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ker Avenue,Suite 8 <br /> Sequoia Sl9Sacramento,CA 95834 <br /> (916)921-9600 <br /> ' Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> iURS-Sac Gateway Oaks Project ARCO 2093,Tracy,CA <br /> 2870 Gateway Oaks Dr, Ste 300 Pmlect Number 2093,Tracy,CA Reported <br /> Sacramento CA,95833 P"ect Manager Vernon Elatth 07/16/02 17 03 <br /> Total Purgeable Hydrocarbons and BTEX by DHS LUFT <br /> Sequoia Analytical-Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> ATR-8 5207012-05Water Sampled 06/28/02 09 40 Received 07/01/02 08 00 <br /> Purgeable Hydrocarbons 260 50 ue 1 2070120 07/11/02 07/12/02 DHS LUFT HC-12 <br /> Benzene 079 050 " " " <br /> D-l0 <br /> Toluene 056 050 0-10 <br /> Ethylbenzene 27 050 0-10 <br /> Xylenes(total) ND 050 " " " 0-10 <br /> Surrozate a a a-Tri luorotoluene 90% 60-140 <br /> ATR-12 C$207012-06j Water Sampled 06/28/02 08 20 Received 07/01/02 08 00 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 2070115 07/10/02 07/12/02 DHS LUFT <br /> Benzene ND 0 50 07/11/02 " <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Surrogate a a a-Trifluorotoluene 91 % 60-140 <br /> s <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document This analytical report must be reproduced in its entirety <br /> Page Page 3 of l 1 <br />