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Home My WebLink AboutWQ0000798_More Information Received_20220329Initial Review Reviewer Thornburg, Nathaniel D Is this submittal an application? (Excluding additional information.) * Yes No If not an application what is the submittal type?* Annual Report Residual Annual Report Additional Information Other Permit Number (IR) * WQ0000798 Applicant/Permittee Brunswick County Email Notifications ................................................................................... Does this need review by the hydrogeologist? * Yes No Regional Office CO Reviewer Admin Reviewer Submittal Form Project Contact Information Please provide information on the person to be contacted by NDB Staff regarding electronic submittal, confirmation of receipt, and other correspondence. ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Name* Carter Hubard Email Address* tchubard@wkdickson.com Project Information Application/Document Type* New (Fee Required) Modification - Major (Fee Required) Renewal with Major Modification (Fee Required) Annual Report Additional Information Other Phone Number* 9107624200 Modification - Minor Renewal GW-59, NDMR, NDMLR, NDAR-1, N DAR-2 Residual Annual Report Change of Ownership We no longer accept these monitoring reports through this portal. Please click on the link below and it will take you to the correct form. hftps://edocs.deq.nc.gov/Forms/NonDischarge_Monitoring_Report Perm it Type:* Wastewater Irrigation High -Rate Infiltration Other Wastewater Reclaimed Water Closed -Loop Recycle Residuals Single -Family Residence Wastewater Other Irrigation Permit Number: * WQ0000798 Has Current Existing permit number Applicant/Permittee Address* 250 Grey Water Road NE, PO Box 249, Supply, North Carolina Facility Name* Shallotte WWTF Please provide comments/notes on your current submittal below. Add Info #4 Response At this time, paper copies are no longer required. If you have any questions about what is required, please contact Nathaniel Thornburg at nathaniel.thornburg@ncdenr.gov. Please attach all information required or requested for this submittal to be reviewed here. (Application Form, Engineering Plans, Specifications, Calculations, Etc.) Add Info #4 W00000798 Response.pdf 5.17MB Upload only 1 PDF document (less than 250 MB). Multiple documents must be combined into one PDF file unless file is larger than upload limit. * By checking this box, I acknowledge that I understand the application will not be accepted for pre -review until the fee (if required) has been received by the Non - Discharge Branch. Application fees must be submitted by check or money order and made payable to the North Carolina Department of Environmental Quality (NCDEQ). I also confirm that the uploaded document is a single PDF with all parts of the application in correct order (as specified by the application). Mail payment to: NCDEQ — Division of Water Resources Attn: Non -Discharge Branch 1617 Mail Service Center Raleigh, NC 27699-1617 Signature Submission Date 3/24/2022 W,.�WK II<SON March 24, 2022 Submitted via electronic copy to DEQ upload site Lauren Raup-Plummer,PE , Engineer III Division of Water Resources North Carolina Department of Environmental Quality 512 North Salisbury Street Raleigh, North Carolina 27699-1617 Subject: Additional Information Request #4 Application No. WQ0000798 Shallotte WWTF Brunswick County Wastewater Irrigation System Dear Ms. Plummer: In response to the Additional Information Request #4, dated March 21, 2022, to Brunswick County, requesting additional information for the above -mentioned project. The comments with responses in blue italics are provided on the following pages. Supplemental and revised documents are submitted here in as follows: Attachment 1- Application page Attachment 2- Revised Figures Attachment 3- Phosphorous Loading Calculation 300 N. Third Street, Suite 301 Wilmington, NC 28401 Tel. 910.762.4200 www.wkdickson.com Aviation • Water Resources 9 Community Development 9 Energy Ms. Raup-Plummer March 24, 2022 Page 2 1) The provided coordinates for the proposed well SA-1 are not correct, and this well feature also appears to be missing from the provided site map titled "Proposed Mulberry WWTP Overall" (the map only depicts two proposed wells near Field #14). Please provide the correct coordinates for the proposed wells. For reference, these are the provided coordinates from the most recently revised application form: V4'elI Name Status Latitude - Longitude' Gradient Location SA proposal 34°0'57.3" -078147'48-6" Down Gradictrt insidu ComplianccSounder S ? Proposed 34°0'52.3" -078n2'59.5" Up Gradient Inside Compliance Boundary SA 3 Proposed 3400'59.5" -078°22'46.0- Down Gradient Inside Compliance Bowidary The application sheet has been revised with corrected well coordinates and figure revised. See attachments 1 and 2. 2) Please confirm that the existing chlorine disinfection system located west of Lagoon 3 is capable of meeting the fecal coliform requirements while operating under the new lagoon configuration. Were calculations performed to assess the existing disinfection design? The new lagoon configuration provides for additional settling but no change to treatment. The existing disinfection contact is not altered. Therefore, no calculations have been performed. 