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HomeMy WebLinkAboutSW6191005_Supplement-EZ Form_20200217SUPPLEMENT-EZ COVER PAGE FORMS LOADED PROJECT INFORMATION 1 1 Project Name DINING FACILITY (DFAC), SOTF 2 Pro'ectArea as 2.25 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? No COMPLIANCE WITH 02H .1003.4) 7 Width of vegetated setbacks provided feet N/A 8 Will the vegetated setback remain vegetated? 9 Is BUA other that as listed in .1 0034 c-d out of the setback? 10 Is streambank stabilization proposed on this project? No NUMBER AND TYPE OF SCMs: 11 Infiltration S stem 3 0 12 Bioretention Cell 13 Wet Pond 0 14 Stormwater Wetland 0 15 Permeable Pavement 0 16 Sand Filter 0 17 Rainwater Harvesting RWH 0 18 Green Roof 0 19 Level Spreader -Filter Strip LS-FS 0 20 Disconnected Impervious Surface (DIS) 0 21 Treatment Swale 0 22 Da Pond 0 23 StormFilter 0 24 Silva Cell 0 25 Bayfilter 0 26 _ Filterra _ 0 FORMS LOADED ,ESIGNER CERTIFICATION T 27 Name and Title: 28 Or anization: 29 Street address: 30 Cit , State, Zip: 31 Phone numbers : 32 f Email: 901 Jones Franklin Rd, Suite 300 Raleigh, NC 27606 919-532-2331 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. []_esigner CA0 C r SEAL 44924 ` fiNG1N J �LSN\- 1Jfllli1 0% seal Signature of Designer L / 31 12,0 Date DRAINAGE AREAS 1 Is this a high density ro'ect? Yes 2 If so, number of drainage areas/SCMs 3 3 Is all/part of this project subject to previous rule versions? I No FORMS LOADED DRAINAGE AREA INFORMATION Entire 5ite 1 2 3 4 Type of SCM Infiltration Basin Infiltration Basin Infiltration Basin 5 Total BUA in project (sq ft 35838 sf 26455 sf 11595 sf 11207 sf 6 New BUA on subdivided lots (subject to permitting) (sq ft)New 7permitting) BUA outside of subdivided lots (subject to s 34998 sf 12196 sf 11595 sf 11207 sf 8 Offsite - total area (sq ft 13419 sf 9 Offsite BUA (sq ft 13419 sf 10 Breakdown of new BUA outside subdivided lots: Parking (sq ft 22802 sf 11595 sf 11207 sf Sidewalks ft 2613 sf 2613 sf Roof (sci ft 9583 sf 9583 sf _ Roadway s ft Future (sq ft Other, please specify in the comment box below sq ft) New infiltrating permeable pavement on 11 subdivided lots (sq ft) 12 New infiltrating permeable pavement outside of subdivided lots s ft 13permitting) Exisitng BUA that will remain (not subject to s ft 4239 sf 9219 sf 14 Existing BUA that is already permitted s ft 840 sf 5040 sf 15 Existing BUA that will be removed (sq ft 16 Percent BUA 37% 59% 32% 63% 17 Design storm inches 1 in 1 in 1 in 1 in 18 I Design volume of SCM cu ft 19 -Calculation method for design volume 3513 cf Simple 2172 cf Simple 1020 cf Simple 915 cf Simple ADDITIONAL INFORMATION Please use this space to provide any additional information about the 20 drainage area(s): Drainage Area 1: There is both existing permitted off -site BUA of 4,200 SF and existing on -site permitted BUA of 840 SF = 5,040 SF in Line 14. The 4,200 SF existing permitted off -site BUA + 9,219 SF of Line 13 = Line 9. Therefore, Line 13 + Line 14 + Line 7 = Line 5 INFILTRATION SYSTEM 1 Drainage area number 1 2 13 2 Design volume of SCM (cu ft) 2172 cf 1020 cf 915 cf GENERAL MDC FROM 02H .1050 3 Is the SCM sized to treat the SW from all surfaces at build -out? yes yes yes 4 Is the SCM located away from contaminated soils? Yes Yes Yes 5 What are the side slopes of the SCM (H:V)? 3:1 3:1 3:1 6 Does the SCM have retaining walls, gabion walls or other engineered side slopes? No No No 7 Are the inlets, outlets, and receiving stream protected from erosion (10-year storm)? Is there an overflow or bypass for inflow volume in excess of the design volume? Yes Yes Yes 8 Yes Yes Yes 9 What is the method for dewatering the SCM for maintenance? Pump (preferred) Pump (preferred) Pump (preferred) 10 If applicable, will the SCM be cleaned out after construction? 11 Does the maintenance access comply with General MDC (8)? Yes Yes Yes 12 Does the drainage easement comply with General MDC (9)? 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)? _ 15 Is there an O&M Plan that complies with General MDC (12)7 16 Does the SCM follow the device specific MDC? Yes Yes 17 'Was the SCM designed by an NC licensed professional? Yes Yes Yes INFILTRATION SYSTEM MDC P H .1 18 Proposed slope of the subgrade surface (%) 0%. 0% 0% 19 jAre terraces or baffles provided? No No No 20 Type of pretreatment: Other Other Other Soils Data 21 Was the soil investigated in the footprint and at the elevation of the Infiltration system? Yes _ Yes Yes > 2 feet from bottom 22 SHWT elevation (fmsl) > 2 feet from bottom > 2 feet from bottom 23 Depth to SHWT per soils report (in) >10 feet >10 feet >16 feet 24 Ground elevation at boring in soils report (fmsl) 297.00 300.50 298.00 25 Is a detailed hydrogeologic study attached if the separation is between 1 and 2 feet? 26 Soil infiltration rate (in/hr) 3.00 2.50 3.00 27 Factor of safety (FS) (2 is recommended): 2,00 2.00 2.00 =I.—H- 29 Bottom elevation (fmsl) 295.75 ft 297.25 ft 297.25 ft 30 Storage elevation (fmsl) 297.25 ft 298.75 ft 298.75 ft 31 lBypass elevation (fmsl) 297.25 ft 298.75 ft 298.75 ft I Fnr RA vine 016111 32 Bottom surface area, fe: 1535 ft 1165 ft 785 ft 33 Storage elevation surface area (ft) 3170. ft 2005. ft 1540. ft For Trenchesynry 34 Length (ft) 35 Width (ft) 36 Perforated pipe diameter, if applicable (inches) 37 Number of laterals 38 Total length of perforated piping 39 Stone type, if applicable 40 Stone void ratio (%) 41 Is stone free of fines? 42 Is the stone wrapped in geotextile fabric? 43 Has at least one infiltration port been provided? Volumes/Drawdown 44 Tesign volume of SCM (cu ft) _ 45 ITime to drawdown (hours) ADDITIONAL INFORMATION Please use this space to provide any additional information about the 46 system(s): Note: See attached O+M letter for Ft. Bragg ,compliance. 2172 cf 1 1020 cf 1 915 cf Infiltration 3 2:46 PM 1/31/2020