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819 Ave Ste 8 <br /> Sequoia SacramenttorCA 95834 <br /> (916)921-9604 <br /> 11OW Analytical FAX(916)9210100 <br /> go www sequoialabs corn <br /> ler-Ryan-Dublin Project Former Unocal 5098,Stockton,CA S302592 <br /> Sierra Court,Ste J Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L ]Harding 03/10/03 17 17 <br /> Volatile Organic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> arch 3030025-EPA 5030B JP/Tl <br /> Matrix Spike Dup(3030025-MSA1) Source 5302565-02 Prepared&Analyzed 03/04/03 <br /> enzene 225 050 ug/l 250 ND 90 60-140 7 25 <br /> lorobenzene 23 4 050 250 ND <br /> 94 60-140 14 25 <br /> 1,1-Dichloroethene 21 5 050 250 ND 86 60 140 7 25 <br /> luene 23 6 050 250 ND 94 60-140 17 25 <br /> 1chloroethene 133 050 250 140 NR 60-140 9 25 QM4X <br /> arrogate 12-DCA-d4 253 250 101 60-140 <br /> i r ogate Dibi omofluor omethane 249 25 0 100 70 130 <br /> r rogate 12-DCA-d4 253 250 101 70-130 <br /> 5w i agate Toluene-d8 268 250 107 70-130 <br /> 1n agate 4 BFB 264 250 106 70-130 <br /> 3030057-EPA 5030B P/T <br /> (3030057-BLKI) Prepared 03/05/03 Analyzed 03/06/03 <br /> '$enzene 'ND 050 ug/l <br /> I'lomochloromethane <br /> omobenzene ND 050 <br /> n-butyl alcohol ND 100 <br /> ND 050 " <br /> Bromodichloromethane ND 050 " <br /> Ii-isopropyl ether ND 20 <br /> romoform ND 050 " <br /> Ethyl tent butyl ether ND 2 0 " <br /> romornethane ND 10 <br /> ert-amyl methyl ether ND 2 0 <br /> Ethanol ND 500 <br /> Butylbenzene ND 0.50 <br /> 2-Dichloroethane ND 2 0 " <br /> sec-Butylbenzene ND 050 " <br /> 02-1)"'romoethane(EDB) ND 2 0 <br /> rt-Butylbenzene ND 050 <br /> arbors tetrachloride ND 050 " <br /> aihlorobenzene ND 050 " <br /> chloroethane ND 050 =, <br /> hlorofornt ND 050 <br /> Chloromethane ND 050 " <br /> I _ <br /> �ia Analytical - Sacramento The r esulrs in this i eport apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated i esults are?eporled on a wet weight basis <br /> This analytical report must be repi oduced in its entirety <br /> Page 1 l3 of 126 <br />