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Home My WebLink AboutSW8960913_COMPLIANCE_19960923STORMWATER DIVISION CODING SHEET POST -CONSTRUCTION PERMITS PERMIT NO. SWeg&Q?`5 DOC TYPE ❑ CURRENT PERMIT ❑ APPROVED PLANS ❑ HISTORICAL FILE COMPLIANCE EVALUATION INSPECTION DOC DATE WYYMMDD 7650 MARKET STREET WILMINGTON, NORTH CAROLINA 28405 ENGINEERING OFFICE: 910-686-9114 FAX: 910-686-9666 September 23, 1996 Tripp Engineering, Inc. 211 North Fifth Avenue Wilmington, North Carolina 28401 Attention: Mr. Phil Tripp, P.E. Reference: Infiltration Evaluation Pioneer Roofing Company Building Wilmington, North Carolina Job No. 1032-96 Dear vh-. Tripp: Soil Tech Engineering, Inc. has recently conducted a study of the subsurface soils within the Pioneer Roofing Company site located on Highway 421 north of Wilmington in New Hanover County, North Carolina. A representative visited the jobsite on September 16, 1996, to explore the subsurface conditions within the proposed stormwater infiltration pond area. Our representative explored the subsurface conditions at randomly selected locations to a depth of approximately 3 to 6 feet below the existing subgrade. Our representative also conducted a study of the infiltration rate of the surface soils. Our findings indicate generally uniform relatively free draining sands to the depths we were capable of investigating to using hand tools. Our infiltration test indicate an existing infiltration rate of 40 to 50 inches per hour. We found a perched groundwater condition ranging from approximately 12 to 44 inches below the existing ground surface at the locations explored during this study. This perched condition is probably due to the low topographic features on -site, because of the amount of stormwater runoff that is channeled through this area and due to the siltation and leaf litter that has collected in this area over the years. °`� �gATER � EOCT 21 996 D PRQJ ri)�Ct'�13 Tripp Engineering, Inc. September 23, 1996 Page Two We believe that a significant amount of stormwater runoff traverses this area which will effect around-avater fluctuation siLynificantiv. We anticipate a oerched condition will re- establish itself at approximately Elevation 12.5 to 13.0 during the wetter months, We also anticipate a general decline in the presented infiltration rate due to ground vegetation and siltation. Annual maintenance of this area to maintain acceptable infiltration rates will be required. Please find the results of our field tests together with a sketch of the sampled locations attached Please feel free to contact our office if you have questions. Very truly yours, SOIL TECH ENGINEERING �C1AI1iIS +� Parks A. Downing, Jr. Mana er .lames Pate, P.E. PADjr:JP/tic 1032a9-23 Attachments Site Evaluation Pioneer Roofing Company Wilmington, North Carolina Job No, 1032-96 September 16, 1996 L cati n Depth Descripitlan 1 0-2" Root Mat 2-36" White vledium to Coarse SAND Groundwater was encountered at 12" below around surface. 92 0-2" Root Mat 2-36" Orange/Tan Fine to Coarse SAND Groundwater was encountered at 12" below around surface. #3 0-2" Root Mat 2-72" Yellow/Orange Fine to 10edium SAND Groundwater was encountered at 44" below around surface. :I All S"Late Suppl Highway 421 Praxai r VMV4iiffzSq� Denotes location of infiltration study Pioneer Roofing � an Denotes location of subsurface investigation Wilmington, NC Job No. 1032-96 Location: Depth: Sieve 5ize 910 Grain Size Analysis Pioneer Roofing Company Wilmington, North Carolina Job No. 1032-96 #1 43 2-36" 2-72" Percent Passing- Bv WeiUht 99.9 99.9 #40 28.5 58.9 480 1.8 4.1 #200 1.3 2.3 Percent 21.0 5,5 iVioisture: Soil White Viedium Yellow/Orange Description: to Coarse SAND Fine to Medium SAND DMSION OF ENVIRONMENTAL MANAGEENIENT NORTH CAROLINA STORMWATER MANAGEMENT PER INUT APPLICATION I. GENERAL INFORMATION 1. Project Name Pioneer Roofing 2. Location, directions to project (include County, Address, State Road) Attach map. New Hanover County, US 421, next to Praxair 3. Owner's Name Ohio Valley Land Company Phone 304-295-3311 4.Owner's Mailing Address P.O. Box 5025 City Vienna - State WV Zip 26105 5. Application date 9/19/96 Fee enclosed $__385 00 6. Nearest Receiving Stream Northeast Cape Fear River Class SC SW 7.Projectdescription_ Commercial Devel_qpment II. PERMIT INFORNIATION 1. Permit No. (To befilled in by DEW) 6W �F q('00 , 2. Permit Type x New 3. Project Type: Low Density Renewal Modification (existing Permit No.) _Detention X Infiltration Other: Redevelop General 4. Other State/Federal Permits/Approvals Required (Check appraprizue blankr) CAMA Major Sedimentation/Erosion