HomeMy WebLinkAboutWPO202200013 Review Comments WPO VSMP 2022-05-05�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: Tjach Premier Circle — VSMP
Project file number: WPO2022-00013
Plan preparer:
Jonathan Showalter, PE / Timmons Group [ ionathane timmons.com ]
608 Preston Ave., Suite 200 / Charlottesville, VA 22903
Owner/Applicant:
PHA Premier Circle LLC, 682 Berkmar Circle, Charlottesville, VA 22901
Plan received date:
24 Mar 2022
Date of comments:
5 May 2022
Reviewer:
John Anderson
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 disapproved 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.
1. Submit SWPPP (please use county template .
a. Ensure (VAR10) CGP Registration Statement is complete. Include ref. to WPO2022-0013 in
SWPPP title.
b. Ensure SWPPP includes PPP Exhibit /SWPPP, Sec. 6.A. Ensure exhibit shows (initial locations
of):
1. Rain gauge
2. Concrete wash -out
3. Vehicle wash station
4. Portable sanitary facility
5. Paint, stucco wash -out /storage
6. On -site fuel station, as needed
7. Solid, non -hazardous waste dumpster
8. Slight depression /catchment for collecting vehicle wash waters, prior to
discharge to ex. storm drain inlet
B. Pollution Prevention Plan (PPP) — See above item Lb.
The PPP content requirements can be found in County Code section 17-404.
C. Stormwater Management Plan (SWMP)
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. General
a. Revise title page of plan, Calc. packet to include ref. to WPO202200013.
b. Revise title of plan, SWPPP, and Cale. packet to eliminate reference to WO Master Plan, a term
without basis in state code. Please revise titles of plan, SWPPP and Calc. packet to read Tjach
Engineering Review Comments
Page 2 of 6
Premier Circle — WPO202200013, Phase I. May include optional subtitle: `Conceptual design for
(Future) phase 2 and 3'.
c. Retaining wall ht. >3' requires a building permit, retaining wall ht.>4-ft. requires sealed, detailed
retaining wall plans. Furnish retaining wall plans for WPO plan approval. Engineering reviews
retaining wall design from spatial rather than building code perspective.
2. C2.2 identifies `SWM Facility to be abandoned.'
a. Please revise calculation packet narrative to clarify that existing stormwater pre -development
HydroCAD routings include the existing SWM facility, that this pre -development (entire) site
discharge reflects attenuating effect of existing on -site SWM facility. Please clarify existing
SWM dry detention basin role in context of pre -development stormwater runoff, as narrative text.
This pre -developed condition establishes baseline for all phases, both Phase 1 and future phase 2
and phase 3. Also, email, county to Applicant, May 4, 2022 5:52 PM.
b. Engineering recommends table for this phase 1 WPO plan to allow this /future WPO plan review
to track existing pre -development land cover across phased WPO plans. For example:
i. Table columns for pre- /post -developed condition for each phase, and for entire site.
ii. Table rows for land cover type/s (impervious, turf, forest) — Values reported in acres.
c. Provide deed bk.-pg. reference for the existing SWM facility. If unknown, provide ref. to
SDP198600037 as plan label.
d. Since existing SWM facility must remain operational for Premier Circle Phase 1 SWM
compliance:
i. Provide As -built drawing of dry detention basin (Knights Inn (Red Carpet Inn) —
SDP198600037). County SWM facility ID, 22.01. Link to site Plan.
[ Note: though county inspects facility, Albemarle cannot furnish As -built required with
WPO plan submittal. ]
1. Verify approximate dimensions of basin.
2. Verify structure #5 control structure.
a. Existing condition reflects design.
b. Fitness for continued service, phase 1, Premier Circle
c. From link to SDP198600037, sheet 8:
f ye
°E�'.°.
KNIGHT'S INN
CgPOHTE UTLRY PLAN
CIXTEII t 9 PG..
