HomeMy WebLinkAboutWPO202200050 Correspondence 2023-01-11 (3)a$ County of Albemarle
m COMMUNITY DEVELOPMENT DEPARTMENT
VSMP Permit Plan Review
Project title: VSMP Plan for Forest Lakes Self -Storage
Project file number: WPO2022-00050
Plan prepares Shimp Engineering, 912 E. High St., Charlottesville, VA 22902
Chris Marshall, EIT, chrisAshimo-engineering.com
Applicant: JA-ZAN Limited Partnership [ 250gto(&,,oeosicva.com ]
P.O. Box 9035, Charlottesville, VA 22911
Plan received date: 9 Dec 2022
Date of comments: 29 Dec 2022
Reviewer: John Anderson, PE
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 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. Revise title pg. of SWPPP to reference WPO2022-00050.
2. Once revisions complete, include I I" x 17" plan inserts, Sec 4 /5 (ESC /SWM plans).
3. Sec. 1 /Registration Statement:
a. Sec. B.F. —List `Albemarle County' since project located in Albemarle County MS4.
4. Sec. 8: List /name qualified personnel responsible for SWPPP inspections.
Required for Grading Permit, not plan approval.
5. Sec. 9: Signed Certification (is blank): Complete form with next submittal.
6. Sec. 11: Insert 26-p. 2019 VAR10 CGP. Available at this link.
B. Pollution Prevention Plan (PPP) — See above.
The PPP content requirements can be found in County Code section 17-404.
1. Sec. E: List named individual responsible for PPP (required for Grading permit, not plan approval).
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. C1
2. C2
a. Revise WPO plan title and Calc. packet title to include reference to WPO2022-00050.
b. Recommend also ref. WPO2022-00049 Maplewood Development, TMP 46134-4 /adjacent parcel
a. Show EOP, Worth Crossing. EOP label provided, but not linework matching EP. It is typical to
show roads clearly w/ identifiable EP features (gray solid line). Only existing contours and Worth
Crossing and EOP labels are provided, but not distinct EP linework, which is now requested.
Engineering Review Comments
Page 2 of 5
b. Depict and label:
i. Existing buildings, parking, improvements, etc. on adjacent parcels that lie within 100' of
TMP 46B4-3 parcel boundaries. Much detail is shown, but check image, below:
in
well as C3.
3. C3
a. Show /label CG-6, rolltop, and CG-2 curbing. Note item b. below, request to revise CG-2 to CG-
6 in specific locations.
b. Wherever runoff concentrates against curbing provide CG-6 curb and Butter, not CG-2 curb alone.
4. C4
a. Label detention pond emergency spillway dimensions, L x W x D. Alternatively, label at C8.
b. Provide spot elevations that define earthen /grass emergency spillway cross-section.
c. Provide ( w/ CIO) emergency spillway cross-section, provide spillway geometry.
d. Label emergency spillway grass.
e. Label swale created by proposed contours. Also, ESC plan review item 3.b. below.
f. Label Sir. at end of 15 LF 12" HDPE (Applies to C3, as well. Provide profile Str./15LF pipe, C5).
g. Provide spot elevations at Str. Bl to ensure positive drainage.
h. Provide proposed contours as needed at grate inlet, Str. BI. Applies to C8 as well.
i. Items g.-h., above, apply to unlabeled structure at item f., above.
j. Provide SWM facility sign for pond that warns of risk of detained water and forbids trespass.
Sample sign follows SWM review item 10., below.
5. C5
a. Show Aabel detention pond principal riser base in storm profile AO-A5 (riser = Str. Al).
b. Label riser base, concrete/steel. Label base dimensions (Lx W x D).
c. Provide buoyancy calculations for riser /base.
d. Label detention pond floor elevation (513').
e. Coordinate sediment basin dewatering device, elev. 514.5', with mid -flow 4" orifice, elev. 514'.
Coordinate dewatering and 4" permanent orifice in separate vertical planes (offset locations).
6. Sheet 12/ Calc. packet, p. 2 propose purchase of 3.37 lb. nutrient credits to meet 9VAC25-870-65
requirements. Incl. letter of nutrient credit availability for project from Ivy Creek Nutrient bank on the
plan. Project discharges to Powell's Creek /S. Fork Rivanna River, impaired streams. Ivy Creek is the
only nutrient bank that meets DEQ eligibility criteria for impaired streams in project HUC. Please
Engineering Review Comments
Page 3 of 5
coordinate with Ana Kilmer, 434.296-5832 -x3246 ( akilmeda),albemarle.org) prior to purchase to ensure
bill of sale /Affidavit include requisite project data. Nutrient purchase not required for plan approval but is
required to receive a Grading Permit.
7. Check LD-229 table, o. 61, Calcs: Provide design for `A' series storm line. Additional comments possible.
8. SWM /public drainage easement plat (and off -site temporary construction) easement plat recordation is
required for WPO plan approval.
