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HomeMy WebLinkAboutWQ0040204_Application (FTSE)_20181127Central Files: APS SWP 8/6/2 018 Permit Number WQ004.0204 Permit Tracking Slip Program Category Status Project Type Non -discharge In review New Project Permit Type Version Permit Classification Gravity Sewer Extension, Pump Stations; & Pressure Sewer Extensions A Individual Primary. Reviewer Permit Contact Affiliation dean.hunkele . Coastal SWRule Permitted Flow 0 Facility _ Facility Name _ Major/Minor Region Pump Station 26 Upgrade_and Expansion Minor Wilmington Location Address County = New Hanover Facility Contact Affiliation Owner Owner Name Owner Type Cape Fear Public Utility Authority Government - Municipal Owner Affiliation James R. Flechtner PE 235 Government Center Dr Dates/Events Wilmington NC 28403 NORRIS & TUNSTALL CONSULTING ENGINEERS P.C. 902 Market Street Wilmington, NC 28401 (910) 343-9653 (910) 343-9604 Fax John S. Tunstall, P.E. T. Jason Clark, P.E. Joseph S. Hill, Jr., P.E. August 3, 2018 NC DEQ Division of Water Resources Water Quality Regional Operations Section Wilmington Regional Office 127 Cardinal Drive Extension Wilmington, NC 28405 RFCEIUEQ/NCUENRJDWR AUG 03 2018 Water Quality Regional Operations Section Wilmington Regional Office Re: Gravity Sewer Extension Fast -Track Permit Application CFPUA Pump Station 26 and Force Main Installation Wilmington, NC N&T Project No. 16084 Dear Sir or Madam: 1429 Ash -Little River Road rash, NC 28420 (910) 287-5900 (910) 287-5902 Fax J. Phillip Norris, P.E. Thomas J. Scheetz, E.I. Enclosed is one (1) original application form with one (1) copy, two (2) copies of the Sewer Narrative, two (2) 8'/ x 11 color USGS Topographic Maps, two (2) site plans (ledger size) and a $480.00 check for the processing fee. Please review this information for approval and contact us with any questions or comments you may have. Thank you for your assistance on this project. Sincerely, NORRIS & TUNSTALL CONSULTING ENGINEERS, P.C. n S. Tunstall, P.E. JST/asn 16084 08-03-18-s-swr-Itr Enclosures NCBELS License C-3641 State of North Carolina Department of Environmental Quality Division of Water Resources 15A NCAC 02T .0300 —FAST TRACK SEWER SYSTEM EXTENSION APPLICATION Division of Water Resources FTA 04-16 &SUPPORTING DOCUMENTATION Application Number. (to be completed by DWR) All items must be completed or the application will be returned I. APPLICANT INFORMATION: 1. Applicant's name: Cape Fear Public Utility Authority (company, municipality, HOA, utility, etc.) 2. Applicant type: ❑ Individual El Corporation ❑ General Partnership El Privately -Owned Public Utility ❑ Federal ❑ State/County El Municipal ® Other 3. Signature authority's name: Matt Tribett, P.E. per 15A NCAC 02T .0106(b) Title: Engineering Manager 4. Applicant's mailing address: 235 Government Center Drive C4 FOwF . City: Wilm_ State NC Zip: 2 403- 5. rY Applicants contact information:AUG 0 3 20% Phone number: (910) 332-6415 Email Address: Matthew. Tribett o,cfpua.org, H. PROJECT INFORMATION: 1. Project name: Pump Station 26 2. Application/Project status: 'Proposed (New Permit) ermit P oject If a modification, provide the existing permit number: WQ00 and issued date: If new construction but part of a master plan, provide the existing permit number: WQ00 3. County where project is located: New Hanover 4. Approximate Coordinates (Decimal Degrees): Latitude: Longitude: -7 5. Parcel ID (if applicable): (or Parcel ID to closest downstream sewer) III. CONSULTANT INFORMATION: 1. Professional Engineer: John S. Tunstall, P.E. License Number: 19851 Firm: Norris & Tunstall Consulting Engineers, P.C. Mailing address: 902 Market Street City: Wilmin on State: NC Zip: 28401- Phone number: (910) 343-9653 Email Address: jtunstall@ntenizineers.com IV. WASTEWATER TREATMENT FACILITY (WWTF) INFORMATION: 1. Facility Name: M'Kean Maffitt (Southside WWTP) Permit Number: NC 0023973 Owner Name: Cape Fear Public Utility Authority V. RECEIVING DOWNSTREAM SEWER INFORMATION (if different than WWTF): l . Permit Number(s): WQ System Wide Collection System Permit Number(s) (if applicable): WQCS Owner Name(s): Cape Fear Public Utility Authority FORM: FTA 04-16 Page 1 of 5 al GENERAL REQUIREMENTS 1. If the Applicant is a Privately -Owned Public Utility, has a Certificate of Public Convenience and Necessity been attached? ❑ Yes E]No �N/A 2. If the Applicant is a Developer of lots to be sold, has a Developer's Operational Agreement (FORM: Dbeen attached? ❑ Yes ❑No ❑N/A 3. If the Applicant is a Home/Property Owners' Association, has an Operational Agreement (FORM: HOAR been attached? El Yes ❑No ❑N/A 4. Origin of wastewater: (check all that apply): � Residential Owned N Retail (stores, centers, malls) El Car Wash Residential Leased El Retail with food preparation/service El Hotel and/or Motels ❑ School /preschool /day care El Medical /dental /veterinary facilities El Swimming Pool /Clubhouse ❑ Food and drink facilities E]Church ❑Swimming Pool/Filter Backwash ❑ Businesses /offices /factories ❑Nursing Home ❑Other (Explain in Attachment) 5. Nature of wastewater: 100 % Domestic/Commercial % Commercial Industrial (See 15A NCAC 02T .0103(20)) >-Is there a Pretreatment Program in effect? ❑Yes ❑ No 6. Hasa flow reduction been approved under 15A NCAC 02T .0114(fl? ❑ Yes ® No ➢ If ,yes, provide a copy of flow reduction approval letter 7. Summarize wastewater generated by project: Establishment Type (see 02T.0114(f)) Daily Design Flow 19b No. of Units Flow gal/ GPD gal/ GPD gal/ GPD gal/ GPD gal GPD gal/ GPD Total 0 GPD a See 15A NCAC 02T .0114(b), (d),,(e)(1) and, (e)(2) for caveats to wastewater design flow rates (i.e., minimum flow per dwelling; proposed unknown non-residential development uses; public access facilities located near high public use areas; and residential property located south or east of the Atlantic Intracoastal Waterway to be used as vacation rentals as defined in G.S. 42A-4). b Per 15A NCAC 02T .0114(c), design flow rates for establishments not identified [in table 15A NCAC 02T.0114] shall be determined using available flow data, water using fixtures, occupancy or operation patterns, and other measured data. 8. Wastewater generated by project: 0 GPD (per 15A NCAC 02T .0114) ➢ Do not include future flows or previously permitted allocations If permitted flow is zero, indicate why: ® Pump Station or Gravity Sewer where flow will be permitted in subsequent permits that connect to this line ❑ Flow has already been allocated in Permit Number: ❑ Rehabilitation or replacement of existing sewer with no new flow expected ❑ Other (Explain): FORM: FTA 04-16 Page 2 of 5 ! 1 VII. GRAVITY SEWER DESIGN CRITERIA (If Applicable) - 02T .0305 & MDC (Gravity Sewers): l . Summarize gravity sewer to be permitted: Size (inches) Length (feet) Material ➢ Section II & III of the MDC for Permitting of Gravity Sewers contains information related to design criteria ➢ Section III contains information related to minimum slopes for gravity sewer(s) ➢ Oversizing lines to meet minimum slope requirement is not allowed and a violation of the MDC VIII. PUMP STATION DESIGN CRITERIA (If Applicable) — 02T .0305 & MDC (Pump Stations/Force Mains): COMPLETE FOR EACH PUMP STATION INCLUDED IN THIS PROJECT 1. Pump station number or name: PS 26 2. Approximate Coordinates (Decimal Degrees): Latitude: 34.0927' Longitude:-77.5506' 3. Design flow of the pump station: 0.366906 millions gallons per day (firm capacity) 4. Operational point(s) of the pump(s): 300 gallons per minute at 67 feet total dynamic head (TDH) 5. Summarize the force main to be permitted (for this Pump Station): Size (inches) Length (feet) Material 6" 29770 PVC 8" 490 HDPE 6. Power reliability in accordance with 15A NCAC 02T .0305(h)(1): Z Standby power source or pump with automatic activation and telemetry - 15A NCAC 02T .0305(h)(1)(B)_ ➢ Required for all pump stations with an average daily flow greater than or equal to 15,000 gallons per day ➢ Must be permanent to facility Or if the pump station has an average daily flow less than 15,000 gallons per day: ❑ Portable power source with manual activation, quick -connection receptacle and telemetry - 15A NCAC 02T .0305(h)(1)(C) or ❑ Portable pumping unit with plugged emergency pump connection and telemetry - 15A NCAC 02T .0305(h)(1)(C): ➢ It shall be demonstrated to the Division that the portable source is owned or contracted by the applicant (draft agreement) and is compatible with the station. ➢ If the portable power source or pump is dedicated to multiple pump stations, an evaluation of all the pump stations' storage capacities and the rotation schedule of the portable power source or pump, including travel timeframes, shall be provided in the case of a multiple station power outage. FORM: FTA 04-16 Page 3 of 5 1A. SETBACKS & SEPARATIONS — (02B .0200 & 15A NCAC 02T .0305(f)): 9 1. Does the project comply with all separations found in 15A NCAC 02T .0305(f) & (g) ® Yes ❑ No ➢ 15A NCAC 02T_0305(f) enntaing minimum senaratinm that shall be. nrnvided fnr sewer w4ems: Setback Parameter* Separation Re uired Storm sewers and other utilities not listed below vertical 24 inches Water mains vertical -water over sewer including in benched trenches 18 inches Water mains horizontal 10 feet Reclaimed water lines vertical - reclaimed over sewer 18 inches Reclaimed water lines horizontal - reclaimed over sewer 2 feet "Any private or public water supply source, including any wells, WS-I waters of Class I or Class II impounded reservoirs used as a source of drinking water 100 feet "Waters classified WS (except WS-I or WS-V), B, SA, ORW, HQW, or SB from normal water or tide elevation and wetlands see item IX.2 50 feet -high "Any other stream, lake, impoundment, or ground water lowering and surface drainage ditches 10 feet Any building foundation 5 feet Any basement 10 feet slope of embankment or cuts of 2 feet or more vertical height 10 feet -Top Drainage systems and interceptor drains 5 feet swimmin pools 10 feet -Any Final earth grade vertical 36 inches ➢ 15A NCAC 02T.0305(g) contains alternatives where separations in 02T.0305(fl cannot be achieved. ➢ **Stream classifications can be identified using the Division's NC Surface Water Classifications webpage ➢ If noncompliance with 02T.0305M or (g), see Section X of this application 2. Does the project comply with separation requirements for wetlands? (50 feet of separation) ❑Yes No ➢ See the Division's draft separation requirements for situations where separation cannot be meet ➢ No variance is required if the alternative design criteria specified is utilized in design and construction ➢ As built documents should reference the location of areas effectedi 3. Does the project comply with all setbacks found in the river basin rules per 15A NCAC 21B .0200? [:]Yes [:]No ➢ This would include Trout Buffered Streams per 15A NCAC 2B.0202 4. Does the project comply with an individual 404 Permit or any 401 Certifications? 