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The attached matrix shows pros and con of these options. The areas of concern are <br /> cost, environmental impact and use of rnntcrials. Based on the cost savings and the <br /> benefit of reusing the existing aggregate, it is Ramsey County's desire to use the detention <br /> pit f o crushing cxisting concrete and batchinr new concrete. <br /> Ramsey County is willing to work with the City of Roseville to establish regulations <br /> regarding the crushing operations. These regulations can be incorporated into the <br /> specifications and speciLil provisions for Larpenteur Avenue construction projects. Some <br /> examples of rcgulations which the County has considered to minimize the impacts of dust <br /> and noise are <br /> ® All crushing openations in a cri ven year would be completed by May l st. This wcUld <br /> allow the crushing to he crone before the summer months and while school was still in <br /> session. The only except ioll to this would be for the l=ist phase �f Larpenteur venu�� <br /> construction, ' year 2.000} when a week of crushing would be required in the <br /> summer. <br /> 2. Dust control measures would be implemented to minimize the dust produced by this <br /> operation. rushing the concrete in the early .spring will allow the use of water to control <br /> the dust. <br /> 3. Fours of the (lay, clays of the week and number of days for crushing are all items wliic h <br /> can be set prior t �t c �itrt�ct l Bing, awarded .so the contractor can be informed prier to a <br /> givcn project. <br /> Please review the following information and let me know if you have any questions. we <br /> leek forward to working with the City of Roseville on this issue. Thanks for your <br /> continued assistance in this project. <br /> Sincerely, <br /> )c1pni - <br /> Daniel E. Soler, P.E. <br /> Project Manager^Larpenteur Avenue <br /> cc: Commissioner Jan Wiessner <br />