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California Laboratory Services <br /> University of California 04/05/94 <br /> Lawrence Livermore Natl. Lab <br /> 7000 East Ave./P.O. Box 808 <br /> Livermore, Ca 94551 <br /> Attention: M. Heaton, L-633 <br /> Reference: Analytical Results <br /> Project Name: CLS ID No. : M4258 <br /> Project No. : B00018 CLS Job No. : 794258 <br /> Date Received: 03/11/94 <br /> Chain Of Custody: 115 <br /> The following analyses were performed on the above referenced project: <br /> No. of Turnaround <br /> Samples Time Analysis Description <br /> 1 10 Days Sulfide, EPA Method 9030 <br /> 1 10 Days Flash Point <br /> 1 10 Days CAM Metals, STLC, EPA Methods 6010/7000 <br /> 1 10 Days CAM Metals, TTLC, EPA Methods 6010/7000 <br /> 1 10 Days Halogenated Volatiles by EPA Method 8010 <br /> 2 1 Day Purgeable Aromatics by EPA Method 8020 <br /> 2 1 Day TPH Diesel by DHS Method - M8015 (soil) <br /> 1 10 Days Total Cyanide, EPA Method 9010 <br /> 1 10 Days pH, EPA Method 9040 <br /> The presence of Methylene Chloride at relatively low concentrations has been <br /> noted in samples which were part of several LLNL/CLS projects. These values <br /> have been checked and determined to be actual constituents of the soil <br /> samples. Assuming that these soils have uniquie origins, these findings <br /> suggest a common point of contamination. <br /> CLS has extensively reviewed these results and investigated the possibility of <br /> laboratory contamination. Our sample handling protocols have been examined <br /> and personnel interviewed and re-instructed regarding this protocol. To date <br /> no evidence has been found which would support this possibility. <br /> The other most likely contamination points would be at sampling time, <br /> transport to storage or during storage, prior to CLS pick-up. All areas into <br /> which samples are introduced should be examined for the presence of Methylene <br /> Chloride containing materials such as cleaners, paint strippers and <br /> degreasers. <br /> Elevated method 8020 reporting limits for sample "TK01-01-836-D1U1-SP-SO" are <br /> due to the presence of interfering hydrocarbons in this sample. <br /> Although sample "TKO1-01-836-D1U1-SP-SO" was found to contain compounds in the <br /> retention time range generally associated with diesel fuel as well as heavier <br /> hydrocarbons. The reported concentration is based solely on diesel #2 <br /> calibration. <br /> RECYCLEDWER 3249 Fitzgerald Road Rancho Cordova,CA 95742 (916)638-7301 Fax(916)638-4510 <br />