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Sequoia <br />Analytical <br />I <br />404 N W Set Lane <br />Walnut Geek CA 94598 <br />(925)988-9600 <br />FAX (925) 988-9673 <br />www seWuolaiabs corn <br />Gettler Ryan, Inc - Dubim Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron 49-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 24 -Jul -00 It 33 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />inalyte Result Lltnit Uiuts Level Result %REC Limits RPD Linut Notes <br />Batch OG10001 - EPA 5030B [PIT] <br />Blank (OG1000i-BLKI) <br />Prepared & Analyzed i0 -Jul -00 <br />Purgeable Hydrocarbons <br />ND <br />50 <br />ug/l <br />Benzene <br />ND <br />050 <br />" <br />Toluene <br />ND <br />050 <br />Ethylbenzene <br />ND <br />050 <br />" <br />Xylenes (total) <br />ND <br />050 <br />Surrogate a a a-Trtfluorotoluene <br />297 <br />300 <br />990 70-130 <br />LCS (OG10001-BS1) <br />Prepared & Analyzed 10 -Jul -00 <br />Benzene <br />167 <br />0 50 <br />ug/t <br />200 <br />835 70-130 <br />Toluene <br />182 <br />050 <br />20 0 <br />910 70-130 <br />Ethylbenzene <br />21 5 <br />0 50 <br />200 <br />108 70-130 <br />,joLylenes (total) <br />60 0 <br />050 <br />60 0 <br />100 70-130 <br />rrogate a aa•Tri luorotoluene <br />25 7 <br />300 <br />85 7 70-130 <br />LCS (OG10001-BS2) <br />Prepared & Analyzed <br />13 -Jul -00 <br />Benzene <br />16 0 <br />0 50 <br />ug/l <br />200 <br />80 0 70-130 <br />Toluene <br />17 5 <br />0 50 <br />200 <br />87 5 70-130 <br />Ethylbenzene <br />160 <br />050 <br />200 <br />800 70-130 <br />Xylenes (total) <br />58 7 <br />0 50 <br />600 <br />978 70 130 <br />Surrogate aaa-Trifluorotoluene <br />270 <br />30 0 <br />900 70-130 <br />Matrix Spike (OG10001-MSI) <br />Source W006676-19 <br />Prepared & Analyzed <br />10 -Jul -00 <br />Benzene <br />172 <br />050 <br />ug/1 <br />20 0 ND <br />860 70-130 <br />Toluene <br />195 <br />050 <br />200 ND <br />975 70-130 <br />Ethylbenzene <br />222 <br />0 50 <br />200 ND <br />111 70-130 <br />Xylenes (total) <br />63 1 <br />0 50 <br />600 ND <br />105 70-130 <br />Surrogate a a a -Tri luorololuene <br />25 3 <br />300 <br />843 70-130 <br />Woia 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 as its entirely <br />Page 8of15 <br />61 <br />