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�S <br /> 885 Jarvis Dr <br /> a— ) Sequoia Mogan Hill,CA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs cam <br /> ecor-Rancho Cordova Project ARCO#4932,Stockton,CA MLK0860 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#4932, Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 12/23/02 10 48 <br /> Total Purgeable Hydrocarbons (C6-C10) by EPA 8015B modified, BTEXM by EPA 8021B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2LO5002-EPA 5030B (PIT] <br /> Laboratory Control Sample(2L05002-BSI) Prepared&Analyzed 12/05/02 �^ <br /> Surrogate a a a Trifluorotoluene 886 ug/1 100 886 55-142 <br /> Laboratory Control Sample(2L05002-BS2) Prepared&Analyzed 12/05/02 <br /> Gasoline Range Organics(C6 C10) 240 50 119/1 250 960 62-134 <br /> Surrogate a a a-Tr fluorotoluene 813 100 813 55-142 <br /> Laboratory Control Sample Dup(2L05002-BSDI) Prepared&Analyzed 12/05/02 <br /> Benzene 912 050 ug/l 100 91 2 68-140 9 1 1 30 <br /> Toluene 926 050 100 926 76-127 868 30 <br /> Ethylbenzene 919 050 100 91 9 77-130 170 21 <br /> Xylenes(total) 278 050 300 927 78-128 109 21 <br /> Surrogate a a a-Tnfluorotoluene 124 100 124 55-142 <br /> Laboratory Control Sample Dup(2L05002-BSD2) Prepared&Analyzed 12/05/02 <br /> Gasoluie Range Organics(C6-C 10) 241 50 ugll 250 964 62-134 0 416 41 <br /> Surrogate a a,a-Trifluorotoluene 109 100 109 55-142 <br /> Batch 2LO9003-EPA 5030B [P/Tl <br /> Blank(2L09003-BLK1) Prepared&Analyzed 12/09/02 <br /> Gasoline Range Organics(C6-C 10) ND 50 ug/l _.,.. <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a a a-Trifluorotoluene 109 100 109 55-141 <br /> Sequoia Analytical-Morgan Hill The results to 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 to its entirety <br /> Page 19 of 23 <br />