HomeMy WebLinkAboutWPO202100069 Review Comments WPO VSMP 2022-01-06�q off nig 401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
County of Albemarle Telephone: 434-296-5832
COMMUNITY DEVELOPMENT DEPARTMENT WWW.ALBEMARLE.ORG
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VSMP Permit Plan Review
Project title:
Scottsville Tiger Fuel Market
Project:
WPO2021-00069
Plan prepares
Shimp Engineering, 912 E. High St., Charlottesville, VA 22902
Chris Marshall, PE — chris e shimp-en ing eerieg com
Owner /Applicant:
James River Road LLC, 200 Carlton Road, Charlottesville, VA 22902
Applicant:
Gordon Sutton, 200 Carlton Road, Charlottesville, VA 2290
[ suttong&a tieerfuel com ]
Plan received date:
7 Dec 2021
Date of comments:
6 Jan 2022
Reviewer:
John Anderson, PE
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 for reasons listed below. 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.
SWPPP
1. Please ensure SWPPP cover includes reference to VVM2021-00069.
2. Submit SWPPP using county template located at:
httos: //www.albemarle. ore/home/showDublisheddocument/ 166/637202310327530000
a. Sec. 1: Registration Statement; please complete. Feel free to call if any questions.
b. Sec. 6.A.: PPP Exhibit: Please show initial location of.
i. Rain gauge.
ii. Portable sanitary facilities (ports John), as required.
iii. Covered non -hazardous waste dumpster, if required.
iv. Vehicle wash waters, draining to trapping measure (Not a sediment trap design, per se,
but shallow depression — 1-2 backhoe buckets. Avoid direct drainage to Ex. storm
system, or pond/s.)
v. Concrete wash -out.
vi. On -site fuel, if required.
vii. Paint, stucco, chemical storage, if required.
c. Sec. 6E: List named individual responsible for PPP measures.
d. Sec. 8: Although county personnel will inspect, Applicant is required to retain qualified
(contractor/third-party) E&S inspection personnel to perform ESC inspections and evaluate
compliance relative to VESCH, Yd Edition, 1992.
e. Sec. 9: Ensure Signed Certification is signed and dated.
B. Pollution Prevention Plan (PPP) —see SWPPP item 2.b., above
The PPP content requirements can be found in County Code section 17-404.
C. Stormwater Management Plan (SWMP)
Engineering Review Comments
Page 2 of 4
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a SWMP. This
plan is disapproved for reasons listed below. The stormwater management plan content requirements can be
found in County Code section 17-403.
1. Bioretention that receives `runoff from hotspot land uses should not be treated with infiltrating bioretention
(i.e., constructed without an underdrain).' Ref. VA DEQ Storrnwater Design Specification, p. 15 of 54,
Hotspot Land Uses. Provide `an impermeable bottom liner and an underdrain system,' per DEQ design
specification for hotspot land use.
2. Show and label bioretention Level 1 pre-treatment on C6 profile. Ref. VA DEQ Spec. 9, Table 9.3.
3. Include VA DEQ Specification No. 9 Table 9.6 Bioretention Material Specifications on the plan.
4. Include VA SWMH Inspection guidelines for bioretention on the plans —sent to Applicant as .PDF.
5. Include VA DEQ Specification No. 9 Bioretention installation, maintenance, and periodic inspection
measures on the plan, these items begin at p. 34 of DEQ Design Specification No. 9.
https:Hswbmyvwrrc.wp.yrod.es.cloud.vt.edu/wp-content/ui)loads/2017/11 BMP-Snec-No-
9 BIORETENTION vl-9 03012011.pdf
6. Include Construction Record Drawings (As -built) for VSMP document on the plans, link:
httos://www.albemarle.org/home/Showpublisheddocument/3381 /637327510536700000
7. C3
a. Show carwash wastewater discharge line in plan and profile, between carwash and sanitary
collection (San. MH).
b. Wherever storm runoff concentrates against curb, provide and label curb/gutter, CG-6.
8. Provide letter of nutrient credit availability for proposed 0.96 lb. nutrient credit purchase. Nutrient credit
purchase is not required for WPO plan approval, but is required to receive a Grading Permit.
9. C6
a. Provide detention pond 22 LF emergency spillway detail (plan/profile).
b. Provide bioretention planting plan, see VA DEQ Specification No. 9, Table 9.3.
c. Label bioretention and detention pond critical elevations, for example: floor of each facility, stone
layer INV, riser INV. If riser DIV = 2.5" control orifice INV Elev. 396.00, please state this.
d. Provide detention pond riser foundation detail, provide buoyancy calculations.
e. Provide embankment Notes /design: cutoff trench, anti -seep collar details, etc., for detention pond.
f. Label bioretention basin and detention pond side slope (3: 1, for example).
g. Request exception from Min. 3" orifice size, examine alternative designs that permit Min. 3"
orifice size.
