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819 Sinker Avenue Suite 8 <br /> Sacramento,CA 95834 <br /> 4DSequoia (916)921-9604 <br /> FAX(916)921-0100 <br /> q► Analytical www sequoaalabs corn <br /> SECOR International-Rancho Cordova Project TOSCO 11193,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/17/01 14 16 <br /> Total Purgeable Hydrocarbons,BTEX and MTBE in Air by DHS LUFT- Quality Control <br /> Sequoia Analytical- Sacramento <br /> Reporting Spice Source %REC RPD <br /> Analyte Result Limn Units Level Result %RHC Lmuts RPD Luiut Notes <br /> Batch 1120087-EPA 5030B(PIT) <br /> Blank(1120087-BLK1) Prepared&Analyzed 12/04/01 <br /> Purgeable Hydrocarbons ND 10 inglaaa'Air <br /> Benzene ND 0 050 " <br /> Toluene ND 0 050 " <br /> Ethylbenzene ND 0 050 " <br /> Xylenes(total) ND 0 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a,a-Triuorotoluene 196 200 980 60-140 <br /> LCS(1120087-BS1) Prepared&Analyzed 12/04/01 <br /> Benzene 1 84 0 050 anghn"Aar 200 920 70-130 <br /> Toluene 191 0 050 200 955 70-130 <br /> Ethylbenzene 194 0 050 200 970 70-130 <br /> Xylenes(total) 530 0 050 600 893 70-130 <br /> Methyl teat-butyl ether 214 050 200 107 70-130 <br /> Surrogate a a a-Trifluorotoluene 195 200 975 60-140 <br /> LCS Dup(1120087-BSD1) Prepared&Analyzed 12/04/01 <br /> Benzene 196 0 050 rnghn"Air 2 00 98 0 70-130 632 25 <br /> Toluene 203 0 050 200 102 70-130 609 25 <br /> Ethylbenzene 207 0 050 2 00 104 70-130 648 25 <br /> Xylenes(total) 572 0 050 600 95 3 70-130 762 25 <br /> Methyl tert-butyl ether 229 0 50 2 00 114 70-130 677 25 <br /> Surrogate a a a-Trifduorotoluene 2 00 200 100 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain ty oJ• <br /> custody document This analytical report must be reproduced in its entire <br /> Page Page 6 of 10 <br />