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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue • Suite LM • Concord, California 94520 <br /> (510) 686-9600 • FAX (510) 686-9689 <br /> dWapreahari Engineering, fnc Client Project ID Unocal, 7303 Pacific Ave , Stockton Sampled Jun 21, 1993 <br /> 401 Stanwell Dr, Ste 400 Sample Matrix Water Received Jun 21, 1993 <br /> Concord, CA 94520 Analysis Method EPA 3510/3520/8015 Reported Jul 1, 1993 <br /> Attention Mardo Kaprealian, P E First Sample# 306-0894 <br /> TOTAL EXTRACTABLE PETROLEUM HYDROCARBONS <br /> Reporting Sample Sample <br /> Analyte Limit I D I D <br /> ,ug/L 306-0894 Matrix <br /> MW- 1* Blank <br /> Extractable <br /> Hydrocarbons 50 220 <br /> Chromatogram Pattern Discrete Peaks <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 <br /> Date Extracted 6/24/93 <br /> Date Analyzed 6/25/93 <br /> Instrument Identification HP-3B <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 /> EQUOIA ANALYTICAtIf Please Note <br /> \ ! *Discrete Peaks do not appear to match any known hydrocarbon <br /> `1 ' - fuel pattern It maybe possible to identify the individual peaks by EPA 8270 Open Scan <br /> Alan flr mp <br /> —Pri:sje—ct Manager <br /> 3060894 KEI <2> <br />