Loading...
HomeMy WebLinkAboutSW8980829_COMPLIANCE_20100308STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SW �9�(iS�aiq DOC TYPE ❑CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE �lilD7�3U� YYYYMMDD Beverly Eaves Perdue Governor March 8, 2010 WDENR North Carolina Department of Environment and Natural Resources Division of Water Quality Coleen H. Sullins Director Roger Harper, Vice President of Development Southern Assisted Living, Inc. 10003 Main Street Chapel Hill, NC 27514 Subject: NOTICE OF INSPECTION Carolina House/Southern Assisted Living of Morehead City Permit No. SW8 980829 Carteret County Dear Mr. Harper: Dee Freeman . Secretary On February 3, 2010, Vincent Lewis of the Wilmington Regional Office of the Division of Water Quality (DWQ) inspected Carolina House/Southern Assisted Living of Morehead City in Carteret County to determine compliance with Stormwater Management Permit Number SW8 980829 issued on January 14, 1999. DWQ file review and site inspection revealed that the site is not compliant with the terms and conditions of this permit. Please find a copy of the completed form entitled "Compliance Inspection Report" attached to this letter, which summarizes the findings of the recent inspection. As indicated in the attached inspection report, the following deficiencies must be resolved: 1. The holding pond pump is not functioning allowing stormwater runoff to bypass the infiltration basin. Please inform this Office in writing before (April 12.-201:0, of the specific actions that will be undertaken and the time frame that will be required to correct the deficiencies. Failure to provide the requested information, when required, may initiate enforcement action including the assessment of civil penalties of up to $10,000 per day. If a written plan of action is not submitted to this office by April 12, 2010 then DWQ staff will re -inspect the site and issue a Notice of Violation if the listed deficiencies have not been addressed. Please be reminded that if any ownership or name change has occurred it is the permittee's responsibility to notify this office in writing. If you have any questions please contact me at the Wilmington Regional Office, telephone number (910) 796-7215. Sincerely, Chris Baker Environmental Engineering Enclosure: Compliance Inspection Report GDSlcsb: S:IWQSISTORMWATERIINSPECT1980829.mar10 cc: John Hennessy-NPS-ACOU WiRO Files DWQ Central Files Wilmington Regional Office One 127 Cardinal Drive Extension, Wilmington, North Carolina 28405 NorthCarolina Phone: 910-796-72151 FAX: 910-350-20041 Customer Service: 1-877-623-6148 �aturaClr� Internet: www.ncwaterquality.org Compliance Inspection Report Permit: SW8980829 Effective: 01/14/99 Expiration: County: Carteret Region: Wilmington Contact Person: Keith Stark Title: Project Manager Directions to Project: Type of Project: State Stormwater - Infiltration System Drain Areas: 1 - (Spooner Creek) (03-05-03) ( SA;HQW) On -Site Representative(s): Related Permits: Inspection Date: 02/0312010 Entry Time: 09:30 AM Primary Inspector: Vincent Lewis Secondary Inspector(s): Christopher Baker Reason for Inspection: Routine Permit Inspection Type: State Stormwater Facility Status: ❑ Compliant ® Not Compliant Question Areas: State Stormwater (See attachment summary) Owner: Unknown Wiro Project: Carolina House 1 Southern Assisted Livin Exit Time: 10:00 AM Phone: 910-794-1341 Phone: Phone: Inspection Type: Stormwater Page: 1 i � r Permit: SW8980829 Owner • Project: Unknown Wiro Inspection Date: 02/03/2010 Inspection Type: Stormwater Reason for Visit: Routine Inspection Summary: File Review Yes No NA N Is the permit active? ® ❑ ❑ ❑ Signed. copy of the Engineer's certification is in the file? ®❑ ❑ ❑ Signed copy of the Operation & Maintenance Agreement is in the file? ®❑ ❑ ❑ Copy of the recorded deed restrictions is in the file? ®❑ ❑ ❑ Comment: Built Upon Area Yes No NA NE Is the site BUA constructed as per the permit and approval plans? ®❑ ❑ ❑ Is the drainage area as per the permit and approved plans? ®❑ ❑ ❑ Is the BUA (as permitted) graded such that the runoff drains to the system? ®❑ ❑ ❑ Comment: SW Measures Yes No NA NE Are the SW measures constructed as per the approved plans? ®❑ ❑ Cl Are the inlets located per the approved plans? ®❑ ❑ ❑ Are the outlet structures located per the approved plans? ®❑ ❑ ❑ Comment: Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ❑ is ❑ ❑ Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ ❑ ❑ ® Cl upon request? Comment: The holding pond pump isn't working so that the stromwater runoff is discharging from the holding pond without being treated. Other Permit Conditions Yes No NA NE Is the site compliant with other conditions of the permit? ®❑ ❑ ❑ Comment: Page: 2 State Stormwater Inspection Report General Project Name: 'f 44P- .SJ �c Permit No: SW8 c� r(3 pj Expiration Date: 1 y,665 Contact Person: `Jyjr) r)5� �i� -tt Phone Number: Inspection Type: Inspection Date: �Ol d Time [n: ` ' ja Time Out: U: Qd Current Weatlier: t CU o r`� � Recent Rain (Date)?, +- " tiI6 Rain �- --I in Location Facility Address / Location: City: Ur zip: County: GY �. Lat: 0"N Long: - "W Permit Information Rule Subject to (circle one): 1988 Coastal Rule 1995 Coastal Rule 2008 Coastal Rule Session Law 2006-246 Goose Creek High Quality Waters Outstanding Resource Waters Density (circle one): High (HD Low (LD) Stop water Best Management Practices (BMPs) (insert number of each): 7Wet Ponds Infiltration Basins infiltration "Trenches LD Swales Stormwater Wetlands Dry Ponds Bioretention Permeable Pavement Sand filters (circle one) Open Closed Cistern Level Spreader/Filter Strip Other (specify): File Review Yes, No NIA NIE 1. Is the permit active? 2. Signed Engineer's Certification on file? V. 3. Si ned Operation and Maintenance agreement on file? 4. Recorded Deed Restrictions on file? Site Visit- Built Hnnn Area IRIJA) Yes. No NIA NIE 5. BUA is constructed and consistent with the permit requirements? 