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Figure 4-1 <br /> Trends of Benzene and Total Petroleum Hydrocarbons as Gasoline (TPH-g) Concentrations in Source Wells MW-2 and MW-2A <br /> San Joaquin County Human Services Agency Building <br /> Stockton, California <br /> 30,000 8,000 <br /> d 25,000 _._ 7,000 <br /> c i 6,000 y <br /> N c 20,000 <br /> c o 5,000 d o =MW 2 <br /> m � 15,000 4,000 m .W ` <br /> 3 m 10.000 _- --. - ----- 3,000 n m MW-2A <br /> U 2,000 3 g <br /> U 5,000 1,000 �j <br /> 0 0 <br /> 8/11/1987 5/7/1990 1/31/1993 10/28/1995 7/24/1998 4/19/2001 1/14/2004 10/10/2006 <br /> Daft <br /> 90,000 <br /> 80,000 <br /> 3 70,000 <br /> 60,000 <br /> c 50,000 =MW-2 <br /> 40,000 MW <br /> V 30,000 — <br /> q) 20,000 - <br /> F 10,000 <br /> 0 <br /> 8/11/1987 5!1/1990 1/31/1993 10/28/1995 7/24/1998 4/19/2001 1/14/2004 10/10/2006 <br /> Data <br />