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Item 3A - Minutes Approval
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Item 3A - Minutes Approval
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4/11/2005
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him some level of comfort given that community's strong environmental tradition. He said that Ms. <br />Taylor had raised an interesting question in regard to the persistence of the chemicals in question, and <br />suggested that be further researched. Mr. Lankston said that CMA breaks down into calcium and <br />magnesium ions and acetate as soon as it encounters water. The acetate was biodegradable. The calcium <br />and magnesium were not very mobile but were commonly found in both soil and water and were not really <br />a problem. With regard to magnesium chloride, the chloride broke down fairly quickly in the environ- <br />ment, so there was not a persistence problem, particularly at the levels being used. <br /> <br />Mr. Kelly said the resolution before the council appeared to lack a section included in the previous <br />resolution that stipulated a de-cier would not be used unless it was approved by the City Manager, and <br />only after the manager received information that the de-icer was safe and cost-effective. Mr. Lankston <br />had no objection to including that section. <br /> <br />Mr. Pryor said he was impressed with the report and the effort it represented. He recalled the traditional <br />use of salt to combat icy conditions, which was also corrosive. He believed the de-icers in question were <br />a great step forward in contrast to both that and sand and gravel. Mr. Pryor was pleased staff was making <br />an effort to use the most effective products with the least impact on the environment and on City streets. <br />He was inclined to support the resolution and wait to hear more in the future as the City had more <br />experience with the chemicals in question. <br /> <br />Ms. Bettman asked if staff was proposing to use both CMA and magnesium chloride. Mr. Lankston said <br />yes, as different conditions warrant different treatments. CMA worked well as an anti-icer but was <br />expensive to use as a de-icer, and it was not very effective below 25 degrees. <br /> <br />Ms. Bettman said she had to balance the gain from the use of the products against the hazards they caused. <br />She expressed concern that the magnesium chloride had residual elements of other heavy metals that were <br />bio-cumulative, like lead and cadmium. Mr. Lankston said the Pacific Northwest Snowfighters set strict <br />limitations on both lead (1 part per million) and cadmium (.2 parts per million), which was essentially the <br />testable limit for those metals. The intent of the specifications was to keep such metals out of the product. <br />Mr. Lankston said since the studies had been done, much progress had been made in eliminating those <br />elements. Ms. Bettman asked if there was a product that did not contain heavy metals. Mr. Lankston <br />reiterated that the intention of the specifications was to eliminate those metals. City Manager Taylor <br />indicated the City would only buy products that met the specifications set by the Pacific Northwest <br />Snowfighters. Ms. Bettman said that while a threshold had been established, the products still contained <br />those heavy metals. Mr. Lankston repeated that the specifications were intended to eliminate those <br />metals. Ms. Bettman did not believe she received a definitive answer to her question. <br /> <br /> Responding to a question from Ms. Bettman about monitoring for water quality and aquatic life, Mr. <br /> Lankston said the City monitors all stream corridors now and would continue to monitor them for impact. <br /> He said if it was found a product was harmful to the environment, the City would discontinue its use. <br /> <br /> Ms. Bettman asked if the City would retain its sanding equipment. Mr. Lankston said yes. He said the <br /> City would continue to sand and plow snow. Ms. Bettman asked if the use of chemical de-icers required <br /> new equipment. Mr. Lankston said the spray units that City uses fit into its existing trucks and cost about <br /> $10,000. <br /> <br /> Ms. Solomon asked if the City had to store the materials or if staff filled the spray units on an as-needed <br /> <br /> MINUTES--Eugene City Council February 28, 2005 Page 6 <br /> Work Session <br /> <br /> <br />
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