HomeMy WebLinkAboutWPO201700036 Review Comments WPO VSMP 2017-08-08Short Review Comments Report for:
WPO201700036
SubApplication Type:
New Ivy Solid Waste Transfer Station
Stormwater Management/BMP Plan
Erosion and Sediment Control Plan
Date Completed:05/27/2017
Reviewer:David James CDD Engineering
Review Status:Requested Changes
Reviews Comments:
Division:
Date Completed:05/22/2017
Reviewer:Geoff Elsie CDD Engineering
Review Status:Requested Changes
Reviews Comments:
Division:
Date Completed:07/11/2017
Reviewer:Ana Kilmer CDD
Review Status:Approved
Reviews Comments:SWA recorded at the clerks office in deed book 4932, page 468
Division:
Date Completed:08/08/2017
Reviewer:David James CDD Engineering
Review Status:Approved
Reviews Comments:E&SC/SWM bond will not be required; Pre-con fee waived; Stormwater easement plat to be
submitted/recorded.
Division:
Date Completed:08/08/2017
Reviewer:Geoff Elsie CDD Engineering
Review Status:Approved
Reviews Comments:
Division:
Page:1 of 1 County of Albemarle Printed On:September 27, 2017
Environmental Consultants 2877 Guardian Lane 757 466-3361
Suite 1-F FAX 757 257-6349
Virginia Beach. VA 23452 www.scsengineers.com
SCS ENGINEERS
July 14, 2017
File No. 02216108.01
Mr. David James and Mr. Geoff Elsie
Department of Community Development
401 McIntire Road
Charlottesville, VA 22902
Subject: VSMP Permit Plan Review- WPO 201700036 New Ivy Solid Waste Transfer
Station
Dear Mr. David James and Geoff Elsie:
On behalf of the Rivanna Solid Waste Authority, SCS Engineers (SCS) is resubmitting
permitting documents for WP0201700036 New Ivy Solid Waste Transfer Station. The submittal
includes the following documents (two copies of each):
• Stormwater Pollution Prevention Plan (SWPPP)
• Stormwater Report
• Drawing set that includes both the Stormwater Management Plan (SWMP)and Erosion
and Sediment Control Plan (ESCP)
Responses to the VSMP Permit Plan Review comments made by County reviewers are provided
below. The original comments are indented, italicized and numbered with SCS responses
provided under the heading "Response".
A. Stormwater Pollution Prevention Plan (SWPPP)
I 1. Registration statement—Correct the Longitude to be a negative number(-78.654).
Response: Longitude has been changed and is included in the SWPPP.
2. Provide a copy of General Permit when obtained and insert the permit into the
SWPPP at the jobsite.
Response: A copy of the General Permit will be inserted into the SWPPP at the jobsite.
C. Stormwater Management Plan (SWMP)
1. Change the Submittal title to VSMP Plan and Include WPO201700036 number on the
cover sheet.
Office
Mr. David James and Geoff Elsie
July 14, 2017
Page 2
Response: The cover sheet has been changed to include the WPO201700036 and the Title
VSMP.
1 / 2. Remove "Approval"signature block from cover sheet. Engineering is the only
��// department that reviews/approves the VSMP plans.
Response: The approval signature block has been removed from the cover sheet.
./ 3. Remove Sheets 4, 8-10 and 21-22 from the VSMP plan
Response: Sheets related to the County's Final Site Plan permit have been removed from the
VSMP drawing set as requested.
j4. Include note: Safety slabs (SL-1)shall be provided in any structure taller than 12'
(i.e., STR Al &A2)
Response: A note regarding safety slabs has been added to Drawing SW2.
/ 5. Include note: Concrete inlet shaping(IS-1) shall be specified on any structure with a
4'or greater drop.
Response: Notes regarding inlet shaping have been added to Drawings SW2 and SW3.
6. Sheets SW1/SW3-Pipes P8& P10 from Drainage Summary Table do no match the
values (lengths& slopes)shown in profile (please correct/revise).
Response: The Drainage Summary Table has been updated so that the values correspond to the
profiles.
