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Page 1 of 5 <br /> Vicki McCartney [EH] <br /> From: Vicki McCartney[EH] <br /> Sent: Thursday, February 23, 2006 1:54 PM <br /> To: 'Wilken, Brandon' <br /> Subject: RE: Requested Jimco Truck Plaza Report <br /> Brandon, <br /> reviewed all the chromatograms that you sent and although the sample chromatogram matches the diesel <br /> chromatogram, without a recent motor oil standard chromatogram to compare the sample chromatogram to, <br /> have doubts about removing motor oil from the analyte list. I have asked for guidance from the chemist at the <br /> California Regional Water Quality Control Board and am currently waiting for a response. I will keep you informed <br /> once I have heard from the chemist. <br /> Vicki McCartney,Senior REHS. <br /> San Joaquin County;; <br /> Environmental Health Department <br /> 304 E.Weber Avenue. <br /> Stockton,CA 95202-2708_ <br /> Phone: (209)468-3456 <br /> Fax: (209).468-3433.. <br /> E-mail: vmccartney@sjcehd.com <br /> -----Original Message----- <br /> From: Wilken, Brandon [mailto:BWilken@cambria-env.com] <br /> Sent: Tuesday, February 14, 2006 2:09 PM <br /> To: Vicki McCartney [EH] <br /> Subject: RE: Requested Jimco Truck Plaza Report <br /> Hello Vicki, <br /> Attached is the reply from the laboratory for your latest questions involving the TPHd analysis in weI1,MW- <br /> 1 , <br /> We do not have a more recent motor oil standard to.provide to you however,no major <br /> maintenance has been performed on this instrument since April 2005. Our GC-FID instruments <br /> are very stable over long periods of time(we verify the diesel CCV everyday.to.prove this). Even <br /> if there was a retention time shift, the fuel pattern would still remain the same. .As you can see, <br /> diesel has a different pattern than motor oil. .This sample does not appear to contain motor.oil. <br /> Regards, <br /> Angela <br /> Cambria feels that we have sent you adequate data to determine that diesel is present and motor oil is not <br /> present in groundwater at the site. Please review this data and let us know what your recommendation is. <br /> Thanks! <br /> Brandon S. Wilken, P.G. <br /> Cambria Environmental Technology, Inc. <br /> 510-420-3355 <br /> -----Original Message----- <br /> 2/23/2006 <br />