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Sequoia 885 Jarvis Drive <br /> Morgan Hill,CA 95037 <br /> 1W Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www secuoialabs coir <br /> #ameron <br /> atus Environmental Inc Project ARCO#2186,Stockton,CA <br /> 30 Cameron Park Dr,Suite Project Number ARCO#12186,Stockton,CA Reported <br /> Park CA,95682 Project Manager Jay Johnson 10/02/02 17 52 <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 2I25038-EPA 5030B P/T <br /> LCS Du 2I25038-BSD1Prepared 09/25/02 Analyzed 09/26/02 <br /> Methyl tert-butyl ether 102 050 ug/I 100 102 63-137 400 13 <br /> Benzene 924 050 100 924 78-124 341 12 <br /> Toluene 968 050 100 968 78-129 2 94 10 <br /> Surrogate 1,2-Dichloroethane-d4 507 Soo 101 78-129 <br /> LCS Du (2125038-BSD2) Prepared 09/25/02 Analyzed 09/26/02 <br /> Methyl tent-butyl ether 8 37 050 ug/1 840 99 6 63-137 3 52 13 <br /> Benzene 500 050 5 28 94 7 78-124 534 12 <br /> Toluene 30 7 050 31 8 965 78-129 1 97 10 <br /> Gasoline Range Organics(C6-C10) 387 50 440 88 0 70-113 0 259 9 <br /> Surrogate 1 2-Dichloroethane-d4 496 500 992 78-129 <br /> Batch 2126018-EPA 5030B P/T <br /> AMmk(2126018-BLKi) Prepared&Analyzed 09/26/02 <br /> nut ND 40 119/1 <br /> tert-Butyl alcohol ND 5 0 <br /> Methyl tert-butyl ether ND 050 " <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> tert-Amyl methyl ether ND 0 50 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethylene dibromide ND 050 " <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Total Xylenes ND 050 " <br /> Gasoline Range Organics(C6-C10) ND 50 " <br /> Surrogate 12-Dichloroethane-d4 507 500 101 78-129 <br /> ota Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> 8of10 <br />