HomeMy WebLinkAboutWPO201900034 Correspondence 2019-07-22s 0 e ! # 41
TIMMONS GROUP
YOUR VISION ACHIEVED THROUGH OURS.
July 19, 2019
Matt Wentland
County of Albemarle
401 McIntire Rd, Rm 227
Charlottesville, VA 22902
608 Preston Avenue P 434.295.5624
Suite 200 F 434.295.8317
Charlottesville, VA 22903 www.timmons.com
RE: UVA Encompass Health Rehabilitation Hospital — VSMP Plan Review — WP0201900034 -
Comment Response Letter
Dear Mr. Wentland:
We have reviewed all of your comments from June 25, 2019 and made the necessary revisions.
Please find our responses to the comments below in bold lettering.
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. Provide a completed Registration Form. Section IA and Section VI will need to be filled
out.
The Registration Form shall be completed and signed prior to VSMP approval.
2. Complete the Signed Certification (section 9 of the SWPPP).
A signed certification to be provided prior to VSMP approval.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. The PPP is acceptable at this time.
Acknowledged
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.
CIVIL ENGINEERING I ENVIRONMENTAL I SURVEYING I GIs I LANDSCAPE ARCHITECTURE I CONSTRUCTION SERVICES
1. This plan cannot be approved until the Loop Road VSMP and Road Plans have been
approved and bonded.
Acknowledged. The Loop Road VSMP and Road Plans will be approved and bonded prior to
WPO201900034 approval.
2. The riprap below Outlet 100 is shown on a slope and not going into a defined channel.
The riprap outlet has been moved further down the slope to outfall into an existing channel.
3. While the existing pond does provide quality and quantity control for the drainage area,
the discharge from the site will still need to make it to the pond without causing
erosion. Provide measures and/or an analysis to show how the site's discharge meets
DEQ 1113 or IIC quantity compliance.
A 84" CMP Detention system has been provided to meet channel protection and flood
protection requirements. Sheet C6.2 has been revised to provide calculations for this system.
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.
1. Provide perimeter measures below all areas of disturbance.
Additional perimeter measures have been provided to capture as much runoff as possible. See
Sheets C3.2 — C3.4.
We have included PDF copies of the plans and calculations for your review. If you have any
questions or comments, please feel free to give me a call at 434.295.5624.
Sincerely,
John D. Hash, PE
Senior Project Manager