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885 Jarvis Drive <br /> Sequoia MorganHdl CA95037 <br /> A (408)776 9600 <br /> Analytical FAX( uoial2 b308 <br /> www sequoiaahs coin <br /> Stratus Environmental Inc Prolect ARCO#6100 MNB0610 <br /> 3330 Cameron Park Dr,Suite 550 Project Number N/P 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 %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4030433-EPA 5030 soils <br /> Laboratory Control Sample Du 4030433-BSD1 Prepared&Analyzed 03/16/04 <br /> Tert-amyl methyl ether 00508 00050 mg/kg 0 0500 102 74-126 2 35 <br /> Benzene 0 0509 00050 0 0500 102 75-123 0 8 35 <br /> Tert-butyl alcohol 0 938 0 10 1 00 94 66-129 2 35 <br /> Di-isopropyl ether 00505 00050 00500 101 71-127 4 35 <br /> 1,2-Dihromoethane(EDB) 00517 00050 00500 103 88-118 3 35 <br /> 1 2-Dichloroethane 00491 00050 0 0500 98 79-119 0 8 35 <br /> Ethanol 0 971 020 1 00 97 70-140 4 35 <br /> Ethylbenzene 00533 00050 00500 107 65-135 2 35 <br /> Ethyl tert-butyl ether 0 0491 00050 0 0500 98 72-123 3 35 <br /> Methyl tert-butyl ether 0 0502 00050 0 0500 100 70-125 0 4 35 <br /> Toluene 0 0523 0 0050 0 0500 105 76-123 1 35 <br /> ogate Dtbromofluoromethane 00487 00450 108 81-126 <br /> ogate 12-Dichloroethane-d4 00459 00450 102 73-131 <br /> Surrogate Toluene-d8 00518 00450 115 82-129 <br /> oia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated, results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 15 of 16 <br />