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Lawrence Livermore N ional Laboratory <br /> L3 <br /> October 1, 1993 <br /> Mr. Bill Snavely <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> Post Office Box 2009 <br /> Stockton, Ca. 95201 <br /> SUBJECT: September 1993 Monthly Tank Integrity Testing Results <br /> Dear Mr. Snavely: <br /> Enclosed is a list of the monthly tank integrity testing results for two Lawrence <br /> Livermore National Laboratory (LLNL) Site 300 underground petroleum tanks <br /> having capacities of 2,000 gallons or more. Tanks 827-D1U1 and 865-DlU1 were <br /> integrity tested and found to be leak tight. 871-D1U1 has been removed from <br /> services for the summer and is being monitored by manual tank gauging <br /> performed weekly. <br /> Monthly tank integrity testing is performed to satisfy the requirements of Title <br /> 23,California Code of Regulations, Division 3,Chapter 16,Underground Tank <br /> Regulations, Section 2643 (c), (1). <br /> All integrity tests for the month of August 1993 were completed using Horner EZY <br /> -CHEK test equipment operated by state licensed tank tester, Mr. Gary Williams <br /> (License No. 90-1296) of Clayton Environmental Consultants, Inc., Pleasanton, <br /> California. The Clayton Test Reports are enclosed. <br /> If you require additional information or have questions regarding the integrity <br /> testing procedure or results, please call Richard Henry of the Tank Assessments <br /> and Guidance Group (510) 423-3641. <br /> Sincerely, <br /> C. Susi Jackson,Di-Vision Leader <br /> Operations and Regulatory Affairs <br /> Environmental Protection Department <br /> CSJ/DC:kp <br /> Enclosures <br /> ceded <br /> An Equal Opportunity Employer•University of California•P.O.Box 808 Livermore,CA 94551-9900•Telephone(510)422-1100 •Twx 910.386,8339 UCLLL L VMR <br />