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M ENVIRONMENTAL LABORATORIES <br /> s <br /> AM <br /> Mobile & In-House Laboratories Certified by State of California <br /> Phone: (408) 955-9988 / FAX: (408) 955-9538 <br /> QUALITY CONTROL RESULTS <br /> Client: Geological Audit Services, Inc. <br /> 1803 West March Lane, Ste. A <br /> Stockton, CA 95207 <br /> Attn: Bob Marty <br /> Analysis : 8015M/TPH, 8020 BTEX <br /> Date of Analysis : 11/21/94 <br /> Laboratory Sample # : SD112194 . 1 <br /> Project Name: GEWEKE <br /> Sample Spike MS Rec . MSD Rec . Rel . <br /> Conc . Conc. #1 #2 Diff <br /> (ppm) (ppm) (ppm) (% ) (ppm) ( % ) (% ) <br /> 8015M/TPH 0 800 852 107 883 110 3 <br /> Benzene 0 3 . 48 3. 27 94 3 . 36 97 3 <br /> Toluene 0 3 .48 3 . 29 95 3 . 51 101 6 <br /> Ethyl Benzene 0 3 . 48 3 . 51 101 3 . 65 105 4 <br /> Xylenes 0 6 . 96 6 . 86 99 7 . 21 104 5 <br /> Reviewed and approved by <br /> rgesai, La' MTnory Director <br /> 780 Montague Expressway, Suite 404, San Jose, CA 95131 <br />