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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. WASTE DISCHARGE REQUIREMENTS IIJJ FOR DEGROOT AND SONS, A&J FOODS, INC. , AND CHIRON CORPORATION WASTEWATER DISPOSAL TO LAND SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds that: 1 . DeGroot and Sons, A&J Foods, Inc. , and Chiron Corporation (hereafter � (� Dischargers) submitted a Report of Waste Discharge, dated 15 January 1991. u v A&J Foods, Inc. , and Chiron Corporation generate process wastewaters from cheese and yeast production, respectively, which the DeGroots dispose of for them. The DeGroots own the land on which the A&J Foods and Chiron Corporation have their facilities, and dispose of the process wastewaters from the facilities on adjacent property also owned by them. The Assessor's Parcel Number for this property is 195-050-16. A&J Foods, and Chiron Corporation are named in these requirements because they generate the wastewaters. DeGroot and Sons own and operate the wastewater treatment and disposal facilities and are responsible for implementing these requirements. 2. The DeGroot and Sons accepts wastewaters from A&J Foods and Chiron Corporation as part of a lease agreement with these two companies. A&J Foods generates up to 22,000 gallons per day (gpd) of cheese whey from L!� cheese manufacturing. The cheese whey contains 2-3% protein solids and is heat treated to 195°F to kill all cheese culture. Chiron Corporation grows DNA-altered yeast for use in pharmaceutical manufacturing. Wastewater generated by Chiron amounts to approximately 8600 gpd of reject from a freshwater reverse osmosis unit and 2500 gallons per week of. fermented broth containing 2-5% yeast cells that have been killed by a hypochlorite solution. Chiron also generates low volumes of washwater, boiler blowdown and stormwater runoff that are discharged into the wastewater collection system. 3. The Dischargers discharge the collected wastewaters to an unlined evaporation/percolation pond with a capacity of approximately 3,000,000 gallons. The pond is located across Airport Way from A&J Foods and Chiron Corporation on farmland owned by DeGroot and Sons. See Attachment A, incorporated herein and made part of this Order. Wastewater is applied periodically with fresh water to cropland by flood irrigation. The evaporation/percolation pond and irrigated farmland are the designated n disposal areas. in addition, the Discharger occasionally discharges the \�\J!/ wastewater to an irrigation ditch with eventual discharge to a runoff containment pond for a cattle feed lot on the Discharger' s property. Wastewater discharged to the latter pond is stored for evaporation. 4. Board staff has received numerous complaints of obnoxious odors emanating from the Discharger' s wastewater treatment and disposal practices. The Discharger has installed an aerator in the storage pond to help maintain a IE sufficient dissolved oxygen concentration in the pond and is also looking at methods to reduce the BOD, load on the pond.