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Sequoia <br />ow <br />Analytical <br />Gettler Rvan Inc - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project 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 />Reporting Spike Source %REC <br />Analvte Result Linut Units Level Result %REC Limits RPD <br />Batch OGI0007 - EPA 5030B [P/TJ <br />404 N Wlget Cane <br />Walnut Geek CA 94598 <br />(925)988-9600 <br />FAX (925) 988-9673 <br />www sequolalalm com <br />Reported <br />24 -Jul -00 11 33 <br />RPD <br />Limit Notes <br />Blank (OG10007-13LK1) <br />Prepared & Analyzed 10 -Jul -0O <br />Ethanol <br />ND <br />500 <br />ugll <br />tent-Butvl alcohol <br />ND <br />100 <br />" <br />Methyl tent-butvl ether <br />ND <br />20 <br />" <br />Di-tsopropvl ether <br />ND <br />20 <br />Ethvl tett butyl ether <br />ND <br />20 <br />" <br />tert-Amyl methvl ether <br />ND <br />20 <br />1,2-Dichloroethane <br />ND <br />20 <br />Ethvlene dibroitude <br />ND <br />20 <br />" <br />Surrogate Dibromojiuorumethane <br />500 <br />500 100 50.150 <br />Surrogate 1 2-Dichforoethane-d4 <br />460 <br />500 910 50-150 <br />nk (OG10007-BLK2) <br />Prepared & Analyzed 11 -Jul -00 <br />of <br />ND <br />500 <br />ugli <br />tert Butyl alcohol <br />ND <br />t00 <br />" <br />Methyl tert-butyl ether <br />ND <br />20 <br />" <br />Di -isopropyl ether <br />ND <br />20 <br />" <br />Ethyl tert-butvl ether <br />ND <br />20 <br />" <br />tert Amyi methyl ether <br />ND <br />20 <br />" <br />1,2-Mcliloroetharie <br />ND <br />20 <br />" <br />Ethylene dibromtde <br />ND <br />20 <br />" <br />Srurngate DibrornofluorrunedU— <br />Soo <br />$do 100 50.150 <br />Srr Mate i 1-Duhloroedum-d4 <br />450 <br />Soo 980 50-150 <br />LCS (OG10007-BSI) <br />Prepared & Analvzed. 10-Ju1-00 <br />Methyl tut -butyl ether <br />516 <br />20 <br />uga 500 103 70-130 <br />Sromate Db--Jluor —Ihc— <br />490 <br />" 500 990 50-150 <br />Surrogate 1 1-Diehlonwhiv i -d4 <br />450 <br />Soo 900 50.1 SO <br />Ana1vtical - <br />The remdu in this report apply to the samples and'(Wea In accoraarrca » rum . Grruur .,J <br />cusrady door n nE This an dytiml report mast be reprodeced to its entirety <br />Page I1 of 15 <br />