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'_GEOCHECK®„ PHYSICAL SETTING SOURCE ADDENDUM, f TARGET PROPERTY ADDRESS ' 1605 S EL DORADO STREET 1605 S EL DORADO STREET STOCKTON,CA 95206 ' TARGET PROPERTY COORDINATES Latitude(North) 37 936409-37'56' 11 1" Longitude(West) '121 284531 -121 17'4 3" Universal Tranverse Mercator Zone 10 UTM X(Meters) 650752 9 UTM Y(Meters) 41999420 ' EDR's GeoCheck Physical Setting Source Addendum has been developed to assist the environmental professional with the collection of physical setting source information in accordance with ASTM 1527-00,Section 7 2 3 Section 7 2 3 requires that a current USGS 7 5 Minute Topographic Map(or equivalent,such as the USGS Digital Elevation Model)be reviewed It also requires that one or more additional physical setting sources be sought when(1)conditions have been identified in which hazardous substances or petroleum products are likely to migrate to or from the property,and(2)more information than is provided in the current USGS 7 5 Minute Topographic Map(or equivalent)is generally obtained,pursuant to local good commercial or customary practice, ' to assess the impact of migration of recognized environmental conditions in connection with the property Such additional physical setting sources generally include information about the topographic,hydrologic,hydrogeologic, and geologic charactenstics of a site,and wells in the area Assessment of the impact of contaminant migration generally has two principle investigative components 1 Groundwater flow direction,and 2 Groundwater flow velocity ' Groundwater flow direction may be impacted by surface topography, hydrology, hydrogeology, characteristics of the soil,and nearby wells Groundwater flow velocity is generally impacted by the nature of the geologic strata EDR's GeoCheck Physical Setting Source Addendum is provided to assist the environmental professional in forming an opinion about the impact of potential contaminant migration TC514466 2s Page A-1 1