0 Yes ❑ No ➢ Wetland -related permits shall be requested, obtained, and adhered to for projects that impact wetlands or surface waters ➢ Information can be obtained from the 401 & Buffer Permitting Branch 5. Does project comply with 15A NCAC 02T.0105(c)(6) (additional permits/certifications)? ❑ Yes ❑ No Per 15A NCAC 02T.0105(c)(6), directly related environmental permits or certification applications are being prepared, have been applied for, or have been obtained. Issuance of this permit is contingent on issuance of dependent permits (erosion and sedimentation control plans, stormwater management plans, etc.). 6. Does this project include any sewer collection lines that are deemed "high -priority?" Per 15A NCAC 02T.0402, "high -priority sewer" means "any aerial sewer, sewer contacting surface waters, siphon, or sewer positioned parallel to streambanks that is subject to erosion that undermines or deteriorates the sewer. ❑ Yes ® No ➢ If yes, include an attachment with details for each line, including type (aerial line, size, material, and location). High priority lines shall be inspected by the permittee or its representative at least once every six -months and inspections documented per 15A NCAC 02T.0403(a)(5) or the permitee's individual System -Wide Collection permit. FORM: FTA 04-16 Page 4 of 5 X. CERTIFICATIONS: a # 1. Does the submitted system comply with 15A NCAC 02T, the Minimum Design Criteria for the Permitting of Pump Stations and Force Mains (latest version, and the Gravity Sewer Minimum Design Criteria (latest versions as appli able? ❑ Yes � No E i.0��11�1G Ts A.Al �uJ �����w � � 1 � l�i&�-17151 �'Ca i �L"'�j If No, complete and submit the Variance/Alternative Design Request application (VADC 10-14) and supporting dfor review. Annroval of the request is required prior to submittal of the Fast Track AnDlication and suonorting documents. 2. Professional Engineer's Certification: I, (Professional Engineer's name from Application I b a III.1.) attest that this application for has been reviewed by me and is accurate, complete and consistent with the information supplied in the plans, specifications, engineering calculations, and all other supporting documentation to the best of my knowledge. I further attest that to the best of my knowledge the proposed design has been prepared in accordance with the applicable regulations, Gravity Sewer Minimum Design Criteria for Gravity Sewers (latest version), and the Minimum Design Criteria for the Fast -Track Permitting of Pump Stations and Force Mains (latest version). Although other professionals may have developed certain portions of this submittal package, inclusion of these materials under my signature and seal signifies that I have reviewed this material and have judged it to be consistent with the proposed design. NOTE — In accordance with General Statutes 143-215.6A and 143-215.6B, any person who knowingly makes any false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may include a fine not to exceed $10,000, as well as civil penalties up to $25,000 per violation. ..............................`,�iSti+iii............... ...... North Carolina Professional Engineer's seal signature, n date: �4�`�C g g ,a and ,e� A gyp. • • � . • 19851 • ......................................................................................... 3. Applicant's Certification per 15A NCAC 02T .0106(b): I, r--e 6 ENCM 6 P_. attest that this application for (Signature Authority's name & title from Application Item I.3.) has been reviewed by me and is accurate and complete to the best of my knowledge. I understand that if all required parts of this application are not completed and that if all required supporting documentation and attachments are not included, this application package is subject to being returned as incomplete. I understand that any discharge of wastewater from this non - discharge system to surface waters or the land will result in an immediate enforcement action that may include civil penalties, injunctive relief, and/or criminal prosecution. I will make no claim against the Division of Water Resources should a condition of this permit be violated. I also understand that if all required parts of this application package are not completed and that if all required supporting information and attachments are not included, this application package will be returned to me as incomplete. NOTE — In accordance with General Statutes 143-215.6A and 143-215.6B, any person who knowingly makes any false statement, representation, or certification in any application package shall be guilty of a Class 2 misdemeanor, which may include a fine not toe Geed $10,000 as well as civil penalties up to $25,000 per violation. "47 Signature: Date: FORM: FTA 04-16 Page 5 of 5 ��. 