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r_ <br />PHYSICAL SETTING SOURCE RECORDS SEARCHED <br />` TOPOGRAPHIC INFORMATION <br />USGS 7.5' Digital Elevation Model (DEM) <br />Source: United States Geologic Survey <br />` EDR acquired the USGS 7.5' Digital Elevation Model in 2002. 7.5 -Minute DEMs correspond to the USGS <br />1:24,000- and 1:25,000 -scale topographic quadrangle maps. <br />HYDROLOGIC INFORMATION <br />r <br />Flood Zone Data: This data, available in select counties across the country, was obtained by EDR in 1999 from the Federal <br />Emergency Management Agency (FEMA). Data depicts 100 -year and 500 -year flood zones as defined by FEMA. <br />NWI: National Wetlands Inventory. This data, available in select counties across the country, was obtained by EDR <br />in 2002 from the U.S. Fish and Wildlife Service. <br />HYDROGEOLOGIC INFORMATION <br />AOUIFLOW Information System <br />Source: EDR proprietary database of groundwater flow information <br />EDR has developed the AOUIFLOW Information System (AIS) to provide data on the general direction of groundwater <br />flow at specific points. EDR has reviewed reports submitted to regulatory authorities at select sites and has <br />extracted the date of the report, hydrogeologically determined groundwater flow direction and depth to water table <br />information. <br />Geologic Age and Rock Stratigraphic Unit <br />Source: P.G. Schruben, R.E. Arndt and W.J. Bawiec, Geology of the Conterminous U.S. at 1:2,500,000 Scale - A digital <br />representation of the 1974 P.B. King and H.M. Beikman Map, USGS Digital Data Series DDS - 11 (1994). <br />STATSGO: State Soil Geographic Database <br />Source: Department of Agriculture, Natural Resources Conservation Services <br />The U.S. Department of Agriculture's (USDA) Natural Resources Conservation Service (NRCS) leads the national <br />Conservation Soil Survey (NCSS) and is responsible for collecting, storing, maintaining and distributing soil <br />survey information for privately owned lands in the United States. A soil map in a soil survey is a representation <br />of soil patterns in a landscape. Soil maps for STATSGO are compiled by generalizing more detailed (SSURGO) <br />soil survey maps. <br />ADDITIONAL ENVIRONMENTAL RECORD SOURCES <br />FEDERAL WATER WELLS <br />PWS: Public Water Systems <br />Source: EPA/Office of Drinking Water <br />Telephone: 202-564-3750 <br />Public Water System data from the Federal Reporting Data System. A PWS is any water system which provides water to at <br />least 25 people for at least 60 days annually. PW Ss provide water from wells, rivers and other sources. <br />PWS ENF: Public Water Systems Violation and Enforcement Data <br />Source: EPA/Office of Drinking Water <br />Telephone: 202-564-3750 <br />Violation and Enforcement data for Public Water Systems from the Safe Drinking Water Information System (SDWIS) after <br />August 1995. Prior to August 1995, the data came from the Federal Reporting Data System (FRDS). <br />USGS Water Wells: USGS National Water Inventory System (NWIS) <br />This database contains descriptive information on sites where the USGS collects or has collected data on surface <br />water and/or groundwater. The groundwater data includes information on wells, springs, and other sources of groundwater. <br />TC01439514.2r Page A-18 <br />