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Home My WebLink About310090_Add-Info Response_20240920...... - w . ENGINEERS • MANUFACTURERS • CONSTRUCTORS Ms. Christine Lawson Engineer III Animal Feeding Operations NCDEQ Department of Water Resources SUBJECT: Additional Information Request Application No. ADS310090 B&C Farm Duplin County Dear Ms. Lawson, 9200 Watson Rd. Suite 200, St. Louis, MO 63126 0 (314) 729 - 0055 t, www.roestein.com : r 20 September 2024 B&C Farm Application No. ADS310090 Please see below for responses to the request for additional information, dated September 18, 2024, in relation to the digester permit application for Paradise Hill Farm. The original Additional Information Request is attached. o Missing Lagoon/storage pond Capacity Documentation • The volume calculations for existing Lagoon 2 have been attached. o Liner (baseliner) Thickness • The liner is a 60-mil HDPE. The Digester Narrative has been updated to reflect this. Please see revised narrative attached. o Digester vs Lagoon • All details in the drawing package correspond to the new digester. Detail RA-STD-251-2, RA-STD-255-2, RA-STD-269, which reference "lagoon" in their title, will be revised to reference "digester". These revisions will be included in the as - built documents. Please let us know if you have any further comments or need any further information. Thank you. Sincerely, Roeslein & Associates, Inc. G;�4�1 - Chris Fey Manager, Building Design & Construction Page 1 of 1 ROY COOPER Governor ELIZABETH S. BISER Secretary RICHARD E. ROGERS, JR. Director Barney M. Rhodes B&C Farm 409 John Stanley Bostic Road Rose Hill, NC 28458 Dear Barney M. Rhodes: NORTH CAROLINA Environmental Quality September 19, 2024 Subject: Additional Information Request Application No. ADS310090 B&C Farm Duplin County The Animal Feeding Operations Program of the Division of Water Resources (Division) has completed a preliminary review of the subject application received on June 28, 2024 and additional information received September 3, 2024 and September 10, 2024, for permit coverage under Swine Farm Digester Waste Management System General Permit AWG400000 for the construction of an anaerobic digester to capture biogas as a part of the proposed farm digester system at the B&C Farm. Additional information is required before we may continue our review. Please address and submit the following item(s) within 30 (thirty) days of receipt of this letter. ❑ Missing Lagoon/storage pond capacity documentation (design, calculations, etc.) Lagoon capacity documentation was provided for Lagoon 1 but not for Lagoon 2. ❑ Liner (baseliner) thickness — The application (page 12) states that the baseliner will be 80-mil thick HDPE. Elsewhere in the documents and drawings, it's shown as 60-mil thick HDPE. Please clarify. ❑ Digester vs. Lagoon - throughout the drawings (for example Drawing RA-STD-251-2, RA-STD- 253-2, RA-STD-255-2, ...) the documents refer to details/designs for the Lagoon. However, these details and designs appear to be for the digester. Please confirm that these details are for the digester and provide a full list of the drawing pages/details that are label "Lagoon" that are intended for the "Digester". Corrections should be made for all appropriate design drawings and submitted with the as -built drawings. 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 responsibility of the applicant. In addition, any omissions made in responding to the above items shall result in future requests for additional information. Please reference the subject application number when providing the requested information. All revised and/or additional documentation shall be signed, sealed and dated, submitted to my attention at the address below. Failure to provide this additional information on or before the above requested date may result in your application being returned as incomplete. North Carolina Department of Environmental Quality I Division of Water Resources 512 North Salisbury Street 1 1636 Mail Service Center I Raleigh, North Carolina 27699-1636 NORTH CARCLINA 919.707.9129 Barney Rhodes ADS310090 Additional Information Letter September 19, 2024 Page 2 of 2 If you have any questions regarding this letter, please feel free to contact me at (919) 707-3664 or Christine.Lawson@deq.nc.gov. Sincerely, Signed by: V-1, 15. (Awsbvu 715598463EA94B7... Christine B. Lawson Engineer Animal Feeding Operations cc: Wilmington Regional Office, Water Quality Regional Operations Section — via email Roeslein & Associates, Inc. — Chris Fey Laserfiche — File No. 310090 REQ5 North Carolina Department ofEnvironmental Quality I Division ofWater Resources 512 North Salisbury Street 1 1636 Mail Service Center I Raleigh, North Carolina 27699-1636 NORTH CAROLINA 919.707.9129 onparhnem of EmironmanW 9uallly 1parator:BARRY RHODES County: DUP[-:.Z Date: 09/06/94 )istance to nearest residence ( other tt::;:. owner) : 2800.0 feet ,. AVERAGE LIVE.WEIGHT (ALW) 0 sows (farrow to finish) 1417 lbs. - 0 lbs 0 sows (farrow to feeder) 522 lbs. - 0 The 2448 head (finishing only) 135 lbs. = 330480 lbs 0 sows (farrow to Wean) 433 lbs. - 0 The 0 head ( wean to feeder) 30 lbs. = 0 lb,s Describe other Total ,rage Live Weight 3a0480 lbs ?. MINIMUM REQUIRED TREATMENT VOLUME c„ LAGOON Volume = 330480 lbs. ALW x atmen.t . Volume.