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SEQUOIA ANALYTICAL a 5 '93] MM , <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 • FAX (415) 364-9233 <br /> Chevron U S A Inc Client Project ID P o #9250390,5608 N Pershing,Stockton Sampled Apr 23, 1993 <br /> P O Box 5004 Sample Matra Sod Received Apr 23, 1993 <br /> San Ramon, CA 94583-0804 Analysis Method EPA 5030/8015/8020 Reported Apr 30, 1993 <br /> Attention Brett Hunter First Sample # 304-1024 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I D. ID LD ID ID 1.13 <br /> mg/kg BLK042393 304-1024 304-1025 304-1026 304-1027 304-1028 <br /> SP-6 SP-7 SP-8 WX-1B WB-1A <br /> Purgeable <br /> Hydrocarbons 1 0 N D N D N D N D N D N D <br /> Benzene 00050 N D N D N D N D N D N D <br /> Toluene 00050 N D N D N D N D N D N D <br /> Ethyl Benzene o0050 N D N D N D N D N D N D <br /> Total Xylenes 00050 N D N D N D N D N D N D <br /> Chromatogram Pattern -- -- -- - -- <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 1 0 1 0 1 0 1 0 1 0 <br /> Date Analyzed 4/23/93 4/23/93 4/23/93 4/23/93 4/23/93 4/23/93 <br /> Instrument Identification ML-2 ML-2 ML-2 ML-2 ML-2 ML-2 <br /> Surrogate Recovery, % - 93 93 88 91 50 <br /> (OC Limits = 70-130%) <br /> Purgeable Hydrocarbons are quantitated against a fresh gasoline standard <br /> Analytes reported as N C were not detected above the stated reporting limit <br /> SEQUOIA ANALYTICAL <br /> Nokowhat D Herrera <br /> Project Manager 3041024 CHV <1> <br />