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Sequoia 885Jarvis <br /> 5037 <br /> Morgan Hid,CA 95Q37 <br /> 079� Yti <br /> Anal cal (448)7769600 <br /> FAX(406)782-6308 <br /> www sequotalabs can <br /> Secor-Rancho Cordova Project ARCO#4932,Stockton,CA MMB0227 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#4932,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 02/25/03 11 03 <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 3B21005-LPA 5030B[PIT] <br /> Blank(3B21005-ULK1) Prepared&Analyzed 02/21/03 <br /> Gasolme Range Organics(C6-C 10) ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 Q-23 <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a aa-Trruorotoluene 100 100 100 55-142 <br /> Laboratory Control Sample(3B21005-BSI) Prepared&Analyzed 02/21/03 <br /> Benzene 109 0 50 ugA 100 109 68 140 <br /> Toluene 11 1 0 50 100 111 76-127 <br /> ylbeozene <br /> 116 050 " 100 116 77-130 <br /> yienes(total) 347 050 300 <br /> 116 78-128 Q-23 <br /> Surrogate a a a-Triuorotoluene 102 " 100 102 55-142 <br /> Laboratory Control Sample(3B21005-BS2) Prepared&Analyzed 02/21/03 <br /> Gasoline Range Organics(C6-C10) 287 50 ug/I 250 115 62-134 <br /> Surrogate aaa-Trifluorotoluene Ill 100 ill 55-142 <br /> Laboratory Control Sample Dup(3B21005-BSD1) Prepared&Analyzed 02/21/03 <br /> Benzene 10 7 0 50 ug/l 100 107 68-140 185 30 0-09 <br /> Toluene 109 050 100 109 76-127 182 30 0-09 <br /> Ethylbenzene 113 050 100 113 77-130 262 21 0-09 <br /> Xylenes(total) 34 1 050 300 114 78-128 1 74 21 0-09 <br /> Surrogate aa a-Trifluorotoluene 110 100 110 55-142 0-09 <br /> Laboratory Control Sample Dup(3B21005-BSD2) Prepared&Analyzed 02/2_1/03 <br /> Gasoline Range Organics(C6-C10) 237 50 u <br /> gn 250 948 62-I34 191 41 <br /> Surrogate a a a-Trtlluorotoluene 109 100 109 55-142 0-09 <br /> quota 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 to its entirety <br /> 17 of 21 <br />