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(`� 819 Striker Ave Ste 8 <br /> Sequoia Sacramento,916 CA 95834 <br /> -96M <br /> �l (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www.wquaialabs.com <br /> Gettler-Ryan-Dublin Project: Former Unocal 0187,Stockton,CA 5306048 <br /> 6747 Sierra Cowl,Ste.] 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 //nits Dilution Batch Prepared Analyzed Method Notes <br /> U-15 5306048-1 Water Sampled:05/30/03 12:30 Received:06/02/03 33:40 <br /> Purgeable Hydrocarbons ND 50 ug/l 1 3060103 06/06/03 06/06/03 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 92% 60-140 <br /> U-16 5306048-17 Water Sampled:05/2810313:55 Received:06102/0313:40 <br /> Purgeable Hydrocarbons 79 50 ug/1 1 3060103 06/06/03 06/06/03 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-Trifluorololuene 94% 60-140 " <br /> U-17 5306048-18 Water Sampled-0512810314:35 Received:06102/0313:40 <br /> Purgeable Hydrocarbons ND 50 ug/l 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) ND 0.50 " <br /> Methyl tert-butyl ether ND 2.0 <br /> Surrogate:a,a,a-Trifluorotoluene 103% 60-140 <br /> Sequoia Analytical- Sacramento The results in this report apply to the samples analyzed in accordance with the chain <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 9 of 32 <br />