7. Sheet SW3—Pipe slopes are missing on a few profiles (detail 10 and 7)
Response: Pipe slope information has been added to Details 7 and 10 on Drawing SW3.
8. Sheet SW2—I count five (5) `new'channels,four(4) are shown. Two are labeled
"A21". Provide correct callout and details. Show the drainage channel details for
roadside ditch leading to Str A17. Show Channel profiles/cross sections and revise
the drainage calc.packet.
Response: As discussed in our phone conversation on June 1, 2017, Channel A18 includes the
concrete channel on the south side of the proposed entrance road and the Flexamat lined channel
that runs along the existing facility entrance road. Additionally, all channels and storm drains are
correctly labeled.
9. Sheet SW2—Impervious cover calculates to be 29%oftotal drainage not 25%
area,
Response: The total impervious cover calculations have been updated to show the 29%.
0
Office
Mr. David James and Geoff Elsie
July 14, 2017
Page 3
V 10. How is stormwater being directed to the points shown at sand filters C&D.
Response: As discussed in our phone conversation on June 1, 2017, sand filters C & D have an
underdrain that will collect storms less than the 10-year event and discharge them downstream
into drop inlets. The drop inlets are raised 6 inches and are used to capture the 10-year
stormwater event and discharge the stormwater downstream.
11. Provide the plan name & number for the Joyce Engineering plan dated 1998. Show
the drainage area for the existing basin. It is not shown on drawing G2.
Response: The Joyce Engineering drawings referenced in Appendix K were provided to the
County in an email dated June 2, 2017. Per email from David James dated June 22, 2017, this
comment(#11)was considered addressed after the County's review of the Joyce Engineering
drawings. The drainage area for the existing basin is shown on SW6.
f12. Provide Documentation and certification that the "zero discharge pond"does not
discharge to confirm adequate channel requirements have been met. Show that
channel/flood protection requirements are met under Part IIB (9VAC25-870-66).
Response: The Joyce Engineering drawings referenced in Appendix K were provided to the
County in an email dated June 2, 2017. Per email from David James dated June 22, 2017, this
comment(#12)was considered addressed after the County's review of the Joyce Engineering
drawings.
113. Appendix K: Show/include that the basin will not discharge during 1-year 24-hour
storm.
Response: The Joyce Engineering drawings referenced in Appendix K were provided to the
County in an email dated June 2, 2017. Per email from David James dated June 22, 2017, this
comment(#13)was considered addressed after the County's review of the Joyce Engineering
drawings. However, SCS did include the one-year storm event in Appendix K to show the 1-year
24-hour event does not discharge from the pond.
14. VRRMspreadsheet indicates there is a manufactured treatment device. Please
identify where this device is located and what it is specifically. Is there a detail for
this divide?
Response: There are no manufactured treatment devices at the facility. In order to properly
model the sand filters in series on one spreadsheet,the information for the upstream sand filters,
including the phosphorus removal efficiency, was input into the spreadsheet row for the
manufactured treatment device.
15. Provide Note that all sand filters will have underdrain.
CP
Office
Mr. David James and Geoff Elsie
July 14, 2017
Page 4
Response: Notes have been added regarding the underdrains for all sand filters have been added
to SW5.
Y6. Provide maintenance requirements for all stormwaterfacilities on the plans.
P
Response: The maintenance requirements from Section 9 of the Virginia DEQ Stormwater
Design Specification No. 12 have been added to the General Notes on ES 1.
17. Contact Ana Kilmer for SWM agreement.
`—N Response: The stormwater agreement has been established and now needs to be executed by the
Rivanna Solid Waste Authority with notarized signature and recordation fee.
\ 18. An ESC/SWM bond will be required.
•Response: Ana Kilmer was contacted and explained that Rivanna Solid Waste Authority will
need to submit a request to establish the bond after approval of the permit. Once submitted,the
County will then calculate bond and once a contractor has been selected, it is the contractor's
duty to finalize securing the bond.
