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Vicki McCartney <br /> From: Vicki McCartney <br /> Sent: Tuesday, February 11, 2003 4:32 PM <br /> To: 'tcunningham@lancasterlabs.com' <br /> Cc: Margaret Lagorio <br /> Subject: Questions Concerning Diesel, Motor Oil, and Gasoline Analyses <br /> Teresa, <br /> As I mentioned during our telephone conversation today, I have a number of concerns about how Lancaster Laboratories, <br /> Inc. (Lancaster) is reporting results for diesel and motor oil. My questions and concerns are summarized in this e-mail. <br /> When I spoke to Bob Brown, chemist at Lancaster, on December 20, 2002, it was my understanding that Lancaster is <br /> analyzing diesel and motor oil by EPA SW-846 method 80158. However, instead of analyzing a five-point curve for diesel, <br /> and a five-point curve for motor oil, and quantitating the sample results based on the curves and fuel fingerprints, <br /> Lancaster is analyzing a curve containing a mixture of standards that includes carbon 8 through carbon 40. Areas are <br /> identified and response factors are generated by dividing the areas by the concentrations. The response factors are used <br /> to generate the sample results. <br /> Please let me know if I am correct in my assumptions and if these are correct, then has the State of California approved <br /> this modification to method 8015B? Also, is gasoline being reported by this same procedure? <br /> The telephone number for the State of California Environmental Laboratory Accreditation is 510.540.2800. You may want { <br /> to check with someone there. <br /> Also, I have had to deny the quarterly groundwater results in GeoTracker because there are no results for motor oil; <br /> instead, there are results for Total Petroleum Hydrocarbons and Total Petroleum Hydrocarbons (C16-C36). <br /> i <br /> look forward to hearing from you by this Friday, February 14th, and do not hesitate to contact me if you have any j <br /> questions. <br /> I <br /> Vicki McCartney SJCEHD <br /> 304 E. Weber Avenue <br /> Stockton, CA 95202-2708 <br /> Phone (209) 468-3456 <br /> Fax (209) 468-3433 <br /> vmccartney@sjcehd.com <br /> i <br /> 1 <br />