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j. 819 Stnker Avenue,Suite 8 <br /> Sacramento,CA 95834 <br /> Sequoia (916)921-96M <br /> FAX(916)921-0100 <br /> �► Analytical www sequotalabs com <br /> SECOR International-Rancho Cordova Project ARCO 2133,Stockton,CA <br /> 3017 Kilgore Road,Suite 100 Protect Number 2133,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Prosect Manager Rusty Benkosky 06/24/02 18 09 <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 Limits APD Limit Notes <br /> Batch 2060205-EPA 5030B(PIT) <br /> Matrix Spike 2060205-MSl Source 5206109-07 Prepared&Analyzed 06/17/02 <br /> Benzene 905 0 50 ug/I 100 ND 90 60-140 <br /> Toluene 974 0 50 100 ND 97 60-140 <br /> Ethylbenzene 978 0 50 100 ND 98 60-140 <br /> Xylenes(total) 293 0 50 300 ND 98 60-140 <br /> Methyl tert-butyl ether 11 8 2 5 to 0 ND 104 60-140 <br /> Surrogate a,a a-Try7uorotoluene 101 100 101 60-140 <br /> Matrix Spike Dup(2060205-MSDI) Source 5206109_-07 Prepared&Analyzed 06/17/02 <br /> Benzene 102 0 50 u9A t0 0 ND 102 60-140 12 25 <br /> Toluene 107 0 50 too ND 107 60-140 9 25 <br /> Ethylbenzene 10 6 0 50 too ND 106 60-140 8 25 <br /> Xylenes(total) 32 6 0 50 300 ND 109 60-140 11 25 <br /> AIIWethyl tert-butyl ether 13 6 2 5 100 ND 122 60-140 14 25 <br /> arrogate a a a-Try7uorotoluene 10 6 100 106 60-140 <br /> Batch 2060224-EPA 5030B(PIT) <br /> Blank(2060224-BLK1) Prepared&Analyzed 06/18/02 _ <br /> Purgeable Hydrocarbons ND 50 UPI <br /> Benzene ND 0 50 " <br /> Toluene ND 0 50 " <br /> i <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trrfluorotoluene 9 90 100 99 60-140 <br /> LCS(2060224-BS1) Prepared&Analyzed 06/18/02 _ <br /> Benzene 9 78 0 50 119/1 10 0 98 70-130 <br /> Toluene 103 0 50 10 0 103 70-130 <br /> Ethylbenzene 102 050 10 0 102 70-130 <br /> Xylenes(total) 31 6 050 30 0 105 70-130 <br /> Methyl tert-butyl ether 108 2 5 10 0 108 70-130 <br /> Surrogate ace a-Trifluorotoluene 106 100 106 60-140 <br /> quota 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 8 of 10 <br />