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Home My WebLink AboutSW6220802_Supplement-EZ Form_20230217 (2)SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION ! 1 Project Name Champs Convenience Store 2 Project Area (ac) 3.46 3 Coastal Wetland Area (ac) 0 5 is this project High or Low Density? 6 Does this project use an off -site SCM? No _ - iCMPLl OANCE WITH 02H 1003(4) hp& 7 Width of vegetated setbacks provided {feet) _ 50 8 Will the vegetated setback remain vegetated? _ __._ _ Yes T 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003(4)(c d)? — _____ NIA 10 Is sireambank stabilization proposed on this project? —_ No NUMBER AND TYPE OF SCMs 11 Infiltrations stem 12 Bioretention Cell 13 Wet Pond-- 14 Stormwater Wetland 15 Permeable Pavement.__�--- 16 Sand Filter 17 Rainwater Harvesting (RWH)ry 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 -- ----_ 26 Fllterra FORMS LOADED fGNER CERTIFICATfON Name and Title: address: Email: Johnny Glenn Tew / Project Engineer ECLS Global Inc. N.C. Certification Statement: I certify, under penalty of law that this Supplement EZ form and all supporting information were prepared under my direction or supervision; thatthe 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. ME ESS/OM .�°��i s a� 80 `'off;•. �'N�+rr�E� : � `��; Sign a a of Desf der Date DRAINAGE AREAS 1 Is this a hi h density project? Yes ! 2 If so, number of drainage areaslSCMs 1 3 Does this project have low density areas? No 4 if so, number of low density drainage areas 0 jL is alllpart of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 j 4 Type of SCM _ Infiltration !j 5 Total drainage area (sq ft i_ 87,120.00 6 _- Onsite drainage area (sq ft _155,509,20 150,717.60 82,328.40 { 7 Offsite drainage area {sq ft) 4,791.60 4791.6 -_ 8 9 Total BUA in project s ft New BUA on subdivided lots (subject to permitting) (sq ft) $3200 sf NA — _ J. 72310 sf NI NA 10 New BUA not on subdivided lots (subject to permitting) s 78408 sf 67518 sf 11 Offsite BUA s ft 4792 sf 4792 sf 12 Breakdown of new BUA not on subdivided lots: 'i Parkin sq ft 8086 sf 8086 sf Sidewalk (sg ft 10271 sf 4608 sf - Roof (sq ft), 6600 sf 6600 sf - Roadway (sq ft) 52819 sf 47592 sf - Future (sq6 NA NA _ Other, please specify in the comment box below- sq ft) 5424 sf 5424 sf 13 New infiltrating permeable pavement on � subdivided lots (sq ft u NA NA j! 14 New infiltrating permeable pavement not on subdivided lots {s ft NA NA I.115 Existing BUA that will remain (not subject to ermittinWs ft NA NA 16 ExistingBUA that is alreadypermitted s ft NA NA 17 Existing BUA that will be removed s ft NA NA 18 Percent BUA 54% 83% 19 Design storm inches 1.0 in. 20 Design volume of SCM (cu ft) 72600 21 ( Calculation method for design volume MDC5 .ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 "Other" impervious came from big fuel island (3,360 so, small fuel island { 1,056.00 so, big slab over fuel tanks(528 so, small slab over fuel tanks (96 so , dumpster pad and apron ( 384 so. INFILTRATION SYSTEM 9 Drainage area number 1 2 EMinimum renulmd treatment volume (cu ft) 7260 cf GENERAL MDC FROM 021-11050 3 is the SCM sized to treat the SW from all surfaces at build -out? j Yes 4 1s the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM (H:V or enter "Vertical' for trenches)? vertical 6 Does the SCM have retaining walls, gabkon walls or other engineered side slopes? No — 7 Are the inlets, outlets, and receiving stream protected from erosion 10- ear storm)? Yes 8 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? Pump (preferred} -' 10 If applicable, will the SCM be cleaned out after construction? Yes 11 Does the maintenance access compk with General MDC (8)? Yes 12 1 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 Mpg 10 ? NIA 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? YesT 17 C Was the SCM designed by an NC licensed professional? INFILTRATION SYSTEM MDC FROM GZH .1051 18 Proposed slope of the subgrade surface (%) - Yes 0% _ 19 Are terraces or baffles provided? No 20 T pe of pretreatment: Other Soils Data 21 Was the soil investigated in the footprint and at the elevation of the infiltrationstem? Yes 22 SHWT elevation (fmsk) 326,00 23 Depth to SHWT per soils report (in) 24.00 24 Ground elevation at boring in soils report (fmsl) 328.00 25 Is a detailed hydrogeologic study attached if the separation is between 1 and 2 feet? NIA 26 Soil infiltration rate (inlhr) 0,60 27 Factor of safety (FS) (2 is recommended): 2.27 II Elevations 29 Bottom elevation (fmsk) 328 ft 30 Storage elevation (fmsi) 330.37 ft 31 Bypass elevation (fmsl) 330 ft For Basins Only 32 Bottom surface area (ft2) 4577 ft 33 Storage elevation surface area (ft!} 4577, ft For Trenches Only 34 Length (ft) 93 It 35 Width (ft) 56 ft 36 Perforated pipe diameter, if applicable (inches) NA 37 Number of laterals NA 38 Total length of perforated piping NA 39 Stone type, if applicable #4 40 Stone porosity (%) 40% 41 Is stone free of fines? Yes 42 Is the stone wrapped in geotextile fabric? Yes 43 Has at least one inspection port been provided? Yes Volumes/Drawdown 44 Design volume of SCM (cu ft) _ 7260 cf 45 Time to draw down {hours) _ _ _ �_ 72 hours ADDITIONAL INFORMATION 46 Please use this space to provide any additional information about the infiltration system(sY. 'I Infiltration system is a network of underground storm chambers wifhV2 foot sumps in inlet structures to serve as forebay5 _. Infiltration 1 11:38 AM 2/13/2023