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HomeMy WebLinkAboutSW8121018_COMPLIANCE_20121030STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW r7l�B�,P� DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE �iCOMPLIANCE EVALUATION INSPECTION DOC DATE YYYYMMDD Permit Number: _ � �4 /�j�2/< (to he provided by DIVQ) Drainage Area Number: Infiltration Basin Operation and Maintenance Agreement I will keep a maintenance record on this BMP. This maintenance record will be kept in a log in a known set location. Any deficient BMP elements noted in the inspection will be corrected, repaired or replaced immediately. These deficiencies can affect the integrity of structures, safety of the public, and the removal efficiency of the BMP. Important maintenance procedures: — The drainage area will be carefully managed to reduce the sediment load to the infiltration basin. — Immediately after the infiltration basin is established, the vegetation will be watered twice weekly if needed until the plants become established (commonly six weeks). — No portion of the infiltration basin will be fertilized after the initial fertilization that is required to establish the vegetation. — The vegetation in and around the basin will be maintained at a height of approximately six inches. After the infiltration basin is established, it will be inspected once a quarter and within 24 hours after every storm event greater than 1.0 inches (or 1.5 inches if in a Coastal County). Records of operation and maintenance will be kept in a known set location and will be available upon request. Inspection activities shall be performed as follows. Any problems that are found shall be repaired immediately. BMP element: Potentialproblem: How I will remediate theproblem: The entire BMP 'Trash/debris is present. Remove the trash/debris. The perimeter of the Areas of bare soil and/or Regrade the soil if necessary to infiltration basin erosive gullies have formed. remove the gully, and then plant ground cover and water until it is established. Provide lime and a one-time fertilizer application, The inlet device: pipe or The pipe is clogged (if Unclog the pipe. Dispose of the swale applicable). sediment off -site. The pipe is cracked or Replace the pipe. otherwise damaged (if applicable). Erosion is occurring in the Regrade the swale if necessary to swale (if applicable). smooth it over and provide erosion control devices such as reinforced turf matting or riprap to avoid future problenis with erosion. Form SW40I-Infiltration Basin O&M-Rev.3 OCT 3 0 2012 Page 1 oC3 BY: BMP element: The forebay The main treatment area The embankment The outlet device The receiving water Potentialproblem; Sediment has accumulated and reduced the depth to 75% of the original design depth. Erosion has occurred or riprap is displaced. Weeds are present A visible layer of sediment has accumulated. Water is standing more than 5 days after a storm event. Weeds and noxious plants are growing in the main treatment area. Shrubs or trees have started to grow on the embankment._ An annual inspection by an appropriate professional shows that the embankment needs repair. Clogging has occurred. The outlet device is damaged Erosion or other signs of damage have occurred at the outlet. form SW40 I -Infiltration Basin O&M-Rev.3 How I will remediate the problem: Search for the source of the sediment and remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Provide additional erosion protection such as reinforced turf matting or riprap if needed to prevent future erosion problems. Remove the weeds, preferably by hand. If pesticides are used, wipe them on the plants rather, than Search for the source of the sedimentand remedy the problem if