(a) The water quality monitoring system shall
accurately characterize groundwater flow, groundwater chemistry and flow
systems on the site and adjacent area. The system shall consist, at a minimum,
of the following:
(1) At least one monitoring
well at a point hydraulically upgradient from the disposal area in the
direction of increasing static head that is capable of providing representative
data of groundwater not affected by the facility, except when the facility
occupies the most upgradient position in the flow system. In that case,
sufficient downgradient monitoring wells shall be placed to determine the
extent of adverse effects on groundwater from the facility.
(2) At least three monitoring wells at points
hydraulically downgradient in the direction of decreasing static head from the
area in which solid waste has been or will be disposed. In addition to the
downgradient wells, the Department may allow one or more springs for monitoring
points if the springs are hydraulically downgradient from the area in which
solid waste has been or will be disposed, if the springs are developed and
protected in a manner approved by the Department and if the springs otherwise
meet the requirements of this subchapter.
(3) A leachate detection system for the
disposal area, when required for the facility.
(4) A leachate collection system for the
disposal areas, when required for the facility.
(5) Surface water monitoring points approved
by the Department.
(b)
The upgradient and downgradient monitoring wells shall be:
(1) Sufficient in number, location and depth
to be representative of water quality.
(2) Located so that they do not interfere
with routine facility operations.
(3) Located within 200 feet of the permitted
disposal area, except as necessary to comply with subsection (c), and located
at the points of compliance.
(c) In addition to the requirements of
subsection (b), upgradient monitoring wells shall be located so that they will
not be affected by adverse effects on groundwater from the disposal
area.
(d) In addition to the
requirements of subsection (b), downgradient monitoring wells shall be located
so that they will provide early detection of adverse effects on groundwater
from the disposal area.
(e) Wells
drilled under this section shall be drilled by drillers licensed under the
Water Well Drillers License Act (32 P. S. §§
645.1-645.13).
(f) The well materials shall be
decontaminated prior to installation.