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j SEQUOIA ANALYTICAL <br /> 1900 Bates Avenue Suite LM Concord, California 94520 <br /> 00 (510) 686-9600 • FAX (510) 686-9689 <br /> es Client Project ID' Arco 2093-93h(,'Tracy Sampled " Aug'1b, 1993 <br /> 1855 Gateway Blvd , Ste 770 Sample Matrix Sod Received Aug 11, 1993 <br /> Concord, CA 94520 Analysis Method EPA 5030/8015/8020 Reported Aug 13, 1993 <br /> Attention Paul Supple First Sample# 308-0351 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> ' Reporting Sample Sample <br /> Analyte Limit I D l D <br /> mg/kg 308-0351 308-0352 <br /> CA2 (A-D) CA3 (A-D) <br /> Purgeable <br /> Hydrocarbons 10 20 85 <br /> Benzene 0 005 N D 0 069 <br /> Toluene 0 005 N D 0 i 4 <br /> ' Ethyl Benzene 0 005 N D 013 <br /> *Total Xylenes 0 005 0 083 26 <br /> ,Chromatogram Pattern Non Gasoline Gasoline <br /> Mixture <br /> (>C10) <br /> 'Quality Control Data <br /> Report Lima Multiplication Factor 10 5 0 <br /> Date Analyzed 8/2/93 8/2/93 <br /> Instrument Identification HP-2 HP-4 <br /> Surrogate Recovery, % 102 94 <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 /> EQUOIA ANALYTICAL <br /> 'Kenneth K F Lee <br /> Laboratory Director <br /> ' 3080351 ROU <1> <br />