6. BUA aspermitted) is graded such that the runoff drains to the system? (high density only) 7. Drainage area is consistent withpermit? (i.e. no un emtitted drainage to the SW BMPs l 8. Drainage area is stabilized? (to reduce risk of sedimentation to the SW BMPs) Site Visit: Stormwater BMPs Yes," No NIA N1E 9. Stortmvater BMPs are located 2er the approvedplans? 10. Stormwater BMPs have dimensions e . length, width, area matching the approvedplans? 11. Stormwater BMPs are constructed per the approvedplans? Site Visit: Oneration and Maintenance Yes No NIA NIE 12, Access points to the site are clear and well maintained? 13. "Trash has been removed as needed? 14. Excessive landscape debris(grass clippings, leaves, etc is controlled? 15. Stormwater BMPs being operated and maintained as per the pernut requirements? 16. Inspection and Maintenance records are available for inspection? (high density only, 1995 - resent only) Site Visit: Other Permit Conditions Yes No N/A NIE 17. Is the site compliant with other conditions of the ennit? Site Visit: Other Water Quality Issues Yes No NIA NIE 18. Is the site compliant with other water quality issues as noted during the inspection? State Stormwater Inspection Report, Version 3.0_3-09 Page 1 of 2 WET DETENTION O & M Inspection Checklist INLETS and FOREBAY 1. Inlets are located per the approved plans: ❑ ❑ ❑ 2. Inlet device (swale or pipe) is free of damage, clogs or erosion: V ❑ ❑ ❑ 3. Forebay berm is in place and without erosion: [I] El® El 4. Forebay is free of excessive sediment: ❑ ❑ ® ❑ SIDE SLOPES AND BANKS 5. Vegetated slopes are 3:1 or less: ® ❑ ❑ ❑ 6. Banks are stable and free of erosion or bare soil: © ❑ ❑ ❑ 7. Slopes or berms are free of woody vegetation: ❑ ❑ ❑ ❑ 8. Free of muskrats or beaver activity:] ❑ ❑ ❑ 9. Grass is being maintained and mowed (not scalped) as required: ❑ ❑ ❑ PERIMETER AND MAIN BAY 10. Vegetated shelf is 6:1 or 10:1 as permitted and properly vegetated: © ❑ ❑ ❑ 11. Algal growth covers less 50% of the area: ® ❑ ❑ ❑ 12. Cattails, phragmites or other invasive plants cover less than 50% of the basin surface: 4 ❑ ❑ ❑ 13. Main treatment area is free from excess sediment accumulation:] ❑ ❑ ❑ OUTLETS 14. Swale or emergency outlet bypass is in the correct place and is in good condition: 0 ❑ ❑ ❑ 15. Drawdown device is correctly sized free of damage or clogging: ❑ 1Z ❑ ❑ 16. Orifice size matches the approved plans ❑ ❑ 0 ❑ 17. Outlet is free of erosion or other signs of damage: ❑ ❑ ❑ ❑ 18. Trash rack is installed ❑ ❑ 1 ❑ 19. Vegetated filter is in place (if applicable) ❑ ❑ © ❑ 20. Relative elevations match approved plans © ❑ ❑ ❑ 21. Fountain pump (if permitted) is less than or equal to the maximum allowable size: ❑ 0 ❑ ❑ V3.3_49 I State Stormwater Inspection Report IV�I�f� 15 dlrC 4r�in� Goy, ¢etc o�d�J PbYi5Y4e some of the pictures taken during the site Compliance Status ❑ Compliant v Non -Compliant Letter Sent (circle one): Yes No Letter type: CEI NOV NOVRE Other Date Sent: Reference Number: Inspector Name and Signature: 1 (r p)_'J1J 1.,.a ,av Date: '— .'2 -o State Stormwater laspeclion Report, Version 3.0_3-09 Page 2 of 106 Compliance Inspection Report Permit: SW8980829 Effective: 01/14/99 Expiration: Owner: Unknown Wiro Project: Carolina House / Southern Assisted Livin County: Carteret Region: Wilmington Contact Person: Keith Stark Directions to Project: Title: Project Manager Type of Project: State Stormwater - Infiltration System Drain Areas: 1 - (Spooner Creek) (03-05-03) ( SA;HQW) On -Site Rep rose ntative(s): Related Permits: Inspection Date: 05/03/2010 Entry Time: 11:00 AM Primary Inspector: Christopher Baker Secondary Inspector(s): Christopher Baker Reason for Inspection: Follow-up Permit Inspection Type: State Stormwater Facility Status: ■ Compliant ❑ Not Compliant Question Areas: State Stormwater (See attachment summary) Exit Time: 11:30 AM Phone: 910-794-1341 Phone: Phone: Inspection Type: Stormwater Page: 1 Permit: SW8980829 Owner - Project: Unknown Wiro Inspection Date: 05/03/2010 Inspection Type: Stormwater Reason for Visit: Follow-up Inspection Summary: Built Upon Area Tes No NA N Is the site BUA constructed as per the permit and approval plans? ■ ❑ ❑ ❑ Is the drainage area as per the permit and approved plans? ■ ❑ ❑ ❑ Is the BUA (as permitted) graded such that the runoff drains to the system? ■ ❑ ❑ ❑ Comment: Operation and Maintenance Yes No NA NE Are the SW measures being maintained and operated as per the permit requirements? ■ ❑ ❑ ❑ Are the SW BMP inspection and maintenance records complete and available for review or provided to DWQ ■ ❑ ❑ ❑ upon request? Comment: Page: 2 6 Reterition Pond Serylces, Inc.. Sperm 1n A0"es dwgwuc.M WOUMd OAA7 +aa Stormwater Maintenance and Inspection Report Cuatomer Name: CO3kn(r YVAf OA-1 1r,, e t.cl Ci 41 t . M [J Facility #: Inspection (Monthly or Annual): gc r1_ 12 gin Vq Water Level (High, Normal, Low): Date: Weather Conditions: 6D)0D� SITE CONDITIONS COMMENTS Yes No WA re sediment basins stabilised and functioning ❑ ❑ roe Are diversion ditches and swales stabilized and ❑ ❑ functioningproperly? Are there any areas of erosion present In pond ❑ ❑ areas ? Do any areas require re -vegetation? ❑ ❑ Is the forebay separator(s) functioning properly? ❑ ❑ d Are all pipes and hard structures functioning properly? ❑ ❑ Is there any sediment aocumulation In the pond or ❑ ❑ B/ outlet box? there any nonspecific Items or Issues that need be ❑ ❑ C�1An. "- aV`' S v a4 r K ► o p . l PcAL oP y flddressed7 [Ai're �T11t wp}e.t w Uwl Ws� there any additional comments regarding this ❑ ❑ ❑ na rUV%K"J•y o c J te? MAINTENANCE PERFORMED COMMENTS YES NO WA pond area(s) free of trash and debris? ❑ ❑ � r rf,"JA Was the grass cut In all pond wea(s)? ❑ ❑ Are the trash rack and draw down pipe on the ❑ ❑ 'd outlet box dear? Does the pond need to be treated for aquatic ❑ ❑ EL vegetation andlor algae? Did you conduct an annual depth plot of the ❑ nd(s)? NIA Technician Signature: lclan Name (Print)*. AVOLIS ENGINEERING, P.A. P,O, Box 15564 • New Bern, North Carolina 28561 • (252) 633-QQ68 July 15, 2009 Ms. Linda Lewis Environmental Engineer Division of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405 Re: Engineer's Certification For Stormwater Permit Renewal, SW8980829, Carolina I-iouse/Southern Assisted Living, 107 Bryan Street, Morehead City, NC Dear Linda: Enclosed please find the above -referenced certification. Repairs were completed during the certification process by Retention fond Services. Should you have any questions, please do not hesitate to give me a call. Sincerely, 4 i . A v oi is, PE Pre ide t (Y V A &Vd , ("0 &W) BY: 1U f 6 2009 Stormwater Permit No. SW8980829 Wet Pond/Pump/Infiltration System Carolina House/Southern Assisted Living Morehead City Carteret County 1. The drainage area to the system contains approximately the permitted acreage. 