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Road <br /> ustria <br /> ,�i) Sequoia San Carlos CA 194070 <br /> (650)232.9600 <br /> Analytical <br /> FAX(650)232-9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unoca](4) <br /> 6747 Sierra Court, Suite J Project Number Former Unocal#5098& Montgmery Ward Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 03/26/02 12 44 <br /> Volatile Qrganic Compounds by EPA Method 8260B - Quality Control <br /> Sequoia Analytical - San Carlos - <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Luna Units Level Result %REC Limits RPD Limit Notes <br /> Batch 2030023-EPA 5030B CP/T] - — <br /> Matrix Spike Dup(2030023-MSDI) Source L203015-25 Prepared&Analyzed 03/14/02 <br /> Benzene - 16 2'- 2 0 ugll 200 ND 810 60-140 116 25 <br /> Chlorobenzene 158 20 200 ND 790 60-140 173 25 <br /> 1,1-Dichloroethene 35 8 20 200 ND 790 60-140 433 25 <br /> Toluene 154 20 200 ND 770 60-140 128 25 <br /> "trichloroethene 170 20 200 ND 85 0 60-140 122 25 <br /> Surrogate 12-Dichloroethane-d4 102 100 102 63-118 <br /> Surrogate Toluene-d8 101 100 101 88-110 <br /> Surrogate 4-BFB 113 100 113 86-115 <br /> _ <br /> Sequoia Analytical - San Carlos The results in this repot apply 10 the samples analyzed in accordance mall the chain of� <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 87 of 91 <br />