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City of Roseville - Planning Commission Minutes for May 3, 2006Page 4 of 9 Concrete and asphalt crush better in colder temperatures and the moisture in the pile recycled materials creates a frozen shell which also helps to minimize dust. Chair Traynor asked for an explanation on decibel levels. Wutzke responded that the crushed typically emits an 85 to 90 decibel level which requires approved ear protection for workers. At 100 to 150 feet people should be able to carry a conversation. Member Doherty asked whether the MPCA regulated noise. Wutzke responded that they do not. Frattalone, however, utilizes the federal minimum standard. Doherty further asked if the silt fence would reduce noise (no). Doherty asked whether this site would experience dust like in the video. Wutzke indicated the goal is zero visibility emission. Member Wozniak asked about controlling runoff (control on site) given close proximity to adjacent water body. Wutzke indicated that most water used to control dust is absorbed in product--however rains like past few days can create standing water. Silt fencing (double row) usually controls run-off-- has not been an issue in the past. Chair Traynor asked whether lights would be used and how intense. Wutzke stated that they employ spot lights that shine directly on certain aspects of the operation, which may cause a glow similar to auto dealers along west side of 35W but light will not be directed off the site. Traynor asked Jason Kunze, Braun Intertec (environmental consultant) questions related to environmental impact from structure demolition. Kunze stated that no impacts should exist--a pre- demo hazardous survey is required/approved by MPCA, which requires the removal of all hazardous material (like mercury switches & asbestos) to be removed prior to demolition. Member Wozniak added that is he heard the Chair’s question correctly--interested in knowing whether any building material (slab/wall section) can be contaminated. Kunze indicated there is always a potential but identification and abatment is a requirement of the process--if determined it would be hauled off the site prior to demo. Member Doherty asked about asphalt driveways and parking area that are contaminated with gas or oil. Kunze stated that asphalt is petroleum and therefore by nature contaminated. Where spills and certain stains are detected they would analyze and take appropriate action so as not to contaminate the pile. Traynor asked whether there is a secondary check before/during crushing in case something does slip through undetected. Wutzke stated that the crew is trained to spot such items and if identified the process is stopped and a technician is sent out to evaluate and take appropriate action Member Roe asked whether the dust--other than being a nuisance--has additional environmental concerns when leaving the site, getting into the surface waters, on people’s property, or on people. Kunze stated that there would need to be a very high concentration (substantial dust) to be a health risk especially with the site’s open environment. Karen Milton, 2939 Mildred Drive, addressed the Commission with a question regarding the timing of the temporary operation--if the site is to be used until 2008 when would crushing be completed a second time. Theresa Greenfield stated that they hope to complete all crushing this construction season, but if they are unsuccessful in acquiring the Hagan parcel they would come back before Planning Commission seeking an extension. Milton added that based on current language in IUP, the applicant could crush until May 2007. Greenfield stated that their intention is to crush only until the second or third week of February 2007. Milton asked how wildlife would be impacted. Greenfield stated that no detailed analysis had been completed--but noise and vibrations from 35W and industrial activities have not appeared to impact existing wildlife. She added that there will continue to be construction activity (outside of the crushing operation) that will generate noise and vibrations. Tamara McGehee, asked how the item/hearing was noticed. The City Planner indicated that staff used the recent Council supported notification process whereby the longest length of a project site is http://www.ci.roseville.mn.us/council/planning/minutes/2006/pm0503.htm12/13/2006