2. The drainage area to the system contains no more than the permitted amount of built -upon area. 3. All the built -upon area associated with the project is graded such that the runoff drains to the system. 4. All roof drains are located such that the runoff is directed into the system. 5. The bypass structure elevations are per the approved plan. t6. The bypass structure is located per the approved plans. �,47. A trash rack is provided on the outlet/bypass structure. 8. All slopes are grassed with permanent vegetation. 9. Vegetated slopes are no steeper than 3:1. 10. The inlets are located per the approved plans and do not cause short- circuiting of the system. 11. The permitted amounts of surface area and/or volume have been provided. 12. All required design depths are provided. 13. All required parts of the system are provided. 14. The required system dimensions are provided per the approved plans. Joseph C. Avolis, PE Avolis Engineering, PA PO Box 15564 New Bern, NC 28561 (252)633-0068 (252) 633-6507 (Fax) nnrnr. NALULM dE Q ratv�V D�r�tr�G` �irV-TIFIUTrJb"A as THE JOHN R. McADAMS COMPA� - CONSULTING ENGINEERS fOffi WATER POST OFFICE BOX 14005 E C E I V E RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709 (919) 361-5000 FAX (919) 361-2269 NOV 161998 LETTER OF TRANSMITTAL PROD 42i €tn _Bzq To: Linda Lewis Date: November 13, 1998 DENRIDivision of Water Quality 127 Cardinal Drive Extension Wilmington, NC 28405-3045 "' FEDERAL EXPRESS" Re: Southern Assisted Living - Morehead City Job No.: SAL-97040 am sending you the following item(s): COPIES DATE NO. DESCRIPTION 1 Revised Permit Application 3 Revised Sets of Civil Plans 1 Revised Calcs, Soil Report These are transmitted as checked below: ❑ As requested ® For approval ❑ For review and comment Remarks: ❑ For your use El Copy to: Signed: Jim Anderson, PE Project Manager TIE JOHN R. MCADAMS COMPANY, INC. CONSULTING ENGINEERS POST OFFICE BOX 14005 RESEARCH TRIANGLE PARK, NORTH CAROLINA 27709 (919) 361-5000 FAX (919) 361.2269 1 November 13, 1998 E C E I V E NOV 1B1998 Ms. Linda Lewis PROJ # '14vU szq NCDENR Wilmington Regional Office 127 Cardinal Drive Wilmington, North Carolina 28405 RE: Morehead City Carolina House (Southern Assisted Living, Inc.) Dear Ms. Lewis: Enciosed is our response to your comments dated October 31, 1998. Our response follows your letter to us. 1. The wet pond has been reduced in size to reduce its impact on the wetlands. The pond could not be totally relocated out of the wetlands (the size/storage is dictated by the ground water level). However, the total impact to the wetlands has been reduced by 15 % (5357 SF). This is the minimum impact we could design into the system. 2. The complete soils report is enclosed, which includes all items you require. 3. The impervious area should be l .l 1 acres; the permit application and plans have been adjusted. The new application sheet is enclosed (please insert into the old application). 4. The distribution mechanism is shown on the plan and in detail.. 5. The building dimensions are shown on the site plans. 6. The vegetated filter detail is shown on the detail sheet. Please call if you have questions. We look forward to receiving our permits soon, and we appreciate your help during this process. Sincerely, THE JOHN R. McADAMS COMPANY, INC. Jim Anderson, PE Project Manager INFILTRATION BASIN ANALYSIS FILENAME: S:1WQS11NBASIN1980829.WK1 PROJECT NAME: Carolina House Souther Assiste PROJECT 4: 980829 DATE: Living DRAINAGE BASIN: Spooners Creels CLASS: SA REVIEWER: art SITE AREA: 139827.6 SF DRAINAGE AREA: 76230 SF IMPERVIOUS AREA CALCULATION BUILDINGS 29310 SQUARE FEET PARKING/ASPHALT 13858 SQUARE FEET SIDEWALKS 2315 SQUARE FEET OTHER Covered porches, courtyard 2869 SQUARE FEET TOTAL 48352 SQUARE FEET % IMPERVIOUS= 63.4290962 % RV= .05 + .009 (1)= 0.62086187 ELEVATION OF SEASONAL HIGH WATER TABLE 17 FEET MSL REPORTED HYDRAULIC CONDUCTIVITY 0.16667 CF/HR/SF SURFACE AREA OF BASIN BOTTOM 4939 SQUARE FEET SURFACE AREA AT STORAGE ELEVATION 6500 SQUARE FEET BOTTOM ELEVATION OF BASIN 19 FEET MSL STORAGE ELEVATION 20.1 FEET MSL VOLUME / DEPTH / DRAWDOWN CALCULATION TOTAL VOLUME TO INFILTRATE 5916.038 CUBIC FEET VOLUME AVAILABLE IN POND 6291.45 CUBIC FEET DEPTH OF RUNOFF 1.034363 FEET TIME TODRAWDOWN 7,186782 HOURS MUST BE<120 COMMENTS Volume and drawdown are (not) within Design Requirements. 14-Jan-99 Y THE JOHN R. McADAMS COMPANY, INC. CONSULTING ENGINEERS POST OFFICE BOX 14005 RFSFARC}[ TRIANGLL PARK, NORTH CAROI,INA 27709 SOUTHERN ASSISTED LIVING BRYAN STREET AND BLAIR AVENUE MOREHEAD CITY, NC STORMWATER QUALITY CALCULATIONS SAL-97040 JULY 22, 1998 REVISED NOVEMBER 13, 1998 E C E f V E D NOV 16 1998 PRoJft SwG�OSZq IESS a f _ 4EAL 2495 � �t ., a�t 11r1�] I SOUTHERN ASSISTED LIVING MOREHEAD CITY, NC STORMWATER QUALITY CALCULATION BOOKLET General Description This booklet covers the stormwater quality calculations for the proposed Southern Assisted Living complex in Morehead City, NC. This project entails the construction of an assisted living center, as well as the associated parking areas and any other site amenities. "this site drains to Spooner Creek, which is tributary to Bogue Sound, both classified by the State of North Carolina as SA waters. Because of this designation, and the fact that this development is to exercise the high -density