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Home My WebLink AboutSW5200602_Supplement-EZ Form_20200820SUPPLEMENT-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 protect use an off -site SCM? Wake Electric 30 No COMPLIANCE WITH 02H .1003(4) 7 Width of ve etated setbacks provided feet 8 Will the vegetated setback remain vegetated? 9 Is BUA other that as listed in .1003 4 c-d out of the setback? 10 1 Is streambank stabilization proposed on this project? 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 Sand Filter 2 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-FS 2 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Ba filter IFilterra 0 26 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Jeff Rice, PE 28 Organization: Stantec 29 Street address: 2127 Arysley Town Blvd. Suite 300 30 City, State, Zip: Charlotte, NC 28273 31 Phone numbers : 704-329-0900 32 Email: Ieff.rice(&stantec.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. CARO "." Ia' 39082 oan4i2o2� /jrrn11110"� Seal Signature of Designer 08/14/2020 Date DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areas/SCMs 2 3 Is all/part of this project subject to previous rule versions? No FORMS LOADED DRAINAGE AREA INFORMATION Entire Site 1 2 4 T pe of SCM Sandfilter/LS-FS Sandfilter/LS-FS 5 Total BUA in project (sq ft 612789 sf 144687 sf 40758 sf 6 New BUA on subdivided lots (subject to ermitting) (sq ft 7 New BUA outside of subdivided lots (subject to ermittin s 185445 sf 144687 sf 40758 sf 8 Offsite -total area (sq ft 9 Offsite BUA (sq ft 10 Breakdown of new BUA outside subdivided lots: - Parking (sq ft - Sidewalk (sq ft 1448 sf 1448 sf - Roof (sq ft 9504 sf 2163 sf 7341 sf - Roadway s ft - Future (sq ft - Other, please specify in the comment box below (sq ft 174493 sf 141076 sf 33417 sf 11 New infiltrating permeable pavement on subdivided lots (sq ft 12 New infiltrating permeable pavement outside of subdivided lots (sq ft 13 Exisitng BUA that will remain (not subject to ermitting) (sq ft 427334 sf 14 lExistina BUA that is already ermitted (sq ft 15 Existing BUA that will be removed (sq ft 3289 sf 16 Percent BUA 47% 57% 44% 17 Design storm inches 1 in 1 in 18 Design volume of SCM cu ft 8935 cf 2559 cf 19 Calculation method for design volume simple method simple method ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage area(s): gravel and concrete pads.. SAND FILTER 1 IlDrainage area number 1 1 1 2 2 juesign volume o cu st Zbbg s GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes Yes 4 Is the SCM located away from contaminated soils? Yes Yes 5 What are the side slopes of the SCM (H:V)? 3:1 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No No 7 Are the inlets, outlets, and receiving stream protected from erosion (10- year storm)? Yes Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes 9 What is the method for dewatering the SCM for maintenance? Drawdown Orifice Drawdown Orifice 10 If applicable, will the SCM be cleaned out after construction? No No 11 Does the maintenance access comply with General MDC (8)? Yes Yes 12 Does the drainage easement comply with General MDC (9)? Yes Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? No No 14 Is there an O&M Agreement that complies with General MDC (11)? Yes Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes Yes 16 Does the SCM follow the device specific MDC? Yes Yes 17 Was the SCM designed by an NC licensed professional? Yes Yes �Nn FII TFR MOC FROM 07H 1056 18 SHWT elevation (fmsl) 19 Type of sand filter (open or closed) Open 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? No No Sediment Chamber 23 Volume that can be retained in the sediment chamber (cubic feet) 10267 cf 6713 cf 24 Will there be a permanent pool in the sediment chamber? No No 25 Bottom of the sediment chamber (fmsl) 442.00 446.00 26 Area of the sediment chamber (square feet) 5337 sf 3685 sf 27 Physical depth of the