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SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue a Suite LM • Concord, California 94520 <br /> (510) 686-9600 a FAX (510) 686-9689 <br /> realfan Engineering, Tnc Client Project 1D Former Unocal#5098 5606 Pacific Ave Sampled Jun 28, 1993 <br /> 1 Stanwell Dr, Ste 400 Sample Matrix Water Received Jun 28, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Jul 14, 1993 <br /> Attention Avo Avedessian First Sample# 306-1150 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limit 1 D I D I I D I D <br /> erg/L 306-1150 306-1151 306-1152 306-1153 Matrix <br /> MW-10 MW-11 MW-12 MW-13 Blank <br /> Purgeable <br /> Hydrocarbons 50 220 83,000 22,000 N D <br /> Benzene 0 5 17 18,000 1,300 N D <br /> Toluene 05 N D 24,000 920 N D <br /> Ethyl Benzene 05 26 2,100 500 N D <br /> Dotal Xylenes 05 062 13,000 1,800 N D <br /> Chromatogram Pattern Gasoline Gasoline Gasoline - <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 200 400 1 0 1 0 <br /> Date Analyzed 7/1/93 7/11/93 7/1/93 7/11/93 7/1/93 <br /> Instrument Identification HP-4 HP-4 HP-4 HP-4 HP-4 <br /> Surrogate Recovery, % 89 96 95 97 97 <br /> (QC 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 <br /> Ilk <br /> emp <br /> ctManager <br /> 3061150 KEI <1> <br />