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Home My WebLink AboutSW4210302_Supplement EZ_20210621SUPPLEMENT-EZ COVER PAGE FORMS LOADED :OJECT INFORMATI N 1 Project Name 2 Project Area ac 3 Coastal Wetland Area ASU Poplar Grove Child Development Center 3.9 4 1 Surface Water Area ac 0.117 wetlands 5 Is this project High or Low Density? High 6 Does this project use an off -site SCM? No COMPL E WITH 02H .1003(4) 7 Width of vegetated setbacks provided (feet) 30 8 Will the vegetated setback remain vegetated? Yes 9 Is BUA other that as listed in .1003 4 c-d out of the setback? Yes 10 Is streambank stabilization proposed on this project? No BER AND TYPE 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 0 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-FS 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Ba filter 1 26 Filterra 0 FORMS LOADED SIGNER CERTIFICATION 27 Name and Title: Michael Cain, PE 28 Organization: Civil Design Concepts 29 Street address: 168 Patton Avenue 30 City, State, Zip: Asheville, NC 28801 31 Phone numbers : 828-252-5388 32 Email: mcain@cdcdgo.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. O� 0 E AOOl2 =o°QO �9° SEAL 1.= 047788 o �Oo �N01 NE�-�°°�� tiq EMI J\\G Signatur of Design Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION ite 1 4 Type of SCM r 5 Total BUA in project (sq ft) r467718f 6 New BUA on subdivided lots (subject to permitting) (sq ft 7 New BUA outside of subdivided lots (subject to permitting) (so 8146 sf 8 Offsite - total area (sq ft) sf 9 Offsite BUA (sq ft sf 10 Breakdown of new BUA outside subdivided lots: Parkin (sq ft 1620 sf Sidewalk (sq ft 242 sf Roof (sq ft 5324 sf Roadway s ft 960 sf Future (sq ft Other, please specify in the comment box below (sq ft 8146 sf 11 New infiltrating permeable pavement on subdivided lots (sq ft sf 12 New infiltrating permeable pavement outside of Isubdivided lots (sq ft sf 13permitting) Exisitng BUA that will remain (not subject to s ft 38572 sf 14 Existing BUA that is already permitted (sq ft 38572 sf 15 Existing BUA that will be removed (sq ft sf 16 Percent BUA 28% 17 Design storm inches 1 in 18 Design volume of SCM cu ft NA 19 1 Calculation method for design volume NA ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage area(s): One drainage area consisting of the impervious portion of the developed site will drain to a Bayfilter system DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM NA 5 Total BUA from project (sq ft) 6 1995 rules SL 2006-246 2008 rules 2017 rules 7 New BUA on subdivided lots (subject to permitting) (sq ft) 1995 rules SL 2006-246 2008 rules 2017 rules 8 New BUA outside of subdivided lots (subject to permitting) (sf) 1995 rules SL 2006-246 2008 rules 2017 rules 9 Offsite - total area (sq ft) 1995 rules SL 2006-246 2008 rules 2017 rules 10 Offsite BUA (sq ft) 1995 rules SL 2006-246 2008 rules 2017 rules 11 Design storm (inches) 1995 rules SL 2006-246 2008 rules 2017 rules 12 Breakdown of new BUA: 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 13 New infiltrating permeable pavement on Isubdivided lots (sq ft 14 New infiltrating permeable pavement outside of subdivided lots (sq ft 15 Exisitng BUA that will remain (not subject to permitting) (sq ft) 16 Existing BUA that is already permitted (sq ft 17 Existing BUA that will be removed (sq ft) 18 Percent BUA 19 Design volume of SCM (cu ft) 20 Calculation method for design volume ADDITIOWAL INFORKMtION 21 Please use this space to provide any additional information about the drainage area(s): BAYFILTER 1 Drainage area number 1 2 1 Design volume (cu ft) or peak treatment rate (cfs) of SCM 0.43 cfs 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)? NA 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes Is there an overflow or bypass for inflow volume in excess of the design volume? Yes What is the method for dewatering the SCM for maintenance? Other 8 9 10 If applicable, will the SCM be cleaned out after construction? Yes 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 General MDC (10)? Yes 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 Yes 16 Does the SCM follow the device specific MDC? 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)? NA 19 Is an upstream detention used? No 20 Volume of the upslope detenion system (cubic feet) NA 21 Percent of the design volume contained in the upslope detention system (%) NA 22 If Rate Based Sizing is used, for 1 inch or 1.5 inch (Coastal areas). Water Quality flow rate for drainage area (cfs) 0.43 cfs 23 Number of cartridges 4 24 Cartridge height (inches) 36 in 25 SHWT elevation (fmsl) NA 26 Elevation of bottom of BayFilter vault (fmsl) 3308.65 27 Clearance from the SHWT (feet) NA 28 BayFilter Media Flow Rate (GPM/ft2 of Media Surface) gpm/sf 29 Does the system includes a sediment sump? No 30 If yes, the diameter of the sump (feet) NA 31 If yes, the depth of the sump (feet) NA 32 Time to drain the sump (hours) NA 33 Time to drain the BayFilter (hours) NA 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 per instructions? Yes ADDITIONAL INFORMATION 37 Please use this space to provide any additional information about the BayFilter system(s):