D. Erosion and Sediment Control Plan (ESCP)
1. Provide Deed Book and Page Number for all existing easements.
Response: Deed Book and Page Number have been added to Drawing G2 Property Information-
1
2. Provide wash water Trapping Basin at construction entrance road–sheet ES-2
Response: A wash water trapping basin has been provided on Drawing ES2.
3. Provide Stormwater Conveyance Channel identified on the western side of the site
near Zero Discharge Basin (Sheet ES-2).
Response: A note regarding the dimensions of the stormwater conveyance channel to match the
dimensions of the final channel size have been added to ESI. Additional check dams have been ✓
added to the stormwater conveyance channel on the west portion of the site.
4. Silt Fence notation identified along contour line 740, remove or place closer to
proposed Silt Fence (Sheet ES-2).
Response: Silt fence notation along the 740 contour line has been moved closer to the proposed
silt fence.
S. Provide Detail for Stormwater Conveyance Channels;provide details of design per
Standards and Specifications 3.17 found in Virginia Erosion and Sediment Control
Handbook.
0
Office
Mr. David James and Geoff Elsie
July 14, 2017
Page 5
Response: Details regarding typical stormwater channels are provided on sheet S.W4 along with/'1
a note provided on ESI regarding conformance to the Virginia Erosion and Sediment Control
Handbook.
6. Provide Rip/Rap outlet detail at the Zero Discharge Basin. Show Stone Sizing(Sheet
ES-3).
Response: A detail reflecting the outlet protection calculated in the stormwater report has been
added to Drawing ES4.
7. Provide Basin/Trap Details, specs and calculations (Sheet ES-3).
Response: The existing zero discharge pond will be used as a temporary sediment basin. A /
calculation of its adequacy for wet and dry storage is provided on Drawing ES 1,. The Joyce
Engineering drawings illustrating the basin's details and dimensions were provided to the County
in an email dated June 2, 2017. Additional calculations related to the basin are provided in
Appendix K of the Stormwater Report.
8. Stormwater Conveyance Channels need to be shown and noted(Sheet ES-3).
Response: Stormwater conveyance channels are now shown on Drawing ES3.
9. Stockpile area needs Temporary Seed Notation (Sheet ES-3).
Response: The stockpile area has been added to sheet ES2 and temporary seeding notation j
added to both sheets.
10. Show Material Laydown Area with any additional controls on Sheets ES-2 and ES-3. ,
Response: The material laydown area has been added to ES3. Fuel areas and temporary sanitary ✓
features have been added to sheet ES2 and ES3 with their appropriate protection.
11. Trench Drains are shown on Sheet ES-3. Remove from Erosion and Sediment Control
Plan if they are to be installed during Stormwater phase. If installed during Phase 2
of the Erosion and Sediment Control plan,provide details and ESC protection.
Response: Trench drains have been removed from Drawing ES3. Details and protection for
outlets are provided on sheet SW5.
12. Provide Outlet Protection for discharges from proposed Sand Filter Location D to
Proposed EW-1 /
Response: Outlet protection has been added to the end wall from sand filter D. ✓
13. Provide Outlet Protection for Discharges from proposed Sand Filter location B to
proposed EW-1.
Office
Mr. David James and Geoff Elsie
July 1 4, 2017
Page 6
Response: Outlet protection has been added to the end wall from sand filter B. xr
14. Provide Outlet Protection for Discharges from Proposed forebay into proposed Sand
filter A. Discharge is from the 24"RCP.
Response: Outlet protection has been added to the endwall from the forebay of sand filter A ./
15. ES2-In regards to Note #9,provide newer topo. Use Latest county topo from GIS.
Response: Based on County comments made during the Initial Site Plan permit review process,
the topography was check by a surveyor. Per emails with County staff(Ms. Paty Saternye and
Ms. Emily Cox) dated December 22, 2016, it was understood that the verification was sufficient.
Email excerpt is noted below:
[Question] In reference to verifying the topography, since the site is wooded, would you
accept some spot checks of the elevation by a surveyor?If so,what differential would
you accept?How close would the spot checked elevation have to be to the flown
topography for you to accept that the flown topography was correct/sufficient?
[Response] A simple note saying it was field verified with the date would be fine. It is
really their risk if they don't have it surveyed and the topo is not correct(since they are
referencing survey from '97 and '99).
