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June 24, 1994 mECEIVED <br /> Mr Martin Miller J U L 11 1994 <br /> ENGINEERING SCIENCE ENVIRONMENTAL HEALTH <br /> 290 Elwood Davis Road PERMIT/SERVICES <br /> Liverpool, NY 13088 <br /> Dear Mr Miller <br /> Enclosed please find the corrected analytical report for three liquid samples for BTEX <br /> and TPH-Diesel. <br /> These samples were analyzed by EPA methods, using detections limits which were <br /> derived from instrumentation studies and method requirements. The original detection limits <br /> reported for BTEX and TPH-Diesel for this particular set of samples were based on the standard <br /> detection hmits for SPL. However, at the clients request, the data was re-evaluated and a lower <br /> detection limit was reported. <br /> Under the direction of Ide Williams, Houston Environmental's QA/QC Officer, method <br /> detection limit studies were conducted by the GC Supervisor, at the request of Engineering <br /> Science, specifically for the analysis of TPH-Diesel and TPH-Gasohne Through these studies, <br /> it was determined that MDLs (method detection limits) of 0.03 mg/L for TPH-Diesel and 0.08 <br /> ug/1 for TPH-Gasoline were attainable. As a result of this study, SPL is able to report the limits <br /> which are required for the State of California <br /> If I can be of further assistance or answer any questions, please do not hesitate to contact <br /> meat (713) 660-0901 ext 114 <br /> Karen Satterfield <br /> Project Manageme t Supervisor <br />