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1455 McDowell Blvd North Ste D <br /> SequoiaPet iluma CA 94954 <br /> (707)792 1865 <br /> 1.--D— A al v d ick FAX(707)792 0342 <br /> ° www sequoialahs euro <br /> s <br /> URS Corp-Sacramento Project Arco Site 5469 Stockton CA P403099 <br /> 2870 Gateway Oaks 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 /> Reporttng Spike Source °/,REC RPD <br /> Analyte Result Limit [anus I evel Result 06RF( Limits RPD Limit Notes <br /> Butch 4030416-EPA 5030E waters <br /> Blank(4030416-BLK1) Prepared&Analyzed 03/15/04 <br /> Tert-amyl methvl ether ND 10 ug/l <br /> Benzene ND 0 50 " <br /> Tort-butyl alcohol ND 20 " <br /> Dt-tsopropyl ether ND 10 " <br /> 12-Dibromoethane(EDB) SID 0 50 " <br /> 12-Dtchloroethane ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 0 50 " <br /> Allbliples(total) ND 0 50 " <br /> t ogevc, Diht nvnof7unt omethane 5 07 " 5 00 101 84-122 <br /> Surrogate 12-Dichlotoeihane-d4 519 500 104 71-135 <br /> Sttarogare Tolaene-dS 4 40 100 88 84-119 <br /> Stitrogate 4-Rtomofluoiohenzeiie 4 60 5 00 92 86-119 <br /> Laboratorl Control Sample(4030416-BS1) Prepared R Analyzed 03/15/04 – <br /> Tert-atnvl inethv] ether 5 58 1 0 ugll 5 00 112 78-117 <br /> Benzene 5 4N 050 5 00 110 81-118 <br /> Tert-butyl alcohol 109 20 l00 109 60-147 <br /> Dt-isopropyl ether 604 l 0 5 00 121 70-125 <br /> 1 2-Dibronaoethane(FDB) 5 48 0 50 5 00 110 S5-125 <br /> 1 2-Dichlotoethane 5 95 0 50 " 5 00 119 77-126 <br /> Fthanol 112 t00 " 100 112 55-200 <br /> Ethvlbenzene 5 64 0 50 5 00 113 89-122 <br /> Ethyl tert-butyl ether 604 1 0 " 5 00 121 71-120 QCOI <br /> Methvl tort-butvl ether 5 63 0 50 " 5 00 113 70-122 <br /> Toluene 5 31 0 50 5 00 106 84-119 <br /> Xylenes(total) 17 2 0 50 15 0 115 86-132 <br /> Surrogate Dib;oniofluoionietham 515 500 103 84-12' <br /> Surrogate 12-Dichi'moethane d4 5 24 500 105 74-135 <br /> 5w i ogate Tal iieirt-eM 4 T5 .500 91 84-119 <br /> Surrogate 4-Bronroflaoiohett_eac 4 75 500 95 86-119 <br /> 40 nota Analytical-Petaluma The i evuh,;in this repair apph to the iarriple$atrah zed ttt ac eoi dance u ith fire chant <br /> of c tis Lodi doc knit tit Unless other ii i ve s tart i1 t e5tilry ai e r c pot ted ori a vi et ii eight <br /> hacit TItiS atiallfteal repot t»hist he iepiochiced iit tiv etititeiv <br /> Page 23 of 35 <br />