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q1 885 Jarvis Dr <br /> Sequoia Magan HAI,CA 95037 <br /> a— ) <br /> IW Analytical FAX(4084D8)776 9600 <br /> 782 6308 <br /> www sequoialabs can <br /> Secor-Rancho Cordova Project ARCO#2133,Rancho Cordova,CA MLL0908 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#2133,Racho Cordova,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 01/10/03 12 52 <br /> .asollne (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B- Quality Contra <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lirnit Notes <br /> Batch 3010050-EPA 5030E PIT <br /> Blank(3010050-BLKl) Prepared&Analyzed 12/30/02 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Tri luorotoluene 947 100 95 60-140 <br /> Blank(3010050-BLK2) Prepared&Analyzed 01/01/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> I*Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Triuorotoluene 839 100 84 60-140 <br /> Laboratory Control Sample(3010050-BS1) Prepared&Analyzed 12/31/02 <br /> Benzene 903 0 50 ug/l 100 90 70-130 <br /> Toluene 9 16 0 50 100 92 70-130 <br /> Ethylbenzene 944 050 10 0 94 70-130 <br /> Xylenes(total) 268 050 300 89 70-130 <br /> Methyl tert-butyl ether 837 2 0 100 84 70-130 <br /> Surrogate a a a-TriJluorotoluene 994 100 99 60-140 <br /> Laboratory Control Sample(3010050-BS2) Prepared 01/01/03 Analyzed 01/02/03 <br /> Benzene 9 10 050 119/1 100 91 70-130 <br /> Toluene 907 050 100 91 70-130 <br /> Ethylbenzene 924 050 100 92 70-130 <br /> Xylenes(total) 273 050 300 91 70-130 <br /> Methyl tert-butyl ether 8 18 2 0 too 82 70-130 <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> 5 of 7 <br />