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r � <br /> Sequoia SSS Jarvis Dr <br /> Morgan Hill,CA 95037 <br /> analytical (408)776.9600 <br /> FAX(408)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 94932,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 Liinit Notes <br /> Batch 3B12003-EPA 5030B[PIT] <br /> Laboratory Control Sample(3B12003-BS1) Prepared&Analyzed 02/12/03 <br /> Surrogate a a a-7�ifluomtoluene 860 [4911 100 860 55-142 <br /> Laboratory Control Sample(3B12003-BS2) Prepared&Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-C10) 294 50 ug/l 250 118 62-134 <br /> Surrogate a a a-Triuorotoluene 104 " 100 104 55-142 <br /> Matrix Spike(31312003-MSI) Source MMB0145-04 Prepared&Analyzed 02/12/03 <br /> Gasoline Range Orgamcs(C6-C 10) 540 50 ugll 550 ND 982 62-134 <br /> Benzene 644 050 680 ND 947 68-140 <br /> Toluene 32 1 050 410 ND 783 76-127 <br /> W ylbenzene 805 050 " 980 ND <br /> total 82 1 77-130 Q-19 <br /> enes <br /> (total) 38 4 0 50 479 ND 802 78-128 <br /> Surrogate aa a-Tri luorotoluene 117 100 117 55-142 <br /> Matrix Spike Dup(31312003-MSD1) Source MMB0145-04 Prepared&Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-CIO) 536 50 ug/1 550 ND 975 62-134 0 743 41 <br /> Benzene 658 050 680 ND 968 68-140 215 30 <br /> Toluene 339 050 41 0 ND 827 76-127 545 30 <br /> Ethylbenzene 816 050 9 80 ND 833 77-130 136 21 Q-19 <br /> Xylenes(total) 397 050 479 ND 829 78-128 3 33 21 <br /> Surrogate a a a-Tri luorotoluene 119 100 119 55-142 <br /> Batch 3B12005-EPA 5030B [PIT] <br /> Blank(3$12005-BLKI) Prepared&Analyzed 02/12/03 <br /> Gasoline Range Organics(C6-C10) ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl text-butyl ether ND 25 " <br /> quoia 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 /> 15 of 21 <br />