A.
Findings. Town of Easton finds the following conditions to occur:
(1)
The ground water underlying the town is the sole source of its existing and future drinking water supply;
(2)
The ground water aquifers are integrally connected with and flow into the surface waters, lakes, ponds and streams which constitute significant recreational and economic resources used for water related recreation and fishing;
(3)
Accidental spills and discharges of petroleum products and other toxic or hazardous materials and sewage discharge have repeatedly threatened the quality of such ground water supplies and related water resources throughout Massachusetts, posing potential public health and safety hazards and threatening economic losses to affected communities;
B.
Aquifer Protection Overlays Districts; Establishment and Location. The Aquifer Protection Overlays District (APOD) shall be as delineated on the Zoning Map of the Town of Easton and shall be superimposed over any other district established by this chapter. They are based upon a five-foot contour interval water table map, surficial geologic mapping and ground water modeling.
[Amended 5-15-2017 ATM by Art. 29]
C.
Prohibited Uses. Within an APOD, the following uses are specifically prohibited:
(1)
Sales or storage of fuels;
(2)
Junk yards;
(3)
Municipal sewage treatment facilities with on-site disposal of primary or secondary treated effluent;
(4)
Packaged sewage treatment plants;
(5)
Car washes;
(6)
Road salt stockpiles not stored in approved structures;
(7)
Dumping of snow from outside the district;
(8)
Dry cleaning establishments;
(9)
Motor vehicle and boat service and repair facilities;
(10)
Metal plating establishments;
(11)
Veterinary clinic/animal hospital;
(13)
Chemical and bacteriological laboratories;
(14)
Any other use which involves as a principal activity the manufacture, storage, use, transportation or disposal of toxic or hazardous materials, except as allowed by special permit in this section;
(15)
Sanitary Landfills; specifically excluded from this provision is the continued use and vertical expansion of the existing municipal sanitary landfill off Prospect Street in accordance with approval by the Massachusetts Department of Environmental Protection (DEP);
(16)
Solid waste facilities; with the specific exception that the existing landfill located off Prospect Street may be converted to a composting facility and/or a solid waste transfer station;
(17)
Land filling of sludge and septage.
D.
Density Regulations. Residential dwellings shall be permitted only at a density not greater than that allowed in Article IV.
E.
Special Permit Uses. Within the APODs the following uses shall be allowed only upon receipt of a special permit from the Planning & Zoning Board:
F.
Special Permits; Procedures. The Special Permit Granting Authority (SPGA) under this Section shall be the Planning & Zoning Board. Such special permits shall be granted if the SPGA determines, in conjunction with the other Town agencies indicated below, that the intent of this Section, as well as its criteria, are met. In making such a determination, the SPGA shall give consideration to the simplicity, reliability and feasibility of the control measures proposed and the degree and threat to water quality which would result if the control measures fail.
(1)
Review by Other Town Agencies. Upon receipt of the special permit application, the SPGA shall transmit one copy to the following: Department of Public Works, Water Division, Board of Health, Zoning Board of Appeals, Conservation Commission and the Building Commissioner for their written recommendations. Failure to respond within 30 days shall indicate approval or no desire to comment by said agency. The necessary number of copies of the application shall be furnished by the applicant.
G.
Special Permit; Criteria. In lieu of the criteria set forth in § 235-56B, special permits under this Section shall be granted only if the SPGA determines, in conjunction with the Department of Public Works, Water Division, that ground water quality resulting from on-site wastewater disposal and other on-site operations remains within current EPA and DEP standards for drinking water at the downgradient property boundary.
H.
Special Permit; Submittals. In applying for a special permit required by this section, the applicant shall provide the following information:
(1)
A complete list of all chemicals, pesticides, fuels and other potentially toxic or hazardous materials to be manufactured, used or stored on the premises in quantities greater than those associated with normal household use, accompanied by a description of measures proposed to protect all storage containers/facilities from vandalism, corrosion and leakage and to provide for the control of spills.
(2)
A description of potentially toxic or hazardous wastes to be generated, indicating storage and disposal methods.
(3)
Evidence of approval by the DEP of any industrial waste treatment or disposal system or any wastewater treatment system with a capacity of 15,000 gallons per day or more.
(4)
Projections of downgradient concentrations of nitrogen and other relevant chemicals at property boundaries and other locations deemed pertinent by the SPGA. Projections shall be based upon appropriate ground water models and the following information/standards:
(a)
Nitrogen loading calculations.
(b)
Groundwater flow and impacts to drinking water and supply wells.
[1]
Identify probably impacted water supply well(s) by constructing flow lines on the Easton Water Table Map (IEP, 1986) downgradient of the proposed site
[2]
Use 15 inches per year for sand and gravel and seven inches per year for till for aril recharge rates
[3]
Determine the value for hydraulic conductivity from the closest downgradient public water supply well in the Easton Aquifer Protection Plan (IEP, 1986)
[4]
Determine the saturated thickness of the site as shown on the Saturated Thickness Map (IEP, 1986) supplemented with on-site borings.
(5)
When an application is made for a building permit which involves the use of land in the APOD, the Building Commissioner shall require that the applicant for such a permit provide a plan of the lot on which the proposed development is intended showing two-foot contour intervals. The datum shall be the National Geodetic Vertical Datum and the bench marks shall be identified on the plan. The plan shall be stamped by a Registered Engineer or Registered Land Surveyor. The Building Commissioner shall transmit one copy of the plan to the following Town agencies for written comments: Department of Public Works, Water Division, Board of Health, Planning & Zoning Board and Conservation Commission.
I.
Design and Operations Guidelines. The following design and operation guidelines shall be observed within the APODs.
(1)
Safeguards. Provisions shall be made to protect against toxic or hazardous material discharge or loss resulting from corrosion, accidental damage, pillage or vandalism through such measures such as:
(a)
Prohibition of underground fuel storage tanks;
(b)
Spill control provisions in the vicinity of chemical or fuel delivery points;
(c)
Secured storage areas for toxic or hazardous materials;
(d)
Indoor storage provisions for corrodible or dissolvable materials;
(e)
A closed vapor recovery system for each structure which allows the evaporation of toxic or hazardous materials into its interior to prevent discharge of contaminated condensate into the ground water.
(2)
Location. Where the premises are partially outside the APOD, potential pollution sources such as on-site waste disposal systems shall be located outside the District to the extent feasible.
(3)
Disposal. For any toxic or hazardous wastes to be produced in quantities greater than those associated with normal household use, the applicant must demonstrate the availability and feasibility of disposal methods which are in conformance with MGL c. 21C, as amended.
(4)
Drainage. All runoff from impervious surfaces shall be recharged on the site, diverted towards areas covered with vegetation for surface infiltration to the extent possible. Dry wells shall be used only where other methods are not feasible and shall be preceded by oil, grease and sedimentation traps to facilitate removal of contaminants.
J.
Violations. Written notice of any violations of this Section shall be provided by the Building Commissioner to the owner of the premises with said notice specifying the nature of the violation(s) and a schedule of compliance, including cleanup of any spilled materials. This compliance schedule must be reasonable in relation to the public health hazard involved and the difficulty of compliance. In no event shall more than 30 days be allowed for either compliance or finalization of a plan for longer-term compliance.