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` . <br /> (DFAX <br /> c 885 Jarvis Dr <br /> Seuoia Morgan 40 C7 95037 <br /> 9 (408)776 9G00 <br /> ,DWO Analytical www sewwse 08)7a2 6308 <br /> quoialabs cont <br /> Sector-Rancho Cordova(ARCO) Project ARCO 90595, Stockton,CA MNG0109 <br /> 3017 Kilgore Rd Suite 100 Project Number 62546 Reported <br /> Rancho Cordova CA, 95670 Project Manager Rusty Benkosky 07/20/04 20 24 <br /> 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 %REC Limits RPD Limit Notes <br /> Batch 4G16005-EPA 5030B PIT <br /> Laboratory Control Sample Dup(4G16005-BSD1) Prepared&Analyzed 07/16/04 <br /> Toluene 182 050 U84 200 91 78-129 8 20 <br /> Xylenes(total) 640 050 600 107 83-137 11 20 <br /> Surrogate 12 Dichloroethane-d4 479 500 96 78-129 <br /> LaboratoEy Control Sample Du (4G16005-BSD2) Prepared&Analyzed 07/16/04 <br /> Gasoline Range Organics(C4-C12) 450 50 ugA 440 102 70-124 8 20 <br /> Surrogate 12 Dtchloroethane-d4 442 500 88 78-129 <br /> Matnx Spike(4G16005-MSI) Source MNG0166-10 Prepared 07/16/04 Analyzed 07/17/04 <br /> Gasoline Range Organics(C4-Cl2) 4400 500 119/1 4400 ND 100 70-124 <br /> Surrogate 1,1-Dichloroethane-d4 478 500 96 78-119 <br /> Aftwatrix Spike Du (4G16005-MSDI) Source MNG0166-10 Prepared 07/16/04 Analyzed 07/17/04 <br /> IqWG&whnc Range Organics(C4-C12) 4680 500 ug(l 4400 ND 106 70-124 6 20 <br /> Surrogate I 1-Dichloroethane-d4 466 500 93 78-119 <br /> Sequoia Analytical -Morgan Hill The results in Mrs report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otheni ise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 19 of 21 <br />