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819 Strilca Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> ' - (916)921-9100 <br /> Analytical <br /> FAX(916)921-0100 <br /> www sequotalabs com <br /> ' <br /> Geological Technics,hntcs,Inc Project Montan Bros 5504379 <br /> 1101 7th Street Project Number 724 2 Reported <br /> ' Modesto CA,95354 Project Manager Mandeep Singh 05/05/05 10 29 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> ' Sequoia Analytical- Sacramento <br /> P—p—g <br /> Analyte Result L imt Units Dilution Batch Prepared Analyzed Method Not <br /> ' MW-106(5504379-04)Water Sampled 04/18/0513 00 Received 04/18/05 18 00 <br /> Gasoline Range Organics(C4-C12) 170 50 ug/l 1 5040250 04/20/05 04/20/05 EPA <br /> 8015B/8021B <br /> Benzene 21 050 " <br /> Toluene ND 050 <br /> Elhylbenzene ND 050 " <br /> Xylenes(total) ND 050 <br /> ' Methyl tert-butyl ether 19 20 1. n " I, <br /> Surrogate 4-BFB(FID) 108% 60-140 " <br /> Surrogate a a,a-TFT(PID) 82% 60-140 <br /> ' MW-107(5504379-05)Water Sampled 04/18/05 09 45 Received 04/18/05 18 00 <br /> Gasoline Range Organics(C4-02) 87 50 ug/l 1 5040250 04/20/05 04/20/05 EPA <br /> 8015B/8021B <br /> Benzene ND 050 " <br /> Wylu <br /> ene ND 050ylbenzene ND 050 <br /> enes(total) ND 050 " <br /> Methyl tert-butyl ether 32 20 " <br /> ' Surrogate 4-BFB(FID) 111% 60-140 <br /> Surrogate a a a-TFT(PID) 87% 60-140 <br /> MW-108(S504379-06)Water Sampled 04/18/05 14 09 Received 04/18/05 18 00 <br /> ' Gasoline Range Organics(C4-C12) 80 50 ug/l 1 5040250 04/20/05 04/20/05 EPA <br /> 8015B/8021B <br /> Benzene 11 0 50 " <br /> Toluene ND 050 " <br /> ' Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 0 50 <br /> Methyl tert-butyl ether ND 20 <br /> ' Surrogate 4-BFB(FID) 108% 60-140 H I, <br /> Surrogate a a a-TFT(PID) 82% 60-140 " <br /> ' Sequoia Analytical-Sacramento The results an this report apply to the samples analyzed in accordance with the chain of <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 4 of 10 <br />