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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C2 958-34 <br /> 9600 <br /> ' (916)921-9600 <br /> FAX(916)921-0100 <br /> Analytical www sequotalabs com <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187, Stockton,CA 5207242 <br /> 3140 Gold Camp Dr,Ste 170 Project dumber 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 Result Limit Units Dilution Hatch Prepared Analyzed Method Notes <br /> NP-1-111 (5207242-04)Water Sampled 07/19/02 08 20 Received 07/19/02 14 14 <br /> Purgeable Hydrocarbons ND 50 ug/I 1 2070227 07/23/02 07/23/02 DHS LUFT <br /> Benzene ND 050 <br /> Toluene ND 050 <br /> Ethylbenzene ND 050 C-07 <br /> Xylenes(total) ND 050 H " <br /> Methyl tert-butyl ether ND 25 " <br /> Surrogate a,a a-Trtfluorotoluene <br /> 96% 60-140 " <br /> NP-2-22(S207242-05)Water Sampled 07/19/02 07 09 Received 07/19/02 14 14 <br /> Purgeabte Hydrocarbons 52 50 ug/l 1 2070254 07/24/02 07/24/02 DHS LUFT <br /> C-07 <br /> Benzene 11 0 50 <br /> Toluene ND 050 " <br /> Ethylbenzene ND <br /> 050 <br /> nes(total} C_07 <br /> yl tert-butyl ether 6 0 2 5 <br /> Surrogate a,a a-Trifluorotoluerie 105% 60-140 ' <br /> NP-2-60(5207242-06)Water Sampled 07/19/02 07 20 Received 07/19/02 14 14 <br /> Purgeable Hydrocarbons 8600 5000 ugA 100 2070270 07/26/02 07/26/02 DHS LUFT HC-12 <br /> Benzene 3300 50 „ <br /> Toluene 230 50 <br /> 50 " <br /> Ethylbenzene 220 „ <br /> 50 " <br /> Xylenes(total) 180 <br /> _Methyl tert-butyl ether 430 250 " <br /> Surrogate a,a,a-Trtfluorotoluene <br /> 103% 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 ms analytical report must be reproduced in its entirety <br /> Page 4 of 10 <br />