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Sequoia <br />404 N Wiget lane <br />Walnut Creek C8 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />lk-0 Analytical <br />www seq°°lalabs� <br />Gettler Rvdn, Inc - Dublin Project Chevron <br />6747 Sierra Court Suite J Project Number Chevron # 9-5775 Reported <br />Dublin CA 94568 Project Manager Scott Polston 25 -Jul -00 10 44 <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />�nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch 0G07018 - EPA 5030B [PIT] <br />Blank (OG07018-BLK2) <br />Prepared & Analyzed 07 -Jul -00 <br />Ethanol <br />ND <br />500 <br />ug/1 <br />tent -Butyl alcohol <br />ND <br />100 <br />Methyl tett-butyl ether <br />ND <br />20 <br />" <br />Di -isopropyl ether <br />ND <br />20 <br />" <br />Ethyl tett-butyl ether <br />ND <br />20 <br />tert-Amvl methvl ether <br />ND <br />20 <br />" <br />1 2-Dichloroethane <br />ND <br />20 <br />" <br />Ethylene dibromide <br />ND <br />20 <br />" <br />Surrogate Dibromofluoromethane <br />520 <br />500 104 50-150 <br />Surrogate 12-Drchloroethane-d4 <br />470 <br />500 940 50-150 <br />US (OG07018-BSI) <br />Prepared & Analyzed 06 -Jul -00 <br />Methyl tert-butvt ether <br />46 1 <br />20 <br />ug/l <br />500 922 70-130 <br />Surrogate Dibromofluoromethane <br />500 <br />Soo 100 50-150 <br />Surrogate 1 2-Dichloroethane-d4 <br />450 <br />500 900 50-150 <br />LCS (OG07018-BS2) <br />Prepared & Analyzed 07 -Jul -00 <br />Methvl tert-butyl ether <br />466 <br />20 <br />ug/1 <br />500 932 70-130 <br />Surrogate Dibromofluoromethane <br />520 <br />" <br />Soo 104 50-150 <br />Surrogate 1 2 Dichloroethane-d4 <br />480 <br />500 960 50-150 <br />Matrix Spike (OG07018-MSI) <br />Source W007002-02 <br />Prepared & Analyzed 06 -Jul -00 <br />Methyl tert-butvl ether <br />452 <br />20 <br />ug/1 <br />500 ND 904 60-150 <br />Surrogate Dibromofluoromethane <br />480 <br />500 960 50-150 <br />Surrogate 12-Dichloroeihane-d4 <br />420 <br />500 840 50-150 <br />Matrix Spike Dup (OG07018-MSD1) <br />Source W007002-02 <br />Prepared & Analyzed 06 -Jul -00 <br />Methyl tent -butyl ether <br />505 <br />20 <br />ug/l <br />500 ND 101 60.150 111 25 <br />Surrogate Dibromofluoromethane <br />490 <br />500 980 50-150 <br />Surrogate 1 2-Dichloroethane-d4 <br />420 <br />500 840 50-150 <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analyzed in accordance with the chardw <br />custody document This analytical report must be reproduced in its entirety <br />Page 17 of 25 <br />".W. <br />