ENVIRONMENTAL - John Dixon & Associates

E NVIRONMENTALA SSESSMENT102803.12R-021.0516 . S I T E I N V E S T I G A T I O N A N D R E V I E W O FE N V I R O N M E N T A L C O N D I T I O N S6.1. ENVIRONMENTAL SETTING6.1.1. TopographyReview of the Englewood, Illinois Topographic Quadrangle, published by the United States GeologicalSurvey (USGS) and dated 1997 (photorevised in 1972), indicated the following: The Project has an average elevation of approximately 600 feet above mean sea level. Elevations do notvary significantly across the Project lands. Slope in the general area of the Project is to the north. The Project area is shaded to represent a high-density developed area and the exact site improvements arenot shown. The slope of the Project is estimated between approximately zero and two percent in a northerlydirection. The nearest surface water feature, South Fork of the Chicago River, is located approximately4,810 feet north of the Project.A copy of the topographic map is appended (Section 11).6.1.2. Soils/GeologyReview of the United States Department of Agriculture Soil Conservation Service Soil Survey GeographicDatabase (SSURGO) data, indicated the following: The urban land complex indicates that 100 percent of the predominant soil type has been disturbed andcovered with an impervious layer consisting of buildings, sidewalks, streets, and other structures.Review of the Geologic Map of Physiographic Provinces, published by the USGS and dated 1967, indicatedthe following: The Project is located within the Central Lowland physiographic province, which consists of dolostoneand limestone materials. The Project is further located over a Silurian-aged formation with an estimatedthickness of approximately 150 to 400 feet.Review of the Seismic Zone Map of the United States presented in 1994 by the Uniform Building CodeInternational Council of Building Officials indicated that the Project is located in: Zone 0 – Area of low probability of damaging ground motion.6.1.3. Groundwater HydrologyReview of the Water Resources Data Report for Illinois, published by the USGS and dated 1995, indicatedthe following: The Project is located within the Central Lowland aquifer formation with estimated groundwater levelsbetween 20 and 50 feet below ground surface (bgs).YOUR P ARTNER IN R EAL E STATE LIFECYCLE PLANNING & MANAGEMENT800.733.0660 • www.emgcorp.com14