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819 Straker Ave 8 <br /> I—a) Sequoia Sacramento,CA 95858 34 <br /> (916)921-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequotalabs cam <br /> U0Ier-Ryan-Dublin Project Former Unocal 5098, Stockton, CA 5302592 <br /> Sierra Court,Ste J Project Number N/A Reported <br /> 0u <br /> ,1, 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 /> Reporiutg Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Latch 3020415-EPA 5030B IP/3 <br /> Laboratory Control Sample(3020415-BSI) Prepared&Analyzed 02/28/03 <br /> nzene 240 050 ug/l 250 96 70-130 <br /> lorobenzene 24 7 050 25 0 99 70-130 <br /> ,1-Dichloroethene 241 050 250 96 70-130 <br /> 1luene 266 050 25 0 106 70-130 <br /> chloroethene 21 6 050 25 0 86 70-130 <br /> Surrogate 1 2-DCA-d4 13 7 250 95 60-140 <br /> Irrogate DtbromoJluoromethane 13 9 250 96 70-130 <br /> rrogate 11-DCA-d4 23 7 25 0 95 70430 <br /> Surrogate Toluene-d8 28 4 250 114 70-130 <br /> rrogate 4-BFB 271 250 108 70-130 <br /> Matrix Spike(3020415-MSI) Source S302592-23 Prepared& Analyzed 02/28/03 <br /> 24 8 050 ug/I 25 0 1 0 95 60-140 <br /> enzene 24 6 050 25 0 ND 98 60-140 <br /> 1,1-Dichloroethene 23 0 050 25 0 ND 92 60-140 <br /> luene 26 7 050 ;i 25 0 075 104 60 140 <br /> chloroethene 21 6 050 25 0 ND 86 60-140 <br /> rogate 1 1-DCA-d4 239 2.50 96 60-140 <br /> rrogate DtbromoJluoromethane 243 25 0 97 70-130 <br /> ur rogate 12-DCA-d4 23 9 25 0 96 70 130 <br /> rrogate Toluene-d8 277 25 0 111 70-130 <br /> rrogate 4-BFB 270 15 0 108 70-130 <br /> strix Spike Dup (3020415-NISDI) Source 5302592-23 Prepared& Analyzed 02/28/03 <br /> nzene 248 050 US/] 25 0 1 0 95 60-140 0 25 <br /> lorobenzene 234 050 25 0 ND 94 60-140 5 25 <br /> 1 1 Dichloroethene 224 050 25 0 ND 90 60 140 4 25 <br /> filuene 250 050 " 25 0 0 75 97 60-140 7 25 <br /> chloroethene 205 050 25 0 ND 82 60-140 5 25 <br /> irrogate 12-DCA-d4 253 15 0 101 60-140 <br /> rrogate Dtbromolluoromethane 261 25 d 104 70-130 <br /> Surrogate 1,2-DCA-d4 153 250 101 70-130 <br /> is Anaiytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless other mse stated results ai e r epor ted on a wet weight basis <br /> This analytical repo+t must be rep+oduced in its entirety <br /> Page 109 of 126 <br />