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Table 1 Groundwater Analytical Results Tri Valley Growers-Plant T Thornton California TOC Depth to GW GW E TPH-g B T E X TPF!-d OZ :;I.:ID Date feet feet feet m 1L m /L m 1L m 1L m /L m IL) m /L MW-5 3124189 1061 885 6 1 76 <0 03 <0 0003 <0 0003 ea 0003 <0 0003 NT NT ' 9119189 965 096 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT I 1217189 968 093 02 <0 0003 <0 0003 <0 0003 <0 0003 NT NT, 3120190 872 a 1 89 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NTI 6/20/90 1038 023 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 9119/90 1242 -181 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 12120M 11 10 -049 <0 05 <0 0005 <0 0005 <0 0005 00008 NT NT 317191 857 204 <0 05 <0 0005 <0 0005 <0 0005 0 001 NT NT 6113191 1034 027 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT t 9112191 1260 -1 99 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 3112/92 705 356 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 9/4192 1327 5 -266 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 3125193 365 696 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 919193 896 165 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 319194 699 362 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 817197 1269 -208 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 7119199 925 1 36 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT ' MW-6 3124/89 1025 844 6 181 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 9119189 820 205 <0 03 000039 <0 0003 <0 0003 <0 0003 NT NT 1217189 918 107 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 3120/90 814 4 211 0 068 000063 <0 0003 <0 0003 <0 0003 NT NT 6120190 1022 003 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 9119190 1195 -1 70 <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 12/20/90 1067 -042 <0 05 <0 0005 00019 <0 0005 00052 NT NT 317191 770 255 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 6113191 1026 -001 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 9112/91 1202 -1 77 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 12/19/91 1024 001 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 3112192 634 391 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 618192 1020 005 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT ' 914192 1270 5 -245 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 12/16/92 887 138 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 3!25193 256 769 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 6128/93 692 333 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT ' 919193 870 155 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 1212193 767 258 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 319194 668 357 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 6121194 1010 015 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT ' 817/97 1219 -194 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 7119/99 925 100 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT MW-7 515199 not surveyed 679 062 00019 00015 00085 0 014 NT NT 6/8/99 720 016 <0 0005 <0 0005 000062 00022 NT NT ' 7/19199 890 <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT Ad Well 1/29188 NM <0 05 <0 0005 <0 0005 NT <0 0005 <0 05 NT ' LPW 3124189 NM <0 03 <0 0003 <0 0003 <0 0003 <0 0003 NT NT 919/93 NM <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT 7129/99 NM <0 05 <0 0005 <0 0005 <0 0005 <0 0005 NT NT Groundwater level measurements recorded at MW-4 during pump&treat operations,5/21/91 through 6121/94, ' do not represent groundwater ambient conditions S-Benzene T=Toluene E=Ethylbenzene X=Xylenes O&G a Oil and Gas TPHg-Total Petroleum Hydrocarbons as gasoline Ad} Well-Irrigation well northwest of Plant T TPHd=Total Petroleum Hydrocarbons as diesel LPW=Irrigation well northeast of Plant T (1)-Only MW-1 sampled Water mg/L-milligrams per liter (2)=Laboratory reported a non-gas mix(>C8) (INF)s MW-4 used as extraction well begmmg 5112194 e(6) -Measured on unbroken part of casing on south side #=Extraction system turned off In second quarter 1994 =Measured 3/13/90 c( )=Below laboratory reporting limit )=Measured 913192 NM=Not measuerd =Measured 3124/89 NT-Not Tested (7)=Measured 8119191 •=Resurveyed ' (8)=Measured 10/10/91 sac21 L/30000/CAOD/38737001 xls 3 of 3