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' EEC S 1462 01 UniFirst Stockton September 24 2004 • Total xylenes were detected at a concentration of 0 062 mg/kg in sample A5 • No other TPH constituents or VOC compounds were detected ' 7.3 Soil Disposal On January 3, 2004, approximately I49 tons of soil generated during from the UST release remediation activity were transported by Denbeste to Chemical Waste Management, Inc in Kettleman City, California A copy of the Waste Manifest is included in Appendix E ' 7 4 Water Disposal As a result of the UST release and subsequent remediation operations, approximately 30,000 gallons of water and product was pumped into the two Baker tanks The first Baker tank (BT-1) contained 18,000 gallons of water and approximately 2,000 gallons of product This tank was ' used to collect the water and product removed during emergency response activities on December 1 ], 2003 The second Baker tank (BT-2) contained approximately 10,000 gallons of water, with minimum amounts of product BT-2 was used primarily to contain rain water that had accumulated in the excavation during the course of the site activities ' On January 16, 2004, Phillips Service Corporation (Philips)was retained to remove, transport and dispose of the water/oil mixture from the tanks Phillips utilized a 5,000 gallon capacity vacuum truck to remove the majority of the product from the Baker tanks The vacuum truck removed the majority of the product by skimming the water/oil surface Absorption pads were utilized to complete the product removal Once the product was removed to a sheen in each tank, EEC collected a representative water sample to determine disposal options for the remaining water Disposal of water in the Baker ' Tanks is regulated by the City of Stockton, Department of Municipal Utilities Samples were collected under the direction of Frank Tucker with the City of Stockton EEC used a discrete depth water sampler to collect samples from three different depths within the tank The three ' samples collected from each tank were combined into one composite sample, placed on ice, and transported to Cal Tech Laboratories under proper Chain of Custody for analysis of Total Recoverable Petroleum Hydrocarbon (TRPH) by EPA method 8015 and benzene, toluene, ethylbenzene, and xylenes(BTEX) and fuel oxygenates by EPA method 8260 The results of the analysis for BT-2 revealed minor concentrations of TRPH All BTEX and fuel oxygenates were below the detectable limits Sample BT-I contained concentrations of TRPH at ' 40 ppm and low concentrations of BTEX and fuel oxygenates Results of the laboratory data were submitted to Frank Tucker to determine the proper disposal options for the water On January 26, 2004, EEC received a verbal approval from the City of Stockton, Department of Municipal Utilities to discharge the water contained in BT-2 into the sanitary sewer EEC received written approval on January 29, 2004 A copy of the permit for wastewater discharge is included in Appendix K On January 27, 2004, under the approval of Mr Tucker, the majority of the water contained in BT-2 was discharged into the sanitary sewer connection at the subject site A small amount of water from BT-2, approximately 1,000 gallons was inadvertently discharged into the storm drain All water contained to BT-1 was pumped into vacuum trucks, hauled offsite and disposed of at an appropriate facility 13