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... <br /> HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON, TEXAS 77059 <br /> PHONE(713)660-0901 <br /> CASE NARRATIVE <br /> WORK ORDER NO(S).: 9603232 <br /> Southern Petroleum Laboratories is pleased to present the results of this project <br /> to BP Oil Company and their consultant Alisto Engineering, Inc.. The samples were <br /> received intact at our Houston facility with a temperature of 3 degrees Celsius. Eight <br /> water samples were analyzed for tests as specified on the Chain of Custody. The <br /> following is a brief narrative of the laboratory analysis: <br /> ► The Laboratory Control Sample (LCS)recovery for Diesel Range Hydrocarbons <br /> by Method CA Modified 8015 was outside QC limits. Due to hold time <br /> requirements and limited sample volumes, this sample was not reanalyzed. <br /> The LCS is a method specific QA test sample. This sample is analyzed to verify <br /> instrument and method performance. Acceptable LCS recoveries are an indication of <br /> adequate analytical techniques and instrumentation. Problems concerning MS and <br /> MSD recoveries in analytical batches with an acceptable LCS are an indication of <br /> potential matrix interferences. <br /> — Z�A"'W'1.4eol 4 <br /> Edward Fry <br /> SPL Project Manager <br />