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HomeMy WebLinkAboutNC0020346_AUTHORIZATION TO CONSTRUCT_20080925 e NPDES DOCUWENT SCANNlNO COVER SHEET NPDES Permit: NC0020346 Magnolia WWTP Document Type: Permit Issuance Wasteload Allocation uthorization to Construct (AtQ Permit Modification Speculative Limits Compliance Report Instream Assessment (67B) Environmental Assessment (EA) Permit History Document Date: September 25, 2008 This dvcuxnenwt is pxdlmted va muse paper-iaavre aay c:vxxtw-mt au the reverse side Town of Magnolia A To C No. 020346AOI � Issued August 23. 2005 �4 `ti ' i Engineers Certification I. David T. Upchurch as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically/weekly/full time) the construction of the modifications and improvements to the Town of Magnolia WWTP, located on West Faison Street, Magnolia in Duplin County for the Town of Magnolia, hereby state that, to the best of my abilities, due care and diligence was used in the observation of the following construction: Wastewater Treatment Plant Upgrade-- Complete and in use • demolition of existing 0.08 MGD wastewater treatment plant and existing effluent outfall structure at Millers Creek, existing sludge drying beds and sand filters, and various yard piping. • microscreen rated at 0.626 MGD installed into the existing headworks structure. • influent hump station consisting of three (3) 220 gpm pumps, • dual extended aeration activated sludge treatment reactors, consisting of dual 22,900 gallon pre-reaction chambers, and dual 100,700 gallon aeration basins, with fine bubble diffusers, and dual 397 scfm, 15 Hp air blowers. • Dual 20-foot diameter, 120foot side water depth center-fed secondary clarifiers, • dual mircroscreen drum filters, • a UV disinfection unit consisting of two (2) channel banks in series, • 900 gallon post aeration chamber using diffusers, • an effluent pump station consisting of three (3) 220 gpm, 10 Ilp vertical turbine pumps, and effluent flowmeter. dual 50 gpm pumps for non-potable water in-plant use, • one WAS/RAS pumping station with two 350gpm submersible pumps with two 4" dia. telescoping valves, • a 500 gpm, 8 Hp sludge transfer pump next to existing sludge digester, • a 89,900 gallon sludge digester with fine bubble diffusers, with dual 224 scfm, 10 Hp air blowers, • a�sludge loading station (for trucks) with 500 gpm sludge transfer pump, and • a 972 square-foot operations/lab building. • Associated electrical work, including one 150 kW and one 40 kW emergency generator with automatic transfer switch, and instrumentation. Effluent Force Main and Outfall--Complete and in use Construction of a 6.1 mile effluent force main and outfall at Stewarts Creek, to serve the Town of Magnolia, to consist of. • approximately 32,057 linear feet of 8-inch effluent force main, five (5) air release valves, 2 manholes, a concrete discharge outfall structure, and associated appurtenances, } Town of Magnolia A To C No. 020346A01 Issued August 23, 2005 in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources. Engineer's Certification, continued I certify that the construction of the above referenced project was observed to be built within substantial compliance and intent of the approved plans and specifications. We understand that the new limits associated with the modifications to expand to 0.25 MGD now apply. Signature X !• ZRegistration No. Pate 7-3 46) H' q'Ro,����, u••°�FsSSfp�. Send to: Construction Grants & Loans Q DENR/DWQ - 3 $ a Atto. Cecil G. Madden, Jr., P.E. r ° 1633 Mail Service Center ,,,vtN-�.a°Q,G�� Raleigh, NC 27699-1633 UpC N aim M M = � = . Hobbs, Upchurch & Associates, P.A. VJ4 Consulting Engineers 300 S W. Broad Street Southern Pines, NC 28387 September 23. 2008 Linda Willis NC D E N R 127 Cardinal Drive ENtension. 0 \V11iiiini4t.011, N.C. 28405 P. Re: Town of%, 'lagnolia Upgrade Project No. E-SRG-T-02-0130 Dear Linda: We have recently completed modifications to the RAS/WAS system at the Magnolia WWTP.'The new system is comprised of 2-350gpt-n pumps, 2- 4" telescoping valves, mist valves and associated piping. The pump discharge is located in the influent splitter box, which aiiows the flow to be directed to either side of the plant at the operators will. The system has been started and is operating properly At Gerald Horton's request we are forwarding a copy of the information that was sent to CG&L that includes, Record Drawings of the modifications and an updated Engineers CertificatiOn. We anticipate that the Town of Magnolia will be requestinv, that thu N'10ratOriUrn be lifted soon. 11'eve can provide any :assistance please do not hesitate to contact us. Sincerely, HOBBS, UPCHURCH & ASSOCIATES, P.A. Rick BOUnds, cc: Gerald Horton File Southern