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SEQUOIA ANALYTICAL - - - <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921 0100 <br /> Brown &Caldwell Client Project In Arco 2133-93-5, Stockton Sampled Oct 13, 1993 <br /> P O Box 13449 Sample Matrix Sod Relogged Oct 19, 1993 <br /> Sacramento, CA 95813-3449 Analysts Method EPA 5030/8015/8020 Reported Oct 29, 1993 <br /> Attention Steve Misner First Sample# 310-0686 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample <br /> Analyte Limit I D I D I D I D <br /> mg/kg 310-0686 310-0687 310-0689 310-0690 <br /> V-1 V 1 S-2 S-2 <br /> 105-11 155-16 105-11 155-16 <br /> Purgeable <br /> Hydrocarbons 1 0 2 9 550 11 18 <br /> Benzene 0 005 N D 1 3 0 055 0 41 <br /> Toluene 0 005 N D 099 0 080 025 <br /> Ethyl Benzene 0 005 N D 35 0 058 026 <br /> Total Xylenes 0 005 N D 14 035 1 3 <br /> Chromatogram Pattern Weathered Gasoline Gasoline Gasoline <br /> Gasoline <br /> Quality Control Data <br /> Report Limit Multiplication Factor 1 0 10 10 10 <br /> Date Analyzed 10/27/93 10/27/93 10/27/93 10/27/93 <br /> Instrument Identrfication HP-1 HP-1 HP-1 HP-1 <br /> Surrogate Recovery, % N D N D N D N D <br /> (QC Limits = 70-130°x) <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 /> 77 <br /> Linda C Schneider <br /> Project Manager 3100686 BRS <1> <br />