34009127.3"N 77055'06.4"W 11 /27/2018 ti T r.. �^- •C!114'�:. ':'4` _ ., . •i't%i1 Q d W / — -----— ——.. 1 v o :'p-_ - -•- - -- - - �� , ,� . --.._.- � •`.` rI __._ ---- %• � C 5 - - --, - XN5 LLJM z _ APPLETON WAY N ° REMOVE EXISTING CONCRETE DRIVEWAY AS REQUIRED TO / _ v (60' ROW) o • y bq C� Z INSTALL NEW FORCEMAIN Pc?iYc° . ....... I �4 :- d d r wow CONTRACTOR TO COORDINATE LOCATION _ - - cp N Z) OF NEW B" SSFM WITH NEW PUMP PROPOSED NEW 6 FORCE MAIN N } O yr>•'` �� �� LOCATION. SAWCUT FLOOR SLAB TO SEE PLAN AND PROFILE SHEETS �� ��r� -- '�i1 �� Z z Z U INSTALL NEW 6" SSFM. PR2, PR3, PR4 ~~r O' Z i, 2$ LA ///i�r • 1 O ,LU � •: �•";.`•° �" ' � I SEE STRUCTURAL PLANS. �c,.� �& _ _ _. - .... - 1 .. O W � Z O j O icty 4" CAP I,-- IL d Z EIFFM 6FM - N� LLlTed l C L CC L 6F PRIOR TO CONSTRUCTION FILED o e * 1 N 3 LOCATE EXISTING 4" SSFM INS N 5°'' �; ,•: TSF TSF N u O — w EXISTING PUMP STATION. CAP, �� 0 O 2 TSF a U eJ" z AND REMOVE SSFM ON PUMP;.,`y �l SF STATION SITE _F,� 4 . �� �� �INSTALLEMPORARY - r o EXISTING SILT FENCE d 4 SSFM '" _ RY. +,- - e4A �� �� g� .,� l - - - U w FLOW METER TRANSDUCER IN A VX4' a F PRECAST BOX WITH LOCKABLE HATCH, Q W c X PER MANUFACTURERS REQUIREMENTS w c LOCATION. TOP OF BOX SHALL BE a U a r 3 SET TO GRADE. w � 0 REMOVE EXISTING ACCESS Z > Z o EXISTING SINGLE I \\ - '� HATCHES AND INSTALL NEW cc < 0 LL O Q N MASONRY BUILDING x y" WATER TIGHT ACCESS O d ? - x ° '' HATCHES. O Z WITH BRICK VENEER c: �, a gU¢n ZaCN DURING WET WELL SUCTION LIFT J INSTALL TEMPORARY de _ x PIPE REPLACEMENT, PUMP OUT U w U SILT FENCE CLEAN WET WELL EPDXY COAT NOTES: ems` y G >. I WET WELL SEE SPECIFICATIONS EPDXY COATING. 1. COORD INATE DINATE PUMP STATION UPGRADES WITH CFPUA. BYPASS PUMPING PLANS WILL NEED TO BE SUBMITTED AND APPROVED BY s' x Iearne artax. ' CFPUA. REMOVE EXISTING 10 HP 2. PRIOR TO CONSTRUCTION SCHDULE WITH MEANS SUCTION LIFT PUMPS AND REPLACE WITH NEW GORMAN X METHODS OF PUMP REPLACEMENT PROVIDE ENGENEER AND CFPUA.AND ° ?5- RUPP 15 HP MOTORS AND ^� : ( '- . � REMOVE EXISTING 3" SUCTION LIFT PIPES FROM PUMPS TO WET 3. FIELD LOCATE ALL EXISTING UTILITIES PRIOR TO CONSTRUCTION. / PUMPS. SEE ELECTRICAL 2. I WELL AND REPLACE WITH NEW ^ n PLANSFOR NEW ELECTRICAL v "� FLANGED 4" DUCTILE IRON PIPES. t u 0 0 . a 4. NEW 6" SSFM FROM PUMP STATION TO CONNECTION AT CAROLINA I ADD 8" #57 STONE OVER FABRIC AS REQUIRED TO ELEVATION 8 WITHIN FENCE LINE 00 0 o 0 o 0 o a 0 0 0 o COORDINATE PIPE CONFIGURATION `�• 'o o0 �� 0 0 0 0°� a oo a oo p o0 0 0 t WITH PUMP MANUFACTURER. 000p 0 0 0 o T REMOVE & REPLACE EXIST. GENERATOR AND PAD. SEE ELECTRICAL PLANS. NEW GENERATOR MUST BE 2' ABOVE 100 YEAR FLOOD ELEVATION. NEW .7 t, GENERATOR PAD 10'X7' MIN. FFE OF NEW PAD y� ;z SHALL MATCH THE EXIST. BUILDING FFE. CFPUA PS 26 REMOVE AND RELOCATE EXISTING FENCE TO (ECHO #') ACCOMODATE NEW GENERATOR AND PLATFORM. 4226 ApPLETON WAY (1't OFF PLATFORM/2.5'± GENERATOR PAD). INSTALL 8" ABC STONE OVER WILMINGTON, NC 28412 NEW FENCE SHALL BE 8' ORNAMENTAL FENCE FABRIC 5' BEYOND THE NEW BLACK ALUMINIUM WITH EXPOSED 3/4" PICKETS. FENCE. MAX SLOPE TO TIE INTO THE EXISTING GRADE IS 3:1. PUMP DATA: PROPOSED SUCTION LIFT PUMPS PS 26 (ECHO #1) GORMAN RUPP SUCTION LIFT PUMPS (T4A3-B) SEE DETAIL LEGEND. 15 HP, 3RH/6DHZ/230 VOLTS - MOTOR 1800 RPM PUMP MOTOR SPEED - 1560 RPM PUMP RATE = 300 GPM O 67' TDH - BOUNDARY - - � WET WELL SUCTION LIFT OIA. = 4" MJ DIP -RIGHT OF WAY .. -- - -. . - ---•--•----- -------- -ROAD CENTERLINE - - EASEMENT SURVEY BY MICHAEL UNDERWOOD AND ASSOCIATES, P.A. - EXIST, SANITARY SEWER LINE - -- ---- - --- - -EXIST. SANITARY SEWER FORCEMAIN SURVEY NOTES: DATUM-1988 - EXIST. WATER LINE BENCHMARK- -100' FLOOD ELEVATION- 9.0 tr ztaeaa. s .I 'r^ts+:>�1 EXIST. STORM DRAIN FIRM MAP-3720312.500J 04/03/2006 - - --- -- % - --X - - - - EXIST. FENCE 8FM - PROPOSED 8" FORCEMAIN TSF - TEMP. SILT FENCE / SCALE: 1" = 10' 0 10 20 30 BEACH ROAD SHALL BE INSTALLED PRIOR TO PUMP STATION 28 C u 4 UPGRADES. 5. EXISTING PUMP STATION (PRIOR TO DEVELOPME" ADF = 106 BY CFPUA) Q+ a GPD (BASED ON FLOW DATA PROVIDED EXISTING PUMP STATION PEAK DAILY FLOW (x2.1)- 276 GPM. (BASED � 0 i=] ON FLOW DATA PROVIDED BY CFPUA). Z w . 