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Home My WebLink AboutSW3220802_Supplement-EZ Form_20220816SUPPLEMENT-EZ COVER PAGE FORMS IOADEp INFORMATION act Name iAccess Self Storage Outdoor Storage Project ect Area (ac) 3 DO so stal Wetland Area ace Water Area (ac) is project High or Low Density7_ Htgh,-..-.— s this project use an off —site SCM? COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks _provided (feet) 30 8 Will the vej etatad setback remain vegetated? N!A 9 j If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d 7 NIA 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF 5CMs, [11 Infiltration System - —, '12 Bioretention Celt 13 Wet Pond _ 14 Stormwater Wetland 15 Permeable Pavement 18 Sand Filter_ 1 17 _ Rainwater Harvesting RWH — 18 Green Roof- 19 Level S reader-Fllter Strip (LS-FS) _ --- 20 Disconnected Impervious Surface (DIS) 21 Treatment Swale _ 22 D Pond - 23 _ StormF'liter- 24 Silva Cell 25 ---- -- _Bayfilter 26 1 Filterra TOR -MS tOADEp 3NER CERTIFICATION Name and Title: Kevin E. Herring PE Organization. -- Kevin E. Herrin Engine Street address: 16101 Silver Rd Ci ,State, Zip, _. Oakboro, NC 2812E ----- - _.,_ -- Phone number(s): _ 980-621.0935 -----....,T Email: kevin @ e - rri.._ngineei kevinhemnge-- Certificafori gternent7 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 hest 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. R0/ D FCSSr0��1i� SEAS. ` 20165 7tV!� . • /��llfi r!lljl5i ate - nature of Designer Zz Z Z Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCIVIs 1 3 Does this project have low density areas? No 4 If so, number of low density drainage areas 0 5 Is all/part of this project subject to previous rule versions? No I FORMS LOADED I DRAINAGE AREA INFORMATION JL Entire Site 1 4 Type of SCIVI Sand Filter 5 Total drainage areas ft) 130,680 99000 Onsite drainage areas ft) 130,680 99000 —6 7 Offsite drainage areas ft) 0 0 Total BUA in project (sq ft) 88938 sf 88938 sf —8 9 New BUA on subdivided lots (subject to 1permitting) (sq ft) 10 New BUA not on subdivided lots (subject to permitting) (sf) 11 Offsite BUA (s ft) 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft) 88938 sf 88938 sf I Sidewalks ft) Roofs ft) Roadway (sq ft) Futures 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 not on subdivided lots (sq ft) 15 Existing BUA that will remain (not subject to permitting) (sq ft) 16 Existing BUA that is already permitted (sq ft) 17 Existina BUA that will be removed (sq ft) 18 Percent BUA 68% 90% 19 Design storm (inches) 1.0 in 20 Design volume of SCIVI (cu ft) 5200cf 21 Calculation method for design volume Simple ADDITIONAL INFORMATION 22 I Please use this space to provide any additional information about the drainage area(s): See CN calcs for specific breakdown WQV(adj) - Rounded SAND FILTER 18 SHWT elevation (fmsl) See Note 19 Type of sand filter (open or closed Open 20 If closed, will the filter will be pre -cast or pour -in -place? 21 If closed, top of grate elevation fmsl 22 Is this sand filter designed to attenuate peak flows? Yes (Sediment Chamber 23 Volume that can be retained in the sediment chamber (cubic feet) 3032 cf 24 Will there be a permanent pool in the sediment chamber? No 25 Bottom of the sediment chamber fmsl 617,00 26 Area of the sediment chamber (square feet) 2986 sf 27 Physical depth of the sediment chamber inches 18 in 28 Ponding depth in the sediment chamber, above any permanent pool (inches) 291 Elevation of top of weir between chambers fmsl 618.5 Sand Chamber 30 Volume that can be retained in the sand chamber cubic feet 3032 cf 31 Bottom of the sand chamber fmsl 617,00 32 Area of the sand chamber (square feet 2986 sf 33 Physical depth of the sand chamber inches 18 in 34 Ponding depth in the sand chamber, above the sand surface (inches) 18 in 351 Elevation of the bypass device fmsl 618.5 36 Type of bypass device Outlet Structure 37 Mechanism for distributing flow over the sand surface Weir 38 Sandspecification for sand chamber ASTM C33 39 Depth above underdrain pipe inches 12 in 40 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes L42 Is at least one clean -out pipe provided at the low point of each underdrain line? Yes Will clean -out pipes be capped? Yes Please use this space to provide any additional information about 43 the sand filter(s): #9 Pump can be used but removable cap is speed on outlet structure at sand elevation Ref SHWT Report - No Evidence Found. Auger refusal at El 613+/-. (1.7' below sand filter bottom) Rev Hydrocad Storage Output 6065cf at El 618.5 (top of riprap weir & outlet elev) Riprap weir evenly splits chambers (6035/2=3032.5) Top of washed stone layer See above (5973sf at El 618.5, 5973/2 = 2986) See above See above Outlet Elev Sand Filter 1 10:57 AM 7/2/2022