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• ON August 31, 1976 , To: All Concerned From: Gary Davis Re: Notes on discussions of two well Drilling Logs with Mr. Tom Calabresa, DNR, and Professor David Stephenson, ground-water geologist. Mr. Calabresa After examining the two drilling logs (Davis, Williams), Mr. Calabresa explained that while he didn't wish to alarm us, the situation currently is dangerous enough to warrent investigation. He (or someone else) will be out in about one week to collect water samples from as many homes as possible. The difficulty, using data from Williams' log, is the very limited cover over the.bedrock. There is surface soil only to 8 feet, then highly fissured dry limestoriefroa 8 to 95 feet, then sandstone and limestone (also dry and fissured) from 95 to 120 feet, then sandstone N from 120 to 295 feet. The water table was at 180 feet. The well was cased only to 40 feet. - Therefore, there is a 140 foot open hole through dry, fissured limestone which could easily be contaminated by effluents from a septic drain field. He noted that the 40-foot casing would not have been seen as a problem unless the area was to be further developed. Mr. Calabresa noted also that the reason the hill perks so well is that as soon as the water seeps through the thin surface soil it simply drops through the cracks in the limestone. As for the effluent from the drain fields, the only direction it goes is down, also through the cracks in the limestone. He recommended that each of us should have our water tested twice per year. Prof. Stephenson Stephenson agreed entirely and added that the quality of the effluent when it leaves the 8 feet of surface soil is about the same as when it enters the water table and the well 180 feet down. There is very little (or no) additional filtration through the fissured limestone.