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Home My WebLink AboutSW4190902_Supplement-EZ Form_20191217VV■ ■ ��■1■V■� ■—`fL V\/V1-1\ ■ r\vim FORMS LOADCD PROJECT INFORMATION 1 Project Name Circle K R&R 2723188 2 Project Area ac 1.26 3 Coastal Wetland Area ac 0 4 Surface Water Area ac 0 5 Is this project High or Low Density? Hi h 6 1 Does this project use an off -site SCM? No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 0 8 Will the vegetated setback remain vegetated? No 9 Is BUA other that as listed in .1 0034. c-d out of the setback? No 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration System 0 12 Bioretention Cell 0 13 Wet Pond 0 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 ISand Filter 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Stri(IS-FS 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Bayfilter 1 26 Filterra 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Rick Baker 28 _ Organization: Timmons Group 29 Street address: 5410 Trini Rd Ste 102 30 Ci , State, Zip: Phone numbers : Email: Raleigh NC 27607 31 919-866-4939 32 hck.baker@timmons.com Cemlfl cation ySWtoment 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. .,j11411f1111////. CA R p�I•,,,! SEAL 022530 ANC! N _,Soft ///Il1 ;11%1111 C� 105 Signature of Designer Date DRAINAGE AREAS 1 Is this a high density pro ect? Yes 2 If so number of draina a areas/SCMs 1 Is all/part of this project subject to previous rule 3 versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM Bayfliter 5 Total BUA in project (sq ft 38302 sf 9320 sf 6permitting) New BUA on subdivided lots (subject to s ft 7 New BUA outside of subdivided lots (subject to permitting) s 3547 sf 5194 sf 8 1 Offsite - total area (sq ft 9 Offsite BUA (sq ft 10 Breakdown of new BUA outside subdivided lots: 3547 sf 5194 sf Parkinq (sQ ft Sidewalk (sq ft Roof (sg ft 2647 sf 4294 sf Roadway s ft Futures ft 900 sf 900 sf Other, please specify in the comment box below (sq ft 11 New infiltrating permeable pavement on subdivided lots (sq ft New infiltrating permeable pavement outside of subdivided lots (sq ft Exisitng BUA that will remain (not subject to ermitting) (sq ft 12 13 34755 sf 4126 sf 14 _ Existing BUA that is already permitted (scl ft 15 Existing BUA that will be removed (sq ft 16 Percent BUA 70% 90% 17 Design storm inches 1 in 18 lDesigIn volume of SCM cu ft 557 cf 19 lCalculation method for desi n volume Simple ADDITIONAL INFORMATION _ — _- 20 ldrainage Please use this space to provide any additional information about the areas :" BAYFILTER 1 1 Drainage area number 1 2 Dasign volume (cu ft) or peak treatment rate (cfs) of SCM F 557 cf NE MIDC FROM Q4AM 3 is the SCM sized to treat the SW from all surfaces at bulld- out? I Yes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V)? 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? No 7 Yes B Is there an overflow or bypass for inflow volume in excess of the design volume? Yes 9 What is the method for dewatering the SCM for maintenance? If applicable, will the SCM be cleaned out after construction? Does the maintenance access comply with General MDC (B)? Pump .(preferred) 10 Yes 11 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)? Is there an O&M Agreement that complies with General MDC (11)? Is there an O&M Plan that complies with General MDC (12)? 14 Yes 15 Yes 16 Does the SCM follow the device specific MDC? Yes the SCM designed by an NC licensed professional? Yes MDC FROM THE STORMWATER DESIGN MANUAL 17 lWas BAYFILTER 18 If Volume Design is used, what is the volume from the drainage area (cubic feet)? 557 cf 19 Is an upstream detention used? Yes 20 Volume of the upslope detenIon system (cubic feet) 5.70 cf 21 Percent of the design volume contained in the upslope detention system (%) 100% 22 If Rate Based Sizing is used, for 1 inch or 1.5 inch (Coastal areas). Water Quality flow rate for drainage area (cfs) 1 22 in _ < 953 23 Number of Cartridges 24 Cartridge height (inches) 25 SHWT elevation (fmsl) 26 Elevation. bf bottom of BayFifter vault (fmol) 955 27 Clearance from the SHWT (feet) _ > 2 28 BayFilter Media Flow Rate (GPM/ft2 of Media Surface) .50 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) 33 rime to drain the BayFilter (hours) 29 hrs 34 Is an off-line flow splitting device used? Yes 35 Type of media used (EMC or GAC-metals) EMC 36 Will maintenance be performed y Certified Maintenance providers per instructions? Yes ADDITIONAL INFORMATION 37 Please use this space to provide any additional information about the BayFilter system(s):