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9W5 McDowell Blvd,Forth Ste D <br /> Stequoia Petalumt ('A 94924 <br /> (707)792 1 <br /> FAX <br /> (707)792-0342342 <br /> www sequotalabs nom <br /> URS Corp-Sac.rarnLnto Proleu Arco Site 5469 Stockton CA P403099 <br /> 2870 Gateway pals Drive State 300 ProJet,t Number WR36605 Reported <br /> Sacramento CA,95833 Project Manager .lay Johnson 04/06/04 17 16 <br /> Volatile Organic Compounds by EPA Method 8260B-Quality Control <br /> Sequoia Analytical -Petaluma <br /> Reporting Spike Source %R1=C RPD <br /> lAyiqlvle Result I unit Units Level Result 01 REC. I tmtts RPD Limit Notes <br /> Batch 4030422-EPA 5030B waters <br /> Blank(4030422-BLKI) Prepared&Analyzed 03/16/04 <br /> Tert-atnvl inethvl ether ND 1 0 ug/l <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Dt-isopropyl ether ND 10 " <br /> 1 2-13tbrornoetlivie(EDB) ND 0 50 " <br /> l 2-Dtchloroethane ND 050 " <br /> Ethanol ND t00 <br /> Ethvlbenzene ND 050 <br /> Fthvl tett-butvl ether ND l 0 " <br /> Methyl tt,rt-butv]ether ND 040 IT <br /> Toluene ND 050 <br /> nes(total) ND 050 " <br /> -mviewait, Drhiouiofluoionu thane 5 45 500 109 84-172 <br /> Swrogute 1 2-Drclrlaoerhaire-d4 6 03 5 00 131 74-135 <br /> Srarogare Toluene-eM 4 47 5 00 89 84-119 <br /> Smiogate 4-BromofluoroheR_Eni 4 6,N 5 00 94 6-119 <br /> Laboratory Control Sample(4030422-BSI) Prepared&Analyzed 03/16/04 <br /> Tert-amvl methvl ether 5 2l 10 ug/l 500 104 78-117 <br /> Benzene 5 37 0 50 500 107 81-118 <br /> Tert-butvl alcohol 103 20 100 103 60-147 <br /> Dt-tsopropvl ether 5 61 1 0 5 00 112 70-125 <br /> 1 2-Dibromoethane(FDB) 5 07 0 50 5 00 101 85-125 <br /> 1 2-Dtchloroethane 5 76 0 50 5 00 115 77-126 <br /> Ethanol X08 100 t00 l05 55-200 <br /> Ethylbenzene 5 56 0 50 5 00 111 89-122 <br /> Ethyl tert-hutyl ether 5 36 1 0 5 00 107 71-120 <br /> Methyl tert-butvl ether 5 00 0 50 5 00 100 70-122 <br /> Toluene 5 26 0 50 IT 5 00 105 84-119 <br /> Xylenes(total) 16 7 0 50 15 0 111 86-132 <br /> Sri)r ogare Drhr onsojhioi nnic thane 4 09 5 00 94 84-122 <br /> Srrr r orate 1 2-Drt h1 ur oe rharre-d4 4 N5 5 00 97 74-135 <br /> Swiogatc Tohiene-dS 4 48 5 00 90 84-119 <br /> Swiogate 4-Brvmnflawohcx:cire 4 86 " 5 00 97 .46-119 <br /> LIM Analytical-Petaluma The iesulte in rhes report apph to the sumples analtxd in a,cordutite utth lire chain <br /> ofctrstodt docainew Utrh ss wheimie crated results are reported on a Her lielghl <br /> haws Thor arrali tical repos t num he i eproduced m its entrrett <br /> Page 25 of 35 <br />