Engineering Review Comments
Page 3 of 6
N`
ire 9T4
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i
A
\ EXISTING S RY SEWER
REMOV D ABANDONED
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NOTE, VDHBT 51 STONE AND WIRE MESH SCREENING TO BE IN PLACE DURING CONSTRUCTION
FOR DETENTION BASIN TO ACT AS SEDIMENT POND. STRUCTURE TO BE MAINTAINED
PER STD'S OF VIRGINIA EROSION 8 SEDIMENT CONTROL HANDBOOK. STONE AND MESH
TO BE REMOVED FOLLOWING CONSTRUCTION. ORIFICE TO BE CLEANED AFTER EACH
RAINFALL.
73.8 TOP OF STR. *5 8
100 YR. FLOOD ELEV.
FLOOD ELEV.
72.0 2 YR. FLOOD ELEV. 8 _
INVERT OF UPPER ORIFICE
69,29 INV. OF I8'
PIPE 8 LOWER ORIFICE
VDHBT *1 STONE l
75.B2 MAX. 100 YR. FLOOD ELEV.
D.I. 7, TYPE 3 GRATE
4' DIA. FLATTOP MH
I
8, RIP 0
I
LOWER ORIFICE DIA. - 10 12'
DETAIL FOR STRUCTURE #5
I CONTROL STRUCTURE IN DETENTION POND I
II SCALE , I" = 2'
ii. Confirm critical elevations /pipe slope, etc.
iii. Confirm SWM facility outfall pipe is clear / not obstructed.
iv. Confirm SWM facility is functional (last county inspection was 20 months ago, 9/15/20).
v. Provide plan /profile of existing SWM facility and propose any repair to facility required
to conform with initial facility design.
Engineering Review Comments
Page 4 of 6
vi. Recommend ref label that reads: `County inspection, 9/15/20, indicates SWM facility is
compliant.'
C4.1: Label area NW of phase 1 as turf. List turf acreage once existing impervious buildings /parking are
demolished.
3. C5.0
a. Label phases: 1,2,3.
b. This /other sheets: Please incorporate 15 Apr 2022 SDP202200019 Engineering review comments
into WPO202200013 plan /calc. packet revisions.
i. For example: Engineering will likely not approve 18" DIA HDPE pipe as adequate
replacement for existing 2 1 " DIA RCP as this restricts capacity of conveyance, when
compared with existing conveyance, unless LD-229 compares existing 2 1 " RCP with
proposed 18" HDPE with upstream UG detention. LD-229 may clarify that 18" HDPE
has capacity to convey the post -developed Phase 1 flow adequately to ex. SWM facility,
and should also indicate that 18" DIA HDPE has adequate capacity to convey post -
developed Phase 1,2,3 runoff to existing storm conveyance network once ex. SWM
facility is removed, and UG detention is installed in Phase 2. Lack of capacity may cause
flooding of Premier Circle or U.S. Rt. 29 SBL.
c. Provide TW BW elevation labels, for retaining wall at SW edge of parcel.
4. C5.1
a. Label inlet structures 114, 116, 118.
b. Revise CG-2 to CG-6 wherever grade concentrates runoff against curbing.
5. C5.2
a. Provide VDOT LD-204, Storm Inlet Computations (table)
b. Provide VDOT LD-229, Storm Drain Design Computations (table)
6. C6.0
a. Revise sheet title to Overall Stormwater Management Plan, Phases 1,2,3.
b. In addition, provide storrnwater quantity and quality data for phase 1 (stand-alone), as well as the
entire development. Narrative, calc. packet p. 3, states that `For phase 1, 1.75 acres of disturbance
was analyzed for water quality. Due to the decrease in impervious area in phase 1, no credits will
be required.' Provide plan sheet ref . to calc. packet narrative, and calc. packet pp. that incl.
relevant re -development VaRRM.x1S data.
