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chem ENVIRONMENTAL LABORATORIES <br /> Mobile & 1n-House Laboratories Certified by State of California <br /> Phone (4081955-9988 / 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 : 03/17/95 <br /> Laboratory Sample # : SD031795 1 <br /> Pro3ect Name : GEWEKE <br /> Sample Spike MS Rec MSD Rec . Rel <br /> Conc Conc #1 #2 Dj_ff <br /> (ppm) (ppm) (ppm) ( % ) (ppm) ( % ) ( % ) <br /> 8015M/TPH 0 750 769 103 730 97 6 <br /> Benzene 0 20 19 5 97 18 . 0 90 7 <br /> Toluene 0 20 19 1 95 17 . 0 85 11 <br /> Ethyl Benzene 0 20 21 0 105 19 3 96 9 <br /> Xylenes 0 40 38 . 5 96 35 . 9 90 6 <br />• Reviewed and approved by 6 5/' — <br /> Ge rge sai, Laboratory Director <br /> 780 Montague Expressway, Suite 404, San Jose, CA 95131 <br />