6. ALL WORK WITHIN NCDOT R/W SHALL BE COORDINATED WITH z NCDOT. Lr Ci P 7. ALL EXCAVATIONS INSIDE THE THEORETICAL 1:1 SLOPE FROM THE EXISTING EDGE OF PAVEMENT TO THE BOTTOM OF THE NEAREST 1 W Ur TRENCH WALL SHALL BE MADE IN ACCORDANCE WITH THE FOLLOWING CONDITIONS: A. ALL TRENCH EXCAVATION INSIDE THE LIMITS OF THE THEORETICAL _ (n P4 1:1 SLOPE AS DEFINED BY THE POLICY, SHALL BE COMPLETELY BACKFILLED AND COMPACTED AT THE END OF EACH CONSTRUCTION DAY. NO PORTION OF THE TRENCH SHALL BE LEFT OPEN OVERNIGHT. , D u g z z f z B. THE LENGTH OF PARALLEL EXCAVATION SHALL BE LIMITED TO THE PIPE O FGa CJ j z LENGTH NECESSARY TO INSTALL AND BACKFlLL ONE JOINT OF AT A TIME.O w I '4 z0 C. TRAFFIC SHALL BE MOVED TO A TRAVEL LANE OUTSIDE THE LIMITS R a OF A THEORETICAL 1:1 SLOPE FROM THE BOTTOM OF THE NEAREST TRENCH WALL TO THE PAVEMENT SURFACE. D. INSTALLATION OF TRENCH SHORING SHALL BE ACCOMPLISHED WITH MINIMAL OVER -EXCAVATION. TRENCH BOXES SHALL NOT BE USED AS SHORING. E. AN NCDOT INSPECTOR, THE COST OF WHICH TO BE BORNE BY THE PARTY OF THE SECOND PART, SHALL BE ASSIGNED TO THIS PROJECT IF DEEMED NECESSARY BY THE DIVISION ENGINEER. F. THE TRENCH BACKFlLL MATERIAL SHALL MEET THE STATEWIDE BORROW CRITERIA. THE TRENCH SHALL BE BACKFILLED, IN limn #C-3641 16084 ors JST CKIL JPN DRW NKS ACCORDANCE WITH SECTION 3OG-6 OF THE JANUARY 2006 STATEWIDE STANDARD SPECIFICATIONS FOR ROADS AND STRUCTURES, WHICH BASICALLY REQUIRES THE BACKFlLL MATERIAL TO BE PLACED IN LAYERS NOT TO EXCEED SIX INCHES LOOSE AND COMPACTED TO AT LEAST 95% OF THE DENSITY OBTAINED BY COMPACTING A SAMPLE IN ACCORDANCE WITH AASHTO T99, AS MODIFIED BY DOT. DAM 7/31/18 A CA G. AT THE FIRST SIGN OF TRENCH FAILURE, A TRENCH SHALL BE IMMEDIATELY BACKFILLED WITH MATERIALS CONSISTING OF A-1, A-3, A-2-4 SOILS OR A-4 SOILS HAVING A MAXIMUM OF 45% PASSING A rp�� '9EAL NO. 200 SIEVE AND A MAXIMUM P.1 OF 8. ALL WORK SHALL CEASE, THE DIVISION ENGINEER SHALL BE CONTACTED. THE PARTY OF THE = SECOND PART SHALL BE REQUIRED TO REPAIR ANY DAMAGE TO THE Zc> 'I= PAVEMENT CAUSED BY THE EXCAVATION. B. NO PART OF ANY PIT SHALL BE WITHIN THREE FEET OF EDGE OF ,�5rsolls Srr PAVEMENT OR BACK OF CURB. G DESCRIPTION BY REVISIONS © 2014 NORRIS & TUINSTALL SEWER NARRATIVE CFPUA PUMP STATION 26 AND FORCE MAIN INSTALLATION Wilmington, North Carolina For Echo Farms, LLC c/o Matrix Development Group, CN 4000, Forsgate Drive Cranbury, NJ 00512 (732) 521-2900 and Cape Fear Public Utility Authority 235 Government Center -Drive Wilmington, NC 28403 (910) 332-6415 ``���tttuttn�itutttrrrt����I� !� GAR �p + coo 9. Y � •��� Q 0 .,.• Git.•• GJ 111f1Nertitt;rtitt�tttNt�, Revised August 2018 (For State Sewer Submittal) December 2017 Prepared by: NORRIS & TUNSTALL CONSULTING ENGINEERS, P.C. 902 Market Street Wilmington, North Carolina 28401 (910) 343-9653 (910) 343-9604 (Fax) License # C-3641 N&T Project # 16084 SEWER SYSTEM NARRATIVE CFPUA PUMP STATION 26 AND FORCE MAIN INSTALLATION This submittal is for the upgrade of the existing Cape Fear Public Utility Authority (CFPUA) Pump Station 26 and the installation of new forcemains from pump station. Pump Station 26 is owned and operated by the CFPUA. Pump Station 26 Pump Station 26 is located on Appleton Way within the Echo Farms development. Based on provided as -built plans, the pump station consists of an 8-foot diameter wet well, with Gorman Rupp suction lift pumps. The existing pumps with electrical and controls are within a brick / block structure. Based on CFPUA drawdown testing results of 10-22-15, the existing 10 HP Gorman Rupp pump pumped at an average rate of 135 GPM at 70 TDH. The existing pumps are 3" pumps, which do not meet current NC DEQ Minimum Design Criteria. Based on the CFPUA provided design basis flow for Pump Station 26, plus the new development flow, the existing 10 HP pumps and the existing 4" forcemain will not handle the proposed flow. Therefore, the pump station and forcemain will be required to be upgraded. The existing Gorman Rupp suction lift motors / pumps of Pump Station 26 will be upgraded to 15 HP 4" pumps and the forcemain will be required to be upsized to a be 6" in diameter. The pump station will be designed to pump at 300 GPM at 63' of total dynamic head. The new forcemain for Pump Station 26 to the Barnards Creek gravity sewer outfall will be run within the Appleton Way right-of-way from the station to the Carolina Beach Road right-of-way. From there, it will parallel the Carolina Beach right-of-way to an existing SSMH near the Moose Lodge Property. Variances Required 1. Pump Station 26 is existing and to our knowledge hasn't been flooded, even during recent hurricane and extreme rain events. See attached e-mail from Gary McSmith of the CFPUA. The pump station was original constructed around 1973 or 1974. The pump station upgrade project requires larger pumps and controls to be updated within the existing block / brick veneer building. The pump Station also gets a new generator. The pump station force main gets upsized from 4" to 6". Per MDC, the pump station FFE and generator are required to be 2' above 100-yr flood elevation. The finished floor elevation of the existing building is 9.18 and the generator pad is approximately 9.1. The based flood elevation per firm maps by surveyor for this area is BFE of 9. The existing pump station and generator does not meet this MDC requirement. The CFPUA has stated that they are not aware of the pump station flooding during the large rain events and storms. See attached email from Gary McSmith of the CFPUA. Pump Station 26 will require a variance from the requirement for pump station FFE and generator to be 2' above the determined 100-year flood elevation. 