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Home My WebLink AboutSW3190506_Form_(Supp.EZ)_20191015SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 Project Name - - 4 ISUirface Water Area ac 5 Is this project High or Low Denslt 7 6 Does this project use an off -site SCM7 COMPLIANCE WITH 02H .1003(4) 7 Width of vegetated setbacks provided feel 8 Will the vegetated setback remain vegetate( 9 Is BUA other that as listed in .1 0034 c-d o 10 Is streambank stabilization DroDosed on this Sealand Office 24.3 No NUMBER AND TYPE OF SCMs: 11Infiltration System 0 12 Biorelention Coll 0 13 Wet Pond 0 14 Stormwater Wotland 0 15 Permeable Pavement 0 16 Sand Filter 1 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-IFS)0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Dry Pond 0 23 Storm Filter 0 24 Silva Cell 0 25 Bayrilter 0 26 Filterra 0 FORMS LOADED DESIGNER CERTIFICATION 27 Name and Title: Frank Cantrell 28 Organization: Cardno 29 Street address: _ 9800 Southern Pine Blvd. Suite I 30 City, State, Zip: Charlotte, NC 28273 31 Phone numbers : 980-422-0936 32 Email: frank.cantrell@cardno.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. uesrgner ,yi�tirrrrrrrrrr. SEA 0398.11 N VON •,'y/r �, rCA�t%"� Seal Signature of Designer Date R12i 17,019 DRAINAGE AREAS 1 Is this a high density project? Yes 2 If so, number of drainage areaslSCMs 1 3 Is alllpart of this project subject to previous rule versions? No FORMSLOADED DRAINAGE AREA INFORMATION Entire Site 4 Type of SCM Sand Filter 1 Sand Filter 5 1 Total BUA in project (sq ft _ 102095 sf 102095 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft 7permitting) New BUA outside of subdivided lots (subject to s 8 Offsite - total area (sq ft 9 Offsite BUA s ft 10 Breakdown of new BUA outside subdivided lots: - Parking (sq ft 43926 sf 43926 sf - Sidewalk sq ft 6870 sf 6870 sf - Roofs ft 20250 sf 20250 sf - Roadway s ft 28049 sf 28049 sf - Future (sq ft 3000 sf 3000 sf - Other, please specify in the comment box below (sq ft 11 New infiltrating permeable pavement on subdivided lots (sq ft 12 New infiltrating permeable pavement outside of subdivided lots (sq ft 13permitting) Exisitng BUA that will remain (not subject to s ft 14 Existing BUA that is already ermitted s ft 15 Existing BUA that will be removed (sq ft 16 Percent SUA 40% 40% 17 Design storm inches 1 in 1 in 18 Design volume of SCM cu ft 8728 cf 8728 cf 19 Calculation method for design volume ADDITIONAL INFORMATION 20 Please use this space to provide any additional information about the drainage area(s): DRAINAGE AREA INFORMATION Entire Site 1 4 Type of SCM NIA___ _ 5 Total BUA from project (sq ft) 6 1995 rules _ SL 2006-246 2008 rules _ 2017 rules 7 New BUA on subdivided lots (subject to permitting) (sq ft) 1995 rules SL 2006-246 2008 rules _ 2017 rules 8 New BUA outside of subdivided lots (subject to permitting) (SO 1995 rules- �� SL 2006-246 2008 rules 2017 rules 9 Offslte - total area (sq ft) 1995 rules SL 2006-246 2008 rules 2017 rules 10 Offstte BUA (sq ft) SAND FILTER 1 Drainage area number 1 2 Design volume of SCM (cu ft) 8728 sf GENERAL MDC FROM 02H .1050 _ 3 11stheSCM sized to treat the SW from all surfaces at build -out? Yes 4 1 Is the SCM located away from contaminated soils? Yes 5What are the side slopes of the SCM (H:V)? 3:1 6 side slopes? No 7 Are the inlets, outlets, and receiving stream protected from erosion (10- year 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 dawatering the SCM for maintenance? 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)? 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? Yes 17 vvas the SUM designed by an NG licenseo protessional7 Yes SAND FILTER MDC FROM 02H .1056 18 �SHWT elevation (fmsl) I Less Than 678 .1 or this sand Chamhar 23 Volume that can be retained in the sediment chamber (cubic feet) 19549 cf 24 Will there be a permanent pool in the sediment chamber? No 25 Bottom of the sediment chamber (fmsl) 684.00 26 Area of the sediment chamber (square feet) 4825 sf 27 Physical depth of the sediment chamber (inches) 24 In 28 Ponding depth in the sediment chamber, above any permanent pool (inches) 7 in 29 1 Elevation of top of weir between chambers (fmsl) 686 ISond Chamher 30 Volume that can be retained in the sand chamber (cubic feet) 19549 cf 31 Bottom of the sand chamber (fmsl) 683.50 32 Area of the sand chamber (square feet) 5114 sf 33 Physical depth of the sand chamber (inches) 24 in 34 Ponding depth in the sand chamber, above any permanent pool (inches) 7 in 35 Elevation of the bypass device (fmsl) 687.5 36 Type of bypass device Overflow Wier 37 Mechanism for distributing flow over the sand surface Rip -Rap Berm 38 Sand specification for sand chamber ASTM 33 39 Depth above underdrain pipe (inches) 36 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? Sand Filter 4 9:14 AM 9/27/2019