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Home My WebLink AboutSW4210301_SUPPLEMENTAL_EZ_SIGNED_20210416 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION Project NameAEV Parking Expansion 1 2Project Area (ac)16.999 3Coastal Wetland Area (ac)N/A 4Surface Water Area (ac)2.005 5Is this project High or Low Density?High Does this project use an off-site SCM?No 6 COMPLIANCE WITH 02H .1003(4) 7Width of vegetated setbacks provided (feet)30 8Will the vegetated setback remain vegetated?Yes 9If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c-d)?N/A Is streambank stabilization proposed on this project?No 10 NUMBER AND TYPE OF SCMs: 11Infiltration System 12Bioretention Cell 13Wet Pond 14Stormwater Wetland 15Permeable Pavement 16Sand Filter1 17Rainwater Harvesting (RWH) 18Green Roof 19Level Spreader-Filter Strip (LS-FS) 20Disconnected Impervious Surface (DIS) 21Treatment Swale 22Dry Pond 23StormFilter 24Silva Cell 25Bayfilter Filterra 26 FORMS LOADED DESIGNER CERTIFICATION 27Name and Title:Max Prestwood III, P.E. 28Organization:BREC, PA. 29Street address:1520 Meadowview Drive 30City, State, Zip:Wilkesboro, NC 28697 31Phone number(s):336-844-4088 Email:max@brec.biz 32 Certification Statement: I certify, under penalty of law that this Supplement-EZ form and all supporting information were prepared under my direction or supervision; that the information provided in the form is, to the best of my knowledge and belief, true, accurate, and complete; and that the engineering plans, specifications, operation and maintenance agreements and other supporting information are consistent with the information provided here. Designer ______________________________________________ Signature of Designer 4/16/2021 Date Seal DRAINAGE AREAS 1Is this a high density project?Yes 2 If so, number of drainage areas/SCMs1 3Does this project have low density areas?No 4 If so, number of low density drainage areas0 Is all/part of this project subject to previous rule 5versions?No CLICK TO LOAD FORM SAND FILTER 1 Drainage area number1 2 Minimum required treatment volume (cu ft)5686 sf GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build-out?Yes 4 Is the SCM located away from contaminated soils?Yes 5 What are the side slopes of the SCM (H:V)?3:1 Does the SCM have retaining walls, gabion walls or other engineered 6 No side slopes? Are the inlets, outlets, and receiving stream protected from erosion 7 Yes (10-year storm)? Is there an overflow or bypass for inflow volume in excess of the 8 Yes design volume? 9What is the method for dewatering the SCM for maintenance?Pump (preferred) 10 If applicable, will the SCM be cleaned out after construction?Yes 11Does the maintenance access comply with General MDC (8)?Yes 12 Does the drainage easement comply with General MDC (9)?Yes If the SCM is on a single family lot, does (will?) the plat comply with 13 N/A General MDC (10)? 14 Is there an O&M Agreement that complies with General MDC (11)?Yes 15Is there an O&M Plan that complies with General MDC (12)?Yes 16 Does the SCM follow the device specific MDC?Yes 17Was the SCM designed by an NC licensed professional?Yes SAND FILTER MDC FROM 02H .1056 18 SHWT elevation (fmsl)2983.47 19Type of sand filter (open or closed)Open 20 If closed, will the filter will be pre-cast or pour-in-place? 21If closed, top of grate elevation (fmsl) 22 Is this sand filter designed to attenuate peak flows? Yes {ĻķźƒĻƓƷ /ŷğƒĬĻƩ 232861 cf Volume that can be retained in the sediment chamber (cubic feet) 24Will there be a permanent pool in the sediment chamber?No 25 Bottom of the sediment chamber (fmsl)2988.00 26961 sf Area of the sediment chamber (square feet) 27 Physical depth of the sediment chamber (inches)12 in Ponding depth in the sediment chamber, above any permanent pool 28 N/A (inches) 29 Elevation of top of weir between chambers (fmsl)2990 {ğƓķ /ŷğƒĬĻƩ 30 Volume that can be retained in the sand chamber (cubic feet)2861 cf 312987.50 Bottom of the sand chamber (fmsl) 32 Area of the sand chamber (square feet)729 sf 3318 in Physical depth of the sand chamber (inches) Ponding depth in the sand chamber, above the sand surface 3426 in (inches) 35Elevation of the bypass device (fmsl)2991.2 36 Type of bypass deviceWeir 37Mechanism for distributing flow over the sand surfaceStone Dissipater 38 Sand specification for sand chamberASTM C33 39Depth above underdrain pipe (inches) Will the media be maintained to drain at least two inches per hour at 40 Yes the sand surface? Is at least one clean-out pipe provided at the low point of each 41 Yes underdrain line? 42 Will clean-out pipes be capped? Yes ADDITIONAL INFORMATION Please use this space to provide any additional information about the 43 sand filter(s): Sand Filter110:05 AM 4/16/2021