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1455 McDowell Blvd North Ste D <br /> Sequoia o Petaluma CA 94954 <br /> D (707)792 1865 <br /> Alla v 8�t.�c l FAX(707)792 0342 <br /> www sequotalabs corn <br /> URS Corp-Sacramento Project Arco Site 5469,Stockton CA P403099 <br /> 2870 Gateway Oak., Drive Suite 300 Project Number WR36605 Reported <br /> Sacramento CA 95833 Project Manager Jay Johnson 04/06/04 17 16 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reponing Spike Source rnRFC RPD <br /> LA.,iyte Result Lint Chits LeNel Result %REC Lints RPD Limit Notes <br /> Batch 4030416-EPA 5030B waters <br /> _atrix�pike(4030416-MSI) Source P403171-06 - Prepared&Ana]Xzed 03/15/04 _ <br /> Tert-arnvl methvl ether 5 8b 1 0 ugA 5 00 ND 118 78-117 QC01 <br /> Benzene 5 59 0 50 " 5 00 ND 112 81-118 <br /> Teri-butyl alcohol 118 20 100 6 2 112 60-147 <br /> Di-isopropyl ether 6 15 10 5 00 ND 123 70-125 <br /> 1 2-Dtbroinoethane(EDB) 5 56 050 5 00 ND 117 85-125 <br /> l 2-Dichloroethane 6 2b 0 50 5 00 ND 126 77-126 <br /> Ethanol 108 100 100 ND 108 55-200 <br /> Ethylbenzene 5 67 0 50 " 5 00 ND 113 89-122 <br /> Ethvl ten-butyl other 6 11 10 5 00 ND 122 71-120 QC01 <br /> Methvl tert-butyl ether 14 5 0 50 5 00 8 3 124 70-122 QC01 <br /> Toluene 5 47 0 50 5 00 0 15 106 84-119 <br /> nes(total) 17 3 0 50 15 0 ND 115 86-132 <br /> r oguie 5 19 5 00 104 X4-12" <br /> Surrogate I?-Drchlmoethune d4 ?? 5 00 104 74-135 <br /> Sw i ogate Toluene-d8 4 58 5 00 92 84-119 <br /> Surrogate 4-BrantoJ7uoroheei:ene 4 91 500 99 86-119 <br /> Matrix Spike Dup(4010416 MSD1) Source_ P40_3171-06 Prepared&Analyzed 03/15/04 _ - <br /> Tert-amyl methyl ether 6 18 1 0 ugA 5 00 ND 124 78-117 5 20 QC01 <br /> Benzene 5 89 0 50 5 00 ND 118 81-118 5 20 <br /> Teri-butyl alcohol 127 20 100 62 121 60447 7 20 <br /> Di-isopropyl ether 6 32 1 0 5 00 ND 126 70-125 3 20 QCOI <br /> 1 2-Dibromoethane(EDB) 609 050 5 00 ND 122 85-125 4 20 <br /> 1 2-Dichloroethane 6 59 0 50 5 00 ND 132 77-126 5 20 QCOI <br /> Ethanol 123 100 100 ND 123 55-200 13 20 <br /> Ethvlbeiizene a 78 050 5 00 ND 116 89-122 2 20 <br /> Ethyl tert-hutvl ether 6 38 1 0 5 00 ND 128 71-120 4 20 QCOI <br /> Methyl tent-butvl ether 153 0 50 5 00 8 3 140 70-122 5 20 QC01 <br /> Toluene 5 65 0 50 5 00 0 15 110 84-119 3 20 <br /> Xylenes(total) 180 0 50 15 0 ND 120 86-132 4 20 <br /> Stu i agate Drhr onrofluoi onicthane 5 41 5 00 108 84-122 <br /> Stirlogate 1 2-Urchloto thwie d4 5 72 5 00 114 74-135 <br /> Sturogale Toluene d8 4 90 5 00 98 84-119 <br /> Surrogate 4-8ronrolhiWohen_ott 5 49 5 00 110 86-119 <br /> toga Analyticai- Petalt.tma T{ie results rrr this repoi l appli to the samples anal)=ed i r accordance itith the chain <br /> oft uslodi documenl Euless oiheiiirse stuted restills ule reported un a Het height <br /> husis This aetulttical repot t artist he reproduced rn its eniueti <br /> Page 24 of 15 <br />