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i <br /> 4DSequoia 680 Chesapeake Drive Redwood City CA 94063 (415) 364 9600 FAX(415) 364 9233 <br /> [900 Bates Avenue Suite L Concord CA 94520 510 686 9600 FAX 51 686 9689 <br /> Analytical ( 6) <br /> 819 Striker Avenuc Suite a Sacramento C?. 95834 (916} 921 9600 FAX(916) 921 0 10 <br /> Brown & Caldwell Client Project ID Arco 434-94-5, Lodi Sampled Jul 6 1994 <br /> 9616 Micron Avenue, Suite 600 Sample Matrix Air Received Jul 6 1994 <br /> Sacramento, CA 95827 Analysis Method EPA 5030/8015/8020 Reported Jul 19, 1994 <br /> Attention Mindy Wright First Sample # 407-0247 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D I D 10 1 D I D I D <br /> ppmv 407-0247 407-0248 407-0249 407-0250 407-0251 407-0252 <br /> Cat OX Cat OX V-1 V2 V 3 V-4 <br /> Influent Effluent <br /> Purgeable <br /> Hydrocarbons 14 210 N D N D 3 1 57 140 <br /> Benzene 0016 ND ND ND ND ND ND <br /> Toluene 0 013 0 29 N D N D 0 024 0 093 015 <br /> Ethyl Benzene 0 012 028 N D N D N D 020 037 <br /> Total Xylenes 0 012 18 0 012 0 051 039 64 14 <br /> Chromatogram Pattern Gasoline - - Gasoline Gasoline Gasoline <br /> C6-C12 C6-c12 C6-C12 C6-C112 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 10 10 1 0 1 0 10 <br /> Date Analyzed 7/7/94 7/7/94 7/7/94 7/7/94 7/7/94 7/7/94 <br /> Instrument Identrficatlon GCHP-03 GCHP-02 GCHP-20 GCHP-20 GCHP-20 GCHP-02 <br /> Surrogate Recovery, % 99 99 102 104 143 96 <br /> (QC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N D were not detected at or above the reporting limit <br /> SEQUOIA ANALYTICAL, ELAP #1210 <br /> C'A a '% C <br /> Craig Ce <br /> Project Manager <br /> 4070247 SRS <11> <br />