[Adopted 3-15-1986]
Pursuant to its authority under MGL c. 111, § 31, the Deerfield Board of Health has adopted the following additions to its regulations governing the use of subsurface sewage disposal systems.
A. 
An individual sewage disposal system must be located a minimum of 100 feet from:
(1) 
A stream or brook.
(2) 
A watercourse that has water in it at the time of the percolation test or during the percolation season.
(3) 
A watercourse which could be expected to carry water as a result of snowmelt, sudden heavy rainstorm and/or extended heavy rainfall.
(4) 
A swamp.
(5) 
An area which could be expected to be inundated during heavy rainfall by virtue of its geography or location.
B. 
An individual septic disposal system must be located a minimum of:
(1) 
20 feet from any lot line.
(2) 
150 feet from any well or surface water supply.
(3) 
A distance of 200 times the slope of any downhill incline (expressed as y/x).
The use of raised leach fields shall not be permitted in new construction.
A. 
A percolation test shall be deemed to have failed if:
(1) 
Ledge rock or other impervious material is found at a depth closer to the surface than will permit at least six feet of naturally occurring soil suitable for disposal of the liquid effluent of a sewage disposal system.
(2) 
Water or the evidence of the continued presence of water is found at a level of depth closer to the surface than will permit at least six feet of naturally occurring soil which is suitable for disposal of the liquid effluent of a sanitary disposal system.
B. 
The minimum percolation rate shall be 20 minutes per inch.
C. 
Percolation tests may not be conducted in any location where the frost line has extended below a level of 15 inches.
D. 
Percolation test sites must be marked in an enduring manner, such as with a metal pin or wooden stake or so that they may be located accurately in the future.
E. 
Any location which has failed a percolation test may not be retested for a period of 12 months. The area within a radius of 25 feet from the test site shall be included in the area which may not be retested.
In addition to the requirements of 314 CMR 15.00, Title 5, Section 2.5, an application for disposal works construction permit shall contain the following information: the street address of the lot to be served, the Assessor's map and lot number for the property and the names of abutting property owners.
The minimum leaching area for any sewage disposal system shall be 1 1/2 times the requirement of Title 5, Section 3.4 or 1,000 square feet, whichever is greater.
Any duplex housing structure shall have a minimum one-thousand-five-hundred-gallon capacity septic tank and a minimum one-thousand-five-hundred-square-foot leaching area.
These regulations shall be effective March 15, 1986, with the following exceptions:
A. 
Any percolation test approved by the Board of Health or its agents prior to the effective date of these regulations shall not be affected by these regulations for a period of two years from the date of approval, at which time such approved tests shall become fully subject to these regulations.
B. 
Similarly, any disposal works construction permit issued prior to the adoption of these regulations shall be exempt for a period of two years from the date of issuance of the permit, at which time it shall become fully subject to these regulations.