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rive <br /> a— —) <br /> 8Hi Jarvis D037Sequoia Morgan Hill CA 95037(408)776 9600 <br /> Analytical FAX(408)7826309 <br /> www sequoialabs cam <br /> I <br /> or-Rancho Cordova(ARCO) Project ARCA#2133, Stockton, CA MPCO263 <br /> 7 Ktlgare Rd Suite 100 Project Number Arco#2133, Stockton, CA Reported <br /> cho Cordova CA,95670 Project Manager Brian Carey 03/31/06 14 03 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Morgan Hill <br /> Reporting Spoke Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 6C16016-EPA 5030B P/T/EPA 8260B <br /> Laboratory Control Sample(6CI6016-BSI) Prepared&Analyzed 03/16/06 <br /> Chlorobenzene 21 6 0 50 ugA 20 0 108 80-120 <br /> 1,2-Dichlorobenzene 207 0 50 200 104 80-125 <br /> 1 3-Dichlorobenzene 208 050 200 104 75 120 <br /> 1 4-Dtchtorobenzene 194 050 200 97 75-120 <br /> Surrogate 1 2-Dtchloroethane-d4 5 09 500 102 60-135 <br /> Surrogate 4-Bromofluorobenzene 506 500 101 70-120 <br /> Surrogate Dibromofluoromethane 558 5 00 112 65-130 <br /> Sun ogale Toluene-d8 S43 5 00 109 70-120 <br /> Laboratory Control Sample Dup(6C160I6-BSDI) Prepared&Analyzed 03/16/06 <br /> Chlorobenzene 21 8 0 50 ug/) 200 109 80-120 09 10 <br /> 1 2 Dichlorobenzene 21 6 050 20 0 108 80-125 4 10 <br /> dichlorobenzene 21 9 050 „ 20 0 110 75-120 5 10 <br /> ichlorobenzene 204 050 200 102 75-120 5 15 <br /> Surrogate 12-Dtchloroethane-d4 525 500 105 60-135 <br /> Surrogate 4-Bromo)7uorobenzene 5 13 5 00 103 70-120 <br /> ,Sw rogate Dtbromofluoromethane 5 58 500 112 65-130 <br /> Surrogate Toluene-d8 532 500 106 70-120 <br /> Batch 6C16020-EPA 5030B P/T/EPA 8260B <br /> Blank(6C16020-BLKI) Prepared&Analyzed 03/16/06 <br /> Cert-Amyl methyl ether ND 050 ug/I <br /> Benzene. ND 0 50 " <br /> tent-Butyl alcohol ND 20 " <br /> Di isopropyl ether ND 050 " <br /> 12-Dibromoethane(EDS) ND 0 50 " <br /> 12-Dichloroethane ND 0 50 PF <br /> Ethanol ND 300 IC <br /> Ethyl ten butyl ether ND 0 50 " <br /> Lthylbenzene ND 0 50 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) 0 500 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1 2-Dtchloroethane-d4 192 250 77 60-135 <br /> Surrogate Toluene-d8 250 250 100 70-120 <br /> �gtiola Analytical - Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 17 of 20 <br />