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I I I I I I I I I I I I I I I I I I I Project No. CMJX-91-0100 Ramsey County Public Health Department May 2. 1991 Page 2 including surficial geology, approximate depth to bedrock, bedrock geology, and general groundwater flow direction in the viciIÚty of the SITE is reviewed if available. The surficial geology in the viciIÚty of the SITE consists of Des Moines Lobe outwash deposits. These deposits are sand, silty sand, and gravel and are overlain by silt and clay loam deposits (Meyer, 1986). Depth to bedrock in the vicinity of the SITE is approximately 100 feet below land surface. The uppermost bedrock unit in the vicinity of the SITE is the Decorah Shale,· and the Platteville and Glenwood Formations (Jirsa, Olsen and Bloomgren, 1985). According to a Minnesota Geological Survey (MGS) official, the general groundwater flow direction witilln the surficial deposits in the vicinity of the SITE is northeast toward McCarrons Lake. The depth to groundwater in the vicinity of the SITE is approximately 40 to 60 feet. The SITE specific groundwater flow direction was not determined during the current investigation. Additional field investigation, beyond the scope of services, would be required to determine tills information. c. Land Use History Information regarding past and present land use activities at the SITE was obtained from: Sanborn Fire Insurance Company Atlases; Aerial photographs; the Minnesota Geological Survey; the Minnesota Pollution Control Agency; Ramsey County Public Health Department; the City of Roseville;