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Home My WebLink AboutWQ0040918_More Information (Requested)_20190807ROY COOPER Governor MICHAEL S. REGAN Secretary LINDA CULPEPPER Director JOAN LEE — VICE PRESIDENT MURPHY-BROWN, LLC POST OFFICE BOX 856 WARSAW, NORTH CAROLINA 28398 Dear Ms. Lee: NORTH CAROLINA Environmental Quality August 7, 2019 Subject: Application No. WQ0040918 Additional Information Request Ag Protein Trailer Wash Wastewater Irrigation System Duplin County Division of Water Resources' Central and Regional staff has reviewed the application package received May 28, 2019. 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 September 6, 2019. 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, or failure to provide the additional information on or before the above requested date may result in your application being returned as incomplete. 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 two paper copies and one electronic copy. If you have any questions regarding this request, please do not hesitate to contact me at (919) 707- 3660 or tessa.monday@ncdenr.gov. Thank you for your cooperation. Sincerely, /ew/ -t A,� Tessa Monday, Environmental Engineer Division of Water Resources cc: Wilmington Regional Office, Water Quality Regional Operations Section (Electronic Copy) Joshua Outlaw, PE — Smithfield (Electronic Copy) Permit Application File WQ0040918 D EQ �� North Carolina Department of Environmental Quality Division of Water Resources 512 North Salisbury Street 1 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 NORTH CAROLINA DepadmamofEnmron—WQuality /� 919.707.9000 Ms. Joan Lee August 7, 2019 Page 2 of 3 1. The application needs to be organized in the order of the application items. Each section should have a cover page and table of contents (if applicable). All specifications need to be in one section and signed and sealed by a PE. All calculations need to be in one section and signed and sealed by a PE. 2. Per 15A NCAC 02T .0505(b)(2), lagoon treatment systems shall meet a monthly average of BOD < 30 mg/L. The proposed treatment system does not meet this requirement. Application Table V.1. must have the designed effluent concentrations and meet the required limits. A review of other truck wash permit effluent monitoring has the following averages: Ammonia 123 mg/L, Total Nitrogen 1.5 mg/L, TKN 162 mg/L, and Phosphorus 45 mg/L. Provide more information to justify the proposed designed effluent concentrations. 3. Per 15A NCAC 02T .0504(c)(2), the lagoon specifications should include the proposed tile drain installation. 4. Per 15A NCAC 02T .0505(1), provide an alternative design criteria (signed and sealed by a PE) request addressing all of the following: a. Facility has a private water supply that automatically shuts off during power failures and does not contain elevated water storage tanks; b. Facility has sufficient storage capacity that no potential for overflow exists; and c. Facility can tolerate septic wastewater due to prolonged detention. Per 15A NCAC 02L .0103(b) and based on the results of the 2019 groundwater sampling, previous activities at the site have impacted the groundwater quality. Exceedances of 15A NCAC 02L .0202 - Groundwater Quality Standards have been documented for nitrates in monitoring wells AG-1 and AG-7, and zinc in monitoring well AG-5. These monitoring wells are located either within, or up gradient from the eastern compliance boundary. Given the proposed nutrient loading and direction of groundwater flow, violation of groundwater quality standards beyond the designated compliance boundary may occur. In order to comply with 15A NCAC 02L .0103(b), it must be demonstrated that the proposed irrigation fields will not result in 15A NCAC 02L .0202 exceedances at the compliance boundary. Therefore, the Division requests that predictive hydrogeologic modeling be submitted. Modeling should demonstrate that the standards established in 15A NCAC 02L .0202 are met at the compliance boundary and the proposed operations shall not result in violations of groundwater quality standards beyond the compliance boundary. The Division's document entitled Groundwater Modeling Policy should be referred to regarding modeling details. Additionally, to comply with 15A NCAC 02T .0504(e)(8), an addendum including the predictive model calculations, must be submitted discussing post operation flow from the proposed facility, focusing on the relationship of the system to groundwater receptors, groundwater discharge features, and groundwater flow media. Ms. Joan Lee August 7, 2019 Page 3 of 3 6. An additional series of sampling events is required to further characterize site conditions for model implementation. The Division will require that groundwater monitoring wells be installed downgradient from the proposed irrigation fields. The approximate locations of proposed monitoring wells are shown in the attached figure. Future sampling should include groundwater sampling and seasonal water table elevation data at MW-1 through MW-6, AG-1 through AG-8 and at L-1 through L-4. Lat Long MW-1 34051'37.76"N 780 7'9.66"W MW-2 34051'39.07"N 780 7'4.67"W MW-3 34051'43.59"N 780 7'6.75"W MW-4 34051'49.43"N 780 7771"W MW-5 34051'53.36"N 780 7'12.55"W MW-6 34051'46.77"N 1 780 7'17.01"W