(CF) /lb. ALW Treatment Volume(CF)/lb. ALW = 1 CF./lb. ALW Volume = 330480 cubic feet 3.rSTORAGE VOLUME FOR SLUDGE ACCUMULA-i' d Volume = 1 0.0 oubic feet }. TOTAL DESIGNED VOLUME Inside top length (feet) ----- --------"--- Inside top width (feet) ------ -----....__-_-- Top of dike elevation (feet) ------------- Bottom bf lagoon elevation (f >------------ Freeboar4 ,(feet)------------- - ------- Side slopes (inaide lagoon)-- ------------- Total design volume urging Pri, idal formula SS/END1 SS/END2 SS/SIDE1 E DE2 LENGTH 3. ® 3.0 3. 0 ;3. 0 296.0 AREA OF TOP LENGTH * WIDTH = 296.0 209.0 AREA OF BOTTOM LENGTH * WIDTH = 230. 0 143.0 AREA OF MIDSECTION LENGTH WIDTH .* 4 263.0 176.0 CU, FT. T [AREA TOP + (4%AREP: P 4 1.0- A 1% 9 s 302.0 215.0 52.9 4069 1.0 3.0 1 WIDTH DEPTH 209.0 11.0 '.54 (AREA OF TOP) 390 (AREA OF BOTTOM) 02 (AREA OF MIDSECTION * 4) ?SECTION) + AREA BOTTOM] * DEPTH/6 . at 32890.0 1.8 . TEMPpRARX STORAGE REQUIRED DRAINAGE AREA: Lagoon (top of dike) Length * Width = 302.0 215.0 64930.0 square feet Buildings (roof and lot water) 0.0 square feet TOTAL DA 64930.0 square feet Design temporary storage period to be ;A. Volume of waste produced Describe this area. 180 days. Feces & urine production in gal -,day per 133 lb. ALW Volume = 330480 lbs. ALW/105 li , ALW 1.37 gal/day Volume = 603677 gals. or 60M.5 cubic feet aB. Volume of wash water 1.37 180 days Thiv iS the amount of fresh w" tf;: • used for washing floors or volume ,of fresh water used for a flush L:.ystem. Flush. systems that 'recirculate the lagaAn water are accountel frr in 5A. Volume = 0.0 gallons/day 180 days storage/7.48 gallons per CF Volume 0.0 cubic feet 5G. Volume of rainfall in excess of a ap - •-ati.on Use period of time when' rain:i�xl xceeds evaporation by largest amount. 180 days excess rainfall - 7.0 inches Volume = 7.0 in DA / 12 inches per foot volume = 37875.6 cubic feet 5D. Volume of 25 year - 24 hour storm Volume = 7.0 inched / 12 in zee per foot * DA Volume = 37875.6 cubic feet TOTAL REQUIRED TEMPORARY STOR: GE 5A. 80705 cu",,ic feet 58. 0 cuI)ic feet 5C. 37676 cubic: zeet 5D. 37876 cull.i c. feet TOTAL 156457 cif'- ` feet �. SUMMARY Temporary storage period==== 180 days Rainfall in excess of 7.0 inches 25 year - 24 hour 7.0 inches 1.0 feet Side slopes==========---==�_=___ ____.._..____> 3.0 : 1 Inside top length=R ======== _: 302.0 feet Inside top 215.0 feet Top of dike elevation==xx=-= ___ _______--_> 52.5 feet Bottom of lagoon elevation===-- 40.9 feet Total required volume====--==_-486937 cu. it. Actual design volume,=T===--- __________> 513161 CU. It. Seasonal, high watertable el RV 1 (SHWT)2==> 46.0 feet Stop pumping 48.8 feet Must be > or = to the SHWT t _--- ==-=>, 48.0 feet Must be > or = to min, req. tment el. 46.9 feet Required' minimum treatment vc:-_________> 330480 cu. ft. Volume at stop pumping LPIRva T=----==-= 333584 cu. ft. Start pumping elev.==----===_-______-___> 51.0 feet Must be at bottom of freeb� 25 yr. rainfall Actual volume less 25 yr.- 2,A rainfall==> 475285 cu. It. Volume at start pumping elevc, 458702 cu. ft. Required volume to be pumped= -----_-___> 118581 cu. it. Actual volume planned to be --_______> 123118 cu. it. Min. thickness of soil liner 2quired,=> 1.8 feet .• r'b 8Y : DESIGNED BY: SATE : DATE; y 1' NOTE- SEE ATTACHED WASTE UTT PLAN COMMENTS`: t Operator: = = == == CARRY RHODES Gourr€y:== 091094 Dist.to nearest residence (other loan owner): 2500 ft. sows (farrow to finish):=== . sdws (farrow to feeder) : odor): > dead (finishing only) = == = _ 2448 sows (farrow to wean):= == = _ head (wean to feeder):= = = r = Ave. Live Weight for other operstions(lbs,)= r Storage volume for sludge accum. (cu, ft):= =• Treatment'VolumG (min.1 c u. ftAb.)=---==_ =- -0 25 Year — 24 Hour fWnfall 7-0 Rainfall in excess of evaporation (in.)=====:, 7.0 Drainage area of buildings & lots (sq. ft.)