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j SEQUOIA ANALYTICAL - - - <br /> 819 Striper Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 FAX (916) 921 0100 <br /> Brown &Caldwell Client Project ID Arco 2133-93-5, Stockton Sampled Oct 18, 1993 <br /> P O Box 13449 Sample Matrix Soil Received Oct 19, 1993 <br /> Sacramento, CA 95813-3449 Analysis Method EPA 5030/8015/8020 Reported Nov 8, 1993 <br /> Attention Steve Misner First Sample # 310-0713 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample <br /> Analyte Limrt I D I D I D I D I D <br /> mg/kg 310-0713 310-0714 310-0715 310-0716 310-0717 <br /> S-4@10' S-4@15' S-5@15' V-5@10' V-5915' <br /> urges e <br /> Hydrocarbons 10 94 20 1,000 160 ND <br /> Benzene 0 005 0 026 0 013 25 ND 0 012 <br /> Toluene 0 005 0 010 0 011 33 ND ND <br /> Ethyl Benzene 0 005 0 035 N D 11 N D N D <br /> STotal Xylenes 0 005 0 020 0 022 53 1 9 N D <br /> Chromatogram Pattern Gasoline Gasoline Gasoline Weathered <br /> Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 1 0 100 50 1 0 <br /> Date Analyzed 10/28/93 10/28/93 10/28/93 10/27/93 10/27/93 <br /> Instrument Identification HP-1 HP-1 HP-1 HP-1 HP-1 <br /> Surrogate Recovery, % 125 116 128 106 89 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N 0 were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL <br /> Linda C Schneider <br /> Project Manager 3100713 BRS <1> <br />