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a— ) <br /> 885l,CA 5037Drive <br /> Sequoia Morgan 408)776.4600 <br /> W Analytical FAX(408)782-6308 <br /> WWW sequoialabs com� <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MNG0371 <br /> 3017 Kilgore Rd Suite 100 Project Number 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/03/04 16 21 <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 4G22001 -EPA 5030B P/T <br /> Blank(4G22001-BLKI) Prepared&Analyzed 07/22/04 <br /> tert-Amyl methyl ether ND 050 ug/I <br /> Benzene ND 050 " <br /> tent-Butyl alcohol ND 20 " <br /> Di isopropyl ether ND 0 50 " <br /> 1,2 Dibromoethane(EDB) ND 0 50 " <br /> 1,2 Dichloroethane ND 0 50 " <br /> Ethanol ND 100 IC <br /> Ethyl tert-butyl ether ND o 50 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 050 • <br /> Gasoltne Range Organics(C4-C 12) ND 50 " <br /> Surrogate 12 Dichlaroethane d4 228 250 91 78 119 <br /> Laboratory_Control Sample(4G22001-BSI) Prepared&Analyzed 07/22/04 <br /> tert-Arnyl methyl ether 103 0 50 ugll 10 0 103 56 140 <br /> Benzene 9 84 0 50 too 98 78 124 <br /> ten-Butyl alcohol 756 20 Soo 151 0206 <br /> Di-isopropyl ether 102 050 100 102 76 130 <br /> 1,2-Dibromoethane(EDB) 101 050 10 0 101 77-132 <br /> 1,2-Dichloroethane 102 0 50 10 0 102 77 136 <br /> Ethanol 382 100 200 191 31 186 IC,HL <br /> Ethyl tert-butyl ether 100 050 10 0 100 61 141 <br /> Ethylbenzene 102 050 10 0 102 84-117 <br /> Methyl tert-butyl ether 888 050 10 0 89 63 137 <br /> Toluene 986 050 10 0 99 78-129 <br /> Xylenes(total) 313 050 300 104 83 125 <br /> Surrogate 12-Dlchloroethane-d4 219 250 88 78-129 <br /> Sequoia Analytical-Morgan Hill The results on this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwisestated results are reported on a wet weight basis • <br /> This analytical report must be reproduced in its entirety <br /> Page 17 of 24 <br />