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404 N Wiget Lane <br /> Sequoia Walnut Creek C94598 <br /> (9z5)988 8-9600 <br /> FAX(925)988-9673 <br /> Analytical - www sequoiaiabs com <br /> Gettler Rvan Inc -Dublin Project Unocal <br /> 6747 Sierra Court Suite J Project Number Unocal#2859 Reported <br /> Dublin CA 94568 Project Manager Scott Palston 29-Jun-01 09 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 Lunit Ututs Level Result %REC Limits RPD Ltrtut Notes <br /> Batch I F15003-EPA 5030B PIT <br /> Blank(1F15003-BLKI) Prepared&Analyzed 16-Jun-01 <br /> Purgeable Hvdrokarbons ND 10 mglrrt3 Air <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethvlbenzene ND 010 <br /> Xvlenes(total) ND 0 10 <br /> Mahvi tent-butvi ether ND 050 <br /> Surrogate aaa-Trrfluorotoluene 528 600 880 70-130 <br /> Blank(IF15003-BLKI) Prepared&Analyzed 18-Jun-01 <br /> urgeable Hvdro,.arbons ND 10 mgim3 Air <br /> emcne ND 010 <br /> Toluene ND 010 <br /> Ethvlbenzene ND 010 <br /> Vlenes(total) ND 0 10 <br /> Methvi tert-butyl ether ND 050 <br /> Surrogate a a a-TnJluorotoluene S28 600 88 0 70-130 <br /> Blank 0 F15003-BLK3) Prepared&Analvzed 19-Jun-01 <br /> Purgeahle Hvdrocarbons ND 10 mglm3 Air <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethvlbenzene ND 010 <br /> %vlenes(total) ND 010 <br /> Methvl tent butyl ether ND 0 50 " <br /> Surrogate aaa-Tnhuorotoluene 516 600 860 70-130 <br /> Blank(IF15003-BLK4) Prepared&Analyzed 20-Jun-01 <br /> Purgeable Hvdrocarbons ND 10 m&W Air <br /> Benzene ND 010 <br /> Toluene ND 010 <br /> Ethvlbenzene ND 010 <br /> Xylenes(total) ND 0 10 " <br /> Methvl tert-butvl ether ND 0 50 <br /> Surrogate a a a-Tri luorwoluene 524 600 873 70.130 <br /> 0 <br /> Sequoia Analvocal-Walnut CIeek 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 in its entirety <br /> Page 4 of 6 <br />