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Mr. Bill Buglass ZGEO, LLC Hydrogeologic Assessment 410, at the Site, and a fence with a locked gate would surround the Site. In addition, a spill prevention, control and countermeasure plan would be implemented that outlines procedures, such as using absorbent materials, in case of an accidental spill. The proposed sand and gravel operation is not likely to impact the groundwater quality based on the records of previous mining operations. At an aggregate operation in the city of Muskego, Waukesha County, where mining below the water table has been in operation for approximately twenty years, no groundwater impacts have occurred (July 10, 2003 phone conversation with Clint Weninger, Professional Geologist, Payne and Dolan, Inc.). In agreement, Dr. Ken Bradbury, Hydrogeologist with the Wisconsin Geological and Natural History Survey, stated in a recent interview on October 27, 2003 that he was not aware of any quarry that has caused groundwater contamination. CONCLUSIONS Based on the information reviewed regarding the proposed sand and gravel mining operation and the hydrogeologic conditions, ZGEO concludes that the proposed mining at the Site will not result in adverse impacts on the quantity or quality of the local groundwater system. Additionally, the proposed operation will not adversely impact the capacity of the village of Brooklyn municipal wells. These conclusions are based on the following reasons: 1. The proposed sand and gravel extraction site is designed for"in the wet" operations, meaning that no dewatering activities/groundwater pumping will be conducted to lower the water table and no discharge of pumped groundwater will be released to surface waters. A well will not be installed as part of the operation. 2. The current project plans indicate that the Site will be isolated from local surface runoff patterns using constructed earthen berms. The berms will be 10 feet high and will surround the operation on all sides with the exception of the area where there are existing structures. The berms will be built during initial site development. 3. Sand and gravel washing will be conducted with water only, without the use of process chemicals, and no wash water will be discharged from the Site. 4. Changes in the water quantities entering or leaving the groundwater system at the Site are expected to be minor. 5. The will be no storage of chemicals or fuel at the Site. A spill prevention, control and countermeasure plan will outline procedures in case of an accidental spill that will minimize potential risk to the groundwater system. Sand and gravel mining at a Payne and Doyle site in Muskego operated below the water table for the last twenty years has not adversely impacted groundwater quality. 6. The village of Brooklyn wells are finished in the deep sandstone aquifer and cased to approximately 280 feet below ground surface. The zones of contribution for the supply wells do not extend to the Site. c:\ny docs\zgeo 2003\P&D 10/30/03 4