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ANOKA COUNTY GROUND WATER MONITORING STUDY <br /> <br />BARR ENGINEERING COMPANY - CONSULTING ENGINEERS <br /> 6800 France Avenue South <br /> Minneapolis, Minnesota 55435 <br /> <br />The following sets forth the generalized work plan which <br />will be used to review and evaluate the ground water monitoring <br />activities at the four licensed landfills in Anoka County <br />a.nd the hazardous waste pit in Andover. This work plan will <br />provide the basis for recommendations regarding closure and . <br />post-closure needs at each of the landfills. <br /> <br />TASK 1 <br /> <br />REVIEW PAST CONSTRUCTION AND OPERATING PRACTICES - <br /> <br />The objective of this task will be to assess the <br />effect that past construction and operating practices <br />have had on the generation of leachate from each <br />landfill. The input for this.work will be obtained <br />through the Anoka County Community Health Department <br />data files and field inspections of each of the <br />four sites. New data that may be necessary include <br />permeabilities and grain size distributions of <br />mineral soils used for cover material at each <br />landfill and permeabilities and grain size distributions <br />of both sources of the lime sludge used for cover <br />material at many of the landfills. This work will <br />also involve a review of the c~rrent research <br />relating to the role of operating and construction <br />practices on the generation of leachate. Comparisons <br />will be made on past operating and construction <br />practices at each landfill with the current knowledge <br />on the role of operating and construction practices <br />of the generation of leachate and conclusions will <br />be drawn relative to the impact of current and <br />past operating and construction practices on <br />leachate generation at each landfill. <br /> <br />TASK 2 <br /> <br />ASSESS RESULTS OF WATER QUALITY MONITORING PROGRAM - <br /> <br />Data available from ground and surface water <br />monitoring programs at each of th~ landfills will <br />be reviewed and assessed. To the extent allowed <br />by the available data, a determination will be <br />made whether ground water has been impacted at the <br />various monitoring locations and if ground water <br />has been impacted, a determination will be made <br />when the impacts begin to occur and the degree to <br />which they have increased. This review will <br />include ground water and surface water quality <br />data and ground water evaluation data. <br /> <br /> <br />