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Response and Cleanup of Sulfuric Acid Spill <br /> POSDEF Power Company,L.P. <br /> 2526 W.Washington St. <br /> Stockton,CA.95203 <br /> Page 4 of 7 <br /> environmental lab, CHROMA LABS for CAM metals and corrosivity testing prior to <br /> proper disposal. <br /> Wednesday,. July 19; 1995. POSDEF continued to remove soil that was less than pH 6. <br /> No soils were encountered with a pH less than 2 (non-hazardous soil). POSDEF <br /> continued to remove soil pursuant to the directions,of San Joaquin County Environmental <br /> Health Department. <br /> Thursday, July 20, 1995. POSDEF has requested a metallographic analysis on the failed <br /> pipe from Nalco Chemical Company's Analytical Lab. This analysis will determine if <br /> proper metallurgy was used and how the failure could have been prevented. Soil removal <br /> continues. <br /> Friday„July 21 1995. The soil removal with pH greater than 2 but less than 6 was <br /> complete by the end of the day. JL will gather a composite of the soil to be disposed and <br /> send it off via chain of custody to CHROMA LABS for CAM metals and corrosivity <br /> testing. <br /> Monday, July 24, 1995. POSDEF finished removing all of the soil affected by the spill <br /> of sulfuric acid as per the directive of Harlin Knoll, R.E.H.S., San Joaquin County, <br /> Environmental Health Division. A written request for sample verification was faxed to <br /> Harlin requesting his presence at 12:30 pm. POSDEF instructed JL Analytical to be <br /> ready with a sampling plan and appropriate sampling equipment. At 12:30 pm, Mark <br /> Jacobs from J.L Analytical Services, Inc. and Harlin Knoll arrived at the plant to extract <br /> samples of soil from where the affected soil had been removed for verification that <br /> removal was complete. Harlin, Mark and myself developed a sampling plan and began <br /> sampling. Ten samples were extracted into 6: brass cylinders long and placed into an ice <br /> chest at approximately 4 degrees centigrade immediately after sampling (see JL <br /> Analytical report enclosed). A chain of custody was generated and the samples were <br /> brought back to the lab for pH testing as per EPA Method 9040. <br /> Tuesday, July 25, 1995. Mark Jacobs from JL Analytical arrived at POSDEF to extract <br /> samples from the ten,twenty yard, dumpsters holding the affected soil following standard <br /> sampling protocol. The samples were brought back to JL Analytical's lab for <br />