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85 <br /> Dnv <br /> Sequoia 8Hit[ C is 5037 <br /> Morgan 1iiEl CA 95037 <br /> a—) (408)776 9600 <br /> Analytical FAX(408)7828 <br /> www sequoialabshs cocom <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNHOO56 <br /> 3017 Kilgore Rd Suite 100 Project Number N/P Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/26/04 18 55 <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 Unus Level Result %REC L1mll5 RPD Limit Notes <br /> Batch 4H16003-EPA 5030E PIT <br /> Laboratory Control Sample(4H16003-BS2) Prepared&Analyzed 08/16/04 <br /> Gasoline Range Organics(C4 C12) 493 50 ug/1 440 112 70-124 <br /> Surrogate 12 Dichloroethane d4 390 500 78 78-129 <br /> Matrix Spike(4H16003-MS2) Source MNHO206-01 Prepared 08/16/04 Analyzed 08/17/04 <br /> Methyl tort-butyl ether 46 1 25 ug/I 496 ND 93 63-137 <br /> Gasoline Range Organics(C4 C 12) 2990 250 2200 1500 68 70-124 LN <br /> Benzene 218 2 5 320 200 56 69-124 LN <br /> Toluene 212 2 5 148 7 6 138 78-129 LM <br /> Ethylbenzene 768 2 5 34 8 29 137 84 132 LM <br /> Xylenes(total) 255 2 5 168 24 138 83-137 LM <br /> Surrogate 12 Dichloroethane d4 460 5 00 9.2 78-129 <br /> Matrix Spike Dup(4H16003-MSD2) Source MNHO206-01 Prepared 08/16/04 Analyzed 08/17/04 <br /> Methyl tert-butyl ether 502 2 5 ugll 496 ND 101 63-137 9 20 <br /> Gasoline Range Organics(C4 C12) 2960 250 2200 1500 66 70-124 1 20 LN <br /> Benzene 220 25 320 200 62 69 124 0 9 20 LN <br /> Toluene 206 25 148 7 6 134 78-129 3 20 LM <br /> Ethylbenzene 741 25 348 29 130 84-132 4 20 <br /> Xylenes(total) 238 2 5 168 24 127 83-137 7 20 <br /> Surrogate 12-Dichloroethane d4 4 92 5 00 98 78-129 <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 entirety <br /> Page 12 of 15 <br />