HomeMy WebLinkAboutWPO202100059 Review Comments WPO VSMP 2022-07-05$ County of Albemarle
m COMMUNITY DEVELOPMENT DEPARTMENT
VSMP Permit Plan Review
Project title:
Crozet Self Storage
Project file number:
WP0202100059
Plan preparer:
Clint Shifflett [Clint.Shifflett@timmons.com]
Owner or rep.:
Brenda Yousef [brendayousef@gmail.com]
Plan received date:
Oct. 25, 2021
Feb. 7, 2022
April 15, 2022
June 10, 2022
Date of comments:
Nov. 24, 2021
March 4, 2022 (Rev. 1)
May 11, 2022 (Rev. 2)
July 5, 2022 (Rev. 3)
Reviewer:
David James [djames2@albemarle.org]
401 McIntire Road, North Wing
Charlottesville, VA 22902-4579
Telephone: 434-296-5832
WWW.ALBEMARLE.ORG
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/approved.
The rationale is given in the comments 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. Please submit the SWPPP. (Rev.1) Addressed.
2. (Rev.1) Cover - Add WPO number. (Rev.2) Addressed.
3. (Rev.1) Registration Statement - Complete & sign. (Rev.2) Addressed.
4. (Rev.1) Complete Section 9 prior to plan approval. (Rev.2) Addressed.
5. (Rev.1) Complete other sections prior to pre -con. (Rev.2/3) Acknowledged.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. Please submit with the SWPPP. (Rev.1) Addressed.
2. (Rev.1) Show SF around stockpile area. (Rev.2) Addressed.
3. (Rev.1) Provide concrete washout detail of containment. (Rev.2) Addressed.
4. (Rev.1) Provide mortar mixing station detail of containment. (Rev.2) Addressed.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
SWMP. This plan is denied, and the reasons are provided in the comments below. The
stormwater management plan content requirements can be found in County Code section 17-
403.
1. Show the building's roof drain connection(s). (Rev.1) Not addressed. (Rev.2)
Engineering Review Comments
Page 2 of 5
Acknowledged. It appears that the roof drain system ties into str. 302 based on the
drainage area map provided. If so, see comments D11 & 12 below. (Rev.3) Addressed.
2. It appears discharge from the site will enter an impaired waterway. The first assessed
waterway appears to be Lickinghole Creek. If so, it is ok to purchase nutrient credits from
within the HUC 02080204, if credits are available. (Rev.1) Acknowledged.
3. Please provide Letter of availability from the nutrient provider on the plans and the HUC
they're in. (Rev.1) Not addressed. (Rev.2) Not able to locate. (Rev.3) Addressed.
4. Please record the SWM maintenance agreement prior to plan approval. (Rev.1/2/3) Not
addressed.
5. Provide lining (type) requirements for constructed channels. (Rev.1) Not addressed.
(Rev.2) Please include the channel cross -sections or a typical section with the
appropriate lining & dimensions labeled. (Rev.3) Addressed.
6. Provide concrete inlet shaping (IS-1) on any structure with a 4' or greater drop. (Rev.1)
Currently addressed.
7. Pipe 207 (public) should be 15" min. diameter. (Rev.1) Provide 15" diameter for pipes
210 & 208. The pipes are considered 'public' as it carries stormwater from offsite and
VDOTs ROW through the site and therefore needs to be 15". [ACDSM, p.141 (Rev.2)
Revise size to 15" dia. for pipes 209 & 207 (public). Str. 210 to 200 (end) & 101 is
consideredpublic. (Rev.3) Acknowledged.
8. Size storm inlet 208 & 100 (DI-1) for half -clogged condition. [VDOT DM] (Rev.1) Provide
for inlets 204. You may want to consider for inlets 100, 210 & 402. (Rev.2)
Acknowledged.
9. Show SWM Facility Easement for basin. (Rev.1) Addressed.
10. Locate trees outside of drainage easements and basin embankment. (Rev.1) Not
addressed. Stormline from Str. 210 to 200 is considered public with a 20-ft wide
minimum easement and trees will need to be removed.
EASEMENT,
J V 1 w R \
(2e�RE Gw \ 103
i- �tO�1LE BUR F.
(22)ECH PUR
(Rev.2) The trees & shrubs within 20' buffer of embankment will need to be removed.
(Rev.3) Not addressed.
11. (Rev.1) Sheet 7.0: Show the HGL in the profiles. (Rev.2) Add note to provide water -tight
seals/joints where HGL is above pipes and at connections between dissimilar material
types. (Rev.3) Addressed.
12. (Rev.1/2/3) Note: Currently 127 TR credits to be purchase prior to WPO bond request. -
Currently needs 1.40 Ib/yr TP.
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.
Engineering Review Comments
Page 3 of 5
1. Cover:
a. Add WPO# under title. (Rev.1) Not addressed. (Rev.2) Addressed.
b. Remove signature panel (not needed for WPO plan approval). (Rev.1) Not
addressed. (Rev.2) Addressed.
