HomeMy WebLinkAboutWPO201500085 Review Comments 2016-06-13COUNTY 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:
Charlottesville Self Storage at Crozet, VSMP
Project File Number:
WP0201500085
Plan preparer:
Scott Collins/Graham Murray, Collins Engineering [200 Garrett St., Suite K,
Charlottesville, VA 22902, scott(cDcollins-engineering.com]
Owner or rep.:
H.M. Walker, Jr./Albemarle Storage, LLC, P. O. Box 332, Charlottesville, VA 22902
Jo Higgins, Project Development LLC, 2564 Mt. Torrey Road, Lyndhurst, VA 22952
T: 434.326-0334 1 musxit&aol.com
Plan received date:
26 Oct 2015
(Rev. 1)
17 Feb 2016
Date of comments:
10 Dec 2015
(Rev. 1)
28 Feb 2016
Reviewer:
John Anderson
Note/Current bond amounts: $4,500 remains on WPO/ESC (BND200500021 WP -SE); $62,000 (original) remains on
WPO/SWM bond (BND200500022WP-SW).
Note above (current bond Amt.) included with WP0201500020; will confirm if still valid/ if any change since Apr -2015.
A. Stormwater Pollution Prevention Plan (SWPPP) —See File WP0201500020 for 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.
B. VSMP: SWPPP: Stormwater Management Plan (WP0201500085)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This plan
is disapproved for reasons provided in comments below. The stormwater management plan content requirements
can be found in County Code section 17-403.
CV/Initial submittal comment: Request to amend WP0201500020 to remove an approved BMP
with subsequent increase in amount of phosphorus leaving any point of discharge, or increase in
volume or rate of runoff, would forfeit Grandfathering Part II C technical criteria. This means,
were the bioretention facility removed, the self -storage facility SWM design must comply with
Part II B water quality and quantity requirements (9VAC25-870-65 / 9VAC25-870-66). We
discussed proposal with DEQ, have sent email to DEQ to confirm our understanding, but have not
heard back. Amendment application was discussed with the County Engineer and Department
Director. We have waited sine 8 Dec for DEQ response to attached email, and will forward any
correspondence we receive. WP0201500020 may not be amended to remove approved
bioretention near building G unless SWM design provides on-site features compliant with Part II B
technical criteria. (Rev. 1) Addressed.
Engineering Review Comments
Page 2 of 2
2. Recommend revise Plan Title to include Amendment to WP0201500020.
3. Edit [text box] Note, sheet 4, to reference WP0201500020. Reference to WP02005-00012 neglects recent
VSMP Approval for this facility (22 Apr 2015), leaving gap similar to reference to approved SWM facility
at Avinity Estates. This may mislead in terms of existing, valid VSMP permit approval. This Amendment
seeks to modify WP0201500020 for a portion of the facility.
4. 2- , 10 -yr (routed) flows indicate design sufficient to attenuate developed runoff to less than pre -developed
runoff rates, but before system design can be approved, please:
a. Provide graphic exhibit of pre- /post -developed areas to show how/where development decreases
impervious area 0.05 Ac. (2,178 SF)
b. Revise Str. 2 INV out to Str. 8 (bypass) < 642.46' (=30" DIA pipe elevation at weir plate, Str. 4)
to avoid surcharge condition at weir plate. Appears reasonable to set bypass < this elevation.
c. Specify 30" weir plate material —not HDPE; specify steel gauge.
d. Specify 30" detention system material. (HDPE?)
e. Amendment Calculations (Jan 27 2016) exclude bypass from routing, yet include Str. 4 Access,
with INV =644.7' (TOP Str. 4). At Elev. 642.46', bypass activates (2.b., above). It appears
bypass will influence routing, and should be included/considered. Please feel free to call to
discuss.
f. Revise routings, as needed.
g. Please provide Contech material/labor estimate of Duromaxx system (installed expense) to
improve bond estimate (this is a request, not a requirement; it's been very helpful in the past).
This value will be compared with existing SWM bond, with goal of continuing current SWM
bond, for sake of simplicity.
5. Amended Storm Sewer label (sheet 4A) states VDOT ST -1 required for several structures. Other structures
appear to require ST -1 (steps); please ensure labels identify all structures requiring VDOT ST -1 (steps).
C. VSMP: SWPPP: Erosion Control Plan (WP0201500085)
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESOP. This plan is disapproved
for reason/request for minor revision listed below. The erosion control plan content requirements can be found in County
Code section 1717-402.
Minor: Sheet 2, Sediment trap 1 design table, 16' width; plan view, 26'. Please reconcile.
Process:
If current bonds are sufficient, we will skip to pre -construction. A pre -construction meeting may have been held
following VSMP permit approval, Apr -2015. I am uncertain. I am uncertain beyond point of Apr -2015 approval.
Project holds valid VPDES CGP: VARlOG818 (Albemarle Storage LLC; Estimated Area to be disturbed =1.67 Ac).
At pre -construction conference (if required), should everything proceed satisfactorily, a grading permit will be issued
by the County so that work may begin.
Todd Shifflett is contact for fee and pre -construction process questions; Tel: 434.296-5832 —x3072.
County forms can be found on the county website forms center under engineering;
http://www.albemarle.org/deptforms.asp?departinent--cdengmTo
File: WP0201500085_VSMP_Charlottesville self-storage_022816revl
Short Review Comments Report for:
WPO201500085
SubApplication Type:
Charlottesville Self Storage at Crozet - VSMP - Amendment
Stormwater Management/BMP Plan
Erosion and Sediment Control Plan
Minor Amendment
Date Completed:12/10/2015
Reviewer:John Anderson CDD Engineering
Review Status:Denied
Reviews Comments:Request to amend WPO201500020 to remove an approved BMP with subsequent increase in
amount of phosphorus leaving any point of discharge, or increase in volume or rate of runoff, would
forfeit Grandfathering Part II C technical criteria. This means, were the bioretention facility removed,
the self-storage facility SWM design must comply with Part II B water quality and quantity
requirements (9VAC25-870-65 / 9VAC25-870-66). We discussed proposal with DEQ, have sent
email to DEQ to confirm our understanding, but have not heard back. Amendment application was
discussed with the County Engineer and Department Director. We have waited sine 8 Dec for DEQ
response to attached email, and will forward any correspondence we receive. WPO201500020 may
not be amended to remove approved bioretention near building G unless SWM design provides
on-site features compliant with Part II B technical criteria. Please call if any questions. Thank you.
janderson2 12/10/2015 8:58 AM
Division:
Date Completed:02/28/2016
Reviewer:John Anderson CDD Engineering
Review Status:Denied
Reviews Comments:
Division:
Date Completed:06/13/2016
Reviewer:John Anderson CDD Engineering
Review Status:Approved
Reviews Comments:Note:
It is unclear if current SWM bond is sufficient. Mfr. estimate of $12,000 site-delivered material
expense (which does not include installation) requires bond; this may be offset (partially or in whole)
by the original $62,000 SWM plan bond that includes a biofilter not to be built with this plan. A
pre-construction meeting may have been held following VSMP permit approval, Apr-2015. I am
uncertain. I am uncertain beyond point of Apr-2015 approval.
Division:
Page:1 of 1 County of Albemarle Printed On:February 10, 2017