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819 Striker Avenue Surte 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequoialabs corn <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 /> Analyte Result Limit Units Level Result ISREC Limits RPD Limit Notes <br /> Batch 1 F'15003- EPA 5030B PIT <br /> Blank(IF15003-BLKI) Prepared&Analyzed 06/16/01 <br /> Purgeable Hydrocarbons ND 10 mg/m'Air <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 <br /> Surrogate a a a-Tr fluorotoluene 5 28 600 880 70-130 <br /> Blank(IF15003-BLK2) Prepared&Analyzed 06/18/01 <br /> tugeable Hydrocarbons ND 10 mg/ml Air <br /> ertzene ND 010 <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 <br /> Xylenes(total) ND 010 " <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate a a a-Trti luorotoluene 528 6 00 880 70-130 <br /> Blank(IFI5003-BLK3) Prepared&Analyzed 06/19/01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 " <br /> Toluene ND 010 " <br /> Ethylbenzene ND 010 " <br /> Xylenes(total) ND 010. <br /> " <br /> Methyl Cert-butyl ether ND 050 " <br /> Surrogate aaa-Trifluoratoluene 516 6 00 860 70-130 <br /> Blank(1F15003-BLK4) Prepared&Analyzed 06/20/01 <br /> Purgeable Hydrocarbons ND 10 mg/ml Air <br /> Benzene ND 010 <br /> Toluene ND 010 " <br /> Ethylberizene ND 010 " <br /> Xylenes(total) ND 010 <br /> Methyl tert-butyl ether ND 050 " <br /> Surrogate aaa-Trtfluorotoluene 524 600 873 70-130 <br /> 0 <br /> Sequoia Analyticai-Sacramento The results to this report apply to the samples analyzed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 5 of 8 <br />