development option (development will exceed 25% impervious), the runoff from the first 1.5 inches of rainfall will be infiltrated into groundwater. No discharge of stormwater will take place for storm precipitation depths of 1.5 inches or less. The stormwater runoff from the impervious surfaces of this site will gravity flow into a normally wet holding pond at the southeast corner of the property. The normal pool of this pond is set at the seasonal high water elevation in the area; a lower normal pool would always flow over the weir or into the pump wet well. As the water level in the holding pond begins to rise above normal ' pool elevation, the excess runoff is pumped through a PVC force main to an infiltration basin at the northeast corner of the property. Sufficient storage volume is provided in both the wet holding pond and the infiltration basin to store the runoff from the first 1.5 inches of rainfall. When rainfall amounts exceed 1.5 inches, the storage volume in the wet holding pond may be exceeded or the infiltration basin may reach its capacity. If the storage volume in the wet holding pond is exceeded, the water will flow over a broadcrested weir spillway to a vegetated filter. The water will flow through the vegetated filter to an existing stormwater channel at the south property line of the site. Another possibility is that the infiltration basin may reach capacity before the rainfall ceases. In this case, a master pump override switch located in the infiltration basin will stop pump operations until the infiltration. basin is once again empty and ready for use. Calculations regarding this stormwater treatment system are included within this submittal, as well as a detailed soil investigation to determine suitability for infiltration, conducted by Mr. Wayne Ragland, Soil Scientist. Calculation Methodology • The runoff amount for the first 1.5 inches of rainfall was calculated using the SCS Curve Number method and the application of Directly Connected Impervious Areas (DCIAs). The use of DCIAs alleviates the shortcomings of the SCS CN method when applied to impervious sites and low rainfall depths. A volume greater than that calculated is provided in both the wet holding pond and the infiltration basin. The wet holding pond is designed to pass the ten -and fifty year storms safely over a broadcrested weir spillway. This runoff enters a 507 long vegetated filter channel that will convey the ten-year storm runoff at a velocity less than 2.0 feet per second. This channel discharges into an existing stormwater channel at the south property line of the site. • Rainfall depths greater than 1.5 inches also pass over the weir outlet device of the wet holding pond and into the vegetated filter. + The runoff from storms equal to or less than 1.5 inches in depth is stored in the wet holding pond and pumped to the infiltration basin through a 3" SCH 40 PVC force main by a Myers MW50 1/2 BHP submersible sewage pump operating at 1625 RPM. This pump is capable of passing solids up to two inches in diameter, and will pump the stored runoff at a rate of 92 to 122 GPM (depending on WSELs in the basins and the condition of the PVC force main). • The infiltration basin area has been tested and proven to have a hydraulic conductivity of at least 2.0 in/hr. The basin is situated to provide at least 2.0 feet from the bottom of the basin to the seasonal high water table. No bedrock or impervious soil horizons are within 3.0 feet of the bottom of the basin. • The entire treatment process (from pumping to infiltration) will take place within the required five-day time limit as established by the State of North Carolina. THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 L� (919) 361-5000 Fax (919) 361-2269 A� jy .(` l—k7,,-96 PAGE OF J R WA JOB NO. f — O V DATE —`9BY VW CHECKED BY CLIENT PROJECT SUBJECT - - - �- - TO VT _ ycw,� :'PAD �2,(!20 - - - ----- tf ii _ yy In�u,w4 CTzx_ a - 1, oo - - - --._- -- Q 2) jf'A c2- co I, -TO )NF1L�T A-Tic>j --f �i lM CAS) :- -,--- _--rumP__5sh.� F_ '�•�J _�M�h(,,_ INS)- --� - , to -- -- -- .. �✓t ! ►.1, f-� p 4.��vt i.4 L Ccr�L�.+�.h v, itil � - � . n ��'NQ � i ID15TAN�TTor4 io 1 Ikre� �'F - Z.0 FT. RAMP '((M� _ ,5;.�o Va,�E) Y�vP�,i' VISE ---- - - -"w 1 (_ C e�---- . - --- - —_ _N��► pro Ems' D R,i"? CFF ' i I THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Aq Research Triangle Park. North Carolina 27709 — -1 -- 5000 Fax (919) 361-2269 I 11` I12 jC_> PACE OP J R MCA JOB NO. O DATE '2Z _95 BY Pf C CHECKED BY CLIENT SUBJECT I ECT I (Date) TIIE JOIIN R. INIcADANIS COMPANY, INC. P.O. Box 14005 �•; Research Triangle Park, North Carolina 27709 ��--- (9191 361-5000 Fax (919{ 361-2269 //���` � PAGE J R McA JOB PIO. &ZRIQ0 .y DATE I—sZ92, By ^I�1:1 CHECKED BY CLIENT PROJECT SUBJECT �}3 bi �� 11 s� r z2 OF (Dale) THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 �;-- Research Triangle Park, North Carolina 27709 -- (919) 361-5000 Fax (919) 361-2269 PAGE OF J R McA JOB NOe/� - I2 CAO - DATE - r - - BY "' v CHECKED BY (Date) CLIENT PROJECT SUBJECT 42 s 3 --------.--__.__.-.-----�,---_ F _� _ - _ THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269 �-.s �/ � PAGE J R McA JOB N0. tf�V� {� DATE 1w BY P `�� CHECKED BY — CLIENT PROJECT SUBJECT OF (Dale) THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 " (919) 361-5000 Fax (919) 361-2269 { PAGE OF J R McA JOB NO. DATE 'r 1� BY _ I?A� CHECKED BY (Date) CLIENT y PROJECT SUBJECT 2, GIB GNt� L O&-f + = ) o FT. = d% 6L*T) \jUMrF- 1Niw SPu_ Rzc Cam - -fo 4-jRV-MA-Tic*J SASS., [Al 15,5 it (0 �� U"b,.1cj INS ►-+- SP�z-i-?M CI+-Aivr THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 --= Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269�/ l '1 �1 f"" I2I— {�j'PAGE OF J R McA JOB NO.-� 1DATE . ! -ZI A,-3,—BY D CHECKED BY (Date) CLIENT PROJECT SUBJECT S�[:IZM JT1aJ 106LnA-j1c:rJ S� STWA Rom _Ap-jwluG,zA%nn# oo - - - - - --- -; ��-1-�a,+a+� . - �- r - � . _-. � t,t►�-OFF �.�.c��� �.