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Home My WebLink AboutWPO201400068 Review Comments WPO VSMP 2014-10-07� OF AL ,. vIRGINIP 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 Farmington Country Club South Side Improvements WP0201400068 W &W Assoc. [email] Joseph Krenn, COO General Manager Ukrenn @fccva.com] 25 August 2014 7 October 2014 Max Greene, Michelle Roberge 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. 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 provide a copy of the DEQ Coverage Letter with the expiration date of June 30, 2019. 2. The plan must demonstrate compliance with quality and quantity requirements using the Runoff Reduction Method. Please use the VRRM spread sheet from VDEQ. A. Pollution Prevention Plan (PPP) The PPP content requirements can be found in County Code section 17 -404. 1. A PPP was not found. Please submit a Pollution Prevention Plan (PPP) for review. Requirements can be found in County Code 17 -404. 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. WPO (WP02014000068) 1) Show soil map of site. 2) The drainage area A table on sheet C -13 shows a BMP practice to a rain garden #2. The plan does not show a rain garden. Please clarify if you are proposing a rain garden. Engineering Review Comments Page 2 of 3 3) The sloped area south of the proposed parking lot all drain to the biofilter, but only .5 acres is shown going to the bioretention practice. It appears more than .5 acres will drain to biofilter. Please revise. 4) Add this note on C -12 for biofilter mix. "Tested for acceptable phosphorus index between 10 and 30 or between 7 and 23 mg/kg of P in soil media." 5) Submit perc rate for biofilter area. (One per 1,000 sq ft of filter surface). Also, verify that the bottom of #57 aggregate is 2' above seasonably high water table. 6) Label underdrain with Schedule 40 PVC with cleanouts. Show 12" depth for #57 aggregate. 7) The geometry of basin does not meet spec of bioretention design criteria. Short circuiting should be prevented. Please revise. 8) Show the 2' gravel diaphragm level spreader at pretreatment area. On profile view, show the lip on level spreader. 9) I recommend moving the curb cut location away from the corner of parking lot and shifting layout of gravel spreader to enter far east side of biofilter. 10) Two rip rap strips are shown on plan, but only one profile view is shown. Please show both since one is from sidewalk and the other from the culvert under the golf cart path. My concern is that #57 stones will wash away at steeper slopes. The detail shown is for sheet flows off pavement, then into a pretreatment area that is flat. Please clarify design since the detail has been modified. 11) The water quantity analysis for channel protection should show the actual drainage area to the point of analysis, such as drainage area A, B, C and existing areas. The CN should be different to drainage area D. The spreadsheet shows how much phosphorus to remove, but channel analysis cannot be determined by the separate disturbed drainage areas alone since the CN is not correct. 12) Please clarify the total drainage area to pond. It appears to be larger than what is shown. 13) Clarify the surface elevation of the bioretention area. The profile shows 607, but the plan view shows 606. 14) Relabel bioretention facility #2 under the Bioretention Facility sizing calculations. It should be bioretention facility #1. 15) Submit a Pollution Prevention Plan and a Stormwater Pollution Prevention Plan. Sincerely, MQJ/T- Michelle Roberge 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. Sediment trap outlet needs to be extended to the bottom of the slope /disturbed soil area to prevent Engineering Review Comments Page 3 of 3 additional sediment loss during trap overflows. Paved construction entrance detail needs to be on the plan. The Albemarle County Temporary Paved Construction Entrance detail can be found in the County Design Standards Manual. Please remove the bio- filter components from the E &SC plan sheets. Bio- filter components should be shown on the SWM pages. 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.orWdeptforms.asp ?department= cdengwpo File: E1_vsmp_review_projectname.doc