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Sequoia <br />Analytical <br />Wier -Ryan - Dublin <br />6747 Sierra Court, Suite J <br />Dublin, CA 94568 <br />Attention Barbara Sieminski <br />680 Chesapeake Dnve <br />Redwood City CA 94063 <br />(650) 364-9600 <br />FAX (650) 364-9233 <br />404 N Wiget Lane <br />Walnut Creek CA 94598 <br />(925) 988 9600 <br />FAX (925) 988-9673 <br />819 Striker Avenue Suite 8 <br />Sacramento CA 95834 <br />(916) 921 9600 <br />FAX (916) 921-0100 <br />1455 McDowell Blvd North Ste D <br />Petaluma CA 94954 <br />(707) 792 1865 <br />FAX (707) 792-0342 <br />1551 Industnal Road <br />San Carlos CA 94070-4111 <br />(650) 232 9600 <br />FAX (650) 232-9612 <br />Client Project ID Chevron #9-5775, Lodi <br />Sample Matrix Sod <br />Analysis Method EPA 5030/8015 Mod /8020 <br />First Sample # 902-0092 <br />Sampled Jan 25-27,1999 <br />Received Jan 29, 1999 <br />Reported Feb 10, 1999 <br />TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX / MTBE <br />Reporting <br />Sample <br />Sample <br />Sample <br />Analyte <br />Limit <br />I D <br />I D <br />I D <br />mg/Kg <br />902-0092 <br />902-0093 <br />902-0094 <br />S81-58 <br />SB1-65 <br />S81-72 <br />Purgeable <br />Hydrocarbons <br />1 0 <br />1 5 <br />30 <br />N D <br />Benzene <br />00050 <br />052 <br />044 <br />00078 <br />Toluene <br />00050 <br />0 071 <br />030 <br />N D <br />Ethyl Benzene <br />00050 <br />0 023 <br />0 062 <br />N D <br />Dotal <br />044 <br />N D <br />Xylenes <br />00050 <br />0 12 <br />MTBE <br />0 050 <br />110 <br />33 <br />030 <br />Chromatogram Pattern <br />Gasoline <br />Gasoline <br />-- <br />Quality Control Data <br />Report Limit Multiplication Factor 10 25 1 0 <br />Date Analyzed 2/5/99 2/8/99 2/5/99 <br />Instrument Identification HP -4 HP -4 HP -4 <br />Surrogate Recovery, % 78 79 80 <br />(QC Limits = 40-140%) <br />Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br />Analytes reported as N 0 were not detected above the slated reporting limit <br />(QUO4t�IA ANALYTICAL, #1271 <br />G1c_. A7) <br />I rine Fegley <br />Project Manager <br />m <br />9020044 GET <9> <br />