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Several researchers reported that salinities for the lower Potomac aquifer interval of eastern New Jersey, Delaware, and Maryland (Manheim and Horn, 1968; Hansen, 1984; Trapp and others, 1984; Meisler, 1989; Trapp and Horn, 1997; Pope and Gordon, 1999). We combined information presented by Hansen (1984) and Pope and Gordon (1999) for the GIS.<\/SPAN><\/SPAN><\/P><\/DIV>", "geometryType": "esriGeometryPoint", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "Hansen, H. J., 1984, Hydrogeologic characteristics of the Waste Gate Formation, a new subsurface unit of the Potomac Group underlying the eastern Delmarva Peninsula: Maryland Geological Survey Information Circular 39, 22 p.\n*\nPope, D. A., and Gordon, A. 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