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HomeMy WebLinkAboutWPO201400096 Review Comments WPO VSMP 2015-01-06�pF A vt�r�1Q 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: Stonefield Block D2 - VSMP Plan preparer: WW Associates Owner or rep.: Albemarle Place EAAP, LLC Plan received date: 16 Dec 2014 Date of comments: 6 Jan 2015 Reviewer: 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 submitted 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. WPO (WP02014000096) 1) On page 24 the safety fence and silt fence have switched. It appears to be an error on linetypes. See near primary construction entrance. 2) Scale is wrong for sheet 24. 3) Please clarify phasing either by stating in sequence of construction or on plan. It is not clear when SB -I will be removed. Place a note that states lots 46 -57 can be be built after the basin is removed. 4) The diversion dikes are also located where townhomes will be constructed. This will not work if lots will be graded to subgrade elevations. Show a sediment trap near the primary construction entrance. Provide a note stating lots 62 -65 can be built after ST has been removed. 5) I recommend making the secondary entrance the only construction entrance to make the previous comment work. 6) The RWD should be perpendicular to the road and not as an angle as shown. 7) Revise the PPP with the most updated and approved E &S. You can submit when plans are ready to be approved. 8) The placement of geogrid for the retaining wall will encroach on the neighboring property. Please address easements. Engineering Review Comments Page 2 of 3 9) Please follow VDOT road standards with a crown. This will change the location of inlets. Please note road plans will require approval prior to subdivision of lots. 10) Runoff from townhomes should be captured, as much as possible, with inlets within the roadway rather than with roof drains. Please revise in conjunction with comment 9. 11) The retaining walls should be designed to meet 30.7.5 if the walls were not approved on the ZMA plans. a) Retaining walls over 6' should be broken into stepped walls. The separation between walls is Yand shall be landscaped with screening shrubs planted on ten (10) foot centers. b) Address 30.7.5 9(b)(3)(ii). As noted in comment 8, it appears the abutting parcels will be impacted when constructing the retaining wall. Please note there appears to be a staircase to lot 2L. Also, there are accessory structures near the boundary line of lot 6R or 6L. C) Address 30.7.5 9(c)(2), Width and location of benches. The reverse slope shall be approximately 17% or flatter. The bench gradient to the outlet shall be between two (2) percent) and three (3) percent. 12) Show drainage easements for pipes connecting yard inlets to stormsewer system. 13) For the lots near the retaining wall, the 10' -15' backyards show swales that divert runoff to yard inlets. These swales need to function as swales long after construction. Issues arise when homeowners decide to fence off property or build patios. With these assumptions, please incorporate a stormsewer design that anticipates the assumption noted. Typically, inlets are shown for every 3 lots. Also, show drainage easements through the yards. 14) It will also be difficult to ensure positive drainage be to inlets in the backyards near the retaining wall. Please field verify topo in this area and change grading if necessary. I recommend placing spot elevations. 15) Lots 22 -29 have runoff from the adjacent property. Yard inlets are shown to capture runoff, but inlets are prone to clogging. It appears overland relief is attempted between lots 26 -27, which is a benefit. Please show more of a depression to YD -20 by creating a berm between lots 26 and 27. You may need to increase inlet size to ensure maximum capture and avoid a micropool in a backyard. Show ponding depth. Show another inlet at the bottom of hill to connect YD -20 to inlet at road. 16) YD -21 has a 520 contour that creates a depression for the inlet; however, it does not appear that YD -21 will capture much. It will most likely be picked up by YD -20. Please change contour 520 to show positive drainage to YD -20. Show only one depression towards YD -20. I recommend moving these inlets closer to YD -20 depression. 17) It appears there is a general permit coverage letter for 26.3 acres. This covers blocks F, G & D. Please note, the SWPP package was submitted under blocks G and will be stored with application WPO201400102. 18) Please note the SWPP on site should have all the approved PPPs for Blocks F, G & D. Engineering Review Comments Page 3 of 3 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 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/deptforins.asp?department--cdeng)Lypo Sincerely, r"de- Michelle Roberge C. Sources of Pollutants, continued. Common activities and minimum control and prevention practices Pollutant, or Pollutant Prevention Practices, Control Generating Activity Location on site Measures Follow Erosion and Sediment Control Clearing, grading, excavating, and un- Land disturbance area Plan. Dispose of clearing debris at stabilized areas acceptable disposal sites. Seed and mulch, or sod within 7 days of land clearing Cover storm drain inlets and use drip pans Paving operations Roads and driveways and absorbent/oil dry for all paving machines to limit leaks and spills Direct concrete wash water into a leak - Concrete washout and Current location and detail shown on proof container or leak -proof settling basin cement waste plan that is designed so that no overflows can occur Enclose or cover material storage areas. Mix paint indoors in a containment area or Structure construction, stucco, Structures in a flat unpaved area. Prevent the painting, and cleaning discharge of soaps, solvents, detergents and wash water, paint, form release oils and curing compounds. Water shall be filtered, settled or similarly Dewatering operations Dewatering sites shown on plan treated prior to discharge as shown on plan. Designated areas for material delivery and Material delivery and storage Designated area shown on plan storage. Placed near construction entrances, away from waterways and drainage paths Pollutant, or Pollutant Location on site Prevention Practices, Control Generating Activity Measures Building areas Follow manufacturer's instructions . Material use during building process MSDS's attached. waste collection area will not receive a substantial amount of runoff from upland areas and does not drain directly to a Current designated container areas on waterway. Containers have lids covered Solid waste disposal plan before periods of rain, or are in a covered area. Scheduled collection to prevent overfilling. MATERIALS NOT TO BE BURIED ON -SITE Convenient and well- maintained portable sanitary facilities will be provided, and Sanitary waste Current locations shown on plan located away from waterways or inlets. Such facilities shall be regularly maintained. Apply fertilizers in accordance with Landscaping operations Landscape areas shown on plan manufacturer's recommendations and not during rainfall events To be treated in a sediment basin or better control as specified on plan. Minimize Wash Waters Wash areas shown on plan the discharge of pollutants from equipment and vehicle washing Vehicle and equipment washing Designated areas and details shown on Provide containment and filtering for all plan wash waters per the plan Minimization of exposure to precipitation and stormwater. Minimize the exposure of building materials, building products, construction wastes, trash, landscape materials, fertilizers, pesticides, herbicides, detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater. (Identify all non - stormwater discharges to occur on your site. Keep this plan up -to -date with ongoing site changes and inspections. See CGP, 9VAC25- 880 -70 section E for examples of non - stormwater discharges.) A Non - stormwater disc har es Pollutants or Pollutant Constituents Location on Site Discharge Discharge Pollutants or Pollutant Constituents Location on Site E. Persons responsible for pollution prevention practices (Provide the names and contact information for all persons responsible for prevention practices as listed above.) F. Response and reporting practices Minimize discharges from spills and leaks. Minimize the discharge of pollutants from spills and leaks and implement chemical spill and leak prevention and response procedures as follows. Respond to all spills, leaks and discharges as follows; Report all spills, leaks and discharges as follows; (Provide detailed response and reporting practices according to 9VAC25- 880 -70, Part II, section A.4.e.) G. Pollution Prevention Awareness (Describe training and procedures to provide awareness and compliance for all measures in this document; waste management, wash waters, prevention measures, etc.)