possible. Remove the sediment and dispose of it in a location where it will not cause impacts to streams or the BMP. Replace any media that was removed in the process. Revegetate disturbed areas immediately. Replace the top fear inches of filter media and see if this corrects the standing water problem. If so, revegetate immediately. If not, consult an appropriate professional for a more extensive repair. Remove the plants by hand or by wiping them with pesticide (do not svraO. Remove shrubs or trees immediately. Make all needed repairs. Clean out the outlet device. Dispose of the sediment off -site. _Repair or replace the outlet device. Contact the NC Division of Water Quality 401 Oversight Unit at 919- 733-1786. OCT 3 0 Z01Z BY: Page 2 of 3 L Permit Number: {to be provided by DIVA) I r � to SO 0 pe r m ao a �Cr 0c 0 0 �(D 0 0 0 0 I acknowledge and agree by my signature below that I ant responsible for the performance of the maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. Project nanie:AutoZone - Ceder Point BMP drainage area number: Print name:James G Title:Vice-President Address:123 S. Front Street Memphis, TN 38103 ^ Phone:901-495-8701 Signature: Date: 11 Note: The legally responsible party should not be a hornmvners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. I l .Jay.•U a Notary Public for the State of County of _ k.tt!,L , do hereby certify that personally appeared before me this L day of 2o, z , and acknowledge the due execution of the forgoing bioretention maintenance requirements. Witness my liand and official seal, yyD R. H �i 4• SATE • l OF T9*0$EE n : t4O'DkW : .i. 0'• PLUJC •` �� !rr ttt�� SEAL My commission expires 2 •11"- Form SW401-Infiltration Basin O&M-Rev.3 ",r• ti' Lo . OCT 3 0 2G1z BY: Page 3 of 3 Permit No, (to be provided by DWQ) Nip D=�4 W ArFgQG STORMWATER MANAGEMENT PERMIT APPLICATION FORM p NCGENR 401 CERTIFICATION APPLICATION FORM INFILTRATION BASIN SUPPLEMENT This form must be filled out, printed and submitted. The Requlned Items Checklist (Part ftl) must be printed, filled out and submitted along with all of the required information. Project Name Auto Contact Person Matt Phone Number 919 Date Drainage Area Number i Site Characteristics Drainage area Impervious area 33 77$ OQ'.?'_ : f? Percent impervious 73.80 % Design rainfall depth 1;5Q,`•L in Peale Flow Calculations 1-yr, 24-hr rainfall depth 1-yr, 24-hr intensity °< 4:66 : =`:. irVhr Pre -development 1-yr, 24-hr discharge :;:':1:477.7 ; "a f Isec Post -development 1-yr, 24-hr discharge fflsec Pre/Post 1-yr, 24-hr peak flow control 3,50 f'/sec Storage Volume: Non -SA Waters Minimum design volume required= ft3 Design volume provided ff3 %����� Storm a Volume: SA Waters g 1.5' runoff volume Q Pre -development 1-yr, 24-hrruftoffvolume 837a16';'.=ift3 _ SEAL Post -development 1-yr, 24-hr runoff volume :: 3;964.001 ' ft3 _ # a1 Minimum required volume Volume provided P 91� 47. f? :° 9'482.OQ:::::; a OK ft � 3i 11 9 F jJ� ¢:` �GI Soils Report Summary a° '• �° O`�� tiii E.Soil '��'vrrvrl type 1llfando Sarid r Infiltration rate ;'S:flO`::._ _ _:; ;:: inlll r SHWT elevation- fmsl Basin Design Parameters d?b Drawdown time _ 00_ :: _: days 0K Basin side slopes 3�UQ :1 OK Basin bottom elevation :''=2200i:: fmsl OK Storage elevation `=24`.5l)° ;' = hnsl Storage Surface Area 4;990,00 -'i?i ft Top elevation '.=':`25.00 -:;::- I fmsl Basin Bottom Dimensions Basin length Basin width Bottom Surface Area Form SW401-IrAtreti3n Basin-Rev.5 11Apr2011 Parts L & II. Design Summary, Page 1 of 2 Permit (to be provided by DWQ) Additional Information Maximum runoff to each inlet to the basin? 