���_ �_. � '�Er-� �j . iQ {�,..5 - - --. _� . u5Ca5 <­C%Le' Su W1tN u I UO L,-AV`A'-i F11,F_ __ Ate,jt 1AR tiLatS1MF �lo„IS Ito T i . TL = � � � _ C�� � ��1� Ci�t�,►-�L-� /�ea�, '� mid )M � =1<<.�,,c� �r�� CFS 000 —�o ~1 ppp THE JOHN R. McADAMS COMPANY, INC. �.`.P.O. Box 14005 -, Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269�h� a PAGE J R McA JOB NO. �' 11CAQ DATE �1 BY r CHECKED BY_ CLIENT PROJECT SUBJECT Ilk Qy, - D,ZS Z [x ro ' Z , �--i 3,14 ,t T _ 43.Go�*A ip, = a?"L:, m t 0 r �o`It�= B,ZcFS 2?..6�,r�. OF_ (Dale) f o f D A- C -ucs , A-0,F, V► T45 t,�O- k. Pcct. 6e-ATioJ IS � l5100 va.u-kE Redo = 559CF ppo"'W lj Pav �33 CF?'o a- `Z.D -10 VNILI. PF7kc-4j R,tMp%w-. SIC--Tel'A�`` �J � -�FA---e C',O kr7Y-rtHe 4 A'-Rt�r, c�.l JUu� m -13 t 1 c� t� 6) �,1'z p IMpmv,uvis 50L 0xI-a7_1 THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269trv. !1 I I PAGE J R MCA JOB NO. 11C41P DATE -7—Z 1 BY CHECKED BY _ alENT PROJECT SUBJECT OF (Date) �w VI;6 k.' vff'k6;�el' . �M4Q�MuL Ccr�0�V1 iL( = Z• 4 t,� f Ham: �.Mif..a��,�.r�1 Nato f � �t1�T� ---� __QaWlGl.'O to �--. i�C� 112- ' 4 i I CF_ - 162'_ - ' 101 _ - -- C� M�x._5�l�--��---['��+►� - . S- S��q.�_�1,110� - �v3`�(oc.F_I Q..__---� I THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269 iv� 11! 13�5 1I PAGE OF J FlMcA JOB NO. 0 DATE 1 -2-1 — 922 BY bAe--' CHECKED BY (Date) CLIENT PROJECT SUBJECT � D�� �t�E FAR- I �Fi��1�C�r�J BAS�r�i - - - • 3 I I 1NF1L17 c>-1 CAMC 14 --= ?�•qZ eAt-' pAq . i T, ME &f- 1 t�ri+.1Z-z,4TiaJ - = _- - - ' r� = p,?jZ opvjlS _ I DFi}C--tJ Pur.1P�►.�C. C-�'h'1 -- ffi`5Fk7tt(-�4 WCO-�7- 6Ae--.;,7 l�OnCIJS CAD WcPiP_,Y=_]00 ' I►J k►-Ya Pc�O - ��.(��. C of R.+tP r Irk 1ri" W-�� 0r1 ��TiRL PAS lid THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, !North Carolina 27709 ��� (919) 361-5000 Fax (919) 361-2269 N _, I �/ PAGE J R McA JOB NO. 0 DATE BY D ` -- CHECKED BY_ CLIENT PROJECT SUBJECT OF (Date) THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269 1l — l' j-95 y PAGE OF J R McA SOB NO. � DATE —�^ BY CHECKED BY (Date) CLIENT PROJECT SUBJECT i� 1 cf— Rz_" P�vE4_= 1q0Lr- pv'/_1 f�ki. o . ID . I 190 I i , { I I r .� i HOC I -_ _5-8z;cb��..__ - - — Tp OZ. D {� + tj I THE JOHN R. McADAMS COMPANY, INC. P.O. Sox 14005 Research Triangle Park, North Carolina 27709 '--'- (919) 361-5000 Fax (919) 361-226Q ��, Q�'� Ara! 11 13-�� PAGE OF J R McA JOB NO.,�L�- ! '(O _ DATE _VVY�vL!L/`��,�� BY PAC CHECKED BY (Date) CLIENT PROJECT SUBJECT '?LAMP,. L �MAt4z; F'e5T- iCAE12-2 F _TVA qZ-- cFM --e, 11,6 6 Fs 'FDA —to--'R-A"+-P (0 c,F_ C ! - l,�Fri��z�ti��J _Si CA�tq) cam. - --- ' - V, T C I ; IN i�-air-Y�: _(�-�o- 6cc.�S- -lZ,� , ��s _ �I•�c:�-= _.IW+�,�, S1�T . � _ 'l�- ��,,�.�� -- ` w� � ._1-._.1►����----�.o�-►--U_. ��.,o_Y��s - �.o._E�6..-.I2,00 �--;r4 .-------- -- �czu0 . M_�`��? f�t� jLi �E Sup � ; S�ti,c.- L� # Lc��� —� �►-� _j rvFt�thL�vJ .—....: t ur.-P 0'1u, kmk,iJ `Cif p�cP5 , To - I r THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triang4e Park, North Carolina 27709 (919) 361-5000 Fax (919)361-2269 'f �p PAGE OF J R McA JOB ND. q1040 DATE + ` BY CHECKED BY (Dale) CLIENT PROJECT SUBJECT �M IG ('F P' —PIMP Cp6ewmc7d -- - a 2.0 - � wVTG� ?uHP'pJ _We CL,(Z,Dt - 1�l �P Ind eweL' , o Ovev_p Ve!5;' -----Solzt�__'.�-. _. -- --- — ----- — - - ---"_ ----- -- - -- SriCE V6DI ► crA tip I �� __1'�a � �jo ; ass..-_C�cr, i•��� _U_�4 ,-eo _�ll,t�� � �___.- THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269 ��yy��n �j �{ PAGE OF J R McA JOB NO.�r1�� DATE `-Zz 1� By CHECKED BY t (Date) CLIENT PROJECT SUBJECT 1Q of Ice . ELN TA a-&, -- --� -- ---- -- ----- °IP9�S L . � 5 � �,+kr,l-;�►,r W►fi�}- 5��..aRe.D 8 T�1K-! Slac� i:,t;�rst��G �'�f THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-2269 � PAGE OF J R McA JOB NO�}— ` `Q40 DATE BY CHECKED BY (Date) CLIENT PROJECT SU9JECT - a 'irV-Z -- . �l{/���• �[,/r � Ire 1�= IY/ - _ _- _ _ • f F Ndf a� �l THE JOHN R. McADAMS COMPANY, INC. P.O. Box 14005 Research Triangle Park, North Carolina 27709 (919) 361-5000 Fax (919) 361-22669 n,, GGCCJ�r PAGE OF J R McA JOB NO. DATE -1-2z _a � BY DA , CHECKED BY J (Date) CLIENT PROJECT SUBJECT Dirt • �(� ', ���� �JYkL�;--- W � � ins ! D'� . _ C1�.� i .J rv---- - VAt-hk6- X-hSS Itn,l C D.olvo 0.�� �•y8--- D,�p I r ! I _ -0 rd�a- -- -V.�DI� 1 h �� 1- -.D �o�_...__.._.. U �o I,-7q e— _ ,S FPS ' Ut-wC, Veg. Filter 10 year storm Worksheet for Trapezoidal Channel Project Description Worksheet Vegetated Filter below Pond Spillway Flow Element Trapezoidal Channel Method Manning's Formula Salve For Channel Depth Input Data Mannings 0.060 Coefficient Slope 1.3200 % Left Side 3.00 H : V Slope Right Side 3.00 H : V Slope Bottom Width 5.00 ft Discharge 8.20 cfs Results Depth 0.66 ft Flow Area 4.575 ft2 Wetted Perimeter 9.15 ft Top Width 8.94 ft Critical Depth 0.40 ft Critical Slope 7.7205 % Velocity 1.79 ft/s Velocity Head 0.05 ft Specific Energy 0.71 ft Froude Number 0.44 Flow Type Subcritical Title: untitled c:lhaestacAfmvAwork150197040.fm2 The John R. McAdams Company, Inc. 11/13198 4,33 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury. CT 06705 USA (203) 755-1666 Veg. Filter 10 year storm Cross Section for Trapezoidal Channel Project Description Worksheet Vegetated Filter below Pond Spillway Flow Element Trapezoidal Channel Method Manning's Formula Solve For Channel Depth Section Data Mannings Coefficient 0.060 Slope 1,3200 % Depth 0.66 It Left Side Slope 3.00 WV V Right Side Slope 3.00 H : V Bottom Width 5.00 ft Discharge 8.20 cfs OD 0.66 n -I- V:1L H:1 NT S Title: untitled Project Engineer: Barry Fagnano c:YhaostadtfmMwork1se197040.fm2 The John R. McAdams Company, Inc. FlowMaster v6,0 (614bi 111131% 4;35 PM D Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 0670E USA (203) 755-1666 Page 1 Holding Pond Water Quality Pond Design Sheet Project Name: SAL - Morehead City Designer: D.A. Clark Job Number: SAL-97040 Date: 11/13/98 Contour (feet) Stage (feet) Contour Area (SF) Average Contour Area (SF) Incremental Contour Volume (CF) Accumulated Contour Volume (CF) 10.0 0.0 822 11.0 1.0 1514 1168 1168 1168 12.0 2,0 2268 1891 1891 3059 13.0 3.0 3080 2674 2674 5733 14.0 4.0 3950 3515 3515 9248 15.0 5.0 4878 4414 4414 13662 Storage vs. Stage 16000 14000 12000 y = 1120x1.5231 v 10000 R2 = 0.9977 rn 8000 N 6000 4000 2000 0. 