2. The existing Pump Station 26 is surrounded by wetlands on three (3) sides and wetlands are within 50' of wetlands. Therefore, the existing pump station does not meet the MDC separation requirements. Pump Station 26 will require a variance due to its existing proximity to the existing wetlands. SS"t-azte. of North. Carolffift Department off' '.Environ.mentavdNatura Resourees o 'Water Resqou.reeus A-NCE/,.k'LTERi*4ATI'VFDF.-SlCwN.REQ EST 15A NCAC (12T.01.05 NALRI DivIslort of W--- Ater P. u e so irces VADC 10-14 & SUPPORTING DOCUMENTATION XJ 4pplication Number: (If -appik-able. to he completed: by'D W-R" 1. APPLICANT INFORMATION.. I. Apt lica.nt's nalme: Qape.'F.ear Pu'H. 04, tY Author'ty I pe- Ind- ldual fa .R.,, Applicant ty E []- General Pa riv tely.-O Corporation P wnied Public Utility Federaf state iviunwnail county I Signatu. re auth ority's n,a rne -.. Matt Tribgt. .5 CAC-02'L.). T, #d e: p em r E.narrizice J 114,nagrer 4App lica nt"s mailing address: 213 5 Govemment. Center Drive City., WflrniM;_ton:5tat,,�,- NC 2,84,01- S. A pff .p fcarls. n T I>honL-�.-number,,(210)'.1.3-2-,641...S. Em:alil. Add: ess- Matthm.Tribe ra it. PROJECT INFORMATION4. 1. Nroject n -Aft-mD, -Stagion 26 Ungt& 2. Project status::r­1 Proposed it Number, ExIsfing (If e.xistl' ng,;Rerm 111. CONSWANT INFORMATION' 1. Professiona I En nee r., Tun I I gi John. S.,. -sta. -License N* u mi ber Firm Stalt- con-�uffing EnVne Kalfing:ad-drIe'ss: 902, "MArket S C4•W -a-ton, State. Zip: 28401: ­4n on- n , xgm be ,EO 3 2� Eft. i W.- - VARIA NWEA�Q-U Tl� Il. Provldea-d.etalled li.st.of.specifi.c-c-tite-ria't*hat'a vadanc_.J� request 41ssto-bn,4tv?-dJ.or:-#' (e.g.l NCAC-02-10305ffl - Separation, M.DC for `:gym Statio6s-] Force ..'Mla.ins.3.04(*A)(1).(.b)- - Discharge. Piping- Velocity etc) We -are. jigggsifigg M ..om.Dierl.M.Q.-1gnign.riiis cc L dent r in ape Fear ...U611 A. thor' 'FPUA P Ut' n .2.6; - PU mv Station.2 jS. d: .a -uomr%di�ofthe exist' aC Ho V Ym, tN r S 4...e nd 1_3 to o grated by!.Lhg. CFWA gmd was, orifyi gLed, in 19-73 or 1974 Purqp St 26 —Pumv -Station 26 1 -t- I e4 as;-buih via & S 10cated onADDleton Wav w4hin the ftho Farms.,: ovelonment. Based -on nr0i n tie e ex 96 onsi' !� of 8.flbptdjamgt� 11,with Gorman Ru g, leetrk. "I mid exa -g q.h...l io.ck rateo,..fflVg.T"_ .5. the m3" gum whic.Q.t N Bn'th.ro '.�dgd des'p -basis flow,for EMW vt Ile )MM no 'he.ex+t.Stm`--,_u 1-0 HP,.pm.. ps anOt - g_ - sting 4 - -force. mai'lAlLing-t handglh us t develt. t: - w. t h e new e PLO-Mw....Jomthepumslation and fac0mair1,be.Te e wded, `the Stitis!aorm.an _)n Sualgo-lift. motors 1Wf - "'on 26 yvill be upded 4Runipsand the fceM !r to be -amic head:, upsi.zed. to ap fi" di. wr, The-2-u—mv �S_tatn,nlufll be., dgsigned to. pum- Xafiqj 4- 6 pt FOKM: VADC 1.0-1.4 Page 1. of 2 �-Sate of North Oarofi MIR -tm -nt of Environment and Natural.ke.sources, 101r urces- Div, IS1. of wate j.cw �,s Aw bf- Water Resources 15A NCAC (11T.01,05 V[A'.. CF, AIAERNATIVE DES' GN REQ U.F ST VADC','10-14 & SUPPOIZTI*.N'(-,'. DOCUMENTATION .......... . ... ....... ..Creek..-gravt WHI bewnvlith, The new force m,, �,Tn U111P."Stat.1 6.26 to -the ja M j w AP-P leafighl�qLwa. ..from. the station to thg,Q�- _EO)ing 8-eitch Road fi� g,-ht-qF!-wA Fromntherg'. ft Will.- aralch. Kai . . . ... ........ . ............... . .. w- p ixfth in ri �-�jrht- af-wa-v to L.- afi an 194. ,9't.prqj1ect requires. PUM, el Pumn.i-D.Station').6 was origingi.,constructed-arc- u-n.d::I:97*', jq�r., ...The.pum. stat+ a n Lip V- S � a n.. Cont.-GAs-to, be up —dated )-within t.he g-g block 'br--lxc;k,- velle 14ding -.j-it .0 -p st, ze s. a. .e;w 2p,.. tor. The P r91.0 are re Ab pump Amion 4" -to: (6) theDurn, -qtat..i' F i:n -sl7.CG T.rOm. U; red above. MDt-w -flood devAtio.n-. The of 918'..and the. is ie �n Q� pi-OxImately 9, 1 Tbg-jased. flood ele%.-vat"on ner fil aw bv UrNsy.-pr fbr this a"rea-i-s RFE Of-91, T A h t are- not g.3yage -ma annd this TVIDC pgM�s, ion 9- oodwn' dar1mg.; eveD -.a n 26 =1e 14T Its: ridstprms. ';S.ecgttObbie.-d-e.mai rai i. (3,g .1-g-p"t `h JA. P L.- M. Statim -n b f d -e CFPL tance from the req vr 2.1 -for- them- ex'sling n .-pum. statio. and eenerator to! bg th d tem-u e. d, IN e yea r flond.: _vat MUM - is -0 ewer SyLstem 305ft) K nh' m S a 1.5-A,NCAr The a.flon. 26 wethands cm three (").jLrdma an 'Amileton'A nA ��..mxmslino- pump'st I Aa—sgmov4eod..� bv. A-Ictlandsaret within. MI!, bf die... -.u. m-v' -id on. The -1 in ion q m 'et the]NI --doe tAt t. e P twtion 26 vd] I mouire a variance + to thal .r,OR.rvl: VA.DC. 10"14. A-v N.,ge 2 Gf 2 Ap.p.ticant's, Ceirtifitation per 1. CAC.02TAIP k L-bj MWI " tore A thoritys name. & tMe. from Req. e. t 1. em .3 U-S t. (Project name fro' kbequest item 11.1.1 MW st that th J s -.,t r ge U d. e pa has: been reviewed 'by me. and Js accurate and co M lete� to.,,th b est of rn kh -W 1. tand' ' st if all re. W d irts Of a so: n, em. th q Ir -quire, s 'WO an achm�e ts are not nad -dled, this th is req pest pack a,*ge are not C.O.-Mpleted and. thait if J: re', d -up-porting I --d att n I U I a ere le -e -ndie -s -at by �certWng. this van" r ej shall' dh to the reique:�t package will be: return.ed to me� as incom P. t 1 u r. � tand, th once que I re 'remeas of the vart' pro I sho .1 'proved and 4 1;j ance. ap va u d ift Al 1. pet. M-k condition. s should theperm a proved. it be P atement� y. personwho kh in* ly ak ... any If Ise st-- N .0 3: OTE — In, accordance with Giener I Staww- � -215.6A and 1-43-2-115 a . 