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91 Striker Ave Ste 8 <br /> Sequoia Sacramento, <br /> (4 6)42199600 <br /> Analytical FAX cquoWabs.c oo <br /> www.sequoialabs.com <br /> Gettler-Ryan-Rancho Cordova Project: Former Unocal 0187,Stockton,CA S308456 <br /> 3140 Gold Camp Dr.,Ste. 170 Project Number: NIA Reported: <br /> Rancho Cordova CA,95670 Project Manager: Geoffrey D.Risse 09/08/03 15:29 <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(5308456-04)Water Sampled:08/22/03 07:58 Received:08/22/03 13:41 <br /> Purgeable Hydrocarbons 160 50 ug/1 1 3080298 08/25/03 08/25/03 EPA 8015/8021 <br /> Benzene 2.3 0.50 <br /> Toluene 2.4 0.50 " <br /> Ethylbenzene 2.5 0.50 " <br /> Xylenes(total) 4.9 0.50 " <br /> Methyl tert-butyl ether ND 2.0 " <br /> Surrogate:a,a,a-Triuorotoluene 111 % 60-140 " <br /> NP-1-65(5308456-05)Water Sampled:08/22/03 08:05 Received:08/22/03 13:41 <br /> Purgeable Hydrocarbons 1600 250 ug/1 5 3080298 08/25/03 08/25/03 EPA 8015/8021 <br /> Benzene 47 2.5 1. " " " " " <br /> Toluene 37 2.5 " " <br /> Ethylbenzene 1150 2.5 <br /> Xylenes(total) 200 2.5 <br /> ethyl tert-butyl ether ND 10 <br /> urrogate:a,a,a-Trifluorotoluene 73% 60-140 " <br /> NP-1-111(S308456-06)Water Sampled: 08/22/03 08:14 Received:08/22/03 13:41 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3080298 08/25/03 08/25/03 EPA 8015/802I <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-Triuorotoluene 96% 60-140 " <br /> Sequoia 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 4 of 9 <br /> i <br />