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s Drive <br /> 885 Jervia— ) Sequoia MorganHdl CA 950375037 <br /> a— (408)776 9600 <br /> Analytical FAX(408)782 6308 <br /> r� www sequoialabs cow <br /> Secor-Rancho Cordova(ARCO) Project ARCO#4932,Stockton,CA MOJ0547 <br /> 3017 Kilgore Rd Suite 100 Project Number GOC BD-0001 Reported <br /> Rancho Cordova CA,95670 Project Manager Clinton Harms 10/20/05 12 56 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Repotting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Lunt Notes <br /> Batch 5316001 -EPA 5030E PIT/EPA 8260B <br /> Matrix Spike(5,116001-NISI) Source MOJ0547-16 Prepared 10/16/05 Analyzed 10/17/05 <br /> tent-Amyl methyl ether 173 5 0 ug/l 150 20 114 80-115 <br /> Benzene 577 5 0 516 ND 112 65-115 <br /> tert-Butyl alcohol 1740 200 1430 110 114 75-120 <br /> DI-isopropyl ether 161 50 151 ND 107 75-125 <br /> 1,2-Dibromoethane(EDB) 194 50 149 ND 130 85-120 HL <br /> 1,2-Dichloroethane 196 5 0 147 ND 133 85-130 LM <br /> Ethanol 1850 1000 1420 ND 130 70-135 <br /> Ethyl tort butyl ether 174 5 0 150 ND 116 75-130 <br /> Ethylbenzene 804 5 0 754 ND 107 75-135 <br /> Methyl tert-butyl ether 772 5 0 H 702 830 0 65-125 BB LN <br /> Toluene 434 5 0 372 1 1 116 85-120 <br /> Xylenes(total) 430 5 0 412 ND 104 85-125 <br /> Gasoline Range Organics(C4-C 12) 6070 500 4400 980 116 60-140 <br /> Surrogate 11-Dichloroethane-d4 346 500 109 60-135 <br /> Matrix Spike Dup(5J16001-MSDI) Source MOJ0547-16 Prepared 10/16/05 Analyzed 10/17/05 <br /> cert-Amyl methyl ether 177 50 ugll 150 2 0 117 80-115 2 15 LM <br /> Benzene 56 2 so 516 ND 109 65-115 3 20 <br /> tert-Butyl alcohol 1680 200 1430 110 110 75-120 4 25 <br /> Di-isopropyl ether 167 50 151 ND ill. 75-125 4 15 <br /> i,2-Dibromoethane(EDB) 192 so 149 ND 129 85-120 1 15 HL <br /> 1,2-Dichloroethane 180 50 147 ND 122 85-130 9 20 <br /> Ethanol 1910 1000 1420 ND 135 70-135 3 35 <br /> Ethyl tort-butyl ether 168 50 150 ND 112 75-130 4 25 <br /> Ethylbenzene 76 6 50 754 ND 102 75-135 5 15 <br /> Methyl tert-butyl ether 786 5 0 70 2 830 0 65-125 2 20 BB,LN <br /> Toluene 407 5 0 372 1 1 109 85-120 6 20 <br /> Xylenes(total) 394 50 412 ND 96 85-125 9 20 <br /> Gasoline Range Organics(C4-C 12) 5720 500 4400 980 108 60-140 6 25 <br /> I <br /> Surrogate 11-Dichloroethane-d4 513 500 103 60-135 <br /> I <br /> Sequoia Analytical -Morgan Hill The results in this report apply to the smnples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> 77iis analytical report must be reproduced in its entirety <br /> Page 21 of 24 <br />