Control X 404 Permit Dir Cert III. BUILT UPON AREA (Please see NCAC 2H.1005 three .1007for applicable denriry limits) _Drainage Drainage Breakdown of Impervious Area Basin Basin (Please indicate below the design impervious area) Classification SC SW Buildings 81 000 SF Allowable Impervious Area Total Project Area 1 r% A — Proposed Impervious Area 2.0 Ac % Impervious Area 60.0 IV. STOMMWATER TREATMENT (Describe how the runoff will be treated) Infiltration Streets 11,210 SF Parking/SW 35,083 SF Future 32,217 SF Totals 86,510 SF V. DEED RESTRICTIONS AND PROTECTIVE COVENANTS Deed restrictions and protective covenants are required to be recorded for all low density projects and all subdivisions prior to the sale of any lot_ Please see Attachment A for the specific items that must be recorded for the type of project applied for. By your signature below, you certify that the recorded deed restrictions and protective covenants for this project shall include all the items required by the permit, that the covenants will be binding on all parties and persons claiming under them, that they will run with the land, that the covenant cannot be changed or deleted without concurrence from the State, and that they will be recorded prior to the sale of any lot. VI. OWNER'S CERTIFICATION I, Harry H. Esbenshade certify that the information included on this permit (Please print or type name clearly) application form is correct, that the project will be constructed in conformance with the approved plans, that the deed restrictions will be recorded with all required permit conditions, and that to the best of my knowledge, the proposed project complies with the requirements of 15A NCAC 2H_ 1000. I authorize the belo name �aerson firm to submit stormwater plans on my behalf. 9/18/96 �i fief/Authorized Agent Si atur isle Date resident VII. AGENT AUTHORIZATION (musrBE coMPr.=) Person or firm name _ _ Trip2 Engineering, P.C. Mailing Address 211 1/2 North Fifth Avenue City Wilmington State NC Zip 28401 Phone 910-763-5100 Please submit application, fee, plans and calculations to the appropriate Regional Office. cc: Applicant/WiRO//Central Files ST0qqV4TFP �SEP 23 i9%1 E PRo.1 D CPOcf 3 INFILTRATION POND NIAINTENANCE Project Name: Pioneer Roofing Responsible Party Name: Ohio Valley Land Company Address: P.O. Box 5025, Vienna, WV 26105 phonNo: 304-295-3311 after every runoff' producing rainfall event. or at ;east monthly. whichever conies firs[: 1. Inspe.:t the infiltration pond(s) for erosion. trash accumulation_, gras-9 coverage, and general condition of the facility. 2. Rcpair eroded areas immediately, re -seed as necessary. keep side slopes and bottom mowed.. and remove trash. 3. Chcck an% inlet piping, svralc, and ,atc;h busirL. Repair broken pipitig. resccd zi%valCz�, un1 remove trash, a� 4. lnspe.-t the bypass'ovtrtlow structure for blockage and deterioration. Remove hloekag: —In A- xi repair structure to originally approve; design specifications. 5. Check the depth ofthe porid(,,;, every six rnonths. ffsiltail-m has occurred to the point that 1e5'*+h.4 {°o of the original design depth is provided. the -secs silt to the orig:rta! depth, lac not over-exzavate. as this may caulc dw required %eater table ,cparat:on to he reduced. and iniv att ct the ability ofthe stiste;n to per-Tonn az, desisted. SPECIAL REQUIREMENT 1, Harry H. Esbenshade the maintenance items as listed above Ior the systern, or c Signature agree to bz responsible for pc:r•fot=ng ect. i agree to no[if� NCDE�I .�t :un pr'!�l)ICInI� with name of the responsible part-. or address. Date 9/18/96 STORMWATER p E C E I V E SEP 2 31996 a E rul PRo.7 st ct�_9 aC0vc( 3 MWF' Rbneeyr- DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION 1. The minimum bore depth 2. The type of soil: 3. The expected infiltration rate: No/LQ- — 2 7 l / propo sect 4. The depth to the Seasonal High Water Table: < it 5. Additional comments: po,,j m p1�� c( 6 o fh;- Q-m S 1b e' � on 6 CY1. 25 cs�v cv h Svnol Ch ec/c- orl ti-(v�Cl Signature of Regional Office Personnel: Linda Lewis, DWQ S :1WQSISTORMWATIFORMSIINFINVST. FOR /77 2x- /G r(J-91O.�J be - Vincent Lewis, Soil Scientist c)h l o V 211 L 2n � Co, 9W W } i SIB elf Ref-�,-1 DIVISION OF WATER QUALITY INFILTRATION SYSTEM INVESTIGATION 1. The minimum bore depth: 41 / -3) 2. 3 4 5 The type of soil: I<ureh Sin The expected infiltration rate: C0 r { The depth to the Seasonal High Water Table: ��{I Additional comments: 'CCU er cm h 1: 6 PU17 C/ Signature of Regional Office Personnel: &� (j,0- ketv,-� Linda Lewis, DWQ S :1WQSISTORMWATIFORMSIINFINVST. FOR La—C XeL.,,� Vincent Lewis, Soil Scientist