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Sequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Stnker Avenue,Suite B Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> IWPDS Services, Inc Client Project ID Unocal#6348,3788 Tracy Blvd,Tracy Sampled Mar 4, 1994 <br /> 2401 Stanwell Dr, Ste 400 Sample Matrix Water Received Mar 4, 1994 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Mar 18, 1994 <br /> Attention Avo Avedissian First Sample# 403-0443 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit ID ID ID I.D ID <br /> pg/L 403-0443 403-0444 403-0445 403-0446 Matrix <br /> MW-1 MW-2 MW-3 MW-4 Blank <br /> Purgeable <br /> Hydrocarbons 50 N D N D N D N D <br /> Benzene 05 N D N D N D N D <br /> Toluene 05 N D N D N D N D <br /> Ethyl Benzene 05 N D N D N D N D <br /> Total Xylenes 05 N D N D N D N D <br /> Chromatogram Pattern -- -- -- -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 1 0 10 10 <br /> Date Analyzed 3/17/94 3/17/94 3/17/94 3/17/94 3/17/94 <br /> Instrument Identification ML#2 ML#2 ML#2 ML #2 ML#2 <br /> Surrogate Recovery, % 87 97 100 103 93 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL#1271 <br /> A11nK p <br /> Project Mana r <br /> 4030443 MPD <1> <br />