A note regarding the surveyor's check of the 1997 and 1999 topography was added to Drawing ✓
ES2.
If further information is required, feel free to contact either of the undersigned at 757-466-3361.
Sincerely,
,fik
rp- -
David C. Cobb, EIT Anthony . Tomlin, PE
Staff Professional Project Manager
SCS ENGINEERS SCS ENGINEERS
cc: Michelle Simpson/RSWA, Phil McKalips/RSWA
Enclosures
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road,Room 227
Charlottesville,Virginia 22902-4596
Phone(434)296-5832 Fax(434)972-4126
VSMP Permit plan review
Project title: New Ivy Solid Waste Transfer Station
Project file number: WPO201700036
Plan preparer: SCS Engineers—Tony Tomlin. [ttomlin@scsengineers.com]
Owner or rep.: Rivanna Solid Waste Authority-Philip McKalips
[pmckalips@rivanna.org]
Plan received date: 17 April 2017
Date of comments: 27 May 2017
Reviewers: Geoff Elsie—VESCP
David James—VSMP
County Code section 17-410 and Virginia Code §62.1-44.15:34 requires the VSMP authority to
act on any VSMP permit by issuing a project approval or denial. This project is denied. The
rationale is given in the comments below. The application may be resubmitted for approval if all of
the items below are satisfactorily addressed. The VSMP application content requirements can be
found in County Code section 17-401.
A. Stormwater Pollution Prevention Plan (SWPPP)
The SWPPP content requirements can be found in County Code section 17-405. A SWPPP must
contain(1)a PPP, (2)an ESCP, (3)a SWMP, and(4)any TMDL measures necessary.
1. Registration Statement—Correct the Longitude to be a negative number(-78.654).
2. Provide copy of General Permit when obtained and insert the permit into the SWPPP at the jobsite.
B.Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. Adequately addressed.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is disapproved, and the reasons are provided in the comments below. The
stormwater management plan content requirements can be found in County Code section 17-403.
1. Change the submittal title to VSMP Plan and include WP0201700036 number on the cover sheet.
Remove"approval" signature block from cover sheet. Engineering is the only department that
reviews/approves the VSMP plans.
3. Remove sheets 4, 8-10, and 21-22 from the VSMP plan.
4. Include note: Safety slabs(SL-1) shall be provided in any structure taller than 12' (i.e. STR Al &
A2).
5. Include note: Concrete inlet shaping(IS-1)shall be specified on any structure with a 4' or greater
drop.
Engineering Review Comments
Page 2 of 3 _
6. Sheet SW1/SW3 -Pipes P8 &P10 from Drainage Summary Table do not match the values
(lengths& slopes)shown in profile(please correct/revise).
7. Sheet SW3-Pipe slopes are missing on a few profiles(detail 10 and 7). t.,.... hq-k--lam 4e/
Sheet SW2-I count five(5) 'new' channels, four(4)are shown. Two are labeled`A.21". Provide
correct callout and details. Show the drainage channel details for roadside ditch leading to Str A17.
Show channel profiles/cross-sections and revise the drainage calc.packet.
9. Sheet SW2-Impervious cover calculates to be 29%of total drainage area,not 25%. )v5k
10. How is stormwater being directed to the points shown at sand filters C &D? 'ate 'c IiQ%KI iwb
j
11. Provide the plan name&number for the Joyce Engineering plan dated 1998. Show the drainage 01(4.'4
area for the existing basin. It is not shown on drawing G2.
12. Provide documentation and certification that the"zero discharge pond"does not discharge to
confirm adequate channel requirements have been met. Show that channel/flood protection
requirements are met under Part IIB (9VAC25-870-66). S%o,,✓ „,,dream 0tierr/04/ will be de/c,ked
13. Appendix K: Show/include that the basin will not discharge during 1-yr 24-hr storm. de..,..,stc4t,y
14. VRRM spreadsheet indicates there is a manufactured treatment device. Please identify where this
device is located and what it is specifically. Is there a detail for this divide?
