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Home My WebLink AboutWPO201400074 Review Comments WPO VSMP 2014-10-23� OF AL ,. vIRGI1`IZP COUNTY 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: Riverside Village Project file number: WP0201400074 Plan preparer: Shimp Engineering [Justin @chimp- engineering.com] Owner or rep.: RIVERSIDE VILLAGE PROPERTIES INC Plan received date: 1 October 2014 Date of comments: 22 October 2014 Reviewers: Max Greene, Glenn Brooks 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. No additional fee is required for resubmittal. The VSMP application content requirements can be found in County Code section 17 -401. A complete VSMP SWPPP package was not found. A pollution prevention plan was not found. Comments regarding the stormwater management plan for Riverside are as follows; Rev. 1: Future submission will not be reviewed without a complete VSMP package. This project should have an active SWPPP for on -going grading activities, and this would be amended with this new set of plans and documents. This plan assumes the use of type IIC technical criteria, which has not been established. Provide evidence of state coverage per 9VAC25- 870 -47. This plan is not applicable for grandfathering under 9VAC25- 870 -48 as the zma was approved after July 2012. The rest of these comments assume you can establish grandfathering. If that is not the case, no comments are applicable, and the plan must be redesigned under the IIB criteria. Rev. 1: not addressed. Please provide a copy of the DEQ Coverage Letter with the expiration date of June 30, 2019. Please submit a copy as soon as possible. Future submission will not be reviewed without this item. 2. Infiltration systems cannot be approved without passing soil tests being performed prior to plan approval. Please provide tests verifying soil infiltration rates, and sufficiently low groundwater tables, and evidence that these areas of ground have not been disturbed with current ongoing grading activities. Rev. 1: Addressed. 3. There is not enough detail on the plans for a complete review. All BMP's need to have details, profiles and sections drawn to scale, showing existing and final grades, layout, access, and control structures. Rev. 1: Not addressed. There was no profile or details for detention chamber A4A. The biofilters do not have profiles or details to scale, only a typical section. The sections for system D are not Engineering Review Comments Page 2 of 4 located on the plan view and do not contain grades. Design details and a marked plan were provided in the meeting of 22 Oct 2013. 4. Infiltration systems cannot be approved in fill areas. Rev. 1: not fully addressed. See #3. 5. Each BMP must have a properly sized forebay area that can be accessed for regular maintenance. Rev.I not addressed. Sizing for forebays in biofilters was not found. It is not clear how drainage gets to biofilter C. The forebay pipe in system D appears to show fabric inside the pipe, which does not seem possible, and not all inlets are captured. Please provide these details. 6. Please provide design computations for water quality sizing of facilities. None were found. Rev. 1: See item #1. 7. A sump must be provided at inlets 132 -133 for capture of the 10year storm. Similar assurances should be provided for each facility. Rev. 1: not addressed. I found nothing on the plan for inlet 132 -133. Note the sump or provide the profile. 8. The drainage system must capture the 10year storm for the stormwater management concept to function. The inlet computations do not demonstrate this. Rev. 1: Not addressed. These comps and specs were not included in the WPO drawings. 9. A CLOMR is recommended. You proceed at your own risk with filling before FEMA approval. Normally, this is a condition of the Special Use Permit. I'm not sure why this was left out of the staff report with this development. I will hold off approving any final plats for lots in the fill areas until FEMA approval is obtained. A. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17 -404. 1. Please provide a copy of the DEQ Coverage Letter with the expiration date of June 30, 2019. Please submit a copy as soon as possible. B. 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. See County Engineer comments above. C. 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. 1. The paved temporary construction entrance detail is required on the VSMP plan. (policy) The contractor and Inspector will work out the details as to what entrance will be utilized on site. 2. Stormwater pipe profiles were not included for E &SC review. Please show outlet protection per Engineering Review Comments Page 3 of 4 VESCH 3.18 on the stormwater pipe profiles. 3. Pipe extension for VDOT 60" culvert appears to empty into a pool. Please show better details for construction and review for VESCH requirements on outlet protections. 4. Narrative states "see page C2 for existing features. Which sheet is C2? 5. Several references to pages with a prefix "C" are on plan sheets but no "C" plans are supplied. 6. Could not find benchmark location and datum on plan, please clarify. 7. Previously approved grading plan is County # WPO201400021. Please add this to reference note so inspector /public can easily locate the plan in the County system. 8. Outlet protection or temporary slope drain should be shown for pipe into basin so slope is not eroded during construction. 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 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; http://www.albemarle.org/deptforms.asp?department=cden.gwpo Engineering Review Comments Page 4 of 4 File: E1_vsmp_review_projectname.doc