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Che M ENVIRONMENTAL LABORATORIES <br /> Mobile & In-Hoose Laboratories Certified by State of California <br /> Phone [408] 955-9988 / FAX [408] 955-9538 <br /> QUALITY CONTROL RESULTS <br /> Analysis : 8015M/TPH & 8020 BTEX <br /> Date of Analysis : 10/19/93 <br /> Laboratory Sample # : SA101993 . 1 <br /> tClient Sample # : ST-1@21 ' <br /> t Sample Spike MS Rec. MSD Rec. Rel . <br /> Conc. Cone . #1 #2 Diff <br /> (ppm) (ppm) (ppm) M (ppm) ( %) M <br />' 8015M/TPH 0 300 . 0 266 . 1 89 305 . 4 102 13 <br /> Benzene 0 3 . 500 2 . 894 83 2 .509 72 11 <br /> Toluene 0 3 . 500 3 . 006 86 2 . 943 84 2 <br /> Ethyl Benzene 0 3 . 500 2 . 802 80 3 . 391 97 17 <br /> Xylenes 0 7 . 000 5 . 790 83 6 . 584 94 11 <br /> 1 <br /> 1 <br /> t <br /> Reviewed and approved by S..rw oc-T. I l <br /> eorr Tsai, ratory Di ector <br /> 780 Montague Expressway, Suite 404, San Jose, CA 95131 <br />