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404 N Wlget Lane <br /> Sequoia Walnut Geek,CA 94598 <br /> (925)98-S-9600 <br /> FAX(925)988-9673, <br /> Analytical v�sequo co� <br /> �„� <br /> Ciettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Siena Court Suite J Project Number Unocal#0123 Reported <br /> Dublin CA,94568 Project Manager Deazma L Harding 20-Jul-00 11 19 <br /> Volatile Organic Compounds by EPA Method 8010E- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Liuuts RPD Limit Notes <br /> Batch 0G03007-EPA 5030B [PIT] <br /> Blank(OG03007-BLK2) "--. Prepared&Analyzed 30-Jun-00 <br /> Chloromethane ND 20 ug/I <br /> Vinyl chloride ND 10 " <br /> Bromomethane ND 10 " <br /> Chloroethane ND 10 " <br /> 'hhchlorofluaromethane ND 050 " <br /> Freon 113 ND 10 ^ <br /> 1.1-Drchloroethene ND 10 " <br /> Methylene ehlonde ND 10 " <br /> trans-1,2-Dichloroethene ND 10 " <br /> l,1-Dichloroetha w ND 10 ^ <br /> cis-1,2-Dichloroethene ND to " <br /> Chloroform ND 10 " <br /> 1.1,1-Trichloroethene ND 10 . <br /> Carbon tetradilonde ND 10 " <br /> 1,2-Dwhlorodthane ND 20 " <br /> Tnchloroetimu ND 10 " <br /> _t,2-Dichlosropropane ND 10 " <br /> Bromodicbloromethane ND-1 a <br /> - - <br /> ecus- , chloropropene— --N - 1 0 ^ ---_ <br /> trans-0-Didiloropropene ND 050 " <br /> 1.1.2-Trichloroothane- — - - - - T _ -- ND 1 0 50mm - <br /> Tetracbloroathene ND 10 " <br /> Dibromochloroniathana ND 050 " <br /> 1,2-Dibromoethane ND 10 " <br /> Chlombenzene ND 10 " <br /> Bromoform ND 050 " <br /> 1.2,3-Trichloropropane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 050 " <br /> 1,3-DwWorobenzene ND 050 " <br /> 1,4-Dichlorobenzone ND 10 <br /> 1.2-Dichlorobenzene ND 20 " <br /> Surrogate DibromodYNor+oinediune 950 " .100 950 50-150 <br /> Surrogate 4-BromgJluw,obenzene 890 " I Q 0 890 50-150 <br /> Sequoia Analytical-Walnut Creek The results in thus report qP*to the samples analyzed in accordance with the chain of <br /> custody document. This au dyacal,report must be ncproduced in its entirely 0 <br /> Page 16 of 20 <br />