Pines, NC •Telephone 910-692-5616 . Fax 910-692-7342 a email: infc)Lhobbsupchurch.corn Myrtle Beach o Raleigh 9 Charlotte 9 Kill Devil Hills Hobbs Upchurch & Associates, P.A. Consulting Engineers NJ 300 S.W. Broad Street Southern Pines, NC 28387 September 23, 2008 Gerald Horton` ' NC Construction Grants and Loans 1633 Mail Service Center '� Raleigh; NC 27699-1633 Re: `Down of Magnolia WWTP Upgrade Project No. E-SRG-T-02-0130 Dear Gerald: Enclosed you will find a revised Engineer's Certification for the Magnolia WWTP. The revision is submitted due to a change to the plant's RAS/WAS system. • ', he original certificate certified two airlift RAS/WAS pumps. • This modification certifies one RAS/WAS pump station with t.vo 350gpm submersible pumps, two 4"dia. telescoping valves and associated valves and piping. The requirement for this change is due to a lack of adequate performance of the original airlift pu;�-.p system. The newly installed submersible pumps and equipment have been started and are operating correctly and efficiently. Record Drawings are included with this submittal. If you should have any questions regarding this matter, please do not hesitate to contact me. Sincerely, HOBBS, UPCHURCH & ASSOCIATES, P.A. Rick Bounds Southern Pines, NC .Telephone 910-692-5616 • Fax 910-692-7342 • email: info@hobbsupchurch.com Myrtle Beach . Raleiah . Charlotte + Kill Devil Hills f for wA7FgQ Michael F. L'asley,Governor G William G. Ross Jr.,Secretary North Carolina Department of I nvironmcat and Natural Resources -� flan W.Klimek,P.L.Director Division of Water Quality August 23, 2005 The Honorable Corbett L. Quinn, Mayor Town of Magnolia Post Office Box 459 Magnolia, North Carolina 28453-0459 SUKIF,C:T: Authorization to Construct A to C No. 020346AOI Town of Magnolia Wastewater Treatment Plant Upgrade Duplin County Project No. E-SRG-T-02-0130 Dear Mayor Quinn: A letter of request for Authorization to Construct was received April 26, 2004, by the Division, and final plans and specifications for the subject project have been reviewed and found to be satisfactory. Authorization is hereby granted for the construction of modifications to the existing 0.09 MGD Town of Magnolia Wastewater Treatment Plant, with existing discharge of treated wastewater into Millers Creek in the Cape Fear River Basin. This authorization results in an increase in design and permitted capacity to 0.25 MGD, a new 6.1 mile effluent force main and new discharge outfall at Stewarts Creek and abandonment of the existing oiEtfall at Millers Creek, and is awarded for the construction of the following specific modifications: Wastewater Treatment Plant Upgrade • demolition of existing 0.09 MGD wastewater treatment plant and existing effluent outfall structure at Millers Creek, existing sludge drying beds and sand filters, and various yard piping, • microscreen rated at 0.626 MGD installed into the existing headworks structure, • influent pump station consisting of three (3) 220 gpm pumps, • dual extended aeration activated sludge treatment reactors, consisting of dual 22,900 gallon pre-reaction chambers, and dual 100,700 gallon aeration basins, with fine bubble diffusers, and dual 397 scfi1n, 15 Hp air blowers, • dual 20-foot diameter, 13-foot side water depth center-fed secondary clarifiers, • dual microscreen drum filters, • a UV disinfection unit consisting of two (2) channel banks in series, • 900 gallon post aeration chamber using diffusers. Nc�i°f hCarolina )Vattiralllf North Carolina Division o1 Water Quality 1617 Mail Service Center Raleigh,NC 27699-1 6 1 7 Phone(919)7_13-7015 Customer Service Internet: h2o.enr.state.nc.us 512 N.Salisbury St. Raleigh-NC 27604 FAX (919)73 3-2496 1-877-623-6748 An Equal Opportunity/Affirmative Action Employer—5V.Recycled1141,o Post Consumer Paper The Honorable Corbett L. Quinn, Mayor August 23, 2005 Page 2 • an effluent pump station consisting of three (3) 220 gpm, 10 Hp vertical turbine pumps, and effluent flowmeter, • dual 50 gpm pumps for non-potable water in-plant use, • dual air lift RAS/WAS pumps, • a 500 gpm, 8 Hp sludge transfer pump next to existing sludge digester, • a 89,900 gallon sludge digester with fine bubble diffusers, with dual 224 scfm, 10 Hp air blowers, • a sludge loading station (for trucks) with 500 gpm sludge transfer pump, and • a 972 square-foot operations/lab building, • associated electrical work, including one 200 kW emergency generator with automatic transfer switch, and instrumentation, Effluent Force Main and Outfall Construction of a 6.1 mile effluent force main and outfall at Stewarts Creek, to serve the Town of Magnolia, to consists of: • approximately 32,057 linear feet of 8-inch effluent force main, five (5) air release valves, 2 manholes, a