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]IndustrialRoad <br /> Sequoia San Carlos CA 94070 <br /> a_ _1 (650)232-9600 <br /> 1111111WA (650)232-9612nalyticl <br /> www.sequoialabs.com <br /> i;=e_:. fir-Ryan/Geostrategies(I} Project; Tosco(1) <br /> 6747 Sierra Court, Suite 3 Project Number; UNOCAL SSR 11195,LATHROP,CA Reporled: <br /> Dublin CA,94568 Project Manager: Deanna Harding 08/28/0107.22 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEXIMTBE by EPA 8021B - Quality Control <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 1080099-EPA 5030B(PIT) <br /> Blank(1080099-BLKI) Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/l <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl terl-butyl ether ND 5.0 " <br /> Surrogate:a,a,a-Tris luorotoluene 9.96 10.0 99.6 70-130 <br /> LCS(1080099-BSI) Prepared&Analyzed:08/23/0) <br /> Benzene 9.94 0.50 ug/I 10.0 99.4 70-130 <br /> Toluene 9.77 0.50 10,0 97.7 70-130 <br /> Ethylbenzene 9.88 0.50 10.0 98.8 70-130 <br /> (total) 30.5 0.50 30.0 102 70-130 <br /> S:f�; are:a,a,a-Truarotoluene 10.3 10.0 103 70-130 <br /> LCS()080099-BS2) Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 268 50 ugA 250 107 70-130 <br /> Surrogate:a,a,a-Triuorotoluene 11.3 " 10.0 113 70-130 <br /> Matrix Spike(1080099-A7S1) Source: L108064-05 Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 236 50 ugJi 250 ND 94.4 60-140 <br /> Surrogate:a,a,a-Triuorotoluene 10.4 " 10.0 104 70-130 <br /> Matrix Spike Dup(1080099-A75DI) Source: L108064-05 Prepared&Analyzed:08/23/01 <br /> Purgeable Hydrocarbons as Gasoline 280 50 ug/1 250 ND 112 60-140 17.1 25 <br /> Surrogate:a,a,a-Tris luorotoluene 11.4 10.0 114 70-130 <br /> Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> Page l l of 22 <br />