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Figure 6 <br /> MtBE Concentrations Versus Time with Trend Analysis <br /> Groundwater Monitoring Wells MW-3 and MW-4 <br /> Chevron Service Station 9-8264 <br /> 3775 Tracy Boulevard <br /> Tracy, California <br /> 1,000,000 <br /> Note Trend analysis preformed utilizing exponential <br /> regression with a logarithmic scale <br /> 100,000 - <br /> 10,000 <br /> pn� <br /> Ffl <br /> 0 <br /> R 1,000 <br /> d <br /> c � <br /> 0 100 <br /> 10 <br /> 1 <br /> sap 0�3 RFS OFA ooh <br /> NO ��� ��� ��� 41 NO <br /> Date <br /> —a—MtBE (MW-3) —d---MtBE (MW-4) Trendline (MW-3) Trendline(MW-4) <br />