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Home My WebLink AboutSW1240701_Supplement-EZ Form_20240913 SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name _ New Sheetz Store-Asheville Airport 2 Project Area(ac) _ 11.49 3 Coastal Wetland Area(ac) _ 0 4 Surface Water Area(ac) 0 5_ Is this project High or Low Density? _ High 6 Does this project use an off-site SCM? No COMPLIANCE WITH 02H.1003(4) 7 Width of vegetated setbacks provided(feet) 20 8 Will the vegetated setback remain vegetated? Yes 9 If BUA is proposed in the setback,does it meet NCAC 02H.1003(4)(c-d)? N/A 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 12 Bioretention Cell 13 Wet Pond _ 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 17 Rainwater Harvesting(RWH) _ 18 Green Roof 19 Level Spreader-Filter Strip(LS-FS) 20 Disconnected Impervious Surface(DIS) 21 Treatment Swale _ 22 ,Dry Pond - _ . 23 StormFilter _ 24 Silva Cell 25 Bayfilter _ - 1 26 Filterra FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: _ Ryan Gatewood,President 28 Organization: LE&D Professionals,PC 29 Street address: _ 110 Exchange Street,Suite B 30 City,State,Zip: _ Danville VA 24541 31 Phone number(s): 434-792-3680 32 Email: _ _ _ ratewood@landeng.com 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 ``��1111111►10�``•‘‘ ,(H CAIQO��i ESS%� 40 0i ? 'oF ; y . SEAL < gnat esigner 7 r 1V • 731. 043527 o ,, ��C IqM....... 7/Q/?L7 f///t L11‘�, Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so,number of drainage areas/SCMs 3-Jan 3 Does this project have low density areas? No 4 If so,number of low density drainage areas 0 j Is all/part of this project subject to previous rule 5 versions? No CLICK TO LOAD FORM DRAINAGE AREA INFORMATION Entire Site 1 2 3 4 Proprietary Device 4 Type of SCM (ADS Bayfilter) N/A N/A 5 Total drainage area(sq ft) 466528 234353 220414 11761 6 Onsite drainage area(sq ft) 408594 189051 207782 11761 7 Offsite drainage area(sq ft) 57934 45302 12632 0 8 Total BUA in inject(sq ft) 272250 sf 150282 sf 121968 sf sf New BUA on subdivided lots(subject to permitting) 9 (sg ft) 272250 sf 150282 sf 121968 sf sf New BUA not on subdivided lots(subject to 10 permitting)(sf) sf sf sf sf 11 Offsite BUA(sq ft) 21780 sf 10890 sf 10890 sf sf 12 Breakdown of new BUA not on subdivided lots: 0 -Parking(sq ft) 202660 sf 113850 sf 88810 sf sf Sidewalk(sq ft) 4087 sf sf 4087 sf sf -Roof(sq ft) 14956 sf sf 14956 sf sf -Roadway(sq ft) 3225 sf sf 3225 sf sf -Future(sq it), 25542 sf 25542 sf sf sf -Other,please specify in the comment box below(sq ft) _ sf _ New infiltrating permeable pavement on 13 subdivided lots(sq ft) _ sf sf sf sf New infiltrating permeable pavement not on 14 subdivided lots(sq ft) sf sf sf sf Existing BUA that will remain(not subject to 15 permitting)(sq ft) _ 29360 sf sf 29360 sf sf 16 Existing BUA that is already permitted(sq ft) sf sf sf sf 17 Existing BUA that will be removed(sq ft) _ sf sf sf sf 18 Percent BUA 54% 64% 55% 0% 19 Design storm(inches) 1.3 in 1.3 in 1.3 in 1.3 in 20 Design volume of SCM(Cu ft) 49798 cf 49798 cf NC Design Volume i NC Design Volume 21 Calculation method for design volume Calculation Calculation ADDITIONAL INFORMATION elel ase use this space to provide any additional information about the 22 drainage area(s): BAYFILTER 1 Drainage area number 1 2 Minimum required treatment volume(cu ft) 9966 cf pENERAL MDC FROM 02H.1050 31 Is the SCM sized to treat the SW from all surfaces at build-out? Yes 4lIs the SCM located away from contaminated soils? Yes 5!What are the side slopes of the SCM(H:V)? N/A 6 Does the SCM have retaining walls,gabion walls or other engineered N/A side slopes? Are the inlets,outlets,and receiving stream protected from erosion 7 (10-year storm)? Yes 8 Is there an overflow or bypass for inflow volume in excess of the Yes design volume? 9 What is the method for dewatering the SCM for maintenance? Pump(preferred) 10 If applicable,will the SCM be cleaned out after construction? N/A 11 Does the maintenance access comply with General MDC(8)? Yes 12 Does the drainage easement comply with General MDC(9)? Yes 13 If the SCM is on a single family lot,does(will?)the plat comply with No General MDC(10)? 14 Is there an O&M Agreement that complies with General MDC(11)? Yes 15 Is there an O&M Plan that complies with General MDC(12)? Yes 16 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensed professional? Yes BAYFILTER MDC FROM THE STORMWATER DESIGN MANUAL 18 If Volume Design is used,what is the volume from the drainage area (cubic feet)? 19 Is an upstream detention used? _ Yes 20 Volume of the upslope detention system(cubic feet) 49798 cf 21 Percent of the design volume contained in the upslope detention 100% system(%) 22 If Rate Based Sizing is used,for 1 inch or 1.5 inch(Coastal areas). cfs Water Quality flow rate for drainage area(cfs) 23 Number of cartridges _ _ 8 24 Cartridge height(inches) 22 in No SHWT 25 SHWT elevation(fmsl) observed during testing 26 Elevation of bottom of BayFilter vault(fmsl) 2098.43 _ 27 Clearance from the SHWT(feet) >2' 28 BayFilter Media Flow Rate(GPM/ft2 of Media Surface) 23 gpm/sf 29 Does the system includes a sediment sump? _ Yes 30 If yes,the diameter of the sump(feet) 4 ft 31 If yes,the depth of the sump(feet) 2 ft 32 Time to drain the sump(hours) 48 hrs 33 Time to drain the BayFilter(hours) 26 hrs 34 Is an off-line flow splitting device used? No 35 Type of media used(EMC or GAC-metals) EMC 36 Will maintenance be performed by Certified Maintenance Providers Yes per instructions? ADDITIONAL INFORMATION 37 Please use this space to provide any additional information about the BayFilter system(s):