HomeMy WebLinkAboutWPO202100060 Correspondence 2022-01-21BOHLERI
County of Albemarle
Community Development Department
401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
Attn: David James
Dear Mr. James:
9100 Arboretum Parkway, Suite 360
Richmond, VA 23236
o. 804.893.8200
January 21, 2022
Via Electronic Upload
Re: WPO202100060
Discount Tire — VSMP Plan 1S1
Review Response
1636 Seminole Trail
Charlottesville, VA 22901
Albemarle County
BE # V211201
Bohler Engineering is pleased to submit on behalf of Halle Properties, LLC the revised VSMP
Plan 2nd Submission for the Discount Tire in Albemarle County, Virginia. The following is our
comment response letter addressing comments received from Albemarle County Community
Development Department dated December 3, 2021. Each comment is addressed and
responded to as follows:
Albemarle County Community Development Department — David James
A. Stormwater Pollution Prevention Plan (SWPPP)
Comment 1: Section 8 - Complete.
Response 1: Acknowledged; to be provided with signature submission.
Comment 2: Section 9 — Sign & date.
Response 2: Acknowledged; to be provided with signature submission.
Comment 3: Section 10 —Complete.
Response 3: Acknowledged; to be provided with signature submission.
B. Pollution Prevention Plan (PPP)
Comment 1: Provide concrete washout detail.
Response 1: Concrete washout detail added to Erosions and Sediment Control Details
Sheet. Page 17 in SWPPP and Sheet C-604 in VSMP.
w . BohlerEngineering.com
BOHLER
David James
VSMP V Review Response
January 21, 2022
Page 2 of 4
Comment 2: Show stockpile area, clearing/grading/demo activities, locations where
concentrated stormwater discharges.
Response 2: Stockpile area, clearing and demo activities shown on Erosions and
Sediment Control Plan Phase I Sheet. Page 14 in SWPPP and Sheet C-601
in VSMP. Stockpile area, grading and concentrated stormwater discharge
activities shown on Erosions and Sediment Control Plan Phase 11 Sheet.
Page 15 in SWPPP, Sheet C-602 in VSMP.
C. Stormwater Management Plan (SWMP)
Comment 1: [C-901] the pre -/post- development drainage areas should include the off -site
areas for the purposes of SWM analysis.
Response 1: The pre and post drainage maps have been updated to indicate areas
detained in the underground system and off -site area being routed to the
system. See Sheet C-901 for updated drainage maps and Sheet C-903 for
associated HydroCAD routing diagram.
Comment 2: [C-901] Use the 1-year design storm values in your Energy Balance to determine if
you meet compliance. 2-yr was used/shown.
Response 2: The Energy Balance calculations have been updated to show the 1-year
design storm, see Sheet C-901.
Comment 3: [C903] Revise Hydrographs: NOAA Atlas 14 lists the 24-hr i(in) as these for the
design storms:
IF24-hr 3.01 3.65 4.66 5.51
(2.71-3.38) (3.28-4.10) (4.17-5.23) (4.92-6.16)
Response 3: Hydrographs have been updated per the NOAA Atlas 14 values, see Sheets
C-903 — C-906 for revised hydrographs.
Comment 4: Show the HydroCAD routing diagram.
Response 4: The HydroCAD routing diagram is now provided on Sheet C-903.
Comment 5: Show SWM Facility Easement over SWM vault system. See detail from ACDSM,
pg. 15 for width requirement.
Response 5: Easement for SWM Facility is shown on Sheet C-602. Two easement labels
(20' & 48') have been placed to identify its variable width.
Comment 6: Provide cross-section & profile views of the SWM vault. Details should include all
dimension and materials used for installation. Include installation specifications
from manufacturer.
a. Water -tight joints are required for all CMP joints and connections.
b. CMP must meet or exceed the minimum required design thickness.
Response 6: Manufacturer's underground system notes and details have been added,
see Sheet C-907.
w . BohlerEngineering.com
David James
BOHLER VSMP 15' Review Response
January 21, 2022
Page 3 of 4
Comment 7: Provide required maintenance, including maintenance schedule & timing, refuse
disposal, access requirements for the SWM vault.
Response 7: Manufacturer's underground system notes and details have been added,
see Sheet C-907.
Comment 8: Include our VSMP CRD & As -built checklist on the plans.
Response 8: Albemarle County Construction Record Drawings & AsBuilt checklist added
to Sheet C-905.
Comment 9: Provide Letter of Availability from nutrient credit provider on the plans.
Response 9: Nutrient Credit Availability Letter from Eco-Cap added to Sheet C-905.
Comment 10: Record the SWM Maintenance agreement.
Response 10:Acknowledged; SWM Maintenance agreement to be approved and recorded
prior to plan approval.
Comment 11: Note: SWM easement plat & deed will need to be recorded.
Response 11:Acknowledged; SWM easement plan and deed to be recorded prior to plan
approval.
Comment 12: Note: Purchase of credits needed prior to permit issuance.
Response 12:Acknowledged; nutrient credit proof of purchase to be provided prior to
plan approval.
D. Erosion and Sediment Control Plan (ESCP)
Comment 1: [Cover] Add WPO202100060 under title.
Response 1: WPO202100060 added to Sheet C-101 under title.
Comment 2: Show an existing conditions & demo operations sheet.
Response 2: Existing conditions and demolition plan added to plan set as Sheet C-201
Comment 3: [C-601/C-602] reduce the linetype boldness (width) of drainage divides/areas for
clarity or grey them out.
Response 3: Drainage divide linetype thickness has been reduced by 50% to assist with
clarity, see Sheets C-601 & 602.
Comment 4: [C-601 ] Show a 70' long pave construction entrance.
a. Provide Paved Wash Rack detail (ACDSM, p. 8)
Response 4: Construction entrance revised to 70' long on Sheets C-601 & 602.
Albemarle County Paved Washrack Detail provided on Sheet C-604.
Comment 8: Note: VDOT entrance permit required prior to grading permit issuance.
Response 8: Acknowledged; VDOT entrance permit to be acquired prior to grading
permit issuance.
w . BohlerEngineering.com
BOHLERI
David James
VSMP 1s' Review Response
January 21, 2022
Page 4 of 4
Should you have any questions regarding this project or require additional information, please
do not hesitate to contact me at (804) 893-8200.
Sincerely,
Bohler Engineering
Ryan Yauger, P.E.
RY/je
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