0,05 ac-in OK Length of vegetative filter for overflow N/A ft OK Distance to structure N/A ft OK Distance from surface waters 100.00 ft OK Distance from water supply well(s) 100.00 ft OK Separation from impervious soil layer 200 It OK Naturaily occuring soil above shwt 2.00 It OK Bottom covered with 4-in of clean sand? Y (Y or N) OK Proposed drainage easement provided? Y (Y or N) OK Capures all runoff at ultimate build -out? Y (Y or N) OK Bypass provided for larger storms? Y (Y or N) OK Pretreatment device provided RIP -RAP Form SW401-Infiltration Basin-Rev.5 11Apr2011 0 C T 3 0 2012 Parts I. & li. Design Summary, Page 2 of 2 BY: Permit No. (to be provided by DwQ) Ill: REQUIRED]TEMS CHECKLIST Please indicate the page or plan sheet numbers where the supporting documentation can be found. An incomplete submittal package will result in a request for additional information. This will delay final review and approval of the project. Initial in the space provided to indicate the following design requirements have been met. If the applicant has designated an agent, the agent'may initial below. If a requirement has not been met, attach justification. Page/ Plan Initials Sheet No. All L I1l�L C/___� C'I• S Plans (1" - 50' or larger) of the entire site showing: Design at ultimate build -out, Off -site drainage (if applicable), Delineated drainage basins (include Rational C coefficient per basin), Basin dimensions, Pretreatment system, High flow bypass system, Maintenance access, Proposed drainage easement and public right of way (ROW), Overflow device, and Boundaries of drainage easement. 2. Partial plan (1" = 30' or larger) and details for the infiltration basin showing: Bypass structure, Maintenance access, Basin bottom dimensions, Basin cross-section with benchmark for sediment cleanout, Flow distribution detail for inflow, Vegetated filter, and Pretreatment device. 3. Section view of the infiltration basin (V = 20' or larger) showing: Pretreatment and treatment areas, and Inlet and outlet structures. ML 4. A table of elevations, areas, incremental volumes & accumulated volumes to verify the volume provided. 01iL tic 5. A soils report that is based upon an actual field investigation, soil borings, and infiltration tests. The results of the soils report must be verified in the field by DWQ, by completing & submitting the soils investigation request form. County soil maps are not an acceptable source of soils information. �IfL Cl.3 6. A construction sequence that shows how the infiflration basin will be protected from sediment until the entire drainage area is stabilized. M1 7. The supporting calculations. MIf 8. A copy of the signed and notarized operation and maintenance (0&M) agreement. A 9. A copy of the deed restrictions (if required). OCT 3 0 z012 Form SW401-Infiltration Basin-Rev,4 Page 1 of 1 Part III. Required Items Checklist, Page 1 of 1 IF . ; NCDENR North Carolina Department of Environment and Natural Resources Request for Express Permit Review For DENR Use ONLY Reviewer. SUbmil: O -f3 0 7�u,'� .o Time: � Confirm: _��( 4- FILL-IN all the information below and CHECK the Permit{s) you are requesting for express review. FAX or Email the completed form to Express Coordinator along with a completed DETAILED narrative, site plan ii file) and vicinity map (same items expected in the application package of the project location�Please include this form in the application package. • Asheville Region -Alison Davidson 828-296-4698;alison.davidson ncdenr.gov • Fayetteville or Raleigh Region -David Lee 919-791-4203; david.ie ncdenr. ov • Mooresville & -Patrick Grogan 704-663-3772 or patrick.orogan@ncdenr.gov • Washington Region -Lyn Hardison 252-946-9215 orlyn.hardison ncdenr.gov • Wilmington Region -Janet Russell 910-350-2004 or JanetrussellAncderinctov NOTE: Project application