3) Within the revised calculations for Phosphorus loading, we noticed that the total phosphorus values from PPI 001 and PPI 002 were averaged using an ordinary arithmetic mean. Can you please explain why this method was chosen over a weighted arithmetic mean approach that would address the differing flow conditions between the two sampling points? We have reviewed and revised the calculations for phosphorous loading using weighted average of the two existing lagoon influent locations. The revised average concentration is 4.52 mg/L of phosphorous to the new spray field. The revised calculations showing suitable spray area land for the updated phosphorus loading are provided in Attachment 3. IICKSON Ms. Raup-Plummer March 24, 2022 Page 3 4) Have the easements for the influent force main been acquired? Please note that not having the easements will change some of the language and conditions within the draft permit. The easements are still in the process of acquisition. We appreciate the comments received and your assistance with this project. Sincerely, W.K. Dickson & Co., Inc. K-4� cvz4l� T. Carter Hubard, PE Vice President & Wilmington Regional Manager Attachments: As Noted cc: NCDEQ Wilmington Regional Office, Water Quality Regional Operations Section (Electronic Copy) Ken Pohlig, PE, Division of Water Infrastructure (Electronic Copy) IICKSON ATTACHMENT 1 IV. GENERAL REQUIREMENTS —15A NCAC 02T .0100 (continued): 8. What is the nearest 100-year flood elevation to the facility? 25.2 feet mean sea level. Source: Flood Risk Information System, Nearest to the spray irrigation is a Zone A flood plain. Nearest to the existing Shallotte WWTF is a Zone AE flood plain with a base flood elevation of 25.2 ft. Are any treatment, storage or irrigation facilities located within the 100-year flood plain? ❑ Yes or ® No y If yes, which facilities are affected and what measures are being taken to protect them against flooding? A small LiLon of the proposed spray irrigation is located in a Zone A flood plain. There are many irrigation spray fields that serve the Shallotte WWTF. The total capacity of these spray fields is enough that not every spray field is needed everyday. Therefore should the proposed sprav irrigation field flood. the effluent can be diverted to other irrigation sprav fields. If yes, has the Applicant submitted written documentation of compliance with & 143 Article 21 Part 6? ❑ Yes or ❑ No 9. Has the Applicant provided documentation of the presence or absence of threatened or endangered aquatic species utilizing information provided by the Department's Natural Heritage Program? ® Yes or ❑ No 10. Does the facility have a proposed or existing groundwater monitoring well network? ® Yes or ❑ No If no, provide an explanation as to why a groundwater monitoring well network is not proposed: If yes, complete the following table (NOTE — This table may be expanded for additional wells): Well Name Status Latitude a Longitude a Gradient Location SA 1 Proposed 34000'57.2978" 078022'59.5664" Down Gradient Inside Compliance Boundary SA 2 Proposed 34000'52.2760" 078022'46.9137" Up Gradient Inside Compliance Boundary SA 3 Proposed 34000'59.5385" 078022'46.1165" Down Gradient Inside Compliance Boundary a Provide the following latitude and longitude coordinate determination information: Datum: NAD83 Level of accuracy: Nearest 101 of Second Method of measurement: Conversion from State Plane Coordinate. 11. If the Applicant is a Privately -Owned Public Utility, has a Certificate of Public Convenience and Necessity been submitted? ❑ Yes, ❑No or ®N/A 12. If the Applicant is a Developer of lots to be sold, has a Developer's Operational Agreement (FORM: DEV) been submitted? ❑ Yes, ❑No or ®N/A 13. If the Applicant is a Home/Property Owners' Association, has an Association Operational Agreement (FORM: HOA) been submitted? ❑ Yes, ❑No or ®N/A 14. Demonstration of historical consideration for permit approval — 15A NCAC 02T .0120: Has the Applicant or any parent, subsidiary or other affiliate exhibited the following? a. Has been convicted of environmental crimes under Federal law or G.S. 143-215.6B? ❑ Yes or ® No b. Has previously abandoned a wastewater treatment facility without properly closing that facility? ❑ Yes or ® No c. Has unpaid civil penalty where all appeals have been abandoned or exhausted? ❑ Yes or ® No d. Is non -compliant with an existing non -discharge permit, settlement agreement or order? ❑ Yes or ® No e. Has unpaid annual fees in accordance with 15A NCAC 02T .0105(e)(2)? ❑ Yes or ® No FORM: WWIS 06-16 Page 3 of 13 ATTACHMENT �WK Proposed Mulberry WWTP Overall o soo 1,000 ZO00 Feet WDICKSON Shallotte, North Carolina 1 in= 1,000feet community infrastructure consultants Revised 3/22/2022 ATTACHMENT 3 Section 3 Spray Application Loading Phosphorous Loading: Average Phosphorous Concentration 4.52 mg/L Discharge Volume 42,862 Gallons/day Uptake 60 Pounds/Acre Loading 590 Pounds of Phosphorous/Year Land Requirement 9.83 Acres 11.18 Acres Available Shallotte WWTP DMR Monthly Phosphorous 001 002 Mar-20 3.58 3.96 Apr-20 3.3 4.7 May-20 4.6 5.66 Jun-20 5.14 5.62 Jul-20 4.74 5.16 Aug-20 3.28 4.28 Sep-20 4.62 7.5 Oct-20 3.44 4.3 Nov-20 3.28 4.28 s•\A CA Dec-20 4.1 4.28 RO••.,,.,+ ;° Q' �i '•., Jan-21 3.6 4.3 �FESS/per � Feb-21 3.42 4.02 ?� 0249 4 e 05 'oy0tiGINE�� Average 3.93 4.84 .,,,•qs C Nv,,,.• •••................. Facility AVG 4.38 mg/L Mar 24 2022 9:28 AM Weighted AVG 4.52 mg/L Wastewater Treatment and Disposal for the City of Southport 20170253.00.WL