HomeMy WebLinkAboutWPO201400087 Review Comments WPO VSMP 2014-11-03� OF AL
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COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902 -4596
Phone (434) 296 -5832 Fax (434) 972 -4126
Project title:
Project file number:
Plan preparer:
Owner or rep.:
Plan received date:
Date of comments:
Reviewers:
VSMP Permit Plan Review
The Lofts at Meadowcreek
WPO- 2014 -00067
WW Associates, Inc.
Bluestone Land, LLC
1 October 2014
3 November 2014
Justin Deel
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 ESOP, (3) a SWMP, and (4) any TMDL measures necessary.
1. Please use the standard template from the county website.
2. Provide SWPPP documents as a stand -alone package. Do not include them as part of the site plan
package, as the zoning site plan approval will not be a valid VSMP approval.
B. Pollution Prevention Plan (PPP)
The PPP content requirements can be found in County Code section 17 -404.
1. Not found.
C. Stormwater Management Plan (SWMP)
VSMP Regulation 9VAC25- 870 -108 requires the VSMP authority to approve or disapprove a
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. The dam cannot have a sanitary sewer line or manhole in it.
2. Any basin should have 3:1 slopes for maintenance and safety [VSMH Vol. 1, 3.01 -13]
3. The County BMP spreadsheet is no longer acceptable. Please provide water quality calculations
according to the State regulation 9VAC25- 870 -62 etc., for Part IIC criteria.
4. Provide a drainage area map for each area used in calculations.
5. Stormwater narrative references July 14, 2014, and should be July 1St
6. Stormwater narrative references "Level 1" biofilter, which implies Part IIB criteria. See comment
3.
7. The area used in required biofilter surface area calculations (49,760 sf) is different than the given
Engineering Review Comments
Page 2 of 3
impervious area (45,073 sf). Additionally, the total impervious area used in County BMP
spreadsheet is 47,650 sf.
8. Appears that more than a biofilter may be required.
9. Pollutant removal calculations reference "Level 1" biofilter. This is new (I11B) criteria language.
Please revise computations to follow IIC criteria.
10. Bioretention details reference "Level 2" (new criteria language). Please provide Type HC details.
Use basin sizing methodology found in VSMH Vol. 1, 3.11 -13.
11. Your bioretention facility detail calls for a 12 inch minimum ponding depth. The maximum
ponding depth is 6 inches for a bioretention basin. (VSMH Vol. 1, 3:11 -3)
12. Provide actual sections, to scale, for bioretention details, showing both existing and proposed
grades.
13. Predeveloped SWM drainage map extends off property. Pre- and post - developed drainage areas
appear an invalid basis for compliance. There does not appear to be a reason for this, and it affects
the computations (Tc, CN, etc.) significantly. Please use the point of discharge from the site,
which will restrict the drainage areas to the site itself.
14. DD at SW side of property appears to divert to neighboring property.
15. The hydrograph reports were not reviewed, as it is excepted that changes to the slopes, access,
retaining walls, and avoiding the sewer location will necessitate redesign.
16. Provide sheets which are titled and clearly provide a stormwater management plan. Only
computations and maps were found. (These cannot be approved as part of a site plan.) Include
soil types.
17. Label contours on drainage plan.
D. Erosion and Sediment Control Plan (ESOP)
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. Please do not show piping in the sediment trap, unless it is to be a sediment basin. If a stormwater
basin is to be used, it should be designed as a sediment basin also, so that the piping in the dam is
installed once for both the temporary and the permanent control.
2. The first phase of the E &SC plan must not have site improvements which will not be there at start.
Show all measures to be installed as a first step in any land disturbance.
3. See site plan comments regarding critical slopes, walls, slopes, etc. A redesign may be required.
4. Provide silt fence around the site perimeter.
5. The right -of -way diversion must drain to a sediment trapping measure.
6. Show soil types on plan.
7. Provide stock pile location and staging /parking area.
8. On north side of site, silt fence should not be shown going downhill.
9. Your adequate channel analysis doesn't look complete. Check channel calculations and CN values.
10. Provide construction entrance detail.
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.
Engineering Review Comments
Page 3 of 3
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
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;
ht!p://www.albemarle.or,-/deptforms.asp?department=cdenawpo
File: E1_vsmp_review_projectname.doc