=> Volume of wash water (galionsfday) = = = = — — — — - ... „-. Temporary storage period de s)==--=__ v vYV on-----------------�— Side slopes (inside lagoon) 3.0 : 1 Insidetop length inside tap width (ft.): 215.0 5' g Top of dike elevation (ft.):==__---_____=_ __> Bottom of lagoon elevation ft): = = _ _ = = _ _ _ _ _ > 40_9 Seasonal high water table(SHWT) elev-0Q:=:. 48.0 Torol required volume:===== ==.-==== 406937 cu. ft. I*TDTALVOL 0X** Actual design Walurne:====== ======= 513161 cu. ft- 105. k Stop -pumping el.(r or = to 48.0 ft_SH > 48.8 (:• or = to. 45,9 ft.Min ) Required minimum treatment volume: 33M cu. ft. **TRMT. VOL O.K** Volume at stop pumping elevation_ 335584 cu. ft_ 101 MP/0 Start puMpmg eiev..=y__===,= 51.0 volume ats'�rtpumping elevation: 458702 cu. ft. "ISTORl1A STOR. O.K.** Actual volume le: s yr-24hr rain: 475285 cu, ft. 103.820A DOTE. Verify that temp_ storage is adequate: Rea. volume to be pumped: _ _ _=> i i $581 cu_ ft **T1=MR- VOL Q.K.** Actual volume to be pumped: ==> 123118 cu. ft. 103.$3% s� ROESLEIN ENGINEERS • MANUFACTURERS • CONSTRUCTORS 27019 - B&C FARMS Digester Narrative Monarch Bioenergy LLC — Register, NC Swine RNG Project A1000 Digester Narrative R&A Project RA270-23 Issued 240820 Farm will utilize existing barns with slotted floors over flushing pits to collect manure. The farm operators use pull plug system and recycle water for flushing to manage the animal manure. As part of this current project, a new anaerobic lagoon digester will be installed, and the animal manure will be redirected to the new digester. After treatment in the in anaerobic digester, the effluent will flow into the existing lagoon. There is no change to the existing farm operations, nor the volume of wastes generated. The effluent water will be recycled back to the barn for pit recharge or irrigated in accordance with the existing Waste Utilization Plan (WUP). Upon flushing, the wastewater from B&C FARMS Barns 1-2 will be directed into a properly designed lift station through a 12-inch diameter gravity pipe header. There will be two pumps in the lift station wet well and each pump is designed for 100% of the design flow. The lift station pump will be 10 hp GEA pump, designed for a flow of 426 gpm (1 pump) through a 6" HDPE (DR17) force -main into the new anaerobic digester. Upon flushing, B&C FARMS Barns 3-6 will be directed into a properly designed lift station through a 12- inch diameter gravity pipe header. There will be two pumps in the lift station wet well and each pump is designed for 100% of the design flow. The lift station pump will be 7.5 hp GEA pump, designed for a flow of 413 gpm (1 pump) through a 6" HDPE (DR17) force -main into the new anaerobic digester. The approximate dimensions of the new anaerobic lagoon digester are 330 feet by 170 feet with a total volume of 477,936 cubic feet and a treatment capacity of 371,640 cubic feet at operating level. Before the excavation, the project area is stripped approximately 6 inches of topsoil and will be stockpiled. Embankment material will be free of sod, roots, and other objectionable material. The maximum thickness of each compacted layer will be 6-inches and compacted to 95% of Standard Proctor at -1 to +3 percent of optimum moisture content per ASTM D698. Each lift shall be tested for moisture and density. The stockpiled topsoil will be spread on the outside bank. After the construction the lagoon, and all required pipe penetrations, the inside walls of the lagoon will be smooth rolled prior to the installation of the baseliner. The baseliner will be 60-mil thick HDPE synthetic liner. After the liner is installed, it will be tested for leaks prior to filling the lagoon with wastewater. There will be an outlet structure with a weir (level control) that keeps the water level inside the digester at a constant level. The effluent will gravity flow through a 12-inch diameter digester outlet pipe to the level control wet well and gravity feed into the existing lagoon through a 12-inch diameter pipe. Water will be transferred back to the existing lagoon 27519A by a floating 15HP GEA transfer pump in lagoon 27519B at a rate of 486 gpm through a 6-inch diameter HDPE SDR 17 force -main. s� ROESLEIN ENGINEERS • MANUFACTURERS • CONSTRUCTORS Monarch Bioenergy LLC — Register, NC Swine RNG Project A1000 Digester Narrative R&A Project RA270-23 Issued 240820 Once the lagoon is within in 2 feet of the normal operating level, a floating cover will be installed to capture the biogas produced by the anaerobic digestion of the organic wastes in the wastewater. The captured biogas will be treated to produce renewable natural gas (RNG) by a micro -gas cleaning skid (micro-GUS). Tail gas from micro-GUS will be vented to atmosphere, with levels documented in PAD letter.