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VALLEY AG <br /> R E S E A R C H <br /> June 5, 1999 <br /> FOR: Frank& Carol Borba <br /> 13845 South Brennan Road <br /> Escalon, CA 95320 <br /> PROJECT: New F&C Borba Dairy Facility <br /> NWC Escalon-Belota Road and Dodds Road - Escalon <br /> SUBJECT: Holding Pond Sizing and On-Site Soil Characteristics <br /> The San Joaquin County Department of Environmental Health has requested data and <br /> information on two parameters of the wastewater holding pond for the new F & C Borba Dairy. <br /> Specifically, the Department wants assurance that the holding pond has sufficient capacity as <br /> designed, and secondly, that the indigenous on-site soil characteristics will support a 1:1 inside ' <br /> embankment slope. <br /> HOLDING POND REQUIRED CAPACITY (ESTIMATED) <br /> PROJECTIONS: The following information is supplemental to the attached"SIZING A <br /> DAIRY MANURE HOLDING POND WORKSHEET." The proposed dairy may ultimately <br /> milk 1,000 Holsteins, with the support stock numbers referenced. Dry manure will be used as 1 <br /> bedding with the remaining volume sold for off-site use. Wastewater storage duration during the <br /> rainy months must be 120 days (December-March). Solids separation will be accomplished by <br /> three separation basins to maximize separation and minimize solids accumulation in holding <br /> pond. Separation basin storage capacity for solids and liquids is not considered in the <br /> calculations. Solids separation by the separation basins is estimated at 65%. Rainfall runoff <br /> from roofed areas will be pipelined to the cropland. Majority of the concrete areas will be <br /> covered. <br /> HOLDING POND CALCULATED CAPACITY <br /> The holding pond is proposed to be 650 ft long, 125 ft wide and 20 feet deep with a five foot <br /> above grade embankment for a total depth of 25 feet. Freeboard to be two feet. Inside slope is to <br /> be 1:1 and outside slope to be 3:1. Embankment road to be approximately 14 feet wide. The <br /> following formula determines the capacity of the proposed holding pond: <br /> UNIT ABBREVIATIONS <br /> LW=Liquid width, ft - . . -, LW=EW- 2 x FB x S <br /> EW=Earthen holding pond width, ft ' LL _ EL - 2 x FB x S <br /> FB =Freeboard, ft LD =ED - FB <br /> S = Side slope (1;1 horizontal:vertical) <br /> LL=Liquid length, ft <br /> EL=Earthen holding pond length, ft <br /> LD=Liquid depth, ft <br /> ED=Earthen holding pond depth, ft — <br /> P.O.Box 3794 Turlock,California 95381 (209)668-1403 1 Fax (209)668-2598 <br />