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885 Jarvis <br /> 4D (40Sequoia ., <br /> Morgan Hill.CA 9543737 <br /> qw Analytical FAX <br /> 9)776 9604 <br /> (408)782 6308 <br /> www sequoialabs cmMlft <br /> Secor-Rancho Cordova Protect ARCO#595,Stockton,CA MMA0549 <br /> 3017 Kilgore Rd Suite 100 Project Number ARCO#595,Stockton,CA Reported <br /> Rancho Cordova CA,95670 Protect Manager Rusty Benkosky 02/25/03 10 42 <br /> Total-Purgeable Hydrocarhonc (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 Linut Notes <br /> Batch 3809003-EPA 5030B JPITJ _ <br /> Blank(3B09003-BLKI) Prepared&Analyzed 01/31/03 <br /> Gasoline Range Organics(C6-C10) ND 20 ug/l <br /> Benzene ND 020 " <br /> Toluene ND 020 " <br /> Ethylberizene ND 020 " <br /> Xylenes(total) ND 020 " <br /> Methyl tent-butyl ether ND 10 <br /> Surrogate a a a-Trifluorotoluene 193 200 965 56-134 <br /> Laboratory Control Sample(3B09003-BS1) Prepared&Analyzed 01/31/03 <br /> Benzene 1 58 020 ug/l 200 79 0 62-125 <br /> Toluene 160 020 200 _ 80 0 68-121 <br /> Ethylbenzene 180 020 200 900 75-125 • <br /> Xylenes(total) 521 020 600 868 76-121 <br /> Surrogate a a a-Trifluorotoluene 197 200 98 5 56-134 <br /> Laboratory Control Sample(31309003-BS2) T Prepared&Analyzed 01/31/03 <br /> Gasoline Range Organics(C6-C 10) 548 --20 ug/1 50 0 110 65-142 <br /> Surrogate aa a-Trifluorotoluene 208 200 104 56-134 <br /> Matrix Spike(31309003-MSI) Source Prepared 01/31/03 Analyzed 02/01/03 <br /> Gasoline Range Organics(C6-C 10) 91 3 20 ug/l 110 ND 83 0 65-142 <br /> Benzene 175 0 20 136 ND 129 62-125 QM-07 <br /> Toluene 647 020 820 ND 78 6 68-121 <br /> Ethylberizene 171 020 196 ND 87 2 75-125 <br /> Xylenes(total) 8 12 020 9 58 ND 84 8 76-121 - <br /> _ Surrogate a a a-Trrfluorotoluene - 195 - — --2 00----- --------- 975-- 56-134---- - - - - — — <br /> Matrix Spike Dup(3B09003-MSDI) Source Prepared 01/31/03 Analyzed 02/01/03 <br /> Gasoline Range Organics(C6-C10) 90 1 20 ug/I 110 ND 819 65-142 1 32 50 <br /> Benzene 1 75 020 " 1 36 ND 129 62-125 000 31 QM-07 <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 bass <br /> This analytical report must be reproduced in its entirety <br /> 18 of 22 <br />