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885 Jarvis D1 <br /> Morgan f C 95437 <br /> Sequoia (400 8)777 G 9500 <br /> 308 <br /> Analytical www <br /> scgL8)labs82 com <br /> www sequmalabs coni <br /> Secor-Rancho Cordova(ARCO) Project ARCO 40595, Stockton,CA MNG0109 <br /> 3017 Kilgore Rd Suite 100 Project Plumber 62546 Reported <br /> Rancho Cordova CA,95670 Protect Manager Rusty Benkosky 07/201042024 <br /> Purgeable Hydrocarbons and Volatile Organic Compounds by EPA method 8260B -Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spike Source "/"REC RPD <br /> Analyte Result limit Units Level Result °/aREC Limits RPD Limit Notes <br /> Batch 4G15001 -EPA 5030B P/T <br /> Laboratory Control Sample Dup(4G15001-BSD2) Prepared&Analyzed 07/15/04 <br /> Methyl tert-butyl ether 809 050 ugA 992 82 63-137 3 20 <br /> Ga4ollne Range Organics(C4-C 12) 395 50 440 90 70-124 5 20 <br /> Benzene 5 12 050 640 80 69-124 5 20 <br /> Toluene 330 050 297 111 78-129 6 20 <br /> Ethylbenzene 778 050 696 112 84-132 6 20 <br /> Xylenes(total) 389 050 337 115 83-137 4 20 <br /> Surrogate 12-Dichloroethane-d4 494 500 99 78-119 <br /> Matnx Spike(4G15001-MSI) Source MNG0109-13RE1 Prepared&Analyzed 07/15/04 <br /> Methyl tent-butyl ether 158 1 0 ugll 19 8 ND 80 63-137 <br /> Gsoline Range Organics(C4-C12) 690 100 880 ND 78 70-124 <br /> W�e 10 4 10 128 ND 81 69-124 <br /> T.-luenc 664 10 594 ND 112 78-129 <br /> Ethylbenzene 151 10 " 13 9 ND 109 84-132 <br /> Xylcnes(total) 749 10 674 ND 111 83-137 <br /> Surrogate 1,1-Dtchloroethane-d4 517 500 103 78-119 <br /> Matrix Spike Dup(4G15001-MSD1) Source MNG0109-13REi Prepared&Analyzed 07/15/04 <br /> Methyl tert-butyl ether 152 10 ugll 198 ND 77 63-137 4 20 <br /> Gasoline Range Organics(C4-C12) 739 100 880 ND 84 70-124 7 20 <br /> Benzene 116 10 128 ND 91 69-124 11 20 <br /> Toluene 680 10 S94 ND 114 78-129 2 20 <br /> Ethylbenzene 158 10 13 9 ND 114 84-132 5 20 <br /> Xylencs(total) 770 10 674 ND 114 83-137 3 20 <br /> Surrogate 1,1-Dichloroerhane-d4 4 79 5 00 96 78-119 <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 entirely <br /> Page 12 of 21 <br />