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404 N WISet lane <br />Sequoia Walnut Geek, -9600 <br />94598 <br />(915)98 98 &9600 <br />FAX (925) 988-9673 <br />vo— <br />Analytical _ -- ' vjw seg <br />Cr,-ttler Ryan hie - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Proicia Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reported <br />24 -Jul -00 11 33 <br />Batch OG11015 - EPA 5030E lPffl <br />Blank (010-11015-BLKI) <br />Reporting <br />Spice Source %REC RPD <br />Analyte <br />Result <br />Lumt Units <br />Level Result %REC Limits RPD Limn Notes <br />Batch OG10007 - EPA 5030B JP/TJ <br />ND <br />050 " <br />LCS (OG10007-BS2) <br />ND <br />050 " <br />Prepared & Analyzed 11 -Jul -00 <br />Methyl tert-butyl ether <br />444 <br />20 uga <br />500 888 70-130 <br />Surrogate Drbromofluoromethane <br />490 <br />050 " <br />500 980 50-150 <br />Surrogate l 2-Drchloroethane-d4 <br />430 <br />500 860 50-150 <br />Mainz Spice (OG10007-MSI) <br />Source W007026-02 <br />Prepared & Analyzed l0 -Jul -0O <br />Methyl tert-butyl ether <br />485 <br />20 ugll <br />500 ND 970 60-150 <br />Surrogate Drbromofluoromethaue <br />450 <br />444 <br />500 900 50-150 <br />Surrogate 1 2-Duchloroetha+e-d4 <br />350 <br />490 <br />Soo 700 50-150 <br />Matnx Spike Dup (OG10007-MSDi) <br />Source W007026-02 <br />Prepared 10 -Jul -00 Analyzed 11 -Jul -00 <br />Methyl tert-butyl ether <br />489 <br />20 Ug/l. <br />500 ND 978 60-150 0 821 25 <br />Srrrogate Dibromofhtoromethane <br />46.0 <br />Soo 920 50-150 <br />Surrogate 1 2-Dichloroeihane-d4 <br />370 <br />500 740 50-150 <br />Batch OG11015 - EPA 5030E lPffl <br />Blank (010-11015-BLKI) <br />Prepared & Analyzed 11 -Jul -00 <br />tert-Butyl. alcohol <br />ND <br />20 mgtr& Aur <br />Methyl tett-butyl ether <br />ND <br />050 " <br />Di-sotropyl ether <br />ND <br />050 " <br />Ethyl text -butyl ether <br />ND <br />050 " <br />teMAmyl methvl ether <br />ND <br />050 " <br />Swmgare Dibronwfluoromahane <br />500 <br />Sao 100 50-150 <br />Surrogate 12 Dkhforvedxuw-d4 <br />4S 0 <br />50.0 900 50-150 <br />LCS (OG11015-BSI) <br />Prepared & Analyzed I I Jul -00 <br />Methyl tat -beryl ether <br />444 <br />0 S0 mghm� Au <br />500 88.8 70-130 <br />Surrogate Drbromofluoromellrmre <br />490 <br />500 98.0 50-150 <br />Smrrrgate 12-Dichlorvethane-d4 <br />430 <br />Sao 860 50.150 <br />Sequoia Analytical - Walnut Creek The results in tins report apply to the samples analysed in accordance with the c <br />custody document Thus analytical report must be reproduced to its en <br />Page 12 of 15 <br />