7. C6.1 / Calc. packet: Revise plan sheet and calculation booklet to:
a. Correlate values reported on plan sheet with values from calc. packet.
b. Revise to include design schematics that identify separate phases, as WPO202200013 will serve as
basis for future phase WPOs. (Phase 2 and 3)
c. Include drainage maps.
d. Include index in calc. packet that points to specific HydroCAD routings by tide /page # in calc.
packet such that values in plan clearly correlate plan with calc. booklet. Please guide reviewer to
calculated compliance values.
e. Cale. packet, p. 42
i. Revise Project Name to: Premier Circle, Entire site (Phase 1,2,3)
ii. Transfer land cover values from calc. packet pp. 42,43 to plan, to tables, preferably,
recommended at item 2.b., above.
f Cale. packet, p. 3 /Narrative
i. Edit to isolate Phase 1 independent of later phases. WPO202200013 provides discrete
design for Phase 1, but only conceptual design for later phases.
ii. Delete reference to Master Plan as WPO202200013 is not being evaluated for overall
(Phase 1,2,3) site compliance, given development is projected to occur under different
owners at different points in time, as independent phases but with dependent SWM
design. Possible subdivision, discrete bonding /easement requirements that cannot be
assigned with accuracy to unknown future (or multiple) owners work against a single
WPO that covers all 3 phases. WPO202200013 is a VSMP /WPO plan that provides
overall (entire site) SWM strategy -concept, and that provides detail sufficient to approve
Engineering Review Comments
Page 5 of 6
plan and grading for phase 1, only. Future phases will require separate WPO submittals
that will reference pre -developed condition first reported with WPO202200013, land
cover conditions that exist on this date, 5/5/22.
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 for reasons listed, below. The erosion control plan content requirements can be found in
County Code section 17-402.
1. C3.3: Farthest area upslope of silt fence (SF), NW section of LOD, contour interval 485-480, appears
to lie >100' upslope of SF. Revise to provide temporary diversion leading to sediment trap, or other
VESCH measure/s, since SF alone appears to provide inadequate perimeter control. The maximum
slope length behind the barrier (SF) is 100' —please see VESCH Std. & Spec. 3.05, Silt Fence.
`Next Steps' after WPO plan approval
Purchase Nutrient Credits (if required)
a. PLEASE coordinate with the County reviewer before working with a nutrient bank. The reviewer
must confirm if your project must follow the DEQ hierarchy requirements.
b. Letter of availability must be provided on the WPO approved plans.
c. Applicant must contact/coordinate nutrient credit purchase with Ana Kilmer,
akilmer"bemarle.org
d. Affidavit of Purchase must be provided to Ana Kilmer before a grading permit can be issued.
2. Post WPO Bond
a. Applicant must submit a `Request to Establish a Bond'form and fee to CDD.
i. Complete the form and email it to akilmer"bemarle.org, along with proof of payment
(see below).
b. Payment can be made either online or with a check.
i. If paying online:
1. Go to the online payment portal.
a. Select WPONSMP as the application `type.'
b. Type in the WPO number and project name in the Notes/Details section of the
form.
C. Type in the `payment amount' as $294.34.
d. Click "Proceed to Secure Checkout" link to make payment.
2. You will receive a receipt in an email.
ii. Email a copy of the receipt to akilmerkalbemarle.org.
c. Once the bond request and payment are received, the applicant can provide the bond estimate
(completed on the County worksheet), or Engineering staff will complete the estimate. Once the
estimate is approved, Ana Kilmer will contact and work with the applicant to post the bond.
Obtain DEQ Permit (if required)
After nutrient credits have been purchased and the bond has been posted:
a. County staff will register the project with DEQ.
b. Applicantloperator listed on the Registration Statement will receive an email with instructions on
how to pay the DEQ permit fee.
c. Applicant must email a copy of the DEQ receipt of payment to charris6dnalbemarle.org.
d. DEQ typically will issue a permit within 2 weeks of receiving payment.
4. Request pre -construction meeting:
a. Complete and email the Request for a Preconstruction Meeting and Grading Permit
to charris(a),,albemarle.om.
Engineering Review Comments
Page 6 of 6
b. Pay the fee via the online payment portal or a check at the pre -construction meeting. If paid
online, email a copy of the receipt to charris(dWbemarle.org.
All steps must be completed before the grading permit can be issued.
County forms can be found on the county website forms center under Engineering Applications:
htti)s: //www.albemarle. org/govemment/community-develol)ment/al)ply-for/engineering-apol ications
Thank you.
Please call if any questions — tel. 434.296-5832-x3069, or email 4anderson20albemarle.org.
WPO2022000013_Fjach Premier Circlephase 1_050522