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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. WASTE DISCHARGE REQUIREMENTS FOR TRIPLE E PRODUCE CORPORATION GROUND WATER TREATMENT AND DISPOSAL FACILITIES SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board)finds that: 1. Triple E Produce Corporation (hereafter Discharger) submitted a Report of Waste Discharge (ROWD), dated 24 June 1995, and a site evaluation report, dated 12 July 1995. On 22 November 1995,Triple E Produce requested the ROWD be amended so that the ground water treatment and disposal waste discharge requirements (WDRs) be made separate from those for the industrial wastewater treatment and disposal operations. This Order will only be applicable to the Discharger's ground water treatment and disposal facilities. T 2. Triple E Produce Corporation operates a fresh market tomato packing facility that uses E chlorination for preparing tomatoes for market. The Triple E facility is on Linne Road, near the town of Carbona in the NW 1/4 of Section 10,T3S,RSE, MDB&M as shown in Attachment A, N which is attached hereto and part of the Order by reference. 1 3. Ground water beneath the Dischargers' property is contaminated with trihalomethane (THM) T constituents resulting from the discharge of chlorinated tomato wastewater to infiltration pond. A The extent of the contaminated ground water goes from the Discharger's property to L� approximately 1500 feet north of Linne Road . The primary THM of concern is chloroform, a T byproduct of the Discharger's tomato preparation operations. T 4. Chloroform in the ground water has been historically as high as 1,900 µg/1 with a more recent I average (Mar 94 through Mar 95) of approximately 500µg/1. In an effort to lower the chloroform T concentrations in the ground water the Discharger has been using in-situ bioremediation V techniques since May 1993. The bioremediation technique has been some what successful, E however,it has not stopped the migration of the plume. 5. In an effort to control the migration of the chloroform plume in groundwater the Discharger has proposed to pump approximately 25 gpm of chloroform contaminated ground water from extraction wells and treat it through an aeration process at an existing aeration pond north of the Linne Road, as shown on Attachment B, which is attached hereto and part of this order by reference. 6. During the summer months when the evaporation rates are greatest, it is estimated that all but approximately 3 gpm of treated ground water will be either evaporated or percolated from the aeration pond. During the winter months it has been estimated that approximately 10 gpm will have to be disposed of in an alternative manner. Treated ground water that does not evaporate or percolate from the pond,will be pumped to the tomato wash water treatment plant for further treatment prior to being sprinkled onto sixteen acres of apricots adjacent the Discharger's tomato packing facilities,see attachment B. 7. The extracted ground water will be aerated in the existing aeration pond to both strip the chloroform from it and to add oxygen so the water repercolating into the ground water will aid in the continued bioremediation efforts. 8. The site lies within the hydrologic unit/area/subarea No. 543.00, as depicted on interagency hydrologic maps prepared by the Department of Water Resources in August 1986.