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Sequoia Walnut <br /> N WiLane <br /> t Creek CAA 94598 <br /> (925)98&9wo <br /> Analytical FAX(925)98&9673 <br /> Iwo- <br /> Wer Ryan,In, -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal SS#5886 Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 14-Sep-99 l7 49 <br /> Volatile Organic Compounds by EPA Method 8260A- Quality Control <br /> Sequoia Analytical -Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Lutist Units Level Result 4/6REC Limits RPD Limit Notes <br /> BAtcli 9H31005: Prepared 30-Aug-99 Using EPA 5030B (PIT] <br /> Blank(9H31005-BLK1) <br /> Ethanol ND 500 ugn <br /> tent-Butyl alcohol ND 100 " <br /> Methyl.tort-butyl.thar ND 20 " <br /> Dmsopropyl ether ND 20 " <br /> Ethyl tort-butyl ether ND 20 <br /> tent-,amyl methyl ether ND 20 " <br /> Surrogate Dibromofluoromethm[e 535 Soo 10- 70-150 <br /> Surrogate 13-Drchloroetharre-d4 52 7 Soo 105 SIJ-150 <br /> LCS(9H31005-BSI) <br /> blethvl tett-huts I ether 55 9 20 ug l 500 112 70-130 <br /> S off, (. Drhr[nrrofluororrretharrc -)2 % 500 111 50-1)o <br /> fat[ 12-Drchloroetham-r14 521 500 104 50-150 <br /> Matrix Spike(9H31005-MSI) SaurU W908373-12 <br /> %IcthN[tert-butvl ether 531 20 ugfl 500 N D 106 60-140 <br /> Surrogate Drbror[rofluororuethane 538 500 108 50-150 <br /> 5urrugette 12-Dichloroethar[e-d4 531 500 106 50-1511 <br /> Matrix Splhi Dup (')H31005-NISD1) SourIe W90837342 <br /> %lethvl ten-hutvl ether 524 20 ngrl 50 U ND 105 60 140 133 25 <br /> Surrogate D[brorno)luoronretha[re 535 500 10- 50450 <br /> Surrogate l 2-Drchluroethane(14 533 500 10- 50.1.)0 <br /> Squola Analvacal - Walnut Creels 77[e reralts in Ik r report apply to the munpki cm[dy-ed in[rcordmce will:the clean of <br /> custody document 7'las awlyneul report muse be reprrxlueed m[tc enarery <br /> '!414 cg 4. rqt- t snag P ige 15 ut 16 <br />