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City of Roseville Project No. CMXX-99-0290 June 3, 1999 Page 4 The uppermost bedrock unit in the vicinity of the Site is the Middle Ordovician, Platteville and Glenwood Formations (MossIer and Bloomgren, 1992). The Platteville Formation is described as fine-grained dolostone and limestone underlain by thin, green, sandy shale (3 to 5.5 feet thick) of the Glenwood Formation. The depth to bedrock in the vicinity of the Site is approximately 150 feet below land surface (MossIer and Cleland, 1992). According to published geologic information, the regional groundwater flow direction within the unconsolidated deposits in the vicinity of the Site is generally southeast (Kanivetsky and Cleland, 1992a). The general groundwater flow direction within the uppermost bedrock aquifer in the vicinity of the Site, the Prairie du Chien-Jordan Aquifer, is likely south-southeast toward the Mississippi River (Kanivetsky and Cleland, I 992b). The Site-specific groundwater flow direction was not determined through direct measurement during this Phase I ESA. Additional field investigation, beyond the Scope of Services of this Phase I ESA, would be required to determine this information. C.2. Regulatory Information Braun Intertec obtained regulatory information pertaining to the Site and surrounding area from VISTA Information Solutions, Inc. (VISTA). The VISTA regulatory information report is a compilation and summary of current federal and state regulatory lists and databases and is attached in Appendix C. The objective of the regulatory information review is to evaluate whether the Site or nearby properties are listed as having a past or present record of actual or potential environmental hazards that are under investigation or may have an adverse impact on the Site. c'2.a. Federal Database Records The VISTA report included a compilation of the following United States Environmental Protection Agency (USEP A) databases and lists of verified and potential hazardous-waste problem facilities located at, adjacent to, or within ASTM Standard Search Distances from the Site: . NPL - USEP A National Priorities List. The NPL is the USEP A's national listing of uncontrolled or abandoned hazardous waste facilities identified for priority remedial actions under the Superfund Program. . CORRACTS - USEP A RCRA Corrective Action Report. CORRACTS identifies hazardous waste handlers with RCRA corrective action activity.