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819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921-9600 <br /> vow Analytical FA sequot labsc2 1 irn <br /> 1 www sequo�alabs corn <br /> Gettler-Ryan-Dublin Project Former Unocal 0187,Stockton,CA 5302221 <br /> 6747 Sierra Covet,Ste l Project Number NIA Reported <br /> Dublin CA,94568 Project Manager Deanna L Harding 02/28/03 19 02 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 80151ki and 8021B- Quality Contr <br /> Sequoia Analytical - Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3020192-EPA 5030B(PIT) _ <br /> Blank(3020192-BLK1) Prepared&Analyzed 02/13/03 <br /> Purgeable Hydrocarbons ND 50 ugll <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzcne ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 2 0 " <br />—Surrogate a a a-Triuorotoluene 113 100 113 60-140 <br /> Blank(3020192-BLK2) Prepared&Analyzed 02/14/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene - _ ND 050- <br /> Toluene <br /> 50 Toluene ND 050 . <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Surrogate a a a-Triuorotoluene 109 " 100 109 60-140 <br /> Blank(3020192-BLK3) Prepared&Analyzed 02/20/03 <br /> Purgeable Hydrocarbons -ND 50 — ug/1— <br /> Benzene ND 0 50 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate a a a-Trifluoratoluene 105 100 105 60-140 <br /> Laboratory Control Sample(3020192-BSI) Prepared&Analyzed 02/13/03 <br /> Benzene 107 0 50 ugA 100 107 70-130 <br /> Toluene 11 1 0 50 100 111 70-130 <br /> Ethylbenzene 115 050 100 115 70-130 <br /> Xylenes(total) 324 050 300 108 70-130 <br /> Methyl tert-butyl ether 105 2 0 100 105 70-130 <br /> Sequoia Analytical - Sacramento The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless otherwise stared results are reported on a wet weight basis Ye <br /> This analytical report must be reproduced in its entirety <br /> Page 23 of 33 <br />