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w <br /> LLiLawrence rmore National Laboratory <br /> _ er 15, 1993 <br /> C�q1 .s r, G' ! C <br /> �uQ <br /> Mr. Bill Snavely <br /> Environmental Health Division <br /> San Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95201 <br /> Subject: Submittal of Closure Report for Underground Storage <br /> Tank 830-D1U1. <br /> Dear Mr. Snavely: <br /> Enclosed you will find a closure report for the underground storage tank (UST) <br /> 830-D1 U1 at the Lawrence Livermore National Laboratory, Site 300, south of <br /> Tracy, California. <br /> The analytical results of the soil sample collected beneath UST 830-D1 U1 were <br /> evaluated by LLNL EPD Tank Representative, Mr. Rick Henry, and compared to <br /> the Practical Quantitation Reporting Limits in the Regional Water Quality Control <br /> Board's Tri-Regional Board Staff Recommendations for Preliminary Evaluation <br /> and Investigation of Underground Tank Sites (TRBSR), dated August 10, 1990. <br /> Based upon the analytical laboratory results of the soil sample collected from <br /> the tank excavation, it was determined that soil beneath the 830-D1 U1 tank <br /> system showed levels of TPH as Diesel and BTEX, that exceed the Practical <br /> Quantitation Reporting Limits in the TRBSR. However, it was determined by Bill <br /> Snavely in a telephone conversation with Rick Henry on October 20, 1993, that <br /> the soil beneath the former UST 830-D1 U1 could be left in place, and the <br /> excavation could be backfilled. The LLNL requests that the San Joaquin Public <br /> Health Services-Environmental Health Division (PHS-EHD) grant a conditional <br /> case closure for the 830-D1 U1 tank system. A State Water Resources Control <br /> Board UST Permit Application Form B shall be submitted to the PHS-EHD <br /> within 30 days of the submittal of this closure report. <br /> If you have any questions, please call Rick Henry, Tank Assessments and <br /> Guidance Group Analyst, at (510) 423-3641. <br /> Sincerely, <br /> /f l� <br /> C. Jackson, Di ' ' n Leader <br /> Operations and Regulatory Affairs <br /> Environmental Protection Department <br /> CSJ:ng/emm <br /> Enclosure <br /> An Equal Opportunity Employer•Universityof California•P.O.Box 808 Livermore,California 94550•Telephone(415)422-1100•Twx 910-386-8339 UCLLL LVMR <br />