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HomeMy WebLinkAboutWQ0019907_Extension Request Letter_20230424tt ONWASA O: 910.937.7533 F: 910.347.0793 onwasa.com 228 Georgetown Rd Jacksonville, NC 28540 April 24, 2023 Lauren Raup-Plummer, PE Environmental Engineer III NCDEQ Division of Water Resources Non -Discharge Branch 1617 Mail Service Center Raleigh, NC 27699-1617 RE: Southeast Regional Water Reclamation Facility High -Rate Infiltration System Onslow County Application No. WQ0019907 Dear Ms. Raup-Plummer: As mentioned in prior correspondence, ONWASA has directed the engineering consultant on this project (The Wooten Company) to suspend all work efforts pending further evaluation of a potential facility acquisition as an alternative to construction of a new facility. Based on this work suspension, we are unable to provide the clarifications and updated project documents requested in your letter of March 23, 2023 (copy attached) We hope to have a final decision on whether to restart work or formally rescind the permit application in approximately four (4) weeks, and hereby request that the Division of Water Resources extend the due date for this response to May 31, 2023. That will provide sufficient time to make a final decision on the project and avoid having to resubmit the application and 4 supporting documents in the event the project does move forward. Thanks in advance for your consideration of this request, and feel free to contact me directly at (910) 937-7521 or dmohr@onwasa.com if you need additional information. Sincerely, APE David M. Mohr, PE Chief Operations Officer, ONWASA C: Franky J. Howard, CEO Jeffrey T. Lohr, PE, Engineering Manager (Distribution via email) ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director DAVID MOHR — CHIEF OPERATING OFFICER ONSLOW WATER AND SEWER AUTHORITY 228 GEORGETOWN ROAD JACKSONVILLE, NORTH CAROLINA 28540 Dear Mr. Mohr: NORTH CAROLINA Environmental Quality March 23, 2023 Subject: Application No. WQ0019907 Additional Information Request Holly Ridge WWTF Wastewater Irrigation System Onslow County Division of Water Resources' Central and Regional staff has reviewed the application package received February 3, 2023. However, additional information is required before the review may be completed. Please address the items on the attached pages no later than the close of business on April 24, 2023. Please be aware that you are responsible for meeting all requirements set forth in North Carolina rules and regulations. Any oversights that occurred in the review of the subject application package are still the Applicant's responsibility. In addition, any omissions made in responding to the outstanding items in Sections A through J, or failure to provide the additional information on or before the above requested date may result in your application being returned as incomplete pursuant to 15A NCAC 02T .0107(e)(2). Please reference the subject application number when providing the requested information. All revised and/or additional documentation shall be signed, sealed and dated (where needed), with an electronic response submitted to my attention at: https://edocs.de .iic.gov/Forms/NonDischar-,e-Branch- Submittal-Form-Ver2. If you have any questions regarding this request, please contact me at (919) 707-3660 or Lauren.Plummer@ncdenr.gov. Thank you for your cooperation. Sincerely, DocuSigned by: I �c�,une.n, Lauren l aup 6lummer, Engineer III Division of Water Resources cc: Wilmington Regional Office, Water Quality Regional Operations Section (Electronic Copy) Carl Scharfe, PE — The Wooten Company (Electronic Copy) Laserfiche File (Electronic Copy) E Q�� North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 n,�r�in cnNci.�Na � o.a,n��imum��me��iQw /� 919.707.9000 Mr. David Mohr March 23, 2023 Page 2 of 3 A. Overall: Our office has reviewed the two existing permits pertaining to this minor modification request, Holly Ridge Wastewater Treatment Facility (WQ0019907) and Summerhouse WWTP (WQ0029945). A major modification has been submitted to our office for the new treatment facility at Holly Ridge, and the proposed treated effluent design characteristics in that submittal were taken into consideration. The proposed major modifications for WQ0019907 include anew treatment facility designed to achieve effluent limits of 7 mg/L of total nitrogen and 3 mg/L of total phosphorous to meet the groundwater lowering setback requirement of 100 feet in accordance with 15A NCAC 02T .0706(b). The Summerhouse WWTP permit has an effluent limit of 2 mg/L of total phosphorus. This limit was established in the initial permit issuance dated May 23, 2006. Please provide information explaining how the effluent limit of 2 mg/L of total phosphorus at the existing Summerhouse infiltration sites will be met for treated effluent transferred from the new treatment facility at Holly Ridge. B. Cover Letter: 1. No comments. C. Application Fee: 1. Not applicable. D. Application (Form: WWIS 06-16): The response to Item IVA indicates that there is an attachment that lists applicable permits/certifications to the proposed modification at this facility. This attachment did not appear to be included in the submittal, and it is unclear whether any additional permits are necessary for the proposed construction activities. E. Property Ownership Documentation: 1. Please confirm that the entirety of the proposed alignment is either within the right-of-way or on property owned by ONWASA (and the Town of Holly Ridge) and that no additional easements are required to allow ONWASA access for construction and maintenance activities. F. Engineering Plans: 1. The profile views on Plan Sheet C-2.07 and C-2.08 have labels for a 16-inch PVC force main. Our understanding is that the proposed alignment for the effluent transfer main is to be constructed with 8-inch diameter piping. Please review and revise as necessary. 2. Sheet C-4.20 depicts a section of effluent transfer main that connects between the force main along Holly Ridge Road and the infiltration pump station. Is this portion of the effluent transfer main included in the 7,400 LF of 8-inch piping listed within the Project Narrative? The current plan and Mr. David Mohr March 23, 2023 Page 3 of 3 profile views depict Sta. 10+00 to 65+30, and it is unclear where the remaining piping is to be installed. 3. Within the plan view for the Pump Station effluent main on Sheet C-4.20, it appears that the force main is to connect between the pump station and the effluent transfer main along Holly Ridge Road. However, per Sheet C-2.06, an 8-inch temporary plug is proposed at Sta. 10+00. Please clearly depict a plug/stub-out on the effluent main to be installed within the pump station area. 4. Detail drawings were not provided. Please provide detail drawings for trenching/pipe installation, boring/jacking installation (please include any "spider" pipe supports and excavation/shoring requirements for the bore/jack pit), minimum horizontal and vertical separation distances for utilities, and appurtenances such as air release valves, valve boxes, temporary plugs, and manholes. G. Specifications: 1. Specifications for Boring/Jacking and Horizontal Directional Drilling installation methods were not provided. Please provide specifications for all proposed installation methods. 2. The provided leakage formulae on page 02530-15 do not appear to be in accordance with the most recent revisions of AWWA C600/C605 that are referenced. Please review the referenced AWWA standards and revise, if necessary. H. Engineering Calculations: 1. No comments. I. Site Map: 1. No comments. J. Threatened or Endangered Aquatic Species Documentation: 1. No comments.