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404 N Wiget Lane <br /> Sequoia Walnut Creek,CA 94598 <br /> 6 (925)988-9600 <br /> 4D Analytical FAX(925)988-9673 <br /> Gettler Ryan,Inc -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco#6981 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 30-Dec-99 09 27 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Andl�te Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 9L27017 Prepared 14-Dec-99 Using EPA 5030B [P/TJ <br /> Blank(9L27017-BLKI) <br /> Purgeable H)drocarbons ND 10 mg/m'Air <br /> Benzene ND 010 " <br /> Toluene ND 010 <br /> Libylbenzene ND 010 <br /> V lenec(total) ND 0 10 <br /> Methyl tert-butyl ether ND 0 50 " <br /> Sur robole a a a-D iuorololuerre 532 600 887 70-130 <br /> LCS(9L27017-BSI) <br /> Benzene 165 0 10 mg/in'Air 200 825 70-130 <br /> l oluene 165 0 10 200 825 70-130 <br /> 40hylbenzene 153 0 10 2 00 765 70 130 <br /> Wenes(total) 5 14 0 10 6 00 857 70-130 <br /> Sur rogale a a a Tr7 luor otoluene 544 600 90 7 70 130 <br /> LCS Dup (9L27017-BSDI) <br /> Benzene 159 0 10 mg/ml Air 200 795 70 130 3 70 20 <br /> Toluene 155 0 10 200 775 70-130 625 20 <br /> £thn]benzene 161 0 10 200 805 70 130 5 10 20 <br /> \,,lenes(total) 4 82 0 10 600 803 70-130 643 20 <br /> Suri ogale a a a D ri luoi ololuene 5 78 600 963 70-130 <br /> 0oia.Analytical-Walnut Creek The results in this report apply to the sranples analyzed in wcor&mce N ith the thorn of <br /> custody document This analytical rep orl must be reproduced In its entirety <br /> A do B Kenlp,La dlory Director Page 3 of 4 <br /> 7 <br />