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Sequoia C <br /> 404 N A [ane <br /> Walnut Creek CA 94598 <br /> 4 (925)988-96M <br /> FAX(925)988-9673 <br /> Analyticalwww sequoialabs corn <br /> Gettler Rydn,lilt. -Dubhn Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron #9-2033 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 12-Mar-01 07 45 <br /> __J <br /> Volatile Organic Compounds by EPA Method 8010B - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reportmg Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> B i It h 1 B22003-EPA 5030B [PIT] <br /> Blank(1B22003-BLK3) Prepared&Analyzed 26-Feb-01 <br /> Chloromethane ND 20 ug/1 <br /> Vinyl chloride ND 10 " <br /> Bromometharie ND 12 <br /> Chloroethane ND 10 <br /> Tnchlorofluoromethane ND 060 " <br /> Freon 113 ND 10 " <br /> I,I-Dichloroethene ND 10 " <br /> Methylene chloride ND 10 <br /> trans-12-Dichloroethene ND 10 " <br /> i <br /> ],1-Dichloroethane ND 10 " <br /> cis-1,2-Dichloroethene ND 10 <br /> Chloroform ND 10 " <br /> 1,1,1-Tnchloroethane ND 10 <br /> Carbon tetrachloride ND 10 " <br /> 1,2-Dichloroethane ND 16 " <br /> Tnchloroetlrene ND 20 " <br /> 1,2-DrcMoropropane ~—� - -- ND 10 <br /> Bromodichloromethane ND 10 <br /> cis-1,3-Dichloropropene ND 10 " <br /> trans-l,3-Dichloropropene ND 060 <br /> 1,1 2-Trichloroethane ND 050 " <br /> Tetrachloroethene ND 060 " <br /> Dibromochloromethane ND 050 " <br /> 1,2-Dtbromoethane ND 10 " <br /> Chlorobenzene ND 10 " <br /> Bromoforrn ND 050 " <br /> 1,2,3-Tnchloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 060 " <br /> 1,3-Dichlorobenzene— _ ND--- 050 <br /> 1,4-Dichlorobenzene ND 12 <br /> 1,2-Dichlorobenzene ND 12 <br /> Surrogate ,Dibromodiuoromethane 802 100 802 50-150 <br /> Surrogate 4-Bromofluarobenzene 865 100 865 50-150 <br /> Sequoia Analytical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety a <br /> Page 13 of 25 <br />