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Sequoia 1455 McDowell Blvd North Ste D <br /> Petaluma CA 94954 <br /> y (707)792-18b5 <br /> Anal � ica FAX(707)792-0342 <br /> www sequoialabs com <br /> • <br /> URS Corp-Sacramento Protect Arco Site 5469,Stockton,CA P403099 <br /> 2870 Gateway Oaks Drive Suite 300 Protect 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 /> Reporting Spike Suurt,e °/REC RPD <br /> Anllyte Result I mut knits Level Result %RHC Linins RPD Limit Notes <br /> Batch 4030340-EPA 5030B waters <br /> Matrix Spike(4030340-MS1) Source P401167-10 Prepared 03/12/04 Analyzed 03/13/04 <br /> Tert-anivl inethvl ether 5 53 10 Ug/I 500 ND 11] 78-117 <br /> Benzene 5 48 050 5 00 ND 110 81-11b <br /> Tert-butyl alcohol 108 20 100 ND 108 60-147 <br /> Di-isopropyl ether 5 65 1 0 5 00 ND 113 70-125 <br /> l 2-Dibromoethane(EDB) 5 47 050 5 00 ND 109 85-125 <br /> l 2-Dichloroethane S 80 050 500 ND 116 77-126 <br /> Ethanol 114 100 100 ND 114 55-200 <br /> Ethvlbenzene 5 68 0 50 500 ND 114 89-122 <br /> Ethyl ten-butyl ether 5 63 1 0 5 00 ND 113 71-120 <br /> Methyl tent-butyl ether 7 39 0 50 5 00 1 9 110 70-122 <br /> Toluene 5 28 0 50 5 00 ND 106 84-119 <br /> neo(total) 17 5 0 50 15 0 ND 117 86-132 <br /> i t ogatt Dihi ontoJluot oniethane 5 0> 1 00 100 R4-122 - <br /> - <br /> Statogate 1 2 Dichloioethane-d4 4 92 5 00 98 74-135 <br /> Suitogatt Toluetre-418 4 63 5 00 93 84-119 <br /> 5iniogote 4-Biomof itwobinzene 4 99 5 00 100 86-119 <br /> -- - 3104 <br /> Matrix p►kebuP(4030140-'bISDI) Som P4011b7-10 Prepared 03/ '�i /04 Analyzed 0311, .-, <br /> Tert-amyl methyl ether 5 53 1 0 ugll 5 00 ND 111 78-117 0 20 <br /> Benzene 5 52 0 50 500 ND 110 81-118 0 7 20 <br /> Tert-butyl alcohol 107 20 100 ND 107 60-147 0 9 20 <br /> tat-isopropvl ether 5 90 1 0 500 ND 118 70-125 4 20 <br /> t 2-Dibromoethane(EDB) 5 69 0 50 5 00 ND 114 85-125 4 20 <br /> 1 2-Dichloroethane 5 S7 0 50 500 ND 117 77-126 l 20 <br /> Ethanol [17 100 100 ND 117 55-200 3 20 <br /> Ethylbenzene 5 59 0 50 500 ND 112 59-122 2 20 <br /> hthvl tert-butvt ether 5 85 1 0 5 00 ND 117 71-120 4 20 <br /> Methyl tert-butyl ether 7 6S 0 50 5 00 1 9 116 70-122 4 20 <br /> Toluene 5 32 0 50 5 00 NO 106 84-119 0 8 20 <br /> Xylenes(total) l 7 4 0 50 15 0 ND 116 86-132 0 6 20 <br /> Srniogate Dibtrnnof umontethane 4 91 500 98 84-122 <br /> Suiiogate 1 2 Dichlotoeihatre-d4 4 88 500 98 74-135 <br /> Suirogate Tolueire-d8 4 42 500 88 54-119 <br /> Sroiogate 4-Btotnofhtoioheircene 5 10 Soo 102 86-119 <br /> toia Analytical -Petaluma The iesults tit this lepoit upph to the samples anali_cd tit accordance rirth the chant <br /> of,ustodi docrimeirt Utrlt cs otht i is m start d i wilts ai e i epos ted nn a rtet"eight <br /> bays Thi sanahtical rtpot tniustheieprodwedinrtsenitieti <br /> Page 22 of 35 <br />