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Road <br /> Sequoia an C Carlos <br /> A 94070 <br /> San Carlos 23 -9600 <br /> (650)232-9600 <br /> Analytical ww.seAX 50) labs.c m <br /> www.sequoialabs.com <br /> Project: ` <br /> Gettler-RyanlGeostrategies(1) Pro j Tosco(]) <br /> 6747 Sierra Court,Suite 3 Project Number: UNOCAL SS#11195,LATHROP,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 08/28/01 07:22 <br /> Tolal Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/114TBE by EPA 8021B - Quality Conlrol <br /> Sequoia Analytical - San Carlos <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Balch 1080107-EPA 5030B(PIT) <br /> Blank(1080107-BLKI) Prepared&Analyzed:08/24/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ug/I <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Methyl tert-butyl ether ND 5.0 " <br /> Surrogate:a,a,o-Trifluorololuene 11.2 10.0 112 70-130 <br /> LCS(1080107-BS1) Prepared&Analyzed:08/24/01 <br /> Benzene 10.5 0.50 ugA 10.0 105 70-130 <br /> Toluene 10.6 0.50 10.0 106 70-130 <br /> Ethylbenzene 10.6 0.50 10.0 106 70-130 <br /> Xylenes(total) 31.9 0.50 30.0 106 70-130 <br /> Surrogate:a,a,a-Triiuorotoluene 10.6 10.0 106 70-130 <br /> LCS(1080107-BS2) Prepared&Analyzed:08/24/01 <br /> Purgeable Hydrocarbons as Gasoline 231 50 ug/I 250 92.4 70-130 <br /> Surrogate:a,o,a-Triuorololuene 11.6 " 10.0 126 70-130 <br /> Matrix Spike(1080107-MSI) Source:L108077-05 Prepared:08/24/01 Analyzed: 08/25/01 <br /> Benzene 10.3 0.50 ugll 10.0 ND 103 60-140 <br /> Toluene 10.5 0.50 10.0 ND 105 60-140 <br /> Ethylbenzene 10.7 0.50 10.0 ND 107 60-140 <br /> Xylenes(total) 31.8 0.50 30.0 ND 106 60-140 <br /> Surrogate:a,o,o-Trifluorololuene 11.0 10.0 110 70-130 <br /> Matrix Spike Dup(1080107-1%7SD1) Source: L108077-05 Prepared:08/24/01 Analyzed:08/25/01 <br /> Benzene 10.4 0.50 ugA 10.0 ND 104 60-140 0.966 25 <br /> Toluene 10.5 0.50 10.0 ND 105 60-140 0.00 25 <br /> Ethylbenzene 10.7 0.50 10.0 ND 107 60-140 0.00 25 <br /> Xylenes(total) 32.0 0.50 30.0 ND 107 60-140 0.627 25 <br /> Surrogate:a,a,a-Triuorotoluene 10.3 10.0 103 70-130 <br /> Sequoia 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 14 of 22 <br /> i <br />