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Home My WebLink AboutSW3201001_SuppEZ-2018-Version-2.1.1_20201202 SUPPLEMENT-EZ COVER PAGE FORMSLOADED PROJECT INFORMATION Project Name Dollar General - Granite Quarry (Store #22446) 1 2Project Area (ac)2.17 3Coastal Wetland Area (ac)0 4Surface Water Area (ac)0 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)N/A 8Will the vegetated setback remain vegetated?Yes 9Is BUA other that as listed in .1003(4)(c-d) out of the setback?Yes Is streambank stabilization proposed on this project?No 10 NUMBER AND TYPE OF SCMs: 11Infiltration System0 12Bioretention Cell0 13Wet Pond0 14Stormwater Wetland0 15Permeable Pavement0 16Sand Filter1 17Rainwater Harvesting (RWH)0 18Green Roof0 19Level Spreader-Filter Strip (LS-FS)0 20Disconnected Impervious Surface (DIS)0 21Treatment Swale0 22Dry Pond0 23StormFilter0 24Silva Cell0 25Bayfilter0 Filterra0 26 FORMSLOADED DESIGNER CERTIFICATION 27Name and Title:Justin Church, PE / Principal Engineer 28Organization:BREC, P.A. 29Street address:1520 Meadowview Drive 30City, State, Zip:Wilkesboro, NC 28697 31Phone number(s):336.844.4088 Email:justin@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 09/29/2020 ______________________________________________ Date Seal DRAINAGE AREAS 1Is this a high density project?Yes ge areas/SCMs1 2 If so, number of draina Is all/part of this project subject to previous rule 3versions?No FORMSLOADED Entire Site1 DRAINAGE AREA INFORMATION 4T ype of SCM N/ASand Filter 5Total BUA in project (sq ft)53464 sf53464 sf New BUA on subdivided lots (subject to 6permitting)(sq ft)N/AN/A New BUA outside of subdivided lots (subject to 7permitting) (sf)29211 sf29211 sf (sq ft)43875 sf43875 sf 8Offsite - total area 9Offsite BUA (sq ft)24253 sf24253 sf 10Breakdown of new BUA outside subdivided lots: - Parking (sq ft)18026 sf18026 sf - Sidewalk (sq ft)1976 sf1976 sf - Roof (sq ft)9209 sf9209 sf - Roadway (sq ft) sf sf - Future (sq ft) sf sf - Other, please specify in the comment box below (sq ft) sf sf New infiltrating permeable pavement on 11subdivided lots (sq ft) sf sf New infiltrating permeable pavement outside of 12subdivided lots (sq ft) sf sf Exisitng BUA that will remain (not subject to 13permitting) (sq ft) sf sf 14Existing BUA that is already permitted (sq ft) sf sf 15Existing BUA that will be removed (sq ft) sf sf 16Percent BUA57%57% 17Design storm (inches)N/A1 in 18Design volume of SCM (cu ft)N/A4404 cf Calculation method for design volumeN/ASimple 19 ADDITIONAL INFORMATION Please use this space to provide any additional information about the 20drainage area(s): Entire Site1 DRAINAGE AREA INFORMATION 4Type of SCMN/A Total BUA from project (sq ft) 5 6 1995 rules SL 2006-246 2008 rules 2017 rules New BUA on subdivided lots (subject to permitting) (sq ft) 7 1995 rules SL 2006-246 2008 rules 2017 rules New BUA outside of subdivided lots (subject to permitting) (sf) 8 1995 rules SL 2006-246 2008 rules 2017 rules Offsite - total area (sq ft) 9 1995 rules SL 2006-246 2008 rules 2017 rules Offsite BUA (sq ft) 10 1995 rules SL 2006-246 2008 rules 2017 rules Design storm (inches) 11 1995 rules SL 2006-246 2008 rules 2017 rules Breakdown of new BUA: 12 - Parking (sq ft) - Sidewalk (sq ft) - Roof (sq ft) - Roadway (sq ft) - Future (sq ft) - Other, please specify in the comment box below (sq ft) New infiltrating permeable pavement on 13subdivided lots (sq ft) New infiltrating permeable pavement outside of 14subdivided lots (sq ft) Exisitng BUA that will remain (not subject to 15permitting) (sq ft) 16Existing BUA that is already permitted (sq ft) 17Existing BUA that will be removed (sq ft) 18Percent BUA gn volume of SCM (cu ft) 19Desi Calculation method for design volume 20 ADDITIONAL INFORMATION Please use this space to provide any additional information about the drainage area(s): 21 SAND FILTER Drainage area number1 1 Design volume of SCM (cu ft)4404 sf 2 GENERALMDCFROM02H.1050 Is the SCM sized to treat the SW from all surfaces at build-out?Yes 3 Is the SCM located away from contaminated soils?Yes 4 What are the side slopes of the SCM (H:V)?3:1 5 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 6 Are the inlets, outlets, and receiving stream protected from erosion (10- year storm)?Yes 7 Is there an overflow or bypass for inflow volume in excess of the design volume?Yes 8 What is the method for dewatering the SCM for maintenance?Pump (preferred) 9 If applicable, will the SCM be cleaned out after construction?Yes 10 Does the maintenance access comply with General MDC (8)?Yes 11 Does the drainage easement comply with General MDC (9)?Yes 12 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? 13 Is there an O&M Agreement that complies with General MDC (11)?Yes 14 Is there an O&M Plan that complies with General MDC (12)?Yes 15 Does the SCM follow the device specific MDC?Yes 16 Was the SCM designed by an NC licensed professional?Yes 17 SAND FILTER MDC FROM 02H .1056 SHWT elevation (fmsl)769 18 Type of sand filter (open or closed)Open 19 If closed, will the filter will be pre-cast or pour-in-place? 20 If closed, top of grate elevation (fmsl) 21 Is this sand filter designed to attenuate peak flows? No 22 {ĻķźƒĻƓƷ/ŷğƒĬĻƩ 1966 cf Volume that can be retained in the sediment chamber (cubic feet) 23 Will there be a permanent pool in the sediment chamber?Yes 24 773.00 Bottom of the sediment chamber (fmsl) 25 1258 sf Area of the sediment chamber (square feet) 26 28.0 in Physical depth of the sediment chamber (inches) 27 Ponding depth in the sediment chamber, above any permanent pool (inches)16.0 in 28 Elevation of top of weir between chambers (fmsl)775.3 29 {ğƓķ/ŷğƒĬĻƩ 1765 cf Volume that can be retained in the sand chamber (cubic feet) 30 774.00 Bottom of the sand chamber (fmsl) 31 1129 sf Area of the sand chamber (square feet) 32 16.0 in Physical depth of the sand chamber (inches) 33 Ponding depth in the sand chamber, above any permanent pool (inches)16.0 in 34 Elevation of the bypass device (fmsl)775.3 35 Type of bypass deviceOrifice 36 Mechanism for distributing flow over the sand surfacestone dam 37 Sand specification for sand chamberastm c33 38 Depth above underdrain pipe (inches)18 in 39 Will the media be maintained to drain at least two inches per hour at the sand surface?Yes 40 Is at least one clean-out pipe provided at the low point of each underdrain line?Yes 41 Will clean-out pipes be capped? Yes 42 ADDITIONAL INFORMATION Please use this space to provide any additional information about the Sand Filter(s): 43 SandFilter411:46AM9/29/2020