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HomeMy WebLinkAboutNC0047384_Authorization to Construct_20180321 (2)City of Greensboro T. Z. Osborne WRF Authorization to Construct No. Issued March 21, 2018 047384A05 CORRECTED Engineer's Certification RECEP/cn,nr.NF-(1OWR APR -3 2018 Water r,esouroes Permitting Section I, \Qv j A Me e H e i s e r) P. E, , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe ,full time) the construction of the modifications and improvements to the T. Z. Osborne Wastewater Reclamation Facility, located in Guildford County, hereby state that, to the best of my abilities, due care and diligence was used in the observation of the following construction: Demolition of existing traveling bridge tertiary filter components and retrofit of six (6) new diamond cloth filter systems into the existing filter concrete structures, each system filter area is 2,560 ft2 nominal 10 gm and is to include backwash pump and other filter support features, specified filter system spare parts, piping, and controls; installation of one (1) new chlorine contact chamber with dual 47.2 ft x 52 ft basins, influent channel, post aeration cascade, effluent channel, parshall flume, single influent line liquid chlorination injector/diffuser, single submerged liquid sodium sulfite solution diffuser, dual 600 GPM at 42 ft THD 15 HP submerged drain pumps (one per basin), piping, and controls; demolition of existing specified liquid chlorination feed system and installation of five (5) new 80 GPH at 30 psi THD liquid chlorination solution metering pumps with direct DC motor control, piping, and other controls; demolition of existing liquid sodium sulfite feed system and installation of four (4) new 10 GPH at 30 psi THD liquid sodium sulfite solution metering pumps with direct DC motor control, piping, and other controls; demolition of existing PACL solution metering system and installation of six (6) new 120 GPH at 30 psi THD PACL solution metering pumps with direct DC motor control, drip systems, piping, and other controls; installation of one (1) new 36 ft diameter Fcum pre t) ..c- iev,ed 10 o (2) 150 CPM at 30 p3i TI ID 10 IIP pump �l^�v\Ye` i�"`t _ ..ith VF d iv.> (1) 1 inch infirm rrrindnr 1 50 GPM HP n n V"64c pro—s + {crr • r aee�a a{i��--r--�r rs -fir rre r o l:4 � fiF-r—P{P{n�, and CQrlti'�1G. P upgradc of (6) cxi ;tini primary-acttlinsg tanks scum pumps. four (4)-400 CPM at'0 tt DWR A •}o C. TDI 15 HP, ttiw (2) 330 CPM at 11 ft TIID 5 HP, piping. and controls; installation of new 54 inch diameter gravity flow outfall line from existing junction box, adjacent to existing 54 inch outfall line, including modification of the existing outfall structure and NPW piping to accommodate second discharge pipe; in conformity with the project plans, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources. Page 1 of 2 1 certify that the construction of the above referenced project was observed to be built within substantial compliance, intent and in conformity with all applicable regulations and statutes and the project plans, specifications, and other supporting documentation comprising the Authorization to Construct Permit Application package. Signature Date 3 /2.9 A 8" Mail this Certification to: Registration No. 1 3+-8"1 Attn: Bing Bai Complex Permitting Unit DENR/DWR/Water Quality Programs 1617 Mail Service Center Raleigh, NC 27699-1617 ATA NCDENR North Carolina Department of Environment and Natural Resources Pat McCrory John E. Skvarla, 111 Governor Secretary November 7, 2014 Steve Drew Director, Water Resources City of Greensboro 2602 South Elm -Eugene Street Greensboro, North Carolina 27405 SUBJECT: Authorization to Construct A to C No. 047384A05 City of Greensboro T. Z. Osborne WRF Dear Mr. Drew: A letter of request for an Authorization to Construct was received October 6, 2014, by the Division of Water Resources (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 40 MGD T. Z. Osborne WRF, with discharge of treated wastewater into the South Buffalo Creek in the Cape Fear River Basin. This authorization results in an increase in design and permitted capacity to 56 MGD, and is awarded for the construction of the following specific modifications: Demolition of existing traveling bridge tertiary filter components and retrofit of six (6) new diamond cloth filter systems into the existing filter concrete structures, each system filter area is 2,560 ft2 nominal 10 pm and is to include backwash pump and other filter support features, specified filter system spare parts, piping, and controls; installation of one (1) new chlorine contact chamber with dual 47.2 ft x 52 ft basins, influent channel, post aeration cascade, effluent channel, parshall flume, single influent line liquid chlorination injector/diffuser, single submerged liquid sodium sulfite solution diffuser, dual 600 GPM at 42 ft THD 15 HP submerged drain pumps (one per basin), piping, and controls; demolition of existing specified liquid chlorination feed system and installation of five (5) new 80 GPH at 30 psi THD liquid chlorination solution metering pumps with direct DC motor control, piping, and other controls; demolition of existing liquid sodium sulfite feed system and installation of four (4) new 10 GPH at 30 psi THD liquid sodium sulfite solution metering pumps with direct DC motor control, piping, and other controls; demolition of existing PACL solution metering system and installation of six (6) new 120 GPH at 30 psi THD PACL solution metering pumps with direct 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Phone: 919-807-63001 Internet: www.ncwaterquatity.org An Equal OpportunityAffirmative Acton Employer Steve Drew Director, Water Resources November 7, 2014 Page 2 of 4 DC motor control, drip systems, piping, and other controls; installation of one (1) new 36 ft diameter scum pre -concentrator with mechanical rakes/baffles, surface sprays, overflow weir ring, one (1) 200 GPM at 14 ft THD 2 HP drain pump, two (2) 150 GPM at 30 psi THD 10 HP pumps with VF drive, one (1) 4 inch inline grinder 150 GPM 3 HP, piping, and controls; upgrade of (6) existing primary settling tanks scum pumps, four (4) 400 GPM at 20 ft TDH 5 HP, two (2) 330 GPM at 14 ft THD 5 HP, piping, and controls; installation of new 54 inch diameter gravity flow outfall line from existing junction box, adjacent to existing 54 inch outfall line, including modification of the existing outfall structure and NPW piping to accommodate second discharge pipe; in conformity with the project plans, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources. This is the final phase (Phase III) needed to complete requirements to operate a 56 MGD facility. Engineer Certificates for 047384A03 (Phase I) and 047384A04 (Phase II) must be received by the Division indication completion of all approved items in conjunction with the final Engineer Certificate for this permit before the 56 MGD expansion is allowed. This Authorization to Construct is issued in accordance with Part III, Paragraph A of NPDES Permit No. NC0047384 effective July 1, 2014, and shall be subject to revocation unless the wastewater treatment facilities are constructed in accordance with the conditions and limitations specified in Permit No. NC0047384. 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 Division. 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 the Division, such as the construction of additional or replacement wastewater treatment or disposal facilities. The Winston-Salem Regional Office, telephone number (336) 775-9800, 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 permitted facility has been installed in accordance with the NPDES Permit, this Authorization to Construct and the approved plans and specifications. Mail the Certification to: NPDES Unit, DWR/DENR, 1617 Mail Service Center, Raleigh, NC 27699-1617. 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 Steve Drew Director, Water Resources November 7, 2014 Page 4 of 4 If you have any questions or need additional information, please contact Ron Berry at telephone number (919) 807-6396. Sincerely, Thomas A. Reeder, Director Division of Water Resources/NCDENR cc: James Butcher, P.E. CDM Smith 5400 Glenwood Avenue Suite 300 Raleigh, NC 27612 DWR/Winston-Salem Regional Office, Water Quality Programs Central Files NPDES File Without Engineer's Certificate attached: Guilford County Health Department