered correctly?
Total disturbed area entered? Total disturbed area > Post -Development areall
A Soils
B SoilsCSoils
D Soils
Forest/Open Space
0.02
0.03
0.04
0.05
Managed Turf
1 0.15
0.20
0.22
0.25
Impervi ous Cover
1 0.95
0.95
0.95
0.95
LAND COVER SUMMARY -- PRE -REDEVELOPMENT
Land Cover Summary -Pre
Pre-ReDevelopment
Listed
Adjusted'
Forest/Open Space Cover (acres)
0.00
0.00
Weighted Rv(fomst)
0.00
0.00
%Forest
0%
0%
Managed Turf Cover (acres)
0.32
0.11
Weighted Rv(turf)
0.20
0.20
%Managed Turf
100%
100%
Impervious Cover (acres)
0.00
0.00
Rv(imperAous)
0.95
0.95
%Impervious
0%
0%
Total Site Area (acres)
0.32
0.11
Site Rv
0.20
0.20
Treatment Volume and Nutrient Load
Pre-ReDevel opment Treatment Volume
(acre-ft)
0.0053
0.0018
Pre-ReDevel opment Treatment Volume
(cubic feet)
232
80
Pre-ReDevelopment TP Load
(lb/yr)
0.15
0.05
Pre-ReDevelopment TP toad per acre
(I b/acre/yr)
0.46
0.46
Baseline TP Load (lb/yr)
(0.4116s/acre/yr applied to pre -redevelopment area excludi ng
pervious land proposed for newimpervlous cover)
0.05
'Adjusted Land Cover Summary:
Pre ReDevelopment land cover minus pervious land cover (forest/open space or
managed turf) acreage proposedfor new impervious cover.
Adjusted total acreage's consistent with Post-ReDevelopment acreage (minus
acreage of new impervious cover).
Column Ishows bad reduction requriement far new impervious cover (based on
new development load limit 0.41 Ibs/acre/year).
Land Cover Summary -Post (Final)
Land Cover Summary -Post
Post-ReDevelopment
Forest/Open Space 000
Larid Cover Summary -Post
Post -Development New Impervious
Post ReDev. &New Impervious
Forest/Open Space
0.00
Cover(acres)
Cover (acres)
Weighted Rv(forest)
%Forest
Managed Turf Cover
0.00
0%
0.11
Weighted Rv(forest)
0.00
%Forest
0%
Managed Turf Cover
0.11
(acres)
(acres)
Weighted Rv (turf)
%Managed Turf
ReDev. Impervious
0.20
100%
New Impervious Cover
Weighted Rv (turf)
0.21)
%Managed Turf
34%
Impervi ous Cover
(acres)
0.21
Cover (acres)
Rv(lmpervious)
%Impervious
Total ReDev. Ate Area
0.00(acres)
0.95
0%
Rv(i mpervious)
0.21
0.95
Rv(Imperdous)
0.95
%Impervious
66%
Final Site Area (acres)
0.32
(aces)
ReDevSRe Rv
0.11
0.20
Final Post Dev Site Rv
0.69
Treatment Volume and
Past-ReDevelopment
Nutrient Load
Final Post-
Post -Development
Development
0.0185
TreatmentVolume
0.0018
TreatmentVolume
0.0166
Treatment Volume
(acre -it)
(acre-ft)
(acre-ft)
Post-ReDevelopment
Post -Development
Final Post -
Development
804
Treatment Volume
80
Treatment Volume
724
Treatment Volume
(cubic feet)
(cubic feet)
(orbit feet)
Final Post -
Development TP
Post-ReDevelopment
Post -Development TP
0.51
Load (TP)
0.05
0.46
Load
hb/yr)•
Load (lb/yr)
(lb/yr)
Post-ReDevdopment TP
Final Post-Denlapment
TP load per acre
1.58
Load per acre
0.46
itulaae/yr)
(lb/acre/yr)
Naan. Redua ion Required
(Below Pre-
10%
TP Load Reduction Required (lb/yr) 1 0.37
Nitrogen Loads (Informational Purposes Only)
wDevelopment Load)
TP Load Reduction TP Load Reduction
Required for 0.01 Required for New 0.37
Redeveloped Area Impervious Area
(lb/yr) (lb/yr)
Pre -Re Development TN Load Final Post -Development TN Load
(lb/yr) 1.04 (Post-ReDevelopment&New 3.61
Impervious) (lb/yr)
waterstreetstudio
landscape architecture I civil engineering
418 E Main Street 434.295.8177 Charlottesville, VA 22902
i
ll
i\
NOT FOR CONSTRUCTION
professional seal
ALAN FRANKLIN
project manager
project team
UMANSKY SUBARU
OF CHARLOTTESVILLE
project name
UMANSKY AUTO GROUP
client
960 HILTON HEIGHTS ROAD
CHARLOTTESVILLE, VA 22901
project address
project number
WPO/VSMP AMENDMENT
project phase
J U LY 27, 2021
issue date
revisions
STORMWATER
MANAGEMENT
CALCULATIONS
sheet title
SW101
sheet number