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1551 lndustnal Road <br /> } Sequoia San Carlos CA 94070 <br /> (650)232-9600 <br /> FAX Analytical wwOq(650)232-9612612 <br /> www scgan�alabs oom <br /> G -Ryan/Geostrategies(1) Project Tosco(1) <br /> 67 ria Court,Suite 1 Project Number Former Unocal SS#4409,Stockton,CA Reported <br /> Dub in CA,94568 Project Manager Deanna Harding 10/26/01 09 39 <br /> Total Purgeable Hydrocarbon (C6-C12) by EPA 8015M and BTEX/MTBE 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 1100094-EPA 5030B <br /> Blank(1100094-BLKI) Prepared&Analyzed 10/22/01 <br /> Purgeable Hydrocarbons as Gasoline ND 50 ugli <br /> Benzene ND 050 " <br /> rolue„o ND 050 " <br /> F.thylbenzene ND 050 " <br /> MOM(tow) ND 050 " <br /> Methyl tert-butyl other ND so " <br /> Rarogate a,a,a-Trtuarotoluene 108 100 108 70-130 <br /> LAM(1100094-BS1) _ Prepared&Analyzed 10/22/01 <br /> Benzene 10 4 050 ug11 100 104 70-130 <br /> Toluene 10 5 0 50 100 105 70-130 <br /> Ethylbenzeme 10 6 050 100 106 70-130 <br /> Xylenes(tow) 322 050 30 0 107 70-130 <br /> �* a,a-Trpluorotoluene 957 100 95 7 70-130 <br /> 010-094-BS2 Prepared&Analyzed 10/22/01 <br /> Purgeable Hydrocarbons as Gasoline 235 50 ugll 250 940 70-130 <br /> Surrogate &,a,a-Tr/Jluorotoluene ]/1 11100 111 70-130 <br /> Matrix Spike(1100094-MS1) Source L110070-04 Prepared&Analyzed 10/22/01 <br /> Baum a 109 050 ug11 100 ND 109 60-140 <br /> Toluene: 108 050 100 ND 108 60-140 <br /> Ethylbenzene 117 030 100 ND 117 60-140 <br /> Xylenes(total) 33 5 050 300 ND 112 60-140 <br /> Surrogate a,a,a-Try7uorotoluene 10 7 100 107 70-130 <br /> Metrix Spike Dup(1100094-MSDI) Source.L110070-04 Prepared&Analyzed 10/22/01 <br /> Benz= 113 050 ugll 100 ND 113 60-140 360 25 <br /> Toluene 114 050 100 ND 114 60-140 541 25 <br /> Ethyibenzene 122 050 100 ND 122 60-140 4 18 25 <br /> Xylenes(total) 361 050 300 ND 120 60-140 747 25 <br /> Swrogate a,a,a-Tri luorotoluene 102 +' 100 102 70-130 <br /> SegWalytical-San Carlos The results in this report apply to the samples analysed in accordance with the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 16 <br /> i <br />