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GEOCHECK�- PHYSICAL SETTING SOURCE ADDENDUM <br /> TARGET PROPERTY ADDRESS <br /> JAMES M. FRITTS <br /> 10055 E. UNDERWOOD ROAD <br /> ACAMPO,CA 95220 <br /> TARGET PROPERTY COORDINATES <br /> Latitude(North): 38.211800-38' 12'42.5" <br /> Longitude(West): 121.194199- 121' 11'39.1 <br /> Universal Tranverse Mercator: Zone 10 <br /> UTM X(Meters): 658097.5 <br /> UTM Y(Meters): 4230650.5 <br /> Elevation: 92 ft.above sea level <br /> EDR's GeoCheck Physical Setting Source Addendum has been developed to assist the environmental professional <br /> with the collection of physical setting source information in accordance with ASTM 1527-00,Section 7.2.3. <br /> Section 7.2.3 requires that a current USGS 7.5 Minute Topographic Map(or equivalent,such as the USGS Digital <br /> Elevation Model)be reviewed. It also requires that one or more additional physical setting sources be sought <br /> when(1)conditions have been identified in which hazardous substances or petroleum products are likely <br /> to migrate to or from the property,and(2)more information than is provided in the current USGS 7.5 Minute <br /> Topographic Map(or equivalent) is generally obtained,pursuant to local good commercial or customary practice, <br /> ` to assess the impact of migration of recognized environmental conditions in connection with the property. Such <br /> additional physical setting sources generally include information about the topographic, hydrologic, hydrogeologic, <br /> and geologic characteristics of a site,and wells in the area. <br /> Assessment of the impact of contaminant migration generally has two principle investigative components: <br /> r. <br /> 1.Groundwater flow direction,and <br /> 2.Groundwater flow velocity. <br /> Groundwater flow direction may be impacted by surface topography, hydrology, hydrogeology, characteristics <br /> of the soil,and nearby wells.Groundwater flow velocity is generally impacted by the nature of the geologic strata. <br /> EDR's GeoCheck Physical Setting Source Addendum is provided to assist the environmental professional in <br /> forming an opinion about the impact of potential contaminant migration. <br /> V <br /> V <br /> L <br /> L / <br /> v <br /> TC01538094.6r Page A-1 <br /> it <br />