Phase I/Environmental Site Assessment

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Phase I Ena�ironmental Site Assessment September 2, 2009 4.0 RECORDS REVIEW The purpose of the records revie��was to obtain and reviev�°records that may assist in identifying RECs in connection ��ith the Property. Some of the records reviewed pertain to the Property as u�ell as to properties within an additional ASTM specified search distance. These records were reviewed in an effort to evaluare the potential for migrating hazardous substances or petroleum products to impact the Properry. Unless otherv��ise stated, the approximate minimum search distances used were as specified in ASTM Standard E 1527-05. 4.1 Physical Setting 4.1.1 Regional Geologic and Hydrogeologic Setting The following information has been summarized froin geologic information provided in the EDR report, the USGS Excelsior 75-minute topographic quadrangle, the Surficial Geology Map and the Bedrock Geology Map from the Hennepin County Geologic Atlas, Universiry of Minnesota, Counry Atlas Series Atlas C-4. The Surficial Geology of the Hennepin Counry Geologic Atlas, compiled by Meyer and Hobbs, 1989, depicts surficial soils as loamy till and organic deposits. Loamy till is defined as chiefly loam-texture, unsorted sedimenr with scattered pebbles, cobbles and boulders. Lenses of stratified sediment are uncominon in most areas. Organic deposits are defined as peat and organio-rich sediment and includes small bodies of open water. The Geologic Map of Minnesota, Bedrock Geology, 1989 depicts bedrock beneath the Site as St. Peter Sandstone and Prairie Du Chien Group. The east side of the Property is depicted as St. Peter Sandstone. The upper half to two thirds is described as fine to medium-grained, friable quartz sandstone. The lower part contains multicolored beds of mudstone, siltstone, and shale with interbedded very coarse sandstone. The western portion of the Properry is depicted as Prairie Du Chien Group which is described as dolostone that ��aries areatly in thickness because its top is a major erosional surface. The lower part is less sandy except within 10 or 15 feet of the base which marks a transitional boundary with the Jordan Sandsrone. The Prairie du Chien Group is karsted and may be rubbly��here remnants less than SO feet thick are covered by the St. Peter Sandstone. It is presumed, based on the USGS map and the Water Table System Map by the Hennepin Counry Geologic Atlas, that regional ground water flow is to the south, (towards the Lake Minnetonka, which is located approximately one mile to the south), and also reflects the topography and natural drainage. In addition, a small creek runs north and south across the western portion of the Properry which eventually drains into Lake Minnetonka. Locally, ground water is expected to flow to the creek or other nearby low-lyina wetland areas. The assumed flo�� direction is based on the assuinption that ground water closely mimics surface topo�raphy. This does not take into account any historic cut and fill activity, shallov�� bedrock or Unobserved artificial conditions. The estimated depth to shallov�� ground��ater in the area is less than 10 feet belov��ground surface (bgs). Carl.eon Professional Sera,�ices, Inc. Page 6