(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 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 area, 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 as not to 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.