0.0 1.0 2.0 3.0 4.0 5.0 6.0 it Stage (feet) KS = 1120 b = 1.5231 Page 1 Holding Pond Calculations of Runoff Volume required for storage The runoff to the pond for the 1" storm detention requirement is calculated using the SCS curve number method. Impervious areas that directly enter the pond are counted as Directly Connected Impervious Areas (DCIAs). No infiltration calculation will be provided for these areas. Areas not directly connected will be accounted for in a composite curve number. From SCS Soils Survey map, predominant hydrologic soil type = A Using basic SCS runoff methodology, with no adjustments made to initial abstractions (0.2'S and 0.8*S), Impervious Area, directly connected (DCIA) = 1.11 acres @CN= 98 Other areas draining to pond (not DCIA) = 0.64 acres @CN= 39 Runoff from DCIAs =_> Precipitation amount = 1.5 inches S = 0.204 inches (calculated) Q* = 1.280 inches (calculated) Runoff volume = 5158 CF Runoff from non -connected areas ==> Precipitation amount = 1.5 inches S = 15.641 inches (calculated) Q" = 0.000 inches (calculated) Runoff volume = 0 CF Therefore, total runoff from precipitation in question = 5158 CF This amount of runoff must be stored in the pond above normal pool elevation, and be released in a period of two (2) to five (5) days, by an inverted PVC siphon, the invert end of which is set at permanent pool elevation. Page 2 Holding Pond Calculation of depth required for runoff storage pool (above normal pool) Normal pool depth (above invert) = 2.00 feet Storage provided at permanent pool depth = 3219 CF (calculated) Total storage required for normal + storage pool = 8377 CIF Stage (above invert) associated with this storage = 3.75 feet Therefore, depth required above normal pool for storm storage = 1.75 feet 20.97 inches Therefore set crest of principal spillway at stage = 4.00 feet and EL = 14.00 feet At principal spillway crest, storm pool storage provided = 6033 CF Page 3 Infiltration Basin Stage -Storage Function Project; SAL - Morehead City; SAL-97040 Contour feet) Stage feet) Contour Area SF) Average Contour Area (SF) Incremental Contour Volume (CF) - Accumulated Contour Volume (CF) 19.00 0.00 4939 20.00 1.00 6500 5720 5720 5720 20.50 1.50 6950 6725 3363 9082 Storage vs. Stage 10000 9000 8000. y = 5719.5x1.iaos Fie = 1 7000 u 6000 o� 5000 o 4000 (n 3000 2000 1000 0. 0.00 0.50 1.00 1.50 Stage (feet) KS = 5719.5 b = 1.1405 M �F t✓�zhT+crJ Page 1 EL 00 O O O to ti W N In � O O O U O C r O co O O d invg70c (LIU O r N v N ,C � G n ° E E c a E C Q N (C7 COD N` N CU00Oo000Ac0LnMO C- M M M N O) h M C3 wi comc nOtl)MM'r .;r M N N O N v 0 N� v C 0 m ?, t O r r N qT (1] 1, CO O y� t 6 w r- Cfi v N r .- 0 o o CL n O v Cl) CD v .- C` CD E-0 N CO (D N N m CC) C, O (tea in T�N(pt`OCAN O (DCD(D"ta0Nt`.-COM U L l m O r r N M�r CC7 co w m (D= M f+ CO C( j M N r r- O O LL LL } 1- r- N m M o w M CO M a0 N cor M M (D 00 Ln a= CDrIi q�v9O(A 7 CT q q Nt O0M0M m L O r r CV M IT v 0 ti M m C- C- O vro N r O Cj O C C T C m U) T C H �. N N d N N co v M N N v 0 0 0) IT It N M CA I- Cf) O j/j V Ul l(] O Cl) r Q) O) O O r :3 m^ r N co N (D R co co tq C, C V) 4m7 0 Or N N MMto61-� Cep }.L h(DLO'TN r000 r En ICJ M CD co M co C-- co LC) Z3 0 M M V N LO 0 N CU 0 O IT M N r � .-. � CO Q•) f- UC lr') r h v N C U ) o0�-r N MM vCC)CD mZ CO0vMCN r 000 ej "O (`o OvOwOvMoMO d OMNWONMO VO (o V in O O Lo r 'I f~ v r O ti L Cn O M r r N 07 � M N -- d � CU O O r r- N N N M v I � m t In U) V' CO N r 0 0 0 0 N O l; U T c Q O N C o Q ` w c I c� � �' Ltt � EE'E � +n w � m E E 04 � ors JO Q DNcnto�N hOr cl))CO 40Jr MWNCl)WD N Sheet1 System Curves for SAL - Morehead City Flowrate (GPM) Fiowrate (CFS) TDH Worst Case (feet) TDH Best Case (feet) Pump Curve Myers MW 50 Head, (feet) 0 0.000 8.43 5.00 27.00 10 0.022 8.56 5.07 25.70 20 0.045 8.91 5.26 24.70 30 0.067 9.46 5.55 23.90 40 0.089 10.18 5.94 22.80 50 0.111 11.07 6.42 21.70 60 0.134 12.13 6.98 20.80 70 0.156 13.35 7.64 19.70 80 0.178 14.72 8.38 18.60 90 0.201 16.26 9.20 17.30 100 0.223 17.94 10.10 15.80 110 0.245 19.78 11.09 14.30 120 0.267 21.76 12.15 12.70 130 0.290 23.88 13.29 11.10 140 0.312 26.16 14.51 Page 1 V NOV 13 '99 01:17PM E.E. MYERS - SALES P.2/3 MW50 SERIES THE MYERS MW50 SERIES SEWAGE PUMPS PRO- VIDE BIG PERFORMANCE IN A SMALL PACKAGE. The enclosed two -vane impeller provides the flow and head required for residential and light commercial sewage applications, and passes a full 2" diameter solid. The MNV50 is constructed of only the highest quality corrosion resistant mate- rials - cast iron, stainless steel and engineered thermoplastics - for many years of service in harsh sewage environment. The MW50 is avail- able in manual models for use with external controls or automatic models with piggy -back mechanical float. For more information, call your Myers distributor or the Myers, Ashland, Ohio, sales office at 419-289-1144. ADVANTAGES BY DESIGN TWO VANE IMPELLER, DESIGN PROVIDES MAXIMUM EFFICIENCY ■ EncIosed design for high efficiency pumping. ■ Eliminates possibility of jamming between impeller and volute. ■ Passes a full 2 inch solid. ■ Original performance can be restored if gear occurs by replacing volute seal ring. IA Horsepower 2" Solids Handling Sewage Pumps DURABLE MOTOR WILL DELIVER MANY YEARS OF RELLA13LE SERVICE * 02-filled motor for maximum heat dissipa- tion and continuous bearing lubrication. ■ Permanent split capacitor motor elimi- nates starting switches and relays which are prone to fail. THE MW50 IS DESIGNED FOR MANY YEARS OF MAINTENANCE FREE OPERATION E Positive sealing, quick connect power cord and piggyback float switch make replace- ment simple if service is ever necessary. a Field tested, wide angle, mercury -free mechanical float switch provides maxi- mum draw down. (Automatic models only.) PRODUCT CAPABILITIES Capacl;tes To 135 GPM 510 LPM Hoc= To 27 it. 8.23 m Max. Spherical Solids 2 in. 50.6 mm Liquids Fandling aorneslic sewage & drain WRIer lnternultent squid Tem . up to 1 a0° F I t:p to 60- c Motor Electrical Data ? 