2. Sheet 3.0: The narrative, sequence should mention the cleanout and conversion of
sediment trap to a permanent basin. (Rev.1) Not addressed. (Rev.2) Acknowledged.
Revise as necessary to account for area(s) draining to phase 2 sediment trap. (Rev.3)
Addressed.
3. There appears to be 2+ acres drainage area that is not going to the sediment trap (ST1)
and rather the drainage is divided between the two existing culvert inlets to the south.
a. Please verify the area going to the silt fence first (no more DA than '% acre per
100 LF). [VAESC HB, 3.05] (Rev.1) Not addressed. (Rev.2) Addressed.
b. May need to show diversion to IP or trap. (Rev.1) Not addressed. (Rev.2)
Addressed.
4. Sheet 3.3:
a. Label the inlet and/or sediment traps for this phase. Provide design & details.
(Rev.1) Not currently addressed. The trap for ESC phase II will need to remain
until conversion, so it still needs to be labeled and shown. The trap appears to be
acting as a SB this phase with the riser & spillway present. Provide SB design &
details if so, or ST #2 design & details for this phase. (Rev.2) Acknowledged;
believe you will need to account for the additional drainage area (greater than
2ac) to sediment trap, and ST #2 design or alternative would be necessary. See
comment D11 & D12. (Rev.2) Acknowledged.
b. Show OP from pipe into basin. (Rev.1) Not addressed. (Rev.2) Addressed.
c. Provide B/M for west slope. [VAESC HB, 3.361 (Rev.1) Acknowledged.
d. (Rev.2) Provide low -maintenance ground cover (not grass) specified on the plans
for the slopes highlighted or reduce slopes to be 3:1 or less.
(Rev.3) Addressed.
5. Provide 5' (min) distance between bottom of slope and silt fence (or diversion) placement.
[VAESC HB, 3.05; ACDSM]. (Rev.1) Not addressed. (Rev.2) Addressed.
6. Show offsite work in an easement.
a. Obtain VDOT entrance permit prior to land disturbance.
(Rev.1) Not addressed. Response: Entrance permit has been submitted to VDOT and is
under review. (Rev.2/3) Acknowledged.
7. Provide cut/fill volume estimate. (Rev.1) Not addressed. Response: Cut/fill report will be
included in the next submittal. The current design intent is for the site to balance when
accounting for pavement sections and building foundation. (Rev.2) Acknowledged;
adjust report as needed.
8. (Rev.1) Show the drainage area of sediment trap. (Rev.2) Addressed for ST#1.
9. (Rev.1) SF perimeter control should be placed here:
(Rev.2) Addressed.
10. (Rev.1) Diversion perimeter control should be placed here:
(Rev.2) Addressed.
Engineering Review Comments
Page 4 of 5
11. (Rev.2) Sheet 6.3: Account for the roof drainage area as well in sizing pipe 301. (Rev.3)
Please update the table.
12. (Rev.2) Sheet 3.0, 3.2, 3.3: The area to sediment trap given does not account for the
amount of area that will be draining to it during phase II. Please clarify & account for this
area in the total volume needed for the design. (Rev.3) Acknowledged.
Other: email comments (6/9/22):
1. Emergency spillway: Provide a 20' control section and extend spillway to channel.
(Rev.3) Not addressed. Consider UD-3 ors/m/lar to drain underproposed sidewalk.
2. Provide safety fence & warning sign around sediment basin. (Rev.3) Addressed.
3. Extend the SP to IP at the ex. inlet 100. (Rev.3) Addressed.
4. C3.0 - Phase III, #6 mentions trap, change to basin. (Rev.3) Not addressed.
The VSMP permit application and all plans may be resubmitted for approval when all comments
have been satisfactorily addressed. For re -submittals please provide 2 copies of the complete
permit package with a completed application form.
Engineering plan review staff are available from 2-4 PM on Thursdays, should you require a
meeting to discuss this review.
Process:
After approval, erosion and sediment control and stormwater management improvements must
be bonded. The bonding process begins when the plan is approved, and the applicant submits a
bond estimate request form and fee to the Department of Community Development. A plan
reviewer 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 need to be completed by the owner and submitted along with cash, certificates or sureties
for the amounts specified. The agreements will need to be approved and signed by the County
Attorney and County Engineer. This may take 2-4 weeks to obtain all the correct signatures and
forms.
Stormwater Management Facilities Maintenance agreements will also need to be completed and
recorded. The County's Management Analyst or other staff will prepare the forms and check for
ownership and signature information. The completed forms will need to be submitted to the
County, who will record the agreement.
After bonding and agreements are complete, county staff enters project information in a DEQ
database for state application processing, if a DEQ permit is required. DEQ reviews the
application information based on local VSMP authority approval. At this time, the DEQ portion of
the application fees will need 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, which must be posted at the construction site.
Engineering Review Comments
Page 5 of 5
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 form 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;
httos://www.albemarle.oriz/¢overn ment/community-development/aooly-for/enizineeri n¢-aoolications