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819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> Amok�&' www sequoialabs com <br /> 7Rancho <br /> COR International-Rancho Cordova Protect ARCO 595,Stockton,CA <br /> 7 Kilgore Road,Suite 100 Project Number 595,Stockton,CA Reported <br /> Cordova CA,95670 Project Manager Rusty Benkosky 02/21/02 16 26 <br /> Total Purgeable Hydrocarbon,BTEX and MTBE by DHS LUFI'-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> IZU-- <br /> Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2020114-EPA 5030B <br /> Blank 2020114-BLKl Prepared&Analyzed 02/08/02 <br /> Purgeable Hydrocarbons ND 50 ug/I <br /> Benzene ND 050 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a,a,a-Trifluorotoluene 962 100 962 60-140 <br /> LCS(2020114-BS1) _ Prepared&Analyzed 02/08/02 _ <br /> Benzene 803 0 50 ug/l 100 803 70-130 <br /> Toluene 965 050 too 965 70-130 <br /> Ethylbenzene I03 050 ]00 103 70-130 <br /> Xylenes(total) 320 0 50 300 107 70-130 <br /> thy'tert-butyl ether 849 25 " 100 849 70-130 <br /> Surrogate a,a,a-Tri luorotoluene 105 100 105 60-140 <br /> Matrix Spike(2020114-MS1) Source S202065-08 Prepared&Analyzed 02/08/02 <br /> Benzene 792 050 ug/I 100 ND 792 60-140 <br /> Toluene 951 0 50 100 ND 95 1 60-140 <br /> Ethylbenzene 101 0 50 100 ND 101 60-140 <br /> Xylenes(total) 31 8 050 " 30 0 ND 106 60-140 <br /> Methyl tert-butyl ether 824 25 " 100 ND 824 60-I40 <br /> Surrogate aa a-Tryluorotoluene 101 100 101 60-140 <br /> MatrIx Spike DuP 2020114-M5D1) Source S202065-08 Prepared&Analyzed 02/08/02 <br /> _ <br /> Benzene 847 050 U911 too ND 847 60-140 671 25 <br /> Toluene 101 050 100 ND 101 60-140 602 25 <br /> Ethylbenzene 108 050 " too ND 108 60-140 670 25 <br /> Xylenes(total) 33 6 050 300 ND 112 60-140 550 25 <br /> Methyl tert-butyl ether 8 86 2 5 100 ND 88 6 60-140 725 25 <br /> Surrogate a a a-Trifluorotoluene 103 100 103 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed In accordance with the chain <br /> ojcustody document This analytical report must be reproduced in its entirety <br /> Page Page 8 of I 1 <br />