9. A recorded Maintenance Agreement is required for WPO plan approval.
10. Proof of nutrient credit purchase, state VAR10 CGP (LOD =3.29 Ac.), SWPPP update (Sec. 6E/8), and
WPO plan bond required prior to receiving a Grading Permit.
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. C10
2. C9
3. C8
a. Provide Contech StormRax or similar storm rack /riser cover detail for detention basin.
a. Include paved wash rack detail, see p. 8, ACDSM.
a. Although Maplewood Development (parcel to N) final site plan (SDP202200067) and WPO plan
(WPO202200049) appear to suggest near -terra development, should these plans fall through:
i. Provide offsite grading easement on TMP 046B4-00-00-00400, Maplewood Investments
LLC. Grading easement are shown on C3, C4. Fumish copy of recorded off -site
easement (required for WPO plan approval).
ii. Provide ROE (Right of Entry) Letter Agreement, between TMP 046B4-00-00-00400
owner and Canty of Albemarle that allows ESC inspector entry to TMP 46B4-4.
iii. Note: Once a WPO plan is approved, SWM Agreement is recorded, and Grading Permit
issued for Maplewood Development (TMP 46B4-4), Albemarle will have right to enter
adjacent parcel, but development plans often change, so i./ii. are required, unless iii.
Engineering Review Comments
Page 4 of 5
iv. Regardless of status of Maplewood Development, if Forest Lakes Self -Storage receives
plan approval, then, absent ROE ii. above), Maplewood (Owner, TMP 461344) must be
party to ESC plan bond, since ESC measures for TMP 46134-3 (Self -Storage) are located
on 461344 (Maplewood). This requirement is inflexible until such time development of
TMP 461344 advances to point that no self -storage ESC measures are located on TMP
46134. All of this (item. 3.a.i.-iv. may be avoided if Forest Lakes coordinates WPO plan
design with Maplewood Development design (Collins Engineering) to show no grading
and no ESC measures on TMP 46134-4. Either option is acceptable: 3.a.i: iii, or 3.a.iv.
b. Label swale between contours 520' and 515' /grate inlet created by proposed contours east of
detention pond. Also, SWMplan item 4.e., above.
c. Provide and label EC2 for swale, item b., above.
d. Relocate B2, B 1 structure labels or 520', 524' contour labels so structure labels are readable.
Comment applies to sheet C4 as well.
e. Label ditch -lining for ditch between multi -use path and Worth Crossing (EC-3, or EC-2).
f. Provide cross -sections for swale /ditch, items b., e.. above.
g. Relocate IP label at Str. A3 since this label obscures A3 label.
h. Provide ESC Ph 1-A plan that depicts mass grade of site, perimeter controls, and diversions, incl.
RWD at PCE at Worth Crossing.
i. Ph 2 ESC plan Sequence of Construction references RWD, depict RWD at Worth Crossing on Ph
1-A plan.
j. Revise Ph 2 Sequence to require removal of all sediment and saturated material from sediment
basin floor to at least detention pond floor elevation prior to converting SB to detention pond.
Specify adequate disposal of saturated SB excavate.
k. Provide silt fence at Worth Crossing.
1. Provide and label safety fence between 10' multiuse path and construction site once multi -use path
is constructed. Furnish notes Aabels to guide installation of safety fence.
in. Provide /label SWM facility access
i. At access, replace CG6 with roll-top curb.
ii. Recommend SWM access be opposite 22.33' opening, south face of building.
iii. Ref design at ACDSM, p. 12 — adequate vehicle access, 10' width graded at < 20%.
iv. SWM facility access must not conflict with DI A3.
v. Comment applies to additional sheets.
4. CT Provide silt fence at Worth Crossing.
5. C4: Label riprap outfall dimensions (BO x 2, A2). L x W x D. Alternatively, label dimensions at C8.
Detail 6, C9, provides dimensions, but please label dimensions in plan view, as well.
'Next Steps' after WPO plan approval
Purchase Nutrient Credits (3.37 lb. required)
a. PLEASE coordinate with the County reviewer before working with (Ivy Creek) nutrient bank. The
reviewer must confirm if your project must follow the DEQ hierarchy requirements (Ivy Creek is only
eligible nutrient bank since project discharges to S. Fork Rivanna River, which is impaired).
b. Letter of availability must be provided on the WPO approved plans.
c. Applicant must contact/coordinate nutrient credit purchase with Ana Kilmer,
akilmergalbemarle. 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 'Reauest 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:
Engineering Review Comments
Page 5 of 5
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 akilmergalbemarle.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, required since LOD =4.09 Ac.)
After nutrient credits have been purchased and the bond has been posted:
a. County staff will register the project with DEQ.
b. Applicant/operator 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 charris(a),albemarle.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 e albemarle.org.
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 e albemarle.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:
httos: //www.albemarle. org/government/community-develoument/aonly-for/engineering-anal ications
Thank you.
Please call if any questions — tel. 434.296-5832-x3069, or email 4anderson2(a)albemarle.org.
WP0202200050—Forest Lakes self storage122922.docx