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(D Sequoia 1455 WDowell Blvd,]North Ste D <br /> I'etalurn i CA 94954 <br /> FAX(707)792-0342 <br /> www sequoialabs coni <br /> URS Corp-Sacramento Project Arca Site 5469 Stockton CA P403099 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36605 Reporter! <br /> Sacramento CA,95833 Project Manager Jay Johnson 04/06/04 17 16 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result [imtt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-4(P403099-04RE 1)Water Sampled 03/04/04 08 38 Rei rived 03/04/04 10 27 <br /> Methyl Cert-butyl tther 33000 1000 ug4 2000 4030416 03/15/04 03/16/04 EPA 8260B <br /> Srutogate Dihionfollumonrctlrane 108`% 84-122 <br /> Sratogate 1 2-Utchloioethane-d4 117% 74-135 <br /> Sruiogate Tolrrene-dR 87`% 84-119 <br /> Sratogate 4-Bt0ntoflrtoiohen�ene 95% 86419 <br /> MW-5(P403099-05)Water Sampled 03/04/0,197 57 Received 03/04/04 10 27 <br /> Tert-amyl methyl ether i 1 1 0 ugil 1 4030340 03/12/04 03/13/04 FPA 8260B <br /> BLnzene ND 0 50 <br /> Tert-butyl alcohol ND 2{1 <br /> Di-isopropyl ether ND 10 " <br /> I 2-Dibromoethane(EDB) ND 0 50 " <br /> 1 2-Dichloroethane ND 0 50 <br /> 0' <br /> ND 100 <br /> Whylb,n7ene ND 050 <br /> Ethyl tert-butyl ether ND 10 „ <br /> Toluene ND 0 50 <br /> Xylenes(total) ND 050 <br /> Stu i ogate Drht onioflum oniethane 103 "/o 84-122 <br /> Swiogare 1 2-Dichlntoerhane-d4 106 % 74-135 <br /> Suftogate Tolrieae-d8 90% 84-119 <br /> Swi ogate 4-Bt oniofluor nhen_ure 95 % 86-119 <br /> MW-5(P401099-05RE1)Water Sampled 03/04/04 07 57 Rei.eived 03/04/04 10 27 <br /> Methyl Cert-butyl ether 1200 25 ug/l 50 4030422 03,16/04 03/16/04 FPA 8260B <br /> Sra i t gate Dthi ontoflum oniethatie 106 % 84-122 <br /> Stu r ogate 1 2-Drcldoi oetlrane-d4 114% 74-135 <br /> Srntogale Tolrrene-d8 S5°n 84-119 <br /> Siu r ngate 4-Bi oniofhem ohen�cne 93 % 86-119 <br /> uota Analytical- Petaluma The tesfdty in tarty report applt to file suniplev onali_ed in accatdance xtth the churn <br /> ufctryrods dnctrnrcn! Unhlsyothetitrae stated tevulty aft repotted an a ket vietght <br /> hurts Thtsatiallrxaltepattnittvfhettptoclucedrntrvtnrnefi <br /> Page 9 of 35 <br />