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'06/13/2912 13:25 6517775973 <br /> PC Exhibit C ` <br /> RE: Landscape Project far Russ Schumer June 13, 2012 <br /> 1. 1 have revlewed the landscape plan for work done at the Russ Schumer property along with the <br /> technical information regarding the woven agricultural fabric utilixed under the rocked a�eas <br /> around the stairs and pond- The fabric itself has a water flow or perc rate of 6 gallons/min/SF. <br /> This far exceeds the perc rate of grass and top soll. 7he fabric is overlain with clear�ock which is <br /> also more pervious than grass and top soil. It is my professional opinion that the porosity of the <br /> IandsCaping work does not adversely impact the quality of the receiving water or the aquifer <br /> recharge. In fact, cansidering the fertillzers typically associated with turfed areas and the <br /> potential for erosion on the sloped areas,the reduaion in the turfed areas probably improves <br /> � �..� .water quallty. ------ �� - . . <br /> 2. The City of Orono may have concerns that the fab�it may eventually clog and, over time, may <br /> ��'= Iose svme of its porosity characteristics. The use of clear�ock on top of the fabric greatly aids in <br /> reducing t�iis concern. Mitigation measures shvrt of�emoving the work could be employed to <br /> allay the City's concerns. These may i�clude puncturing the fabric at specified intervals and/or <br /> incorporating plantings in the landscaped a�eas to allaw water to flow past the fabric. <br /> 3. I have attached the speC sheet for the fabric to this memo. <br /> � ' <br /> Joel A. Rogers P.E. <br /> 651-341-7.369 <br />