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404 N Wiget lane <br /> Sequoia Walnut Creek <br /> (9 5)8&960000 <br /> FAX(925)988-9673 <br /> Analytical www sequoialabs com <br /> Gettler Ryan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA 94568 Project Manager ScottPolston 29-Jun-01 09 15 <br /> Total Purgeable Hydrocarbons (C6-Cl 2), BTEX and MTBE by DHS LUFT- Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> IA.naivte Result Lima Units Level Result %REC Luntts RPD Linut Notes <br /> Batch 1FI5003-EPA 5030B PIT <br /> LCS 0F15003-BSI) Prepared 16-Jun-01 Analvzed 18-Jun-0I <br /> Benzene 123 0 10 mg/ml Air 200 615 70-130 Q-01 <br /> Toluene 153 010 200 765 70-130 <br /> Ethvlbenzene 1 64 0 10 200 820 70430 <br /> \vlenes(total) 490 0 10 600 917 70-130 <br /> Surrogate aaa-Trrfluoroioluene 540 600 900 0-130 <br /> LCS(I F1 5003-BS2) Prepared&Analyzed 18-Jun-0i <br /> Benzene 330 0 10 mg/m3 Air 400 825 70-130 <br /> Toluene 3 52 0 10 400 880 70-130 <br /> 0 thylbenzene 366 010 400 915 70-130 <br /> ylenes(total) 108 010 120 900 70-130 <br /> Surrogate aaa-Trtfluorotoluene 548 600 913 70-130 <br /> LCS(1 F15003-BS3) Prepared&Analvzed 19-Jun-01 <br /> Benzene 456 0 10 mg/m'Air 400 114 70-130 <br /> Toluene 374 0 10 400 93 5 70-130 <br /> Ethvlbenzene 374 0 10 400 935 70430 <br /> \vlenes(total) 118 010 120 983 70430 <br /> Surrogoie a a a-Trrfluorotoluem 6 02 600 100 -0-130 <br /> LCS(IF15003-BS4) Prepared&Analyzed 20-Jun-01 <br /> Benzene 434 0 10 mg/ml Air 400 108 70-130 <br /> Toluene 3 82 010 400 95 5 70-130 <br /> Ethylbenzene 394 010 400 985 70-130 <br /> Xylenes(total) 119 0 10 120 992 70-130 <br /> Surrogate aaa-Trtfluormoluene 608 600 101 70.130 <br /> 0 <br /> Sequola Analvtical- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Thts analytical report must be reproduced to its enttrery <br /> Page 5 of 6 <br />