8/12/2010 ENVIRONMENTAL OVERSIGHT COMMITTEE Minutes

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Ilk } t Mr. York has been investigating other sources of funding for remediation in Santuit Pond and in the process, discovered the reverse layering method utilized by Kerfoot Technologies in a local demonstration project 10 years ago. Mr. York introduced Dr. Kerfoot to describe the process which removes the sand from below the muck in order to place it on top of the muck. Mr. York also noted that further studies and sampling would be needed to determine if the method would be successful in Santuit Pond. Mr. York added that Santuit Pond needs to be addressed soon because toxic algae could appear at any time. Chairman Cahalane reported that he received phone calls from Kwan Toby of the Tribal Natural Resources as well as from Chuckie Green. Interest was expressed from the Tribe regarding the SolarBee technology and it was noted that, should that Town apply for the state administered Section 319 funding with the support of the Tribe, funding may become available for remediation in Santuit Pond. Dr. Kerfoot suggested that the EPA was seeking demonstration areas for sediment treatment adding that funds may be available to support the methods such as reverse layering. Dr. Kerfoot described his project at Red Lilly Pond in Craigville where algae and vegetation had taken over the pond resulting in 5 feet of muck deposits and creating a health concern and aesthetic issue. A feasibility study resulted in the use of the reverse layering method. The reverse layering method requires penetration through the muck area, pumping the sand from beneath and then distributing a minimum of 6 inches on top of the muck to create a stable barrier trapping the nutrients below. At Red Lilly, 20 foot by 2 foot pipes to pipe and distribute the sand. Dr. Kerfoot shared photos of the treated south side of the pond to the untreated north side of the pond. Dr. Kerfoot reported that phosphorus levels are lower and that fish are present. Regarding costs, Dr. Kerfoot stated that sand layering was more cost effective than dredging since transportation costs are not associated with the process. Ten acres were treated at Red Lilly Pond 8 years ago and the longevity of the treatment was expected to be 25 years. The use of additional treatment could extend the life of the treatment. Dr. Kerfoot stated that the Red Lilly project received some funding as a demonstration project. Dr. Kerfoot quoted a possible estimate of$20,000 per acre for treatment in Santuit Pond. It was noted that Santuit Pond was 172 acres and Dr. Kerfoot responded that particular areas are prioritized for treatment. Mr. York questioned the availability of follow up data, such as with phosphorus figures and Dr. Kerfoot stated that he would need to check on the follow up data. Mr. Waxman expressed concerns about the displacement of sand and issues of inflow. Chairman Cahalane stated that sand layering offers an interesting option that may require further information. Mr. York suggested that it might be an option for Mashpee River. The Committee discussed the content of the final report. Chairman Cahalane suggested that, at approximately $16 million, dredging would be an unlikely option and he recommended that a solution be considered that would allow the greatest access to funding. The Chair noted his interest in the SolarBee technology and questioned the interest of the Friends of Santuit Pond. Mr. Waxman, of 3 5 Santuit Pond Road, responded that many members of the organization have been concerned about the issues in the pond for a long time. The Friends carefully considered the AECOM report, their recommendations and the alternative methods. Mr. Waxman wrote an article for the Enterprise, co-authored by Kwan Toby, describing the four recommended alternatives. Mr. Waxman emphasized Mashpee as a green town requiring a green solution and 2