The Carlisle Mosquito Online

Friday, April 25, 2003


Shorts from the Board of Health, April 10

· 46 Lowell Street. Owner Steven Tierney explained that he is planning to renovate the kitchen and finish a family room on the top floor of the carriage house. The new room will be accessed through a current bedroom. This project, Tierney explained, should not change the room count of ten rooms, as one of the current bedrooms will be converted into a passageway.

The Tierneys bought the house in 1986 as a five-bedroom house. A new septic system, with five pits, was installed in 1973. Historical records describe the structure as a two-family house with two bedrooms each side.

The board accepted the house as a five-bedroom house with ten rooms, which requires no change to the current septic system.

· St. Irene's Rectory. Ed Sonn of Woodland Road reviewed the facts: the septic system for the St. Irene Rectory is in failure, while the new St. Irene Church septic system has excess capacity. The proposed plan is to tie the rectory into the church septic system. Earlier the Board of Health had requested wastewater flow data. Sonn said that the average flow rate for the rectory is 200 gallons per day, and for the church 195 gallons per day. The capacity of the system is 1,980 gallons. The board also had requested a contingency plan for enlarging the system, should the combined flow rates exceed 50% of capacity. Sonn presented an expansion plan and promised that flow rates would be monitored. The septic tie-in plan was approved.

· Percolation Rate Study. Effective January 2004, the Title 5 percolation rate for new construction will be decreased by the state from the current 60 minutes per inch, to 30 minutes per inch. This lowers the bar and may create more buildable lots in Carlisle. The board is gathering data on the performance of large systems to determine whether more stringent local percolation rate requirements are needed.

· 115 Partridge Lane. The septic system at 115 Partridge Lane failed a Title 5 inspection. Due to the constraints of the property and the existing house, the design, prepared by Norris Environmental Services, is not fully compliant. Septic exits are at the rear of the house not far from wetlands. The only acceptable area is in the front corner of the parcel, ten feet from the lot line and closer to the wetlands than specified in the bylaws. This requires an easement from the adjacent property, which fortunately is being purchased by the owners of 115 Partridge Lane. The board approved the system with the following waivers: setback from the property line is ten feet, versus the required 15 feet; the distribution box is 98 feet from the wetland versus 100 feet; the pump chamber and the septic tank are 56 feet from the wetland versus 100 feet. In addition, the depth of the leaching field to ground water was approved for four feet, rather than the five feet required if the percolation rate is less than two minutes per inch.

· 75 West Street. The plan for a septic system replacement at the property places the pump chamber and the leaching fields 90 feet and the septic tank 76 feet from a wetland, rather than the required 100 feet. Since the lot has considerable ledge and few ways of avoiding it, the board approved the septic plan, contingent on verification that the bedroom count is four.

· Drywell guidance policy. The board asked consulting engineer Rob Frado to draft a drywell guidance policy.

Water Testing

The Carlisle Board of Health has decided to go to an every-other-year schedule for sampling water in private wells, with sampling deferred until next year. However, they ask any property owners conducting their own water testing to please forward a copy of the results to the Board of Health, especially properties in the center of town.

2003 The Carlisle Mosquito