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SEQUOIA ANALYTICAL <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 Matrnc Soil 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 # 304-1029 <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS with BTEX DISTINCTION <br /> Reporting Sample Sample Sample Sample Sample Sample <br /> Analyte Limit I.D I D. I D I D I D I.D. <br /> mg/kg 304-1029 <br /> Purgeable <br /> Hydrocarbons 10 11 <br /> Benzene 00050 N D <br /> Toluene 00050 N D <br /> Ethyl Benzene 00050 N D <br /> Total Xylenes 00050 N D <br /> Chromatogram Pattern Non-Gas Mix <br /> > C9 <br /> Quality Control Data <br /> Report Limit Multiplication Factor 10 <br /> Date Analyzed 4/23/93 <br /> Instrument Identification MI_-2 <br /> Surrogate Recovery, % 84 <br /> (QC Limits = 70-130%) <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 /> Or,EQUOIA ANALYTICAL <br /> 'o�L�l ! <br /> Nokowhat D Herrera <br /> Project Manager 3041024 CHV <2> <br />