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885 Jarvis Dave <br /> Sequoia MorganH1llCA 95037 <br /> (408)776 9600 <br /> Analytical FAX(408)782 6308 <br /> www sequoialabs com <br /> Stratus Environmental Inc Project ARCO#6100 MNB0610 <br /> 3330 Cameron Park Dr,Suite 550 Project Number NIP Reported <br /> Cameron Park CA,95682 Project Manager Jay Johnson 03/23/04 18 50 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical-Petaluma <br /> Reporting Spike Source %RSC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4030433-EPA 5030 soils <br /> Blank 4030433-BLK1 Prepared&Analyzed 03/16/04 <br /> Tert-amyl methyl ether ND 00050 mg/kg <br /> Benzene ND 00050 " <br /> Tert-butyl alcohol ND 0 10 " <br /> Di-isopropyl ether ND 00050 " <br /> 1 2-Dibromoethane(EDB) ND 00050 " <br /> 1,2-Dtchloroethane ND 00050 " <br /> Ethanol ND 020 " <br /> Ethylbenzene ND 00050 " <br /> Ethyl tert-butyl ether ND 0 0050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Toluene ND 00050 " <br /> vlenes(total) ND 00050 " <br /> ogate DibromajTuoromethane 00470 00450 104 81-126 <br /> Surrogate 12-Dichloroelhane-d4 00453 00430 101 73-131 <br /> Surrogate Toluene-d8 00508 00450 113 82-129 <br /> Laboratory Control Sample(4030433-BSI) Prepared&Analyzed 03/16/04 <br /> Tert-amyl methyl ether 0 0520 0 0050 mg/kg 0 0500 104 74-126 <br /> Benzene 0 0513 00050 0 0500 103 75-123 <br /> Tert-butyl alcohol 0 958 0 10 1 00 96 66-129 <br /> Di isopropyl ether 0 0486 00050 0 0500 97 71-127 <br /> 1,2-Dibromoethane(EDB) 0 0533 00050 0 0500 107 88-118 <br /> 1 2-Dtchloroethane 00495 00050 0 0500 99 79-119 <br /> Ethanol 0 933 020 1 00 93 70-140 <br /> Ethylbenzene 0 0546 00050 00500 109 65-135 <br /> Ethyl tert-butyl ether 0 0505 00050 00500 101 72-123 <br /> Methyl tert-butyl ether 0 0500 00050 0 0500 100 70-125 <br /> Toluene 00529 00050 0 0500 106 76-123 <br /> Surrogate Drbromoluoromethane 0 0473 00450 105 81-126 <br /> Surrogate 12-Dichloroethane-d4 00455 00450 101 73-131 <br /> Surrogate Toluene-d8 00509 00450 113 82-129 <br /> ola Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the thorn <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirely <br /> Page 14 of 16 <br />