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Table 3. Analytical Results <br /> li p ARCO Station 434, LcKli, California � . <br /> i , <br /> Monitoring well <br /> number <br /> Ca centrations in u2/l <br /> and date sam led I Benzene Toluene 71400 <br /> benzene X Ienes TPH-G{a) <br /> W-1 <br /> 4/10/87 �� 120 <!.0 1.0 <br /> 7123187 <I.0 120000 <br /> 180 200 2.5 190 <900 <br /> 11/13/87 <br /> 115189 ; 1604 2300 6900 147200 <br /> 3680 740 30 22804/10/89 i 2920 1050 50 2830 <br /> 7/11/89 1140 310 16 685 <br /> 10189 _ _ - <br /> - _ f <br /> Destroyed 5190 - <br /> W-1A <br /> 4/23/90 <br /> 490 81 4.I 540 <br /> 10/02/90 27 6 <br /> <0.5 gF200 <br /> 2/1/91 100 24 3.4 <br /> 4118/91 507/24/91 110 5.8 <0.5 6.375 5.5 <0.5 4.610/23/9/ 20 <0.5 <0.5 - <0.5 <br /> 2/1I/92 18 <! <br /> <I <1 <br /> 5/12192 430 <br /> 5.6 <0.5 <0.5 <br /> $/18/92 6.5 <0.5 <0.S 220 � <br /> 11/17/92 <0.5 <0.5 <0.5 <0.5 <50 �! <br /> 2123193 <0.5 <0.5 <0.5 <0,5 <50 <br /> 5126/93 <0.5 <0.5 <0.5 <0.5 <50 <br /> 8/23/93 <0.5 <0.5 <br /> <0.5 <0.5 <50 <br /> 11/17/93 <0.5 <0.5 <0.5 <0.5 <50 <br /> 3/22/94 <0.3 <0.3 <0.3 <0.5 <br /> 6123/94 <10 � <br /> <0.3 <0.3 <0.3 <0.5 <10 <br /> W-2 <br /> 4/I0187IIT <br /> 00 680 5500 64000 <br /> 7/23/8700 2300 16000 281700 <br /> 11/13/8700 5600 13000 343900 <br /> 6/24188 755 3000 <br /> 10/3/880 110 410 <br /> 116/$940 510 2740 <br /> 416/89 0 450 2620 <br /> 7/11/89 2090 1500 200 1150 <br /> 1018//89 496 206 87 219 <br /> 122/90 3600 4500 470 5000 18000 <br /> 5/9/90 <br /> i 4900 4000 350 5000 _ <br /> 10/2/90 2800 2300 260 2900 <br /> 2/1/91 2600 1400 I50 1600 <br /> 4/16/9I 1,4300 2200 ; <br /> 110 1700 16000 I <br /> 7/24/91 4900 740 110 1300 16000 �F# <br /> 10/23/91 440 120 64 410 4000 <br /> 2/10/92 _ <br /> 5/12/92(b) <br />