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u Sequoia 680 Chesapeake Drive Redwood City CA 940's (415) 364 9600 FAX(415) 364 9233 <br /> 1 404 N Wiget Lane Walnut Creek CA 94598 (510) 988 9600 FAX(510)988 9673 <br /> IWOAnalytical 819 Striker Avenue Suite 8 Sacramento,CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> SkIPIDS Services Client Project ID Unocal#5886,2701 W March Ln, Stockton Sampled Sep 2, 1997 <br /> 2401 Stanwell Dr, Ste 300 Sample Matrix Water Received Sep 2, 1997 <br /> Concord, CA 94520 Analysis Method EPA 3510/3520/8015 Reported Sep 17, 1997 <br /> Attention Jarrel Crider First Sample# 709-0242 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit LD ID ID ID ID ID <br /> pg/L 709-0242 709-0243 709-0244 709-0245 709-0246 709-0247 <br /> MWA MW-2 MW-3 MW-4D" MW-4S MW-51) <br /> Extractable <br /> Hydrocarbons 50 N D N D N D 410 N D N D <br /> Chromatogram Pattern -- - Diesel& <br /> Discrete Peaks <br /> • <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 10 10 10 10 <br /> Date Extracted 9/9/97 9/9/97 9/9/97 9/9/97 9/9/97 9/9/97 <br /> Date Analyzed 9/10/97 9/10/97 9/10/97 9/10/97 9/10/97 9/10/97 <br /> Instrument Identification HP-3A HP-3A HP-3A HP-3A HP-3A HP-313 <br /> Extractable Hydrocarbons are quantitated against a fresh diesel standard <br /> Analytes reported as N D were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL, #1271 Please Note <br /> -This sample appears to contain diesel and non-diesel mixtures "Discrete Peaks"refers to <br /> nature on File unidentified peaks In the EPA 8270 range <br /> Alan 13 Kemp <br /> Project Manager <br /> 7090242 MPD ¢5> <br />