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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 _ <br /> (916)921-9100 <br /> Analytical <br /> FAX(416)921-0100 <br /> www sequoialabs com <br /> E <br /> International-Rancho Cordova Project Tosco 1205,Lathrop, CA <br /> lgore Road,Suite 100 Project Number- N/A Reported <br /> Cordova CA,95670 Prosect Manager Rusty Betilroslry 04/10/02 1111 <br /> Total Purgeable Hydrocarbons, BTEX and MTBE in Air by DHS LUFT-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Levet Result %REC Limits RPD Lmut Notes <br /> Batch 20303$5-EPA 5030B(Pto <br /> Blank(2030385-BLK1) Prepared&Analyzed 03/28/02 <br /> Purgeable Hydrocarbons ND 10 mg/n?Air <br /> Benzene ND 0 050 " <br /> Toluene ND 0 050 " <br /> Ethylbenzene ND 0 050 " <br /> Xylenes(total) ND 0 050 " <br /> Methyl Left-butyl ether ND 050 " <br /> Surrogate a,a,a-Trifluorotoluene 213 200 106 60-140 <br /> LCS(2030385-BS1) Prepared&Analyzed 03/28/02 <br /> Benzene 1 77 0 050 mg/m'Air 200 885 70-130 <br /> Toluene 200 0 050 200 100 70-130 <br /> Ethylbenzene 218 0 050 2 00 109 70-130 <br /> Xylenes(total) 632 0 050 6 00 105 70-130 <br /> Methyl tent-butyl ether 202 050 200 101 70-130 <br /> Surrogate a,a,a-TYijluorotoluene 230 200 115 60-140 <br /> LCS Dup(203.0.3.85-BSD1) Prepared&Analyzed 03/28/02 <br /> Benzene 170 0 050 mgltW Air 2 00- 85 0 70-130 4 03 25 <br /> Tohme 192 0 050 2 00 960 70-130 408 25 <br /> Ethylbenzene 2 19 0 050 200 110 70-130 0 458 25 <br /> Xylenes(total) 6 65 0 050 600 111 70-130 509 25 <br /> Methyl tert-butyl ether 187 050 200 93 5 70-130 771 25 <br /> Surrogate a a a-Trouorotoluene 152 200 76 0 60-140 <br /> Batch,2040016-EPA 5030B fT <br /> Blank(2040016-BLK1) Prepared&Analyzed 03/29/02 <br /> Purgeable Hydrocarbons ND 10 mg/ml 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-Trifluorotoluene -152--- -" - 200- - 76 0 --60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> custody document This analytical report must be reproduced in its entire <br /> Page Page 9 of 14 <br />