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819 Striker Ave Ste 8 <br /> Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> Analytical FAX(9 -0100 <br /> www.sequoialauoialabs.com <br /> �r-Ryan-Dublin Project: Former Unocal 0187,Stockton,CA S306048 <br /> 67 7 Sierra Court,Ste.3 Project Number: NIA Reported: <br /> Dublin CA,94568 Project Manager. Deanna L.Harding 06/16/03 15:43 <br /> Gasoline (2-Methylpentane to 1,2,4-Trimethylbenzene) and BTEX by EPA 8015M and 8021B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> NP-1-22 (S306048-28)Water Sampled:05130.103 13:00 Received: 06/02/0313:40 <br /> Purgeable Hydrocarbons ND 50 ugA 1 3060103 06/09/03 06/09/03 EPA 8015/8021 <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) 1.2 0.50 <br /> Methyl tert-butyl ether ND 2.0 <br /> Surrogate:a,a,a-Trifluorotoluene 89% 60-140 " <br /> NP-1-65 (5306048-29)Water Sampled:05130/0314:00 Received:06/02/03 13:40 <br /> Purgeable Hydrocarbons 3100 100 u811 2 3060103 06/09/03 06/10/03 EPA 8015/8021 <br /> Benzene 98 1.0 " <br /> Toluene 110 1.0 " <br /> Ethylbenzene 560 100 " 200 " 06/09/03 " <br /> Xylenes(total) 750 1.0 2 06/10/03 " <br /> Methyl tert-butyl ether 18 4.0 " <br /> ate:a,a,a-7`rifluorotoluene 113% 60-140 " <br /> IVP-1-111 ($306048-30)Water Sampled:05/30/03 15:00 Received:06/02/03 13:40 <br /> Purgeable Hydrocarbons ND 50 ug/1 1 3060103 06/10/03 06/10/03 EPA 8015/8021 <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 2.0 " <br /> Surrogate:a,a,a-Trifluorotoluene 88% 60-140 " <br /> is Analytical - Sacramento The results in 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 13 of 32 <br />