'A hp. 1625 rpm P5C (1 Ph), oll-filled I Is volts, 9,0 amps. 1 ph, 60 Hz 230 volts. 4.5 amps, 1 ph. 60 H2 Third Party Approvals CSA Acceptable pH Range 5.9 Speci;tc Gravity 9.11 Viscosity 28-35 5SV Discharge. NPT 2 in. 50.8 mm Mtn. Sump Dla. Simplex Duplex 24 in. 36 in. 61c:n 91..7 cm construction Mateilal6 Motor Housing cast iron, Class 30, ASTM A48 Impeller enclosed, engineered lherrno 1as:ic Impeller Wear Ring 304 55T volute tryst iron. Class 30. ASTM A48 volute Sealing Ring Buna-N Power Cord 20 it. 1613 SJTW/SJTW A Mechanical Shalt Seal carbon & ceramic Fasteners 300 Series SST WHERE INNOVATION MEETS TRADITION Myers NOV 13 '98 01:18PM F.E. MYERS — SALES P.3i3 MW50 SERIES PLUG Provides walertlgTt seal. MICHANICALFLOAT SWITCH •"' Mercurylree,angle operatlan. (Piggyback models only? Y. THRUST WASHER, SLELYEE BEARINGS Enhance smoclh_,,— ope:aticr, and exlend pump life, ROTARY SHAFT SEAT, Carbo% ceramic faces. HIGH EFFICIENCY YOLtllE F= S 2' sppherlcat solids. 2' N?T Discharge. `ti POWER CORD Qulcz-connect waterlight fltling is replaceable from pump eZerlor MOTOR HOUSING r Cast Iron for effldent heaf trarLsfe:. OVERLOAD SWITCH ' dUlll•ln to protect against overload conditions. Yi HP MOTOR 1625 rpm, 60 HL I IS 01 230v. PSC single phase. Otl-coaled and luM. cated. ENCLOSED TWO VANE VOLQrFJI FLLER SEAL IMPELLER RING High efficiency, passes 2' MalniaL�s high efficiency spherical sollds.,�Alh and reduces reclrcula- slelnless steel wear ring, lion, replaceable. Englneerea trtsrmop!as. Itc. Opllona! bronze conlructlon available. Ib Horsepower 2" Solids Handling Sewage Pumps DIMENSIONS e PERFORMANCE CURVE Z5 20 M CCLL M-% ;CWACC PUMP CU.1CITrtjTZM P[P MWUT[ e. 160 :,A ice Ado ;p 0 20 Io so Sp 1co 12D 1.0 CANOCl,Y GLWH3 RR ula= 0 F. E. Myers X347Pfinm h U ii0iMyer.T Ashland, Myers O Parkway Pr�nlea h U.5.p. Ashland, Ohio 44805-1969 419/289-1144 ® �SY7YlNiC , FAX: 4131289.6658. TLX: 98-7443 PERFORMANCE CURVE MOM Mw-oc ZCVVACC DUMP CAPACITY LITERS PER MINUTE G ZG0 2406 300 A66 �I�O au 5 a 10 Ln 5 b i 4 x 1 41 8 op t l! 2G 40 90 CO 1C0 1D 1pG cApACiTT C/+LLON7 PER UIN UTQ F. E. Myers 1101 Myers Parkway Ashland, Ohio 44805-1969 419/289-1144 FAX: 4191289.6658. TLX: 98-703 MEMBER Wayne ga,and Wrha-Glyn Associates SS Landscape Architect Licensed Soil Scientist S TEnvironmental Consulting Jim Anderson The John R McAdams Company Inc PO Box 14005 Research Triangle Park NC 27709-4005 REPORT MEMBER e NC-LoLA July 13 1998 To: Whom It May Concern From: Wayne Ragland Subject: Proposed Southern Assisted Living site, Morehead City, Carteret County, NC As requested, on Jul 12 1998 a soil evaluation was performed at the proposed stormwater infiltration basin location to 'serve the above referenced site, as shown on the' map entitled "Preliminary Grading & Utility Plan" for Southem Assisted Living (the owner) by The John R McAdams Company Inc dated 2/24/98. The purpose of the soil evaluation was .to determine the depth to colors indicative of soil wetness conditions and the saturated hydraulic conductivities of the soil horizons above the probable seasonal high water table conditions for the placement of a stormwater infiltration basin_ The area is mapped as the Autryville soil series but the -soils at and above the 18' elevation is more similar to the Blanton soil series taxonomy (see the attached abbreviated NRCS AutryviIle series soil description). The following soil description is typical for the area in the northwest corner of the site at and above elevation 18'. A ; 0-5" gray (10YR 511) fine sand ; weak fine granular structure ; very friable ; clear slightly wavy boundary. 4-8" E ; 5-I4" ; light gray (10YR 6.5/1) fine sand ; very weals fine granular and single grain structure ; loose to very friable ; clear slightly wavy boundary. 6-8" EBh ; 14-24" ;.brownish yellow (IOYR '7/3) fine sand ; few to common medium to large dark yellowish brown (IOYR 4/6) concretions ;"very weak fine granular and single grain structure ; loose; gradual smooth boundary. 8-13" E' ; 24-42" ; pale yellow (2.5Y 8/4) fine sand ; few to common medium faint white (2.5Y 8/2) and few fine faint yellow (1 OYR 1/6) mottles ; single grained ; loose; abrupt boundary. 20-30" Btl ;, 42-50" ; yellow (10YR 7/8) fine sandy loam ; few fine faint brownish yellow (10YR 6/8) mottles ; weals fine subangular blocky and medium granular structure ; very friable ;'gradual boundary. 6-9" Bt2 ; 50-72 ; yellow (10YR 7/8) fine sandy loam common medium distinct strongly brown (7.5YR 5/8) and few to common fine and medium light brownish gray (IOYR 6/2) mottles that increase with depth ; weak fine subangular blocky structure; very friable NOTE: ALL OF THE ABOVE COLORS ARE BASED ON DRY TO NEARLY DRY SOIL MOISTURE CONDITIONS , 910-347-9036 120 Balsam Road Jacksonville NC 28546-8508 page 1 tJ l i 1 _1/ I �J l J. uv Jlu , r Juuu r. u� Soil colors indicative of possible soil wetness, ranged from 48" to over 66". The Bt horizons started at from 40" to 50" and -has a saturated hydraulic conductivity exceeding 2" per hour. The overlying sands have saturated hydraulic conductivities that range from 6" to more than 20" per hour with 6" per hour considered a very conservative underestimate. Please advise if there is any questions. I , hereby certify that I am a Licensed Soil Scientist ; that the above findings are based on the factual site conditions evaluated on july -13 1998 , and ; that all of the above statements are true and correct to the best of my knowledge and experience. signature Yours truly wa.ryrte rR. ageaod date page 2 IJiI 1..711JJ4 1J. VW J1 WJ".� JWJt� Blanton Grossarenic Paleudult LO - loamy Sl - siliceous TH - thermic 2.5Y) >60 CP - coastal plain MT, SN - marine terrace, stream terrace (NONE to RARE) SE - MW, somewhat excessively drained; moderately well drained FL '0-58 0-58 S, FS, coS LS, US GR-S SL, LS, LcoS , SCL, SL, fSL SP-SM,SM . SM SC, SM-SC, SM ' 1-7 5-13 .1-7 10-18 12-30 6.0-20 6.0-20 6.0-20 0.6-2.0 0.03-0.07 0.05-0.10 0.02-0.04 0.10-0.15 0.10-0.15 4.5-60 4.5-6.0 4.5-5.5 4.5-5.5 - /NP -/NP -/NP <25/NP-3 A .10 5 2 >60 Brown (5YR- MS NA 0-58 58-62 62-80 SP-SM SM 2.0-6.0 4.5-6.0 12-45/3-22 Ap ; 0-7" ; gray (10YR 6/1) fine sand ; weak fine granular structure ; very friable ; many fine and common roots ; strongly acid clear wavy boundary. 