'es.14 art ow . g. it es a est k g h* -e 'in :rod representation. or p- TICatlion in any requ paic a e shall be guilty of a. �Class 2- misdemeanors W tch, may In ud a P t d P as S. :'I - kip 0 V10110tion exceed $10,,000. .::.1 a Ci V makies kip- $2, .0 0 er :A Signatuire, AA Date.,:. . . . ......... :Ce Professi.anal En6heer's 0.06a.W.qn.;�. I A Itts its r -_-atftthafth tfor a I M P81 W R 'S. Onal E. nee. IJU sh e O'M em �Ai�l"�Y114lL'�F�R��It1 rojeanam e, fra� Re uest Ite q _0 :143 Im f s Aate-ve .W py ccorda.-n- c e", �Mdtfi --Genioral Statutes _15., 1143-:2.1 e n ..a A andl p,rson who knowmi.; -oa. s a:nv gui t...i ,r M iqu - s,1031 i U ass mist e ..oh. ma.. md le ne t to eft -b t H '' f 1 0-- ", ` I- -u..d 8 --FW ge- III �be why U-6n, I n, a- re. ..resentatio' r-tificat re ha 2 meanor whaj 1. p � .. ­q 1. 1 . . .., I . I . . .... ­.. � ., 1. - I ­ I... I I I.... ... I. H - �. no W. exce . e $10,0010:.�-A§ oil as Ct -Perva-Mves.gip to $25�0.00 per: viplat on. N..Q.rtb. Carb lln6 Peo ional E seal ure n gin.eer j�a a CAN 0., 0 M.1. iA -1 ... 5 FORM VADCA 0- 14 Pagp .3 f .2 L C-ONSUIXING' ENIGINEERI'Z.R.C, �RR=miagton2, NC 28401 -(-10 343-9604F-xx 'John STtutstA RE, 'I`jitson Olark, RE. se jr, August 13, 2018. PERCS Und Supervisor NC.DEQ. Division of Weer Resources -A 1.617 Mail Service Center Raleigh, NC 2.76-99 'Re.': State Sewer Varia' nce I. l rni ative. D esigVA. D C I U­ 14) Q Pump Stabon. 2:6 Upgrades Wilmington, NC :N&"r, P "ect No. 16084 rOj I Dear Sir or ad:.am: Ash, NC 27MV20 I.Pli ip No-ts, R. e i I fla M C) . anancupgraden FS are: req'uesfing two (2) variano sfrom the KnImum DesignCrite ..(MDrequireme t .4. -ty -A) ve request. Is for the the. exisiting Cade Fear Foals Utility Authon (CFPU. hum. -Ston 2. P" ump ton 26 is owned and operated y the C FPUA and was ors mall constructed Ire 1'3 or 1974. "th"n --thei-Echo Farms developm-,,�Ont Based on. Pump. Stabon. 26 i's locat,ed. on Appleton'Way wi . i 6 a 4� t ts oo -m - an rovided'as buil plans - the p u, , I . eter we. w._ 11 W h Gorm mp sTation consis - of an 8-4 t:d";a - "thelect'' I an. c.o UPP SU 'ca' d nt ,R ction IR -pumps. i ne -existing pumps -W.1 ri rols, are wn.nin a, DnQK :stuctr-edaseO'-CFUA dn tesresuls Of 10-15teexistn 1 OHGormanru_..d nPrawdotint2.-ThiP g g RU UMpmdn aVerage- r*, ame of * 13 5. GPM 'a" t 70 ;TRH. x1stin are U PS eil- - 4. g p m U pumpst Which do'not meet current NC DEQ Minimuni Denign -GOteria, B-;�sedon the CFR A. provided design basis flow for Pump;Station 26- plus the new developmentflow, the exisbbg 10 HP Pumps and the existing 4 f6rce main Will not handlethe' propos.e.....d., flow.., Therefore. thepump !m91.,a0. 'fionnd or will rqure.d, . isinGoman Rupp sucion ji 0left ded to 15 HP 4 pumps and theJorce matnw­ ill .be -required to: be upsized to a be 6"- 4n diometer, The pump -station wi"'11 be dest" ned to pump at ..9 300 sGPM at 6X of totaldyn.amic* head. The new force main for Pump Station 26 'to the Ba.'Imardsr :GOe-ek- gravi.ty sew'e , be. run outfa 11 W1, W within the Appleton Way right-of-way from the station to the Carolino 'beach Road right-of-way-. 44i i From there, it. will i parallel the Carolina Beach Road w -, itnin right-of-way to an existing SSM on the Bamards Creek sewer outfalf. NCBELS License: C-3641 Unit Supervisor / N:G DE-Q-Division Ot"Nater Resource-,s 13, 2018 Page 2 Variances Reouired I 6A NCAC 02T.0306 I MDC 3.03(C)(1)(b) Pump Station 26 was original c-,onsf-ructed arourid. 1191.3 or 1974. The pump station upgradepr 'ect requires larger pumps and controls to be updated witWn the -exng block (11 .1 I-Stl brick verseer building. The pump Station al.so:gets a new generator. The; pump station -s at'on Force main gets ups.1'.7-edfrom 4" to .6". Per MDGA t-he pump t I FFE and generator are required to be 2' a-bove- 1 00-yr flood elevation. The finished d- floorele"ors of the exi ng building 'is 9.18. and. the generator pad is, approximately 9. 1. The based flood elevation per firm M--aps by surveyor for thi I s area is s SFE of 9. The tin ion an" generator doess not meet this MDC require-ment. The CFPLJA has stated that they are. not aware of the pump station flooding during the Ia-i-irge ra-in events and storms. See aftached ema.11 from Gary McSmith of the CFPUA. Pump Station 26 w0l require a vance from the requitemeOt for the exisbng pump station FFE and generator to be 2 abode the determi;ned 1 00-year flood elevation 2. 1 SA NCAC 02T,0306(f) — Minimum Separations fo-r Sewer Systems The e-Xisfing Pump Station 26is surrounde. d by -wetlands on three (3) sides apd.Appleton Way on the North side. The wetlands are with"'n 5.0' of the pump statbn, Th -erefore.