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404 N Wlget Lane <br /> Sequoia Walnut Creek.(925 9 94598 <br /> (925)988-9G00 <br /> FAX(925)%8-%73 <br /> Analytical www sequoWabs corn <br /> Gettler Ryan,Inc -Dublin Project Chevron <br /> 6747 Sierra Court Suite J Project Number Chevron#9-9840 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 10-Jul-00 17 52 <br /> Industrial Solvents by EPA Method 8015 (modified) - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 0G03004-EPA 3810 Headspace r <br /> Blank(0003004-BLK1) Prepared&Analyzed 03-Jul-00 <br /> Methanol ND 100 mg/l <br /> Surrogate 1 pentanol 479 500 958 55-157 <br /> Surrogate 1 pentanol(db wax) 421 500 842 57-170 <br /> LCS(OG03004-BS1) Prepared&Analyzed 03-Jul-00 <br /> Methanol 697 too mg/1 800 971 70-130 <br /> Surrogate 1-pentanol 463 500 926 55-157 <br /> Surrogate 1 pentanol(Awme) 410 500 810 57-170 <br /> Matrix Spike(OG03004-MS1) Source MJF'0809-03 Prepared&Analyzed 03-Jul-00 <br /> Methanol 748 100 mg/1 800 ND 935 50-150 <br /> Surrogate 1 pentanol _ 555 r goo 111 55-157 <br /> Surrogate 1 pentanol(dbwar) 511 500 102 57-170 <br /> Matrix Spike Dup(OG03004-MSDI) T Source MJF9809-03 Prepared&Analyzed 03-Jul-00LL •� <br /> Methanol 845 100 mg/l 800 ND 106 50-150 122 50 <br /> Surrogate i pentmiol 636 500 127 55-157 <br /> Surrogate 1 pentanol(db-ax) �5 71 __500 __ _ _11457_-170 Y __ <br /> Batch 0GO5008-EPA 3810 Heads ace <br /> Blank(OG05008-BLK2) Prepared&Analyzed 05-Jul-00 <br />--Methanol —, ---- ---ND -- --100 -ngn <br /> Surrogate 1 pentanol 359 500 718 55-157 <br /> Surrogate 1-pentanol(db-ax) 323 500 646 57-170 <br /> LCS(OG05008-BS1) Prepared 03-Jul-00 Analyzed 04-Jul-00 <br /> Methanol 665 100 mg/1 800 831 70-130 <br /> Surrogate 1 pentarml 484 500 968 55-157 <br /> Surrogate 1 pentanol(dbwax) 454 Soo 908 57-170 <br /> Sequoia Analytical-Walnut Creek The results to this report oppply to the samples analyzed to accordance with the chain \ <br /> custody document.Tins analythcal report must be reproduced in its entire` <br /> Page 9 of 11 <br />