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819 Striker Avenue Suite 8 <br /> Sequoia u e 92 -96M <br /> (916)9x1-9600 <br /> FAX(916)921-0100 <br /> 01WO Analytical www sequokikbs—m <br /> Gettler-Ryan-Dublin Project Unocal 2859 Stockton CA <br /> 6747 Sierra Court Ste J Project Number N/A Reported <br /> Dublin CA 94568 Project Manager S Polston 07/03/01 16 34 <br /> Total Purgeable Hydrocarbons (C6-C12), BTEX and MTBE by DHS LUFT - Quality Control <br /> Sequoia Analytical - Walnut Creek <br /> Reporting Spike Source %REC RPD <br /> Anaiyte Result Limit Units Level Result ".RFX Limits RPD Limit Notes <br /> Batch 1F15003- EPA 50308 P/T <br /> LCS(1 F15003-BS4) Prepared&Analyzed 06/20/01 <br /> Benzene 434 0 10 mg/m'Act 400 108 70-130 <br /> Toluene 3 82 Oto 400 95 5 70-130 <br /> Ethylbenzene 394 0 10 400 985 70-130 <br /> Xylenes(total) 119 0 10 12 0 992 70-130 <br /> Surrogate a a a-Trifluorotoluene 6 08 600 101 70-130 <br /> LCS(1F15003-BS5) Prepared&Analyzed 06/21/01 <br /> Benzene 4 50 0 10 mg/m'Air 400 112 70-130 <br /> Toluene 382 010 400 955 70-130 <br /> WXthylbenzene 378 0 l0 400 945 70-130 <br /> ylenes(total) 122 oto 120 102 70-130 <br /> Surrogate a a a-Trrfluorotoluene 628 600 105 70-130 <br /> LCS Dup(1F15003-BSD1) Prepared&Analyzed 06/16/01 <br /> Benzene 161 0 10 mg/m'Air 200 805 70-130 268 25 Q-07 <br /> Toluene 200 0 10 200 100 70-130 266 25 Q-07 <br /> Ethylbenzene 200 0 10 200 100 70-130 198 25 <br /> Xylenes(total) 642 0 l0 600 107 70-130 269 25 Q-07 <br /> Surrogate a a a-Trcfluorotoluene 666 600 111 70-130 <br /> 0 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety <br /> Page 7 of 8 <br />