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a.,. ~ _. z 3. Permit conditions shall be protective of the existing ar~d reasonably potential future uses of the ground water that may be ai`fected. The Water Quality control Commission's ground water quality table values shall be used as a guide in establishing the permit conditions. 4. Where ambient ground water quality exceeds values for protection of existing and reasonable potential future uses of ground water, permit conditions shall be established to protect those uses against further lowering of ground water quality. In promulgating a rule that requires establishment of permit conditions protective of ground water, the Mined Land Reclamation Board made it clear that requirements should not be imposed that would require remediation of substances already in the ground water on the effective date of the permit conditions, unless such additional requirements are necessary to comply with standards or classifications adopted by the Water quality Control Commission. The Board also made it clear that if ambient ground water contaminant levels are elevated above guidance levels e.uitable for protecting ground water uses, these elevated levels would likely become the criteria to be met at points of compliance. It is likely that permit conditions which are predicated on elevated ambient concentrations will include an ambient monitoring requirement. Points of Compliance: 1. At operations where the potential to affect ground wafter quality exists, one or more points of compliance shall be •~stablished. Points of compliance are established in order to: evaluate protection afforded ground water quality, o comply with ground water standards; demonstrate compliance with permit conditions. 2. On a schedule approved by the DMG, an operator shall comply with ground water quality standards established by the Water Quality Control Commission at points of compliance. Where the Water quality Control Commission has not established standards, then permit conditions established by DMG or the Mined Land Reclamation Board shall be met at points of compliance, or as specie°ied in the approved permit. 3. For existing facilities, where ground water quality st~indards have been established, the points of compliance shall be established at some distance down-gradient from the source, and at t:he distance closest to the source considering technical feasibility, as follows: the down-gradient limit of contamination; the permit boundary;