6-18"-- E1 ; 7-37" ; very pale brown (10YR 7/3) fine'sand ; common medium faint white (10YR 8/2) mottles ; single grained ; loose ; common fine roots ; many uncoated sand grains ; strongly acid , gradual smooth boundary.-7 E2 ; 37-52" ; light gray (10YR 7/2) tine sand ;.many medium faint white (10YR 8/2) and few fine faint very pale brown mottles single grained ; loose ; few, fine roots ; many uncoated sand grains ; strongly acid ; clear wavy boundary. (The E horizon Wends to a depth of 40 to 80 inches).-- Bt1 ; 52-62" ;,light yellowish brown (10YR 6/4) fine sandy loam ; few fine faint brownish yellow (10YR 6/8) mottles ; moderate medium granular structure ; friable ; sand grains coated and bridged with clay ; very strongly acid ; gradual wavy boundary.-- Bt2 ; 62-67.; very pale brown. (10YR 7/4) fine sandy loam ; many medium distinct strongly brown (7.5YR 5/8) and common medium distinct pale brown (10YR 6/3) mottles ; weak'fne subangular blocky structure ; friable ; sand grains coated and bridged with clay; few, thin, discontinuousclay films 'on ped faces and in pores ; very strongly acid ; gradual wavy boundary.-- Btg ; 67-80" ; light brownish gray (10YR 6/2) fine sandy loam ; many medium distinct strong brown (7.5YR 5/8) mottles ; weak fine subangular blocky 'structure ; grayish materials area friable ; yellowish. and. brownish materials are firm ; sand grains coated and bridged with clay; few discontinuous clay films on ped faces ; very strongly acid. .(The Bt horizons extend to a depth of 60 inches or more.)- Solum thickness ranges from 60 to more than 80-inches. Content of gravel sized fragments, dominantly quartz and ironstone pebbles, is less than 10 percent by volume in all -horizons -except the A and E .horizons. which may have as much as 35 percent by volume. Reaction ranges from very strongly acid to chroma 2 or less are within the upper 10 inches of the Bt horizon. Texture of'the Bt horizon is loamy sand, -loamy coarse sand, loamy fine sand, sandy loam, fine sandy loam, or sandy clay loam. —The Btg'hodzon has hue of 5YAo 7.5YR, value of 5 to 8; and chroma of 1 or 2; or it is dominated.by chroma of 2 or less and mottled in varying shades of brown, yellow, red, and gray. Texture is sandy loam,fine sandy loam, sandy clay loam, and, below a depth,of about 66 inches, it ranges to medium acid throughout. Depth to the Bt'horizon is . commonly 50 to 70 inches but ranges from 40 to 80 inches. Mottles which indicate wetness occur at.depths of between 30 and 72 inches. The A horizon has hue of 2.5Y or 10YR, value of 3 to 7, and chroma of 1 toA. Thickness is less than 10 inches where value is 3.5 or'Iess.Texture.-is sand, fine sand, coarse sand, loamy sand, loamy fine sand or their gravelly analogs. The E.horizon has hue of 2.5Y to 7.5YR, value'of 5 to 8, and chroma of 1 to 8: Texture is the same as the A horizon. The E horizori is 50 percent ormore uncoated sand grains. The 8E horizon, where present, has hue of 2.5Y or 10YR, value of 5 to 7, and chroma of 3 to 8. Texture is loamy sand, loamy coarse sand, loamy fine sand, and sandy loam. Thickness is less than 12 inches. The Bt horizon has hue of MY to 7.5YR, value of 5 to 7, and chroma of 3 to 8, or it is mottles in various shades of brown, yellow, red and gray. In most pedons rnottles of sandy clay. Content. of nodular and platy plinthite is less than 5 percent within a depth.of 60 inches, but ranges up to 15 percent below that depth. ,1.----I ,., DATE: July 221998 Wrha-GIP Assodwes LANDSCAPE ARCHITECT. LICENSED SOIL SCIENTIST ENVIRONMENTAL CONSULTING TO: Jiim Anderson COMPANY:- The John R McAdams Company Inc FROM :. Way»e .Ha0and SUBJECT : Southern Assisted Live site in Morehead City message Dear Mr Anderson: In confirmation of our phone conversation of 7/21/98, 1 offer the following addendum to the July 13 1998 soil evaluation report for the proposed stormwater infiltration basin to serve the above referenced project site. The range in depth to soil morphology indicators of "soil wetness" ranged from 48" to over. 66" based on soil samples at the slope grade break at the western end of the basin location as shown on the 2/24/98 "Preliminary Grading & Utility Plan" and a sample location outside -the basin location at or close to the southern most extent the elevation 18' contour. The closer the samples get to the northwest comer of the parcel, the deeper the soil wetness indicators as well as the sandy loam Bt subsoil. If the geometry of the proposed basin is limited to at or above the existing 1:9' contour in the northwest corner of the parcel, all portions of the basin will have soil wetness . characteristics at or deeper than 5' from the present soil surface. If the basin is reconfigured to optimize the area lost to'the basin, I do suggest that the depth be planned so that at least 6` to 12" of natural sand be left' over the sandy loam. Bt horizon to optimize the initial infiltration capacity of the . Basin. Based on the present information available, this can be accomplished by keeping the basin -invert at or above elevation 14'. Please advise if there is any additional questions. Yours truly 7V 4's ycte Rageastd Copies: Southern Assisted Living 910 3347 9036 (ph�o..e v 120 BALSaM ROAO, JACKSONVILLE, N.C. 28546-8508 page I t:C 4bem x4s5, '51c� i � .� -- �- DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION 1. The minimum bore depth:(„�1 Pt y &Ii(cm /7 -f2 2' , 2 3 4 The type of soil: The expected infiltration rate:26' 0rFzce The depth to the Seasonal High Water Table: /�ear 5. Additional comments: on `- �2jGS Use - used - eve:sh� 2-ble zs -b Signature of Regional Office Personnel: Linda Lewis, DWQ Vincent Lewis, Soil Scientist Permit Application No. g5050? _ CX Date 10—q- qy S:\WQS\STORMWAT\FORMS\INFINVST. FOR