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Sequoia Morgan Hill C8Hill CA 9550303is 7 <br /> 7 <br /> (408)776 9600 <br /> � Analytical www <br /> seq 8) labs92 cob <br /> www sequoialabs com <br /> i <br /> F <br /> or- Rancho Cordova(ARCO) Project ARCO#2133,Stockton,CA MPCO263 <br /> 7 Kilgore Rd Suite 100 Project Number Arco#2133, Stockton,CA Reported <br /> Pro ect Mane er Brian Care 03/31/06 14 03 <br /> cho Cordova CA,95670 J g Y <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 6CO9034-EPA 5030B PIT 1 EPA 8260E <br /> Laboratory Control Sample(6C09034-BS2) Prepared 03/09/06 Analyzed 03/10/06 <br /> Cert-Amyl methyl ether 160 050 ugA 163 98 80-115 <br /> Benzene 511 050 504 101 65-115 <br /> tert-Butyl alcohol 154 20 169 91 75-150 <br /> Di isopropyl ether 15 5 050 162 96 75-125 <br /> 1,2 Dibromoethane(EDB) 157 050 166 95 85-120 <br /> 1 2-D i chloro ethane 14 4 050 15 5 93 85-130 <br /> Ethanol 161 300 165 98 70-135 <br /> Ethyl tert-butyl ether 161 050 16 4 98 75-130 <br /> Ethylbenzene 713 050 728 98 75-135 <br /> Methyl tert-butyl ether 730 050 7 84 93 65-125 <br /> Toluene 340 050 380 89 85-120 <br /> nes(total) 425 050 408 104 85-125 <br /> line Range Organics(C4-C12) 449 50 440 102 60-140 <br /> Surrogate 12-Dichloroethane-d4 243 250 97 60-135 <br /> Surrogate Toluene-d8 2 60 250 104 70-120 <br /> Sur i ogare Dibromofluoromethane 2 58 250 103 65-130 <br /> S w rogate 4-Bromofluorobenzene 250 250 100 70-120 <br /> Laboratory Control Sample Dup(6C09034-BSD!) Prepared 03/09/06 Analyzed 03/10/06 <br /> Chlorobenzene 104 050 ug/l 100 104 80-120 2 10 <br /> 1,2-Dichlorobenzene 989 050 10 0 99 80-125 2 10 <br /> 1 3-Dichlorobenzene 101 050 100 101 75-120 3 10 <br /> 1 4-Dichlorobenzene 970 050 10 0 97 75-120 2 15 <br /> Surrogate 12-Dichloroethane-d4 250 250 100 60-135 <br /> Sun ogate 4-Bromofluoroben_ene 241 250 96 70-120 <br /> Surrogate Drbromofluoromethane 2 63 250 105 65-130 <br /> Sun ogale Toluene-d8 257 250 103 70-120 <br /> 0quoia 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 13 of 20 <br />