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A 1455 McDowell Blvd,North Ste D <br /> (D Sequoia Petaluma CA 949'14 <br /> Analfie FAX(707)792-186'1 <br /> a 707)792-01,42 <br /> www sequordabs coni <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 ProjeLt 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 Source 0%R FC RPD <br /> lAn,ilyte Result Limit Units Level Result 64REC I rinds RPD Limit Notes <br /> Batch 4030422-EPA 5030E waters <br /> Laboratory Control Sample Dup(4030422-BSDt) Prepared&Analyzed 03/16/04 <br /> Tert-amyl methyl ether 5 73 10 _9111 5 00 115 78-117 10 20 <br /> Benzene 5 32 050 5 00 106 &I-] IS 0 9 20 <br /> Tert-butyl alcohol 101 20 100 101 60-147 2 20 <br /> Di-isopropyl ether 6 19 l 0 5 00 124 70-125 10 20 <br /> 1 2-Dibromoethane(EDB) 5 75 0 50 5 00 115 85-125 13 20 <br /> 1 2-Dichloroethane 6 05 0 50 5 00 121 77-126 5 20 <br /> Ethanol 92 7 100 100 93 55-200 15 20 <br /> Ethylbenzene 5 33 050 5 00 107 89-122 4 20 <br /> Ethyl tert-butv] ether 6 09 1 0 5 00 122 71-120 13 20 QC21 <br /> Methyl tert-butyl ether 5 S2 050 5 W 116 70-122 115 20 <br /> Toluene 4 98 0 50 " 5 00 100 84-119 5 20 <br /> nes(total) 16 4 050 15 0 109 86-132 2 20 <br /> u i ogare Dibt nutnfhim mirethrme 5?1 " 5 00 104 84-122 - - -- <br /> Sutroguie 1?-D chloioethane-d4 5 52 500 110 74-135 <br /> Stir i oguie Toluene-d8 442 500 88 84-119 <br /> Stutogate 4-Brmttoflumohen_ene 4 81 5 00 96 86-119 <br /> Batch 4030493-EPA 5030E waters <br /> Blank(4030493-BLKI) Prepared&Analyzed 03/18/04 <br /> Tert-amyl inethvl ether ND 1 0 ugll <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-tsopropvl ether ND 1 0 " <br /> 12-Dibromoethane(EDB) ND 0 50 " <br /> 1 2-D1ch10roethane ND 0 50 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Fthyl tert-butyl ether ND 1 0 " <br /> Methvl tert butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xvlenes(total) ND 0 50 <br /> Stu i cigate Dibi om0f]uot onlethatre 5 80 600 97 84-122 <br /> Stutogate 1 '-Dichloioelhane d4 140 6 00 90 74-135 <br /> Surrogate Toluene-d8 5 93 600 99 84-119 <br /> Stutogate 4-Btnntoflitaohen_ene h 05 600 101 86-119 <br /> nota Analytical-Petaluma Tire teiuTts rn tluc repo t upplt to rhe cwnples anali.ed to uccnrdance wrtlr the chars <br /> of custod4 dncuntent Unless othertttse staled results ate reported ou a Hct Hqrght <br /> busts Tlus curaltucal report rtttts!he reproduced ur its enurett <br /> Page 26 of 35 <br />