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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento CA 95834 <br /> (91b)921-9600 <br /> 4 ID FAX(916)921-0100 <br /> I Analytical www sequotalabs com <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187,Stockton,CA S207242 <br /> 3140 Gold Camp Dr,Ste 170 ProjectNumber N/A Reported <br /> Rancho Cordova CA,95670 Project Manager David Herzog 07/30/02 16 41 <br /> Total Purgeable Hydrocarbon, BTEX and MTBE by DHS LUFT <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte <br /> Result limit units Dilution Batch Prepared Analyzed Method Notes <br /> U-3 (5207242-01)Water Sampled 07/19/02 08 30 Received 07/19/02 14 14 <br /> Purgeable Hydrocarbons 590 50 ug/l 1 2070254 07/24/02 07/24/02 DHS LUFT HC-12 <br /> Benzene 6 0 050 " <br /> Toluene 18 050 " <br /> Ethylbenzene <br /> 63 050 " <br /> Xylenes(total) 5 2 050 <br /> Methyl tert-butyl ether ND 2 5 <br /> Surrogate a,a,a-Trifluorotoluene <br /> 104% 60-140 " <br /> NP-1-22(5207242-02)Water Sampled 07/19/02 07 57 Received 07/19/02 14 14 <br /> Purgeable Hydrocarbons 370 50 ugn 1 2070256 07/25/02 07/25/02 DHS LUFT A-01,HC-12 <br /> Benzene 83 050 A-01 <br /> Toluene 41 050 A-01 <br /> Ethylbenzene 3 4 050 " „ „ „ A-01 <br /> �nes(total) 44 050 A-01 <br /> tyl tert-butyl ether 12 25 S-01-02 <br /> Surrogate a,a,a-Trifluorotoluene 286% 60-140 5 <br /> NP-1-65(5207242-03)Water Sampled 07/19/02 08 10 Received 07/19/02 14 14 <br /> Purgeable Hydrocarbons 4700 2000 ug/l 40 2070227 07/23/02 07/23/02 DHS LUFT <br /> 20 " <br /> Benzene 140 „ <br /> Toluene 730 20 " <br /> Ethylbenzene 300 20 <br /> 20 " <br /> Xylenes(total) 670 � <br /> Methyl tert-butyl ether ND 100 " <br /> Surrogate a,a,a-Triuorotoluene 105% 60-140 " <br /> uoia Analytical-Sacramento 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 to its entirety <br /> Page 3 of 10 <br />