received after 12 noon will be stamped in the following work day. OCT ZS t 2(o ocz o s " _11_% (5e nub 1A-1 Project Name: AUTOZONE Bounty: CARTERET Applicant: WADE DAVIS Company: AUTOZONE Address: 123 SOUTH FRONT STREET, 3RO FLOOR City: MEMPHIS, State: TN Zip: 38103-_ Phone: 901-495-8701, Fax: 901-495-8969, Email: Aade.davis@autozone.com Physical Location:NC HIGHWAY 24 (CEDAR POINT BOULEVARDIAT SHERWOOD AVENUE Project Drains into BOATHOUSE CK waters — Water classification SA;HQW (for classification see-hftp:tth2o.enr.state,nc.uslbimsireports/reportsWB.html) Project Located in WHITE OAK River Basin. Is project draining to class ORW waters? Y , within''/2 mile and draining to class SA waters Y or within 1 mile and draining to class HQW waters? Y Engineer/Consultant: MATT LOWDER Company: TRIANGLE SITE DESIGN, PLLC Address: 4006 BARRETT DRIVE, SUITE_203 City: RALEIGH, State: NC Zip: 271 Phone: 919-553-6570, Fax: _-_-_, Email: mlowder@t6angtesitedesign.com SECTION ONE: REQUESTING A SCOPING MEETING ONLY SW SW SW SW SW ❑ Scoping Meeting 9RLY ❑ DWQ, ❑ DCM, ❑ DLR, ❑ OTHER: SECTION TWO: CHECK ONLY THE PROGRAM (5) YOU ARE REQUESTING FOR EXPRESS PERMITTING ❑ 401 Unit ❑ Stream Origin Determination: — # of stream calls - Please attach TOPO map marking the areas in questions ❑ Intermittent/Perennial Determination: _ # of stream calls - Please attach TOPO map marking the areas in questions ❑ 401 Water Quality Certification ❑ Isolated Wetland (___ linear ft or _acres) ❑ Riparian Buffer Authorization El Minor Variance ❑ Major General Variance ® State Stormwater ❑ General ❑ SFR, ❑ SFR < 1 ac. ❑Bkhd & Bt Rmp, ❑ Clear & Grub, ❑ Utility ❑ Other ❑ Low Density ❑ Low Density -Curb & Gutter — # Curb Outlet Swales ❑ Off -site [SW (Provide permit #)] ❑ High Density -Detention Pond 1 # Treatment Systems '® High Density -Infiltration 1 #Treatment Systems ❑ High Density -Bio-Retention _ # Treatment Systems [IHigh Density -SW Wetlands _ # Treatment Systems ❑ High Density -Other _ # Treatment Systems / ❑ MOD:❑ Major ❑ Minor ❑ Plan Revision ❑ Redev. Exclusion SW (Provide permit 4) ❑ Coastal Management ❑ Excavation & Fill ❑ Bridges & Culverts ❑ Structures Information ❑ Upland Development ❑ Marina Development ❑ Urban Waterfront ® Land Quality ® Erosion and Sedimentation Control Plan with 1_6 acres to be disturbed.(CK #, (for DENR use)) SECTION THREE — PLEASE CHECK ALL THAT IS APPLICABLE TO YOUR PROJECT (for both scopinp and express meeting request), Wetlands on Site ❑ Yes ® No Wetlands Delineation has been completed: ❑ Yes ® No US ACOE Approval of Delineation completed: ❑ Yes ® No Received from US ACOE ❑ Yes ® No Buffer Impacts: ® No ❑ YES: _acre(s) Isolated wetland on Property ❑ Yes ® No 404 Application in Process wl US ACOE: ❑ Yes ® No Permit For DF.NPR use only Fee Split for multiple permits: [Check # i Tataf Fee Amount SUBMITTAL DATES Fee SUBMITTAL DATES Fee CAMA $ Variance (❑ Maj; ❑ Min) 1 $ SW ( HD, EFLD, El Gen) 1 $ 401: $ LQS $ Stream Deter— $ NCDENR EXPRESS March 2009 FC El T 1 2 2012 I. WE Stormwater Narrative AutoZone Cedar Point Boulevard (NC Highway 24) & Sherwood Avenue Cedar Point, NC Tax Parcel ID: 537411764068000 & 537411762196000 At the intersection of NC Highway 24 (Cedar Point Boulevard & Sherwood A venue) Site Information: Total Site Area = 2.66ac Disturbed Area = 1.6ac Wetland No wetland or stream features on the site Developer = AutoZone, Inc. Wade Davis 123 South Front Street, 3`d Floor Memphis, NC 38103 901-495-8701 Owner = Current Property Owner Property Owner at Time of Construction Sound Banking Company Kirkland Assets, LLC Andrea M. Benton Ralph H. Falls, III Morehead City, NC 28557 1310 South Tryon Street, Suite 104 252-247-1938 Charlotte, NC 28203 704-333-4244 Engineer = Triangle Site Design, PLLC Matt Lowder, PE 4006 Barrett Drive, Suite 203 Raleigh, NC 27609 919-553-6570 mlowder@trianglesitedesign.com Development Plan: The proposed development will consists of an AutoZone retail store. A stormwater infiltration basin will be constructed to treat stormwater runoff from the AutoZone for water quality & water quantity control. The stormwater infiltration system is designed to treat runoff from the impervious areas of the site. The existing site condition for the site is open space with trees spaced throughout the site. Phasing: All of the site construction will be developed in one phase of construction. Utility Systems: Domestic water supply will be provided via a new service line from the West Carteret water system. Sanitary sewer will be provided via a new on -site septic system to be reviewed and approved by the Carteret County Health Department. Historic/Public Money: The property does not contain any historic sites and is not being funded with public monies. NCDENR: There are no known non-compliance issues with DENR Agencies. 1� Stormwater Information: River Basin: White Oak Stream Classification: SA, HQW Stream: Drains to Boathouse Creek Stormwater Design: State Stormwater (Coastal County) Density Option: High Density Development Type: Commercial Impervious Area: Total Site Area: Impervious Area: Open Area: 115,855sfsf (2.66ac) 33,778sf (29.2% of site) 82,077sf (70.8% of site) Proposed Treatment Measures: Infiltration Basin Will all built -upon areas be collected: The proposed buildings and parking lots will drain to the BMP infiltration basin. Buffer Requirements: Municipality required landscape buffers required at property perimeter, no development within buffers On-site/off-site runoff: No off -site runoff will drain into the proposed stormwater management system. Road Construction Requirements: The NCDOT is not requiring turn lanes in association with this project. Soils Evaluation: Infiltration Rate: 5"/hr-10"/hr SHWT: 55-60" Below Surface (existing surface elevation = 22.0±; therefore SHWT = 17.4±) Site Evaluation Date: 8/30/12 EJVED OCT 1 2 2012 a�Y�= r it AMM N 'ilm "m n ITMIE NH 8 �ef 0101 R ORD :Hzamm 8HOIS r all iy!y'Iiilot i I i• .�11f =!e' `.� i Ij�il !I l�=r1'!I �.rl=lllj�li�lfl:i r rr .. ra=o= rlr 11H I r r r r r r r a � il! 151.= r � • . r ilink • • • • • • 5 . . a y ■■ ee ii yy , , �a 5 I I I 1 l 1 I I 1 III gg9� Page 2 of 2 DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION Complete and email this form to iVincent.Lewis(cDncagrr.gov . (Note new email address for Vince Lewis). If there are more than 7 areas to be tested, attach a second sheet. pl4g1IL State Soil Scientist Confirmation Visit dateltime: Project Name: AUTOZONE County: CARTERET Street Address: NC Highway 24 A- Sherwood Drive Directions from the nearest intersection of two major roads: FROM ONSLOW COUNTY SITE IS BESIDE MARSH HARBOR SALES OFFICE >1 acre being disturbed? ®YES [:]NO CAMA Major required? DYES ONO Consultant Name: HAYWOOD PITTMAN Phone: 910-330-2784 Consultant Firm Name: Pittman Soil Consulting Bore Number 1 2 3 4 5 7�7 „ A Existing Ground Elevation 21 21.5 22 21 23 1 KX�., b) Proposed Bottom Elevation 22 22 22 22 22 :,. y c Difference a minus b 0 0 0 0 1 1 1 ; d Add 2 ft. Min. Bore De th 2 2 2 2 1 3 e Hardpan Depth? NA NA NA NA NA Approx. Elev. Of SHWT 18 18.5 17 18 20 Max. lowest bottom elev. 20 20.5 19 20 22 ';. h Infiltration Rate OK? * 'Vm M- k i Confirmation of SHWT * For projects requiring more than 5 hand borings, manpower or equipment to conduct the excavation must be provided by the consultant. *State Soil Scientist Use ONLY Comments Required Attachments: , 1. Legible vicinity map. 2. Complete Soils Report. 