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INFORMATION SHEET INFORMATION SHEET TRI VALLEY GROWERS PLANT NO. 4 WASTEWATER DISPOSAL SITE SAN JOAQUIN COUNTY Tri Valley Growers (TVGs), Plant No. 4 is between Eight Mile Road and State Highway 99. TVGs, Plant No. 4 processes tomatoes and cherries. Water is supplied by two on-site wells. Fresh tomatoes are processed during the months of July, August, and September. The processing consists of washing, disinfecting, peeling, and canning. The remainder of the year, the plant processes cherries and reprocesses tomatoes into products. The cherry processing consists of stemming, sizing, pitting, halving and finally sending to vats where they are boiled and rinsed to remove the brine. The cherries are next dyed to their final color. The coloring materials are reused as much as possible prior to discharging. Other processes that generate wastewater include tank rinsing, equipment cleaning, tomato container washing, and general sanitation at the plant. Prior to discharging to the irrigation fields, the wastewater is combined in a concrete sump. The wastewater is then run across a parabolic screen to remove the bulk of the large solids which are collected and used for land application or animal feed. The wastewater is next mixed with the effluent of the catalyst converter/biotower system for odor control. The wastewater is then discharged to a delivery ditch before pumping to the irrigation fields. The facility flood irrigates up to 4.0 million gallons per day pf wastewater via pipes across Bear Creek to a 405 acre field during the peak months (July-September). The discharge is intermittent the remainder of the year. The facility is limited to 81 acres (north of Bear Creek) during the wet months by a restriction imposed by the U.S. Corps of Engineers for flood control purposes. The average percolation rate for the 486 acre field was estimated at 0.30 in/hr. The facility has five ground water monitoring wells. Ground water occurs 70 feet below the ground surface. The Discharger has been discharging at conductance level of 700 to 12,000 µmhos/cm. The higher conductance levels are normally characterize as designated waste under Title 23, CCR, Section 2510, et seq. (hereafter Chapter 15). A compliance schedule to evaluate salt loading to the disposal site has been added in E Provisions: 6 to comply with B. Discharge Specification 6