concrete discharge outfall structure, and associated appurtenances, pursuant to the application received on April 26, 2004, and in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources. This Authorization to Construct is issued in accordance with Part III, Paragraph A of NI'DES Permit No. NC0020346 issued August 15, 2005, and shall be subject to revocation unless the wastewater treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No. NC0020346. This Authorization To Construct is issued pursuant to T I 5A:2 H.02 I 9(p) for the construction of a reclaimed water utilization facility without flow equalization at the site of the Town of Magnolia WWTP. In the event that non-compliance with any condition or limitation contained in Permit No. WQ0028752 results from the absence of flow equalization, the Town's NPDES permit may be administratively reopened, and a requirement for the construction of a flow equalization basin may be incorporated into the permit. The sludge generated from these treatment facilities must be disposed of in accordance with G.S. 143-215.1 and in a manner approved by the North Carolina Division of Water Quality. in the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective action, including those as may be required by this Division, such as the construction of additional or replacement wastewater treatment or disposal facilities. The Honorable Corbett L. Quinn, Mayor August 23, 2005 Page 3 The Wilmington Regional Office, telephone number (910) 796-7215, shall be notified at least forty-eight (48) hours in advance of operation of the installed facilities so that an on site inspection can be made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. Upon completion of construction and prior to operation of this permitted facility, a certification must be received from a professional engineer certifying that the penmitted facility has been installed in accordance with the NPDES Permit, this Authorization to Construct and the approved plans and specifications. Mail the Certification to Cecil G. Madden, Jr., P.E., Construction Grants & Loans, DWQ / DENR, 1633 Mail Service Center, Raleigh, NC 27699- 1633. Upon classification of the facility by the Certification Commission, the Permittee shall employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater treatment facilities. The operator must hold a certificate of the type and grade at least equivalent to or greater than the classification assigned to the wastewater treatment facilities by the Certification Commission. The Permittee must also employ a certified back-up operator of the appropriate type and grade to comply with the conditions oFTl5A:8G.0202. The ORC of the facility must visit each Class I facility at least weekly and each Class 11, 111 and IV facility at least daily, excluding weekends and holidays, must properly manage the facility, must document daily operation and maintenance of the facility, and must comply with all other conditions ofTI 5A:8G.0202. A copy ol'the approved plans and specifications shall be maintained on file by the Permittee for the life of the facility. During the construction of the proposed additions/modifications, the permittee shall continue to properly maintain and operate the existing wastewater treatment facilities at all times, and in such a manner, as necessary to comply with the effluent limits specified in the NPDES Pcrmit. You are reminded that it is mandatory for the project to be constructed in accordance with the North Carolina Sedimentation Pollution Control Act, and, when applicable, the North Carolina Dam Safety Act. In addition, the specifications must clearly state what the contractor's responsibilities shall be in complying with these Acts. Failure to abide by the requirements contained in this Authorization to Construct may subject the Permittee to an enforcement action by the Division of Water Quality in accordance with North Carolina General Statute 143-215.6A to 143-215.6C. The issuance of this Authorization to Construct does not preclude the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction. The Honorable Corbett L. Quinn, Mayor August 23, 2005 Page 4 One (1) set of approved plans and specifications is being forwarded to you. If you have any Questions or need additional information, please contact Cecil G. Madden, Jr., P.E. at telephone number (919) 715-6203. Sincerely, lan W. Klimek, P.E. kplsd cc: David T. Upchurch, P.E., (Hobbs, Upchurch & Associates, Southern Pines Office) Duplin County Health Department Wilmington Regional Office, Surface Water Protection DWQ/Point Source Branch/NPDES Unit DWQITechnical Assistance and Certification Unit Daniel Blaisdell, P.E. Cecil G. Madden, Jr., P.E. Ken Pohlig, P.E. A to C File SRG