The URL can be used to link to this page

Home My WebLink AboutSW4221202_Supplement-EZ Form_20230404SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 lProiectName Project Area (ac) Coastal Wetland Area (ac) Surface Water Area (ac) Is this project High or Low Density? Does this project use an off -site SCM? Dollar General Store #08606 1.74 0 0 No COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feet 1500 8 Will the vegetated setback remain vegetated? 9 If BUA is proposed in the setback, does it meet NCAC 02H.1003 4 c-d ? 10 1 Is streambank stabilization proposed on this project? NUMBER AND TYPE OF SCMs: 11 Infiltration S stem 12 Bioretention Cell 13 Wet Pond 14 Stormwater Wetland 15 Permeable Pavement 16 Sand Filter 1 17 Rainwater Harvesting RWH 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 Ba filter lFilterra 25 26 FORMS LOADED NER CERTIFICATION Name and Title: Organization: Street address: City, State, Zip: Phone number(s): Email: Justin Church. PE - BREC, PA 1520 Meadowview Drive Wilkesboro, NC 28697 (336) 844-4088 justin(&brec.biz ineer 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. o0'FEssio'�G� SEAL 9< 035736 = `�G'•�NGIN��'•G� / T,N C. CND /��/I111111\\`\\ C� Signature Designer 04/04/2023 Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 1 3 Does this roject 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 FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 4 T pe of SCM SAND FILTER 5 Total drainage area (sq ft 76,063 52,496 6 Onsite drainage area (sq ft 76,063 46,951 7 Offsite draina a area (sq ft 0 5545 8 Total BUA in project (sq ft 36769 sf 41446 sf 9permitting) New BUA on subdivided lots (subject to s ft sf sf 10 New BUA not on subdivided lots (subject to permitting) s 36769 sf 41446 sf 11 Offsite BUA (sq ft sf 5545 sf 12 Breakdown of new BUA not on subdivided lots: Parking (sq ft 23694 sf 22826 sf - Sidewalk (sq ft 2292 sf 2292 sf - Roof (sq ft 10783 sf 10783 sf - Roadway s ft sf sf Future (sq ft sf sf - Other, please specify in the comment box below (sq ft sf sf 13 New infiltrating permeable pavement on subdivided lots (sq ft sf sf 14 New infiltrating permeable pavement not on subdivided lots (sq ft sf sf 15permitting) Existing BUA that will remain (not subject to s ft sf sf 16 lExistina BUA that is already permitted (sq ft sf sf 17 Existing BUA that will be removed (sq ft 6584 sf 6584 sf 18 Percent BUA 48% 79% 19 Design storm inches 1.0 in 20 Design volume of SCM cu ft 3051 cf 21 Calculation method for design volume SHULER ADDITIONAL INFORMATION 22 Please use this space to provide any additional information about the drainage area(s): Offsite drainage areas draining to SCM are assumed to be 100% BUA for design purposes; however, current conditions are a mix of grass and roadway pavement. SAND FILTER MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? YFes 4 Is the SCM located away from contaminated soils? Yes 5 What are the side slopes of the SCM H:V ? 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? Yes 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 desi n 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? N/A 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 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 161 Does the SCM follow the device specific MDC? Yes 17 Was the SCM designed by an NC licensedprofessional? Yes SAND FILTER MDC FROM 02H .1056 18 SHWT elevation (fmsl) 786 19 Type of sand filter (open or closed) Closed 20 If closed, will the filter will be pre -cast or pour -in -place? Pre Cast 21 If closed, top of grate elevation (fmsl) 791 22 Is this sand filter designed to attenuate peak flows? No I Sediment Chamber 23 Volume that can be retained in the sediment chamber (cubic feet) 1848 cf 24 Will there be a permanent pool in the sediment chamber? No 25 Bottom of the sediment chamber (fmsl) 788.00 26 Area of the sediment chamber (square feet) 616 sf 27 Physical depth of the sediment chamber (inches) 24 in 28 Ponding depth in the sediment chamber, above any permanent pool (inches) 24 in 29J Elevation of top of weir between chambers (fmsl) 788.25 I Sand Chamber 30 Volume that can be retained in the sand chamber (cubic feet) 1203 cf 31 Bottom of the sand chamber (fmsl) 788.00 32 Area of the sand chamber (square feet) 650 sf 33 Physical depth of the sand chamber (inches) 24 in 34 Ponding depth in the sand chamber, above the sand surface (inches) 24 in 35 Elevation of the bypass device (fmsl) 790 36 Type of bypass device WEIR 37 Mechanism for distributing flow over the sand surface LEVEL SPREADER 38 Sand specification for sand chamber ASTM C33 39 Depth above underdrain pipe (inches) 18 in 40 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes 41 Is at least one clean -out pipe provided at the low point of each underdrain line? Yes 42 Will clean -out pipes be capped? Yes ADDITIONAL INFORMATION 43 Please use this space to provide any additional information about the sand filter(s): Design is a hybrid above ground/below ground solution. The sediment chamber is split between above ground and below ground, and all of the sand chamber is below ground (closed bottom). Sand Filter 3 10:29 AM 4/4/2023