The URL can be used to link to this page

Home My WebLink AboutSW6231110_Supplement-EZ Form_20240617 SUPPLEMENT—EZ COVER PAGE IFORMS LOADED PROJECT INFORMATION s 1 ,Project Name �River Terminals,Inc. Fayetteville Site 2 Project Area(ac) — 29 37 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? 9 " No COMPLIANCE WITH 02H.1003(4) 7 Width of vegetated setbacks provided feet, 30 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 1 10 Is streambank stabilization proposed on this project? — No NUMBER AND TYPE OF SCMs: 11 -I— Infiltration System ^_ 12 Bioretention Cell 13 Wet Pond 14 Stormwater Wetland —_— —__—�— �— 15 Permeable Pavement � 16 'Sand Filter M _ "` V— i 17 Rainwater Harvesting(RWHL 18 1Green Roof —__��___—_ �__ ---____ _ 19 'Level Spreader-Filter Strip(LS-FS) 20 Disconnected ImperviousSurface(DIS) .--.— _ 21 'Treatment Swale 22 !Dry Pond 23 StormFilter - --__ 24 Silva Cell '_ 25 Bayfilter —� 26 Filterra --- — _ �� -- I FORMS LOADED I DESIGNER CERTIFICATION _`-' •d; '``-i4T.M ,- ,, 4 -w,. t, 27__Name and Title: _ Adam H.Gray 28 'Organization: ` Hanover Design Services,PA 29 ,Street address: 1123 Floral Parkway 30 'City,State,Zip: _ _— Wilmington,NC 28403 31- 'Phone number(s): 910-343-8002 _ ~T 32 LEmail: agrady@hdsilm.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 ��• ps.SS/02•/2//^ •a SEAL r' - ignature of Designer /43166 • • % t IN del 20Z/ Seal Date DRAINAGE AREAS 1 Is this a high density ro:ect? Yes 2 If so,number of drainage areas/SCMs 1 3 Does this project have low density areas? No 4 If so,number of low density drainage areas 0 Is all/part of this project subject to previous rule 5 versions? No IFORMS LOADED I DRAINAGE AREA INFORMATION Entire Site 1 —1 x 4 Type of SCM Infiltration Basin 5 Total drainage area(sq ft) , 1,279,455 167164 I 6 ,Onsite drainage area(sq ft) 1279455 167164 7 'Offsite drainage area(sq ft) n/a __ n/a 8 Total BUA in project(sq ft) 332485 sf 94617 sf New BUA on subdivided lots(subject to permitting) 91(sq ft) 83282 sf^_ _,�83282 sf__�_ New BUA not on subdivided lots(subject to 10 +permitting)(sf) na na 11 Offsite BUA(sq ft) na na 12 Breakdown of new BUA not on subdivided lots: -Parkingjsq ft) _ 46609 sf 46609 sf- -Sidewalk(salt ��-2929 sf 2929 sf R� Roof(sq ft — 3744 sf 3744 sf -Roadway(sq ft) sf sf -Future(sq ft) 30000 sf 30000 sf -Other,please specify in the comment box below(sq ft) 'New infiltrating permeable pavement on 13 'subdivided lots(sq ft) na na 'New infiltrating permeable pavement not on 14 'subdivided lots(sq ft) na na Existing BUA that will remain(not subject to 15 permitting)(sq ft) 249203 sf 11335 sf _16 �Existin BUA that is already permitted(sq ft) 17 Existing BUA that will be removed(sq ft) 18 Percent BUA 26% 57%__ 19 Design storm(inches) 1.0 in 1.0 in 20 Design volume of SCM(cu ft) 24101 cf 24101 cf 21 1Calculation method for design volume simple method simple method ADDITIONAL INFORMATION Please use this space to provide any additional information about the 22 'drainage area(s): The 11,335 sf of Existing BUA that will remain in SCM drainage area was included in calculations although not required INFILTRATION SYSTEM 1 !Drainage area number i 1 2 Minimum required treatment volume(cu ft) r 7793 cf 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 'What are the side slopes of the SCM(H:V or enter"Vertical"for 5 itrenches)? 3:1 6 'Does the SCM have retaining walls,gabion walls or other engineered I — Iside slopes? No !Are the inlets,outlets,and receiving stream protected from erosion 7 j(10-year storm)? I Yes 8 'design there an overflow or bypass for inflow volume in excess of the 1 (design volume? Yes 9 What is the method for dewatering the SCM for maintenance? I Pump(preferred) `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)? N/A 14 Its 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 i Does the SCM follow the device specific MDC? J Yes 17 'Was the SCM designed by an NC licensed professional? Yes INFILTRATION SYSTEM MDC FROM 02H.1051 18 Proposed slope of the subgrade surface(%) _L 0% _ _ 19 Are terraces or baffles provided? No 20 Type of pretreatment: I Other Soils Data 21— Was the soil investigated in the footprint and at the elevation of the infiltration system? Yes 22 JSHWT elevation(fmsl) 76.50 23 Depth to SHWT per soils report(in) 57.00 24 Ground elevation at boring in soils report(fmsl) 81.20 —' 25 I Is a detailed hydrogeologic study attached if the separation is between 1 and 2 feet? N/A 26 !Soil infiltration rate(in/hr) 6.00 27 !Factor of safety(FS) (2 is recommended): 2.00 Elevations `""'-' 29 !Bottom elevation(fmsl) 1 78.5 ft --- 30 Storage elevation(fmsl) 80.ft 31 Bypass elevation(fmsl) I 80 ft For Basins Only L32 Bottom surface area(ft2) I 14547 ft 33 Storage elevation surface area(ft2) — — I 17611.ft For Trenches Only 34 1 Length(ft) r. --na 35idth(ft) `----- ----- - na 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 I na —^ 40 s porosity(%) --- !_ loo na 41 i Is stone free of fines? I No 42 Its the stone wrapped in geotextile fabric? -� No 43 Has at least one inspection port been provided? I No Volumes/Drawdown44 'Design volume of SCM(cu ft) 1 24101 cf 45 Time to draw down(hours) i 7 hrs ADDITIONAL INFORMATION 46 Please use this space to provide any additional information about the, infiltration system(s): f Other on line 20 refers to transmission by overland grass and grass lined channels to help remove sediment and trash prior toentering the infiltration basin nfiltration 3 9:26 AM 3/20/20;