15. Provide note that all sand filters will have underdrains.
16. Provide maintenance requirements for all stormwater facilities on the plans.
17. Contact Ana Kilmer for SWM agreement.
18. A ESC/SWM bond will be required.
D. Erosion and Sediment Control Plan (ESCP)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP.
This plan is disapproved, and the reasons are provided in the comments below. The erosion control
plan content requirements can be found in County Code section 17-402.
Provide Deed Book and Page Number for all existing easements.
'2, Provide washwater Trapping Basin at Construction Entrance-Sheet ES-2.
Provide Stormwater Conveyance Channel identified on the western side of site near Zero
Discharge Basin(Sheet ES-2). LA)ker Gk's Sown , /it'd,,,de 441,4(4) CO dal cane' 1-0 tD
4. Silt Fence notation identified along contour line 740,remove or place closer to proposed Silt s-P /x
Fence(Sheet ES-2).
5. Provide detail for Stormwater Conveyance Channels,provide details of design per Standards and /.
'ck
Specifications 3.17 found in Virginia Erosion and Sediment Control Handbook. Pro. `/� ""u/1, "' 'n
f 6. Provide Rip/Rap outlet detail at the Zero Discharge Basin. Show stone sizing(Sheet ES-3). ,,,,,,iii.„...7. Provide Basin/Trap details, specs and calculations(Sheet ES-3).
Or .jS C detc�H
\ Stormwater Conveyance Channels need to be shown and noted(Sheet ES-3).
Stockpile area needs Temporary Seed notation(Sheet ES-3).
Show Material Laydown Area with any additional controls on Sheets ES-2 and ES-3. f r I;.-SC l°44 (W.,
11. Trench Drains are shown on Sheet ES-3. Remove from Erosion and Sediment Control Plan if they 844-11i
are to be installed during Stormwater phase. If installed during Phase 2 of the Erosion and Cons}r,
Sediment Control Plan,provide details and ESC protection. lay )
12. Provide Outlet Protection for discharges from proposed Sand Filter location D to proposed EW-1. gm
13. Provide Outlet Protection for discharges from proposed Sand Filter location B to proposed EW-1.
14. Provide Outlet Protection for discharges from proposed forebay into proposed Sand Filter A.
Discharge is from the 24"RCP.
0 ES2-In regards to Note#9,Provide newer topo. Use latest county topo from GIS. SGS = /
The VSMP permit application and all plans may be resubmitted for approval when all comments have rt' u(':
been satisfactorily addressed. For re-submittals please provide 2 copies of the complete permit package
I
Engineering Review Comments
Page 3 of 3
with a completed application form.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a meeting to
discuss this review.
Process;
After approval,plans will need to be bonded. The bonding process is begun by submitting a bond estimate
request form and fee to the Department of Community Development. One of the plan reviewers will
prepare estimates and check parcel and easement information based on the approved plans. The County's
Management Analyst will prepare bond agreement forms,which will need to be completed by the owner
and submitted along with cash, certificates or sureties for the amounts specified. The agreements will need
to be approved and signed by the County Attorney and County Engineer. This may take 2-4 weeks to
obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and recorded.
The County's Management Analyst or other staff will prepare the forms and check for ownership and
signature information. The completed forms will need to be submitted along with court recording fees.
After bonding and agreements are complete, county staff will need to enter project information in a DEQ
database for state application processing. DEQ will review the application information based on local
VSMP authority approval. At this time,the DEQ portion of the application fees will need to be paid
directly to the state. For fastest processing,this is done electronically with the emails provided on the
application. DEQ should notify applicants with instructions on how to pay fees. When DEQ approves the
application,they will issue a permit coverage letter. This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre-construction conference.
Applicants will need to complete the request for a pre-construction conference form, and pay the remainder
of the application fee. The form identifies the contractor and responsible land disturber, and the fee
remaining to be paid. This will be checked by county staff, and upon approval, a pre-construction
conference will be scheduled with the County inspector. At the pre-construction conference,should
everything proceed satisfactorily, a joint VSMP and grading permit will be issued by the County so that
work may begin.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforms.asp?department=cdengwpo