HomeMy WebLinkAboutWPO201600070 Review Comments Plans Reviewed By 2017-04-06COUNTY 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 title: Belvedere Phase IV A
Project file number: WP0201600070
Plan preparer:
Collins Engineering [scott@collins-engineering.com]
Owner or rep.:
Belvedere Station Land Trust [rhauser@stonehaus.net]
Plan received date:
14 Nov 2016
7 March 2017
Date of comments:
19 Dec 2016 (Rev. 1)
6 April 2017 (Rev.2)
Reviewers:
David James — VSMP
Geoff Elsie -- VESCP
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. The
rationale is given in the comments below. The application may be resubmitted for approval if all
of the items below are satisfactorily addressed. 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.
Section 1 — A signed DEQ Registration Statement needed as part of SWPPP
(Rev.2) Partially addressed. #9 areas given appear different from what is shown on the
plans.
2. Section 2 - Provide a copy of DEQ coverage letter when obtained
(Rev.2) Acknowledged.
3. Section 10 — Complete/sign Delegation of Authority
(Rev.2) Acknowledged.
4. (Rev.2) Section 4 — Provide reduced size copy of ESC plan
5. (Rev.2) Section 5 — Provide reduced size copy of SWM plan
6. (Rev.2) Provide an additional copy of your SWPPP. Two (2) are needed.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17-404.
1. Show and label potential pollutant sources on the "exhibit sheet" that are on the list marked in
Section 6 of SWPPP; Update your PPP "exhibit sheet" showing these sources.
(Rev.2) Addressed; add to SWPPP.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25-870-108 requires the VSMP authority to approve or disapprove a
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SWMP. This plan is disapproved, 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. Cover sheet: Sign and date engineering seal (Ref. 18-32.6.1).
(Rev.2) Not addressed.
2. Show callouts for any permanent ditches/channels. These should have typical sections, and design
calcs on plans (designed to meet part II(B) requirements).
(Rev.2) Addressed with an approved Road Plan.
3. Proposed slopes greater than 3:1 to have low maintenance (not grass) ground cover specified on
plan (Design Manual, sect. 8A).
(Rev.2) Sheet 2 -- Include note that an approved groundcover type/species will be installed
on disturbed areas of slopes greater than 3:1 as a final stabilization measure as shown on the
ESC plan.
4. Confirm depth to seasonal high groundwater table and bedrock (minimum 2 ft. below the design
bottom of the facility).
(Rev.2) Geotechnical tests are required per VADEQ SW Design Spec. 15, Sect. 5 (Soils) and
Sect. 6.3 (Required Geotechnical Testing). Geotechnical report should address all
requirements.
5. Show area of Forest/Open Space to be protected for phase IVA.
(Rev.2) Acknowledged. Areas of Forest/Open space to be Areas of undisturbed Forest/Open
space shall be protected as such in agreements, deed of dedication of easement, and platted
within an easement.
6. Ext. Detention: Show dimension and sizing of ED components in the details (i.e. orifice). A 24-hr
target drawdown time recommended; provide design storm stage storage elevations for ED, and
drawdown times calcs. [Note: A minimum 10 acres DA is recommended for ED to function properly.
There are higher maintenance requirements for ED with DA < 10 acres.] Provide landscaping plan
(VADEQ SW Design Spec. 15).
(Rev.2) The reverse slope pipe is shown extending to the floor of micropool, and should
extend to mid -depth of micropool as noted on Design Spec. 15, Sect. 6.5. Include note /
provide for the aquatic bench and metered rod for forebay (Sect. 6.4). Provide
documentation of `previously reviewed and approved routing calculations' (not found). Per
the design for a level 1 ED, if a 12-24 hr drawdown time cannot be met than your design
fails criteria. Provide/Show design storm elevations in profile views.
7. There appears to be pollutant load remaining (VRRM worksheet), before considering purchasing
credits, consider implementing further upstream PR practices. Describe how the chosen practice
fits into the overall SWM strategy. Were other practices considered and found insufficient?
(Rev.2) Acknowledged.
8. Please contact Ana Kilmer for information about nutrient credit purchasing documentation and
requirements.
(Rev.2) Acknowledged; Purchase of credits is required before plan approval.
9. (Rev.2) Cover sheet: Include the WPO number; Change project info in side title block from
FINAL ROAD & UTILITY PLAN to VSMP PLAN.
10. (Rev.2) Sheet 6 - Correct `Proposed Subarea A Impervious' area tables
11. (Rev.2) VRRM spreadsheet submitted needs to be reviewed and corrected. Values are
inconsistent with what's shown in the plans (e.g. PR is 1.34 in plans & 1.83 in spreadsheet).
12. (Rev.2) There are inconsistent amounts in the plan for drainage area to basin (4.25 vs. 3.25).
Show overall drainage area map, drainage divides, and subareas (Pre- & Post-).
D. Erosion and Sediment Control Plan (ESCP)
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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.
1. Bondstone Owner signature needed on VSMP application.
(Rev.2) Addressed.
2. Need Signature on plans from PE.
(Rev.2) Not addressed.
3. Correct Baffle call out on Basin 1 Detail.
(Rev.2) Addressed.
4. Add Inlet Protection for Phase II wash rack. Need Inlet Protection for Basin IA.
(Rev.2) Addressed.
5. Remove 12' length of 6" pipe shown on basin detail leading to micropool. Show stub and cap at
the low flow orifice.
(Rev.2) Addressed.
6. (Rev.2) Show IP/OP details.
7. (Rev.2) Use diversion instead of SF alongside Fowler Street.
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, plans will need 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 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 along with court recording fees.
After bonding and agreements are complete, county staff will need to 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 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. This should be copied to the county.
After DEQ coverage is issued, via the coverage letter, the County can hold a pre -construction conference.
Applicants will need to 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
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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;
http://www.albemarle. org/deptforms.asp?department=cdengwno
File: WPO201600070_Belvedere Phase IVA - VSMP - 4-17 Review(2).doc