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404 N Wiget Lane <br /> Sequoia Walnut Creek CA 94598 <br /> t975l 988-9600 <br /> FAX(925)988-9673 <br /> Analytical www sequotaiabs com <br /> Gettler Ryan,Inc -Dublin Project Unocal <br /> 6747 Sterra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA 94568 Project Manager Scott Polston 10-Jul-01 11 15 <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 /> Analvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1 F22003- EPA 5030B PIT <br /> LCS Du (IF22003-BSDI) Prepared 22-Jun-01 Analyzed 26-Jun-01 <br /> Benzene l 53 0 10 mg/m'Air 200 765 70-130 350 25 Q-01 <br /> Toluene 178 010 200 890 70-130 211 25 <br /> Ethylbenzene 1 76 0 10 200 880 70-130 23 1 25 <br /> Xylenes(total) 5 74 0 10 600 95 7 70-130 1 9 9 25 <br /> Surrogate a a a-TriJluorotoluene 532 600 887 70-130 <br /> Sequoia Anaiyttcal- Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its enitrety <br /> Page 6 of 7 <br />