- the existn-g- pu m-p stattion does not meet the MDC mint.murn separation re-quIrements fro exisfing poxim-rryAo wetlands (50), Purnp Station 26 wiff] require a va'ance due Wits rthe extsung wetta-inds. Enclosed is one (1fi plus one (1) copyof the appfiG*ation form (VADC. 44)-w -o , and t. - �(2) 10 co -pies of individual plan sheets (Cover Sheet and G1 htwin g pUmp station elevatio Ia 6 ns yout and wet-land's.). Please review th'isimformabon forapproval and contact us with. any quesbons or comments. you. may have.. Thank you for your: assistance. on this rtae... p .. - - L "-nfir.8 ,Af .1 t. NORRIS &. TUNSTALL CONSULTING ENGINEERS, P,..C,, let S. NA N JohS. Tuns-ta.1.1, RE. T/asn Enclosures Amy Norris From: Gary McSmith <Gary.Mcsmith@cfpua.org> Sent: Thursday, May 3, 2018 2:22 PM To: John Tunstall Cc: Carel Vandermeyden; Rebecca Cramer Subject: PS 26 and 27 flooding history report Hi John, In regards to your inquiry into the history of flooding at the subject pump stations where you are designing a retrofit solution for pending development: CFPUA staff is not aware of any instance where flooding reached the slab of either building since the formation of our organization in 2008, nor are long time former City of Wilmington employees aware of this condition ever existing even during major storm events. As discussed, it is our policy during any retrofit to raise electrical components, as appropriate by regulations. In the case of the slab elevations at these location, our staff has never seen or observed any indications of them flooding from storms or high water in adjacent creeks. I think that it is highly likely that the current slab elevations are sufficient, given that this is an existing station and not an area prone to flooding. Best Regards, Gary McSmith, P.E. Assistant Director of Engineering Cape Fear Public Utility Authority 235 Government Center Drive Wilmington, NC 28403 910-332-6629 Desk 910-833-4197 Cell ROY COUPEIR, Govomor MICHAEL S. P;,EG.AN LIN Disk CULPEPPEIR h-tren"n P11recror NORTH CAROLINA Environmental Qualifty? November 1, 2018 Matthew Tribett, P.E., Engineering Manager Cape Fear Public Utility Authority 235 Government Center Drive Wilmington, NC 28403 Subject: Variance Request Approval CFPUA Pump Station 26 & 27 Upgrades Cape Fear Public Utility Authority (WQCS00012) New Hanover County Dear Mr. Tribett: The Division of Water Resources (Division) has reviewed the submitted variance request received on, August 14, 2018 with additional information received September 28, 2018 for the upgrades to Pump Station 26; and the variance request received November 1,, 2018 for the upgrades to Pump Station 27. The Division will grant the variance requests for the upgrades of Pump Station 26 and Pump Station 27, in accordance with the provisions for alternative design under 15A NCAC 02T.0105(n): 1. Pursuant to the variance, requests received on August 14,, 2018 with additional information received September 28.,2018 for Pump Station 26 and on November 1, 2018 for Pump Station 27., both from John S. Tunstall, P.E. on behalf of the Cape Fear Public Utility Authority, a variance is granted for the -construction and operation of the upgrades to both Pump Station 26 and Pump Station 21 located within 50-feet of wetlands, as indicated on the provided plans and supplementary documentation. a. Per the provided plans and supplementary documentation, the proposed upgrades shall include the following items: i Watertight pipe connections consisting of a flexible watertight rubber boot or compression type connector. ii. Watertight hatches on the existing wet wells. 2. An alternative design is approved for the existing pump station finished floor elevations and replacement generator pads for both Pump Station 26 and Pump Station 27, located less than 2-feet above the 100-year flood, in accordance with the provided plans and supplementary information. Regardless of the variance approval, in the event that the wastewater collection facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action I including those as may be required by this Division,, such as the construction of additional or replacement facilities. ............ North Carolina Department- of Environmental Quality 1 Division of Water Pescurces rl - r - -0) Ca - -olint;� 2*7699-161Y 51-2 North Salisbury Street 11617 Mail Service Center I Ra!eigh, NV 919.707.9000 Cape Fear Public Utility Authority — WQCS00012 November 1, 2018 All other elements of this project shall be constructed in accordance with all applicable rules and statues including., 15A NCAC 2T; the Division of Water Resources' (Division) Gravity Sewer Minimum Design Criteria adopted February 12, 1996 as applicable; and the Divisions Minimum Design Criteria for the Fast - Track Permitting of Pump Stations and Force Mains adopted June 1. 2000 as applicable. Approval of the variance request does not constitute approval of the permit. If you have any questions, please contact Christyn Fertenbaugh at 919-707-3625 or via email at Sincerely, for Linda Culpepper Interim Director, . Division of Water Resources by Deborah Gore,, PERCS Supervisor Division of Water Resources., NCDEQ cc: John S. Tunstall,, P.E., Norris & Tunstall Consulting Engineers.. P.C. (,Lt'LmListal Wilmington Regional Office, Water Quality Section (electronic copy) Water Quality Central Files — WQCS00012 PERCS Files (electronic copy)