sediment chamber (inches) 24 in 24 in 28 Ponding depth in the sediment chamber, above any permanent pool (inches) 24 in I 24 in 1 448 29 1 Elevation of top of weir between chambers (fmsl) 444 Sand Chamber 30 Volume that can be retained in the sand chamber (cubic feet) 10267 cf 6713 cf 31 Bottom of the sand chamber (fmsl) 439.50 443.50 32 Area of the sand chamber (square feet) 4500 sf 1500 sf 33 Physical depth of the sand chamber (inches) 54 in 54 in 34 Ponding depth in the sand chamber, above any permanent pool (inches) 24 in 24 in 35 jElevation ofthe bypass device (fmsl) 444 448 36 Type of bypass device Conc Box Riser Conc Box Riser 37 Mechanism for distributing flow over the sand surface Evenly Evenly 38 Sand specification for sand chamber ASTM C-33 ASTM C-33 39 Depth above underdrain pipe (inches) 18 in 18 in 40 Will the media be maintained to drain at least two inches per hour at the sand surface? Yes Yes 41 Is at least one clean -out pipe provided at the low point of each junderdrain line? Yes Yes 42 lWill clean -out pipes be capped? Yes Yes ADDITIONAL INFORMATION Please use this space to provide any additional information about the Sand Filter(s): 43 Sand Filter 1 3:58 PM 8/17/2020 LEVEL SPREADER - FILTER STRIP (LS-FS rainage area number esign volume of SCM MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? Yes Yes 4 Is the SCM located away from contaminated soils? Yes Yes 5 What are the side slopes of the SCM (H:V)? 20:1 20:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Yes Yes 8 Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes 9 What is the method for dewatering the SCM for maintenance? Other Other 10 If applicable, will the SCM be cleaned out after construction? Yes Yes 11 Does the maintenance access comply with General MDC (8)? Yes Yes 12 Does the drainage easement comply with General MDC (9)? Yes Yes 13 If the SCM is on a single family lot, does (will?) the plat comply with General MDC (10)? No No 14 Is there an O&M Agreement that complies with General MDC (11)? Yes Yes 15 Is there an O&M Plan that complies with General MDC (12)? Yes Yes 16 Does the SCM follow the device specific MDC? Yes Yes 17 lWas the SCM designed by an NC licensed professional? Yes Yes LS-FS MDC FROM 02H .1059 18 Length of level spreader (feet) 40 ft 20 ft 19 Does the LS-IFS receive flow from the drainage area or another SCM? Yes Yes 20 Flow rate to LS-IFS during design storm (cfs) 3 cfs 1 cfs 21 Is a bypass device provided? No No 22 If yes, what is the bypass device? 23 Is this LS-IFS designed to receive flow from the drainage area during the 10-year storm? yes yes 24 Has a blind swale been provided? Yes Yes 25 Does the blind swale provide for uniform overtopping of the level spreader? Yes Yes 26 What material will be used for the level spreader? concrete concrete 27 Will the construction tolerance be < 0.25 inch along the level spreader length? Yes Yes 28 Will the level spreader be straight or convex in plan view? Yes Yes 29 Height of the drop from the level spreader to the transition zone (inches) 3 in 3 in 30 Width of the transition zone (inches) 36 in 36 in 31 Protection for the transition zone Aggregate Aggregate 32 Width of the filter strip (feet) 30 ft 30 ft 33 Is the filter strip free of draws and channels? Yes Yes 34 Has this been verified in the field? Yes Yes 35 Slope of the filter strip (%) 5% 5% 36 Is this slope uniform across the entire filter strip? Will the first 12" of soil be adjusted if needed to promote plant growth? Yes Yes 37 No No 38 Will the filter strip and side slopes be planted with non -clumping, deep-rooted sod? Yes Yes 39 Species of sod that will be used common bermuda common bermuda Will soil be temporarily stabilized until permanent vegetation is 40 established? ADDITIONAL INFORMATION Please use this space to provide any additional information about the 41 level spreader -filter strip(s): Yes Yes LS-FS 1 4:00 PM 8/17/2020