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619 StrWer Ave Ste 8 <br /> Sequoia Sacramento,CA 95634 <br /> (& (916)923-9600 <br /> Analytical FAX(916)921-0100 <br /> www sequeialabsxom <br /> • <br /> Geological Technics,Inc Prclett Montas Bros S508570 <br /> ' 1101 7th Street Project Number 724 2 Reported <br /> Modesto CA,95354 Project Manager Geological Technics,Inc 09/09/05 16 21 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B18021B- Quality Control <br /> ' Sequoia Analytical Sacramento <br /> Reporting Spike Source %RFC RPD <br /> Analyte Result Limit Units Level Result %RFC Limits RPD Limit Notes <br /> Batch 5090038-EPA 50308 IT /EPA 8015B/8021B <br /> Blank(5090038-BLKI) Prepared&Analyzed 09/02/05 <br /> ' Gasoline Range Organics(C4 C12) ND 50 ug/I <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Benzene ND 0 50 " <br /> Benzene ND 0 SO " <br /> ' Toluene ND 0 50 n <br /> Toluene ND 0 50 <br /> Ethylbenzene ND 050 " <br /> ' Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether ND 20 " <br /> Wrrogate 4-BFB(FID) 8 36 10 0 84 60-140 <br /> ri-ogate 4-BFB(FID) 836 100 84 60-140 <br /> Surrogate a,a;a-TFT(PID) 987 100 99 60-140 <br />' Sun ogate a a a-TFT(PID) 987 10 0 99 60-140 <br /> Blank(5090038-BLK2) Prepared&Analyzed 09/06/05 <br /> Gasoline Range Organics(C4-C 12) ND 50 USA <br />' Gasoline Range Organics(C4-02) ND 50 " <br /> Benzene ND 050 <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br />' Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Eth)lbenzene ND 050 " <br />' Xylenes(total) ND 050 „ <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 2 0 <br /> Surrogate 4-BFB(FID) 752 100 75 60-140 <br />' Surrogate 4-BFB(FID) 7 52 100 75 60-140 <br /> Surrogate a a a-TFT(PID) 9 63 10 0 96 60-140 <br /> Surrogate a a a TFT(plD) 9 63 100 96 60-140 <br />' Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document finless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 12 of 16 <br />