3. PDF formatted site plan with the boring locations to be tested. Site plans should be emailed or hand -delivered only. Illegible faxed maps will not be accepted. All proposed infiltration areas and existing, active utility lines located within the proposed basin/trench must be marked and flagged. If these areas are not flagged, the Soils Scientist reserves the right to decline to do the investigation, If the proposed infiltration system will be located in an area of existing pavement and there is no open area nearby, equipment capable of breaking through the impervious layer must be provided. The soils investigation does not take the place of a soils report prepared by an appropriate professional. The Soils Scientist will only verify the soil conditions that are reported in the Soils Report, and make a determination as to the suitability of the site to meet the infiltration design requirements under NCAC 2H.1000, and assumes no liability should the system fail. SAWQSIStormWater\Forms & TemplateslApplication Formslinfiltration site visit Revised 3/12 k I Mi-iii -2 d k ON 3 I. " - I 1001 ji if iu! IF STORE NMMER: 4980 CAA@ POW BOULUM by IT IUGHWIY 24 CEDAR PDIXT, NC CAM= cowm a I pi • 30RI ISORIN 2 7..Vl&r J PROPOSED AUTOZONE LEGEND THIS SOIL SKETCH WAS PREPARED USING FIELD DATA p OOp •ITl _ HWY 24 CEDAR POINT CARTERET COUNTY PITTMAN SOIL CONSULTING • /UGER eoRp+lo AND AERIAL MAPS. THIS IS A PRELIMINARY SOIL SKETCH, AND ALL LOCATIONS SHOULD BE CONSIDERED APPROXIMATE- ADDITIONAL SOIL AREAS MAY BE LOCATED WkTHIN PROJECT. THIS IMAGE WAS TAKEN fl4 t NORM STORM WATER SOIL EVALUATION IOR01 GRE30RY FORK RD, C�x.R m" RroRE-9 �0.)10.i�6� F-smaza.3180 FHOM A TRIANGLE SITE DESIGN CAD FILE. IT IS NOT SURVEY QUALITY AND SHOULD NOT BE USED AS SUCH- DATE 9-12-12 SCALE I--- �i - tPlA ra92 PO Box 1387 Richlands, NC 28574 Phone: 910-330-2784 pi ttmansoil @yahoo. com ................................................................... August 30, 2612 Matt Lowder Triangle Site. Design 4006 Barrett Drive - Raleigh, NCB .27609 Dear Mr. Lowder - The following is a,summary of the soil profiles taken at -the proposed Autozone site located on Hwy.24 in the Cedar.Point,afca of Carteret County. The purpose of this evaluation-was'to determine estimated. Seasonal.High NA"ater Table�(SHWI) and to determine the infiltration.rate of the soil. A hand auger was used to obtain the soil profiles and"to determine the SHWT. Field techniques outlined in the North Carolina .Lm4,s crud Rules.for Seii,age Treatmel7i-and Disposal Systems were used to determine soil texture. structure. consistency and soilwetness condition. Findings BORING,1 SHWT 36" KSAT DEPTH TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES "HR. 0-20" LS GR NS. NE 10Y/R 311 5-10" 2030" LS ' GR NS. NE 10YR 313. 5-10" 30-36" LS, GR NS. NE 2.5Y 514 1OYR 3/3 5-10" 36-60" LS GR NS. NE 2.5Y:514 2.5Y 3/1 5-10" S BORING 2 SHWT 55" KSAT DEPTH TEXTURE' STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES "HR. 0-6'" LS GR NS. NE 10Y/R.311 5-10, 6-12" LS GR' NS' NE 10YR 414 12-55" LS GR NS: NE 2.5Y 614 5-10" 55-" LS GR NS: NE 2 5Y 6/4 2.5Y 7/2 10YR 518 5-10 PO Box 1387 Richlul7ds„ NC 28574 Phone: I10-330-?784 pittn7ansoil @yahoo. cony August 30, 2012. Matt Lowder "Triangle Site, Design 4006 Barrett Drive ` Raleigh, NC 27609 Dear Mr. Lowder: The following is a•summary of the.soil. profiles taken at the proposed.Autozone site located on Hwy24 in the Cedar Point,area of Carteret County. The purpose of this evaluatioh,was to determine estimated,Scasonal .High Water Table-(SHWT) and to determine the infiltration rate of the soil. A hand auger'was used to obtain the soil profiles and to determine the SHVVT. Field techniques outlined in the North Carolina Laws and