10. C 10: Label detention pond outfall riprap dimensions, L x W x D.
11. Provide 36" riser low -flow orifice debris cage, and debris cage detail.
12. C 1: Revise plan title to include ref. to WPO202100069.
13. Calc. packet
a. Revise title pg. (letter d. 12n121) to include ref. to WPO202100069.
b. Pg. 36 of packet NaRRM.xls indicates 0.12 Ac. forest /open space post -developed land cover.
Provide deeded easement for 0.12 Ac. (FOS easement), else revise VaRRM.xls post -developed
land cover table to reflect 0.0 Ac. forest /open space. Adjust SWM approach, as needed, to meet
water quality compliance requirements at 9VAC25-870-65.
14. Provide SWM facility /Access easements via separate easement plat application. Link to application:
httos: //www.albemarte. org/home/Showpublisheddocument/ 1052/637624089314100000
15. Provide and label SWM facility access. See requirements at ACDSM, p. 12" Best Management Practices
for Stormwater Management. Provide mountable curb and other minimum features required for vehicular
access to detention pond dam.
16. Note: Easement plat must be recorded prior to WPO plan approval.
17. Note: SWM facilities are located on TMP 130A1-00-00-047B0; owner of TNT 130A1-00-00-047BO is a
required party to SWM Facility Maintenance Agreement, and WPO plan bond.
D. Erosion and Sediment Control Plan (ESCP)
Engineering Review Comments
Page 3 of 4
Virginia Code §62.1-44.15:55 requires the VESCP authority to approve or disapprove an ESCP. This plan
is disapproved for reasons listed, below. The erosion control plan content requirements can be found in
County Code section 17-402.
1. Provide labels that distinguish which is sediment trap 1, which is ST2, consistent with C 11 ST tables.
2. STl adjacent to Valley Street, Rt. 20: Please increase trap size so that ST failure is less likely, and any
failure is less severe. Roadside ditch -line topography may not readily accommodate release of sediment -
laden water. Please target 25% increase above minimum required volumes. If design volume is the strict
design minimum, then any failure will be hard to remedy. It will be difficult to increase trap size, later.
3. Include paved wash rack detail on plans, ref. p. 8, ACDSM, link:
hftpS7//www.albemarle.orp/Home/ShowDocument?id=270
4. C8 C9C9: Provide silt fence between diversion dike and Rt. 20.
5. C8
a. Label trap floor dimensions.
b. Indicate stockpile location, if any.
c. Area upslope of SF along southwest limits of disturbance exceeds 100 LF. Revise to provide
additional or alternative VESCH measures, since upslope length above SF is 100' Max.
d. Label drainage areas for each trap that correspond with CI I DAs (L36, 0.84 Ac.).
6. Provide interim ESC plan and sequence that anticipate ESC measures required to transition ST2 to a
detention pond while maintaining adequate ESC that prevents off -site sediment release. PH ESC plan
shows a perimeter sediment trap. Ph2 ESC shows biofilter, and a detention pond that occupies sediment
trap (ST2) location without any indication how site runoff will be controlled as site transitions from Phl to
Ph2. During transition, site runoff must be controlled with adequate ESC measures at south edge of site.
7. Provide Note that bioretention may not be constructed until all upslope areas are stabilized.
8. Provide SAF along Rt. 20 and Rt. 726.
9. If unbalanced cut/fill site, if export is required, please note destination for off -site export.
Process:
After approval, plans will have 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 have to be completed by the owner and submitted along with cash,
certificates or sureties for the amounts specified. The agreements will have to be approved and signed by the County
Attorney and County Engineer. This may take 24 weeks to obtain all the correct signatures and forms.
Stormwater Management Facilities Maintenance agreements will also have to be completed and are recorded. The
County's Management Analyst or other staff will prepare the forms and check for ownership and signature
information. The completed forms will have to be submitted along with court recording fees.
This project proposes nutrient credit purchase 0.96 lbs. and requires SWM facility and SWM facility access
easements. This project may also require forest -open space easement (for SWM purposes).
After bonding and agreements are complete, county staff will 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 have 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.
Engineering Review Comments
Page 4 of 4
After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction conference.
Applicants must complete the request for a pre -construction conference foam, 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 Applications:
httos: //www. albemarle. org/government/community-develonment/aooly-for/engineering-anal is ations
Thank you.
Please call if any questions — tel. 434.296-5832-x3069, or email 4anderson2&albemarle.org.
WPO202100069—Scottsville Tiger Fuel Mkt OI0622