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819 Striker Ave Ste 6 <br /> Sequoia Sacra mrno,CA 95634 <br /> ' (916)921-9600 <br /> ► Analytical FAX(916)921-010labsc0 <br /> www sequotalabs om <br /> Gettler-Ryan-Dublin Project Former Unocal 2859,Stockton,CA S305466 <br /> 6747 Sierra Court,Ste J Project Number' NIA Reported, <br /> Dublin CA,94568 Project Manager Deanna L Harding 06/03/03 18 41 :1" <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M 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 3050448-EPA 5030B TM _ <br /> Laboratory Control Sample(3050448-1 S2) Prepared&Analyzed 05/27/03 <br /> Surrogate a a a-Trifluorotoluene 986 149/1 100 99 60-140 <br /> Batch 3050464-EPA 5030B(Pa) <br /> Blank(3050464-BLKI) Prepared&Analyzed 05/28/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> - Xylenes(total) _ _ ND - 050 <br /> Methyl tert-butyl ether ND 20 " <br /> Surrogate a a a-Trifluorotoluene 932 100 93 60-140 . <br /> Blank(3050464-BLK2) Prepared&Analyzed 05/29/03 <br /> Purgeable Hydrocarbons ND 50 ug/1 - y <br /> Benzene ND 050 " <br /> Toluene ND-O 50--" `— <br /> Ethylbenzene ND 050 " <br /> N- — 050 --_ —_ ----- - ,-- -- --- - - - - _�_ <br /> =- Methyl tert-butyl ether �ND='= ==2 0-- _- -----_ - - _ - -— — - -- - - - - <br /> Surrogate a a,a-Trifluorotoluene 991 100 99 60-140 <br /> Blank(3050464-BLK3) Prepared&Analyzed 05/30/03 <br /> Purgeable Hydrocarbons ND 50 ug/l <br /> Benzene ND 050 " <br /> Toluene ND 050 n <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 0 " <br /> Surrogate a a a-Triuorotoluene 879 100 88 60-140 <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 stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 16 of 20 <br />