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f O <br /> r <br /> Figure 3: Contaminant Concentration and Water Level Trends (ATR-8) <br /> Arco Service Station No. 2093 <br /> 3425 Tracy Boulevard, Tracy, California z <br /> r <br /> CA <br /> ro <br /> 300,000 45,0 °D <br /> —� <br /> ME <br /> 9 GW Elevation CO <br /> 10,000 � <br /> v <br /> 35.0 <br /> CZ <br /> 1,000 F. <br /> 30.0 g <br /> C <br /> CL 740 - <br /> e <br /> 0 25.0 <br /> 100 e <br /> `c re <br /> 20.0 w <br /> m <br /> 10 t5.0 �°c <br /> 0 <br /> l7 <br /> i0.0 <br /> 5.0 <br /> 0 0.0 <br /> Aug-91 Jan-93 May-94 Oat-95 Feb-97 Jun-98 Nov 99 Mar-01 Aug-02 Dec-03 <br /> Date <br /> Note: Contaminant concentrations reported as non-detect(MD)are shown as zero on this <br /> graph. <br /> 0 <br /> 0 <br />