06/10/1993 BOARD OF HEALTH Minutes

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MINUTES June 10 , 1993 3 BOARD OF HEALTH Board members forwarded their signatures to the "Emer- gency Repair Certification" form. At this time, (7: 37 p.m. ) Mr. Ball motioned to enter into Ex- ecutive Session, Mr. Greelish seconded, all agreed. The regular meeting reconvened at 8 : 02 p.m. Copy of letter from Town Counsel to Planning Board re: "Flat Pond" Board members agreed this matter does not require Ex- ecutive Session. Mr. Heather Atwood, Environmental Consultant, and Mr. Michael Grotske, representing New Seabury Corporation, were in attendance to discuss the installation of monitoring wells down gradient of the proposed "Flat Pond" subdivision. Ms. Atwood presented plans delineating proposed monitor- ing well sites and relayed, "We have been retained to do an environmental impact study of the effects the proposed subdi- vision may have on Fiat Pond. " "We have some preliminary results from the surface water shed area and a groundwater recharge area. " "From that information we would like to in- stall a few additional wells to comply with the water quality report requirements. " "We had planned for all our data to be in by the 16th and presented at that time. " "The wells that were installed were to delineate the recharge area not so much as down-gradient to evaluate septic system impacts. " "What we are proposing as a surface water shed, (indicated in purple) , is about 100' around the mucky soils. " "We in- stalled 1" p.v.c. pezometers both shallow and deep around the perimeter of the pond. " "We also took water table measure- ments, did a groundwater contour map and found the groundwa- ter is flowing through the pond out to the sound. " "Pre- liminary results indicate the groundwater recharge area only extends 200' to 250' up-gradient of Flat Pond. " "The average depth of the pond is only 3 feet." "Our research' indicates tidal fluctuations are making a big impact on the pond. " "The data results show the salinity in the bottom of the pond and some tributaries is very high and brackish at depths. " "We also found up to . 2/10ths to . 3 /10ths of a foot' tidal fluctuations in both pezometers groundwaters and the level of the pond. " Mr. McQuaid questioned Ms. Atwood as to what method was used to outline the original recharge zone.