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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95634 <br /> (916)921-9600 <br /> Analytical FAX(916)921 D 100 <br /> www sequoialablabs comom <br /> SECOR International-Rancho Cordova Project TOSCO 8671,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Project Number N/A Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/14/02 15 16 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Lirruts RPD Limit Notes <br /> Batch 1120296-EPA 5030B PIT <br /> Blank(1120296-BLKI) Prepared&Analyzed 12/21/01 <br /> Purgeable Hydrocarbons ND 050 mg/kg <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Methyl tent-butyl ether ND 00050 " <br /> Surrogate a a a-TrIfluorotoluene 00218 00200 109 60-140 <br /> LCS(1120296-BSI) Prepared&Analyzed 12/21/01 <br /> Benzene 00193 00050 mg/kg 00200 965 70-130 <br /> Toluene 00205 00050 00200 102 70-130 <br /> Ethylbenzene 00198 00050 00200 990 70-130 <br /> Xylenes(total) 00589 00050 00600 992 70-130 <br /> ethyl tent-butyl ether 00190 00050 00200 950 70-130 <br /> Surrogate a a a-Triuorotoluene 00200 00200 100 60-140 <br /> Matrix Spike(1120296-MSI) Source 5112194-18 Prepared I2/21/01 Analyzed 12/22/01 <br /> Benzene 00184 00050 mg/kg 00200 ND 920 60-140 <br /> Toluene 00174 00050 00200 ND 870 60-140 <br /> Ethylbenzene 00186 00050 00200 ND 93 0 60-140 <br /> Xylenes(total) 00531 00050 00600 ND 885 60-140 <br /> Methyl tert-butyl ether 00175 00050 00200 ND 87 5 60-140 <br /> Surrogate a a a-Trifluorotoluene 00188 00200 94 0 60-140 <br /> Matrix Spike Dup(1120296-MSDI) Source S112194-18 Prepared I2121/01 Analyzed 12/22/01 <br /> Benzene 00175 00050 mg/kg 00200 ND 87 5 60-140 501 25 <br /> Toluene 00165 00050 00200 ND 825 60-140 5 31 25 <br /> Ethylbenzene 00174 0 0050 00200 ND 970 60-140 667 25 <br /> Xylenes(total) 00499 00050 00600 ND 83 2 60-140 621 25 <br /> Methyl tert butyl ether 00158 0 0050 00200 ND 790 60-140 10 2 25 <br /> Surrogate a a a-Trti luorotoluene 00183 00200 915 60-140 <br /> .Sequoia Analytical-Sacramento The results to this report apply to the samples analyzed to accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page Page 18 of 27 <br />