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, o <br /> r <br /> Figure 1: Contaminant Concentration and Water Level Trends {ATR-8} <br /> a <br /> Arca Service Station No. 2093 <br /> 3425 Tracy Boulevard, Tracy, California z <br /> r <br /> ro <br /> ,aao <br /> v pp <br /> 45.0 <br /> —F TPHg �d <br /> *—GW Elevation 40.0 w <br /> I O,Oaa <br /> m <br /> 35.0 'c <br /> 1,000 30.0 .� <br /> CL <br /> IM <br /> _Q 25.0 v, <br /> 10D c <br /> 0 <br /> C 20.0 LU <br /> � m <br /> is <br /> 15.0 c <br /> 3 <br /> G <br /> 10.0 ti <br /> 1 <br /> 5,0 <br /> 0 <br /> 0.0 <br /> Aug-91 Jan-93 Wy-94 Oct-95 Feb-97 Jun-98 NOV-99 Mar-01 Aug-02 Dec-03 <br /> Date <br /> Note: Contaminant concentrations reported as non-detect(ND)are shown as zero on this <br /> graph. <br /> o <br />