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From:Juan A.Bacigalupi To: Robert Whritenour Date:219198 Time:05:42:44 Page 8 of 9 <br /> f <br /> that all other wells would be options. Members of the team were prompted to raise a second concern <br /> based on the Plume Analysis Design Plan.,,,- olume 2. This document refers to the construction of the <br /> containment systems for the different plumes no longer occurring simultaneously,but would begun <br /> with LF-1 and Ashumet valley where construction would be-gin in August 1996. Procurement <br /> process for the remaining plumes would begin at some unspecified future date,would require more <br /> than one month to gain, and result in construction delays(phase two of the plan). Team members will <br /> submit additional comments later. <br /> VI. Concerns about Biological and Recreational Resources <br /> The kettle hole ponds and groundwater fed streams in the area surrounding the Massachusetts <br /> Military Reservation are outstanding natural and recreational resources. The massive disruption to <br /> groundwater flow patterns contained in the 60%design plan has a major potential to impact these <br /> resources negatively. OPTECH and the IRP must modify the final design plan to reduce these <br /> impacts. <br /> a. Potential Impacts on Trout Ponds. The deep, groundwater supplied kettle hole ponds <br /> of the Upper Cape offer excellent habitat for trout. The Massachusetts Division of Fisheries <br /> and Wildlife has been heavily stocking these ponds for many years. Area trout ponds include <br /> Ashumet, Johns, Mashpee-Wakeby,Peters,Pimlico and Deep ponds. Groundwater draw <br /> downs and groundwater mounding could negatively impact the trout ponds in the area. <br /> Reduced groundwater supply to trout ponds would detrimentally affect the late spring and <br /> summer trout fishery in the ponds. As water temperatures warm and the pond stratifies,the <br /> influx of cold,well-oxygenated groundwater,maintains trout populations. Reduced <br /> groundwater input would reduce the trout habitat in these ponds. Trouts depend on the habitat <br /> supplied by groundwater inputs to the pond(i.e., springs)to survive during the summer <br /> months when the bulk of the pond either is too warm(>70 F)or has too little oxygen(< 5 ppm <br /> dissolved oxygen). <br /> Ashumet and Johns Pond have the potential for some serious draw downs given the <br /> 60%design pan. These lThponds are two of the most important trout ponds on Cape Cod. These <br /> two ponds combined receive about 10%of the total yearly trout stocking for Cape Cod. <br /> Ashumet and Johns Ponds also receive high fishing pressure for smalimouth bass and <br /> largemouth bass due to excellent bass populations and access ramps provided by the <br /> Massachusetts Department of Fisheries and Wildlife and the Public Access Board. <br /> b. Peters Pond. Peters Pond is an outstanding cold water pond,heavily stocked with <br /> brook,brown and rainbow trout and Atlantic salmon. The treated groundwater from the FS- <br /> 12 containment system will flow into Peters Pond. Treated groundwater should be close to <br /> ambient groundwater temperatures and at saturation levels for dissolved oxygen to preserve <br /> the outstanding cold water habitat and holdover trout fishery in this pond. <br /> C. Ashumet Fond. The present 60%design calls for a large interception of groundwater <br /> on the north side of Ashumet Pond due to the containment of the CS-10 plume. This is the <br /> area that normally supplies groundwater to Ashumet Pond. In addition,the design plan states <br /> � PPes <br /> 5 <br />