Rules..for 8,1 ge Treatment and Disposal Systems were used to determine soil texture, structure, consistency and soil wetness condition: Findings BORING'1 SHWT 36" KSAT DEPTH TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES Ili-(R. 0-20" LS GR NS. NE 10Y1R'311 5-10" 20-30" LS GR NS. NE 1 OYR 313 5-10" 30-36" LS GR NS, NE 2.5Y 5/41OYR 313' 5-10" 36-60" LS GR NS. NE 2.5Y 514 2:5Y 311 5-10 S BORING 2 SHWT 55" DEPTH TEXTURE STRUCTURE MINERALOGY- MATRIX 0-6'" LS GR 'NS. NE 10Y1R'311 6-12" LS GR` N5. NE 10YR 414 12-55" LS GR NS. NE 2.5Y 614 55-" LS GR NS. NE 2.5Y 614 KSAT MOTTLES MOTTLES "HR. 5-10" 5-10" 5-16" 2.5Y 712 IOYR 518 5-10" SATURATED BORING.3 SHVVT >60" AT 40" KSAT DEPTH TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES MOTTLES "HR. 0 6" LS GR NS..NE' 10YIR 413 6-12" LS GR NS: NE 10YR 5!6 5-10" 12-66" LS GR NS. NE 2.5Y 614: 5-10" BORING SHVVT 36" KSAT ,DEPTH TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES' MOTTLES '"HR. LS GR NS-NE 10Y/R 4l3 5.10" 6-12" LS GR NS. NE ,10YR,516 '5-10" 't2-36" LS GR NS.NE 2:5Y614 5-10 NS. NE 36• CS GR 2:5Y 6I4 2.5Y 7!2 10YR5I8. 5-4. BOG5 SHVV RINT>60" • KSAT. DEPTH TEXTURE STRUCTURE MINERALOGY MATRIX MOTTLES. MOTTLES "HR. 0-12" LS GR NS. NE i0Y1R 413 5-10"" NS: NE �12-18". LS GR 10YR 5/6' 5-10" 18-30" LS GR. W. NE '2.5Y &4 5-10" 30-60+ LS GR NS. NE 2.5Y 6P 5-10'' SHWT was determined by the'indication.of colors of'chroma 2 or -'less utilizing.a Munsell.Soil ,color'Chart at >2% off,soil,volume in mottles.or matrix of a horizon or horizon subdivision-. If you have any questions, please feel free to.contact me.at.(91.0).330-2784. Thaiik you. Respectfully, SO!( �S�p SC' G� �.. R. IIaywood Pittman, LSS t4 `,c�T75 ' !! I a INFILTRATION BASIN ANALYSIS FOR PHASE It AND 2008 PROJECTS Formula FILENAME: S:IWQSlexcel Sp readsheets\INBASIN1121018 User in ut PROJECT NUMBER: SW8 121018 Current Date 02-Nov-12 PROJECT NAME: AutoZone - Cedar Point Original Run Date: 10/31/2012 DRAINAGE BASIN: White Oak I REVIEWER: icsb RECEIVING STREAM: Boathouse Creek CLASS: SA;HQW Index No.: 20-31 If ORW, is site within the 575' AEC? Y N RULES ("2008" or "Ph2") 2008 (Use a comma {') before entering 2006) PROJECT AREA 2.66 acres Overall DA 45740 sf = 1.05 acres as7ao sf (reduce overall DA by -previously -permitted BUA amount) DA for Proposed BUA o DA for Prev.Permitted BUA sf (assume DA = previously permitted BUA) IMPERVIOUS AREA CALCULATION Previously BUILDINGS PARKING/ASPHALT CONCRETE OrFSITE OTHER/FUTURE I Total Overall % IMPERVIOUS, 1= New BUA % impervious = Ex, BUA % impervious = VOLUME CALCULATION Previously permitted BUA Design Storm Previously permitted BUA volume 1 yr. 24 hour precipitation depth (inches) Predevelopment C value from consultant 1 yr. 24 hr. Pre -development volume _ 1 yr, 24 hr. Post -development volume 1.5" volume for New BUA 2008 Design Volume Phase 2 Design Volume SURFACE AREAS / ELEVATIONS! VOLUMES BOTTOM TOP/BYPASS VOLUME PROVIDED 956s.75 SOILS INFORMATION ELEVATION OF SEASONAL SOIL TYPE REPORTED INFILTRATION Time to Draw Down 10 YEAR STORM (WAIVE BYPASS & VFS) Runoff depth for 10 yr 24 hr storm, inches Volume of 10 yr. 24 hr storm = Volume infiltrated in 24 hours = Remaining volume to store = BUA BUA at dill. DS C value 7315 1 24569 0.98 1894 0.95 0.95 0.95 33778 0 Cc= 33778 Pre Rv 73.8% 0.05 73.8% 0.05 0.00 inches 0 cf 3.66 698 cubicfeet 9970 cubic feet 4086 cubic feet 9272 cubic feet 4086 cubic feet Elev. (ft) Area, s ft Inc. Volume Acc. Volume 22.00 2,665 -29315 -29315 #VALUEI #VALUEI 24.50 4,990 #VALUEI #VALUE! cf Est Rv 0.71 I' or 1.5' from NOAA chart does not include exis HIGH WATER TABLE 195 fmsl Wando Sand RATE 5 in/hr 8A hours 3.66 from NOAA chart J 9970 CF 13325 CF, at T=1 day, V= (2 x k x AI -3355 CF OK? YES