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r <br /> 819 Striker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-9600 <br /> Analytical FAX 921-0100 <br /> www sequoiequotatabs oom <br /> SECOR International-Rancho Cordova Project ARCO 2093,Tracy,CA <br /> 3017 Kilgore Road,Suite 100 Project Number 2093,Tracy,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 04/01/02 18 44 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFt'-Quality Control <br /> Sequoia Analytical-Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limo Units Level Result °/"REC Lunits RPD Linut Notes <br /> Batch 2030305-EPA 5030B <br /> Blank 2030305-BLK1Prepared&Analyzed 03/22/02 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Surrogate a a a-Triuorotoluene 990 100 990 60-140 <br /> LCS(2030305-BSI) Prepared&Analyzed 03/22/02 <br /> Benzene 8 68 0 50 ug/l 10 0 86 8 70-130 <br /> Toluene 9 16 0 50 " 10 0 91 6 70-130 <br /> Ethylbenzene 9 47 0 50 " 10 0 947 70-130 <br /> Xylenes(total) 29 0 0 50 300 967 70-130 <br /> Surrogate a,a,a-Trihuorotoluene 104 100 104 60-140 <br /> Matrix Spike(2030305-MSI) Source 5203267-05 EMared&Analyzed 03/22/02 <br /> Benzene 38 5 0 50 ug/l 100 32 65 0 60-140 <br /> Toluene 9 18 0 50 100 0 67 851 60-140 <br /> Ethylbenzene 45 8 0 50 100 39 680 60-140 <br /> Xylenes(total) 31 6 0 50 300 3 1 950 60-140 <br /> Surrogate a a,a-Trifluorotoluene 114 100 114 60-140 <br /> Matrix Spike Dun(2030305-MSD1) Source 5203267-05 Prepared&Analyzed 03/22/02 <br /> Benzene 38 8 0 50 u9/1 100 32 680 60-140 0 776 25 <br /> Toluene 9 66 050 " 100 0 67 899 60-140 5 10 25 <br /> Ethylbenzene 46 5 0 50 100 39 75 0 60-140 152 25 <br /> Xylenes(total) 34 1 0 50 300 3 1 103 60-140 761 25 <br /> Surrogate a a,a-TYrlluorotoluene 110 " 100 110 60-140 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 7 of 11 <br />