Definitions. For purposes of this section, the following
terms are defined below:
AQUIFER
Geologic formation composed of rock, sand or gravel that
contains significant amounts of potentially recoverable water.
IMPERVIOUS SURFACE
Materials or structures on, above or below the ground that
do not allow precipitation or surface water to penetrate directly
in the soil.
INTERIM WELLHEAD PROTECTION AREA (IWPA)
Where the Zone II has not yet been delineated and approved
by the Massachusetts Department of Environmental Protection (DEP),
an interim wellhead protection area shall consist of the area within
a one-half-mile radius (2,640 feet) measured from the well or wellfield
for sources whose approved pumping rate is 100,000 gpd or greater.
Regulations applying to a Zone II shall apply equally to an interim
wellhead protection area.
MINING
The removal or relocation of geologic materials such as topsoil,
sand, gravel, metallic ores or bedrock.
RECHARGE AREAS
Areas that collect precipitation or surface water and carry
it to aquifers. Recharge areas may include areas designated as Zone
I, Zone II or Zone III.
TOXIC OR HAZARDOUS MATERIAL
Any substance or mixture of physical, chemical or infectious
characteristics posing a significant, actual or potential hazard to
water supplies or other hazards to human health if such substance
or mixture were discharged to land or water of the Town of Barre.
Toxic or hazardous material include, without limitation, synthetic
organic chemicals, petroleum products, heavy metals, radioactive or
infectious wastes, acids or alkalis, and all substances defined as
toxic or hazardous under MGL c. 21C and 21E and 310CMR 30.00, and
also include such products as solvents and thinners in quantities
greater than normal household use.
WELLHEAD PROTECTION DISTRICT
The zoning district defined to overlay other zoning districts
in the Town. The Wellhead Protection District may include specifically
designated recharge areas.
ZONE I
The protective radius required around a public water supply
well or wellfield. For purposes of this bylaw, the required radius
is 400 feet.
ZONE II
That area of an aquifer which contributes water to a well
under the most severe pumping and recharge conditions that can be
realistically anticipated (180 days of pumping at safe yield, with
no recharge from precipitation). It is bounded by the groundwater
divides which result from pumping the well and by the contact of the
aquifer with less permeable materials such as till or bedrock. In
some cases, streams or lakes may act as recharge boundaries. In all
cases, Zone II shall extend up gradient to its point of intersection
with prevailing hydro-geologic boundaries (a groundwater flow divide
in contact with till or bedrock, or a recharge boundary).