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i~ compliance stations should be based on site-specific conditions and, in order to detect contamination from all potential sources, composed of single or combined contaminant streams. 3. Monitoring points should be placed as close downgradient of the contaminant sources as practical. In all cases, monitoring points should be sufficiently close to contaminant sources as to detect contaminant discharges very soon after such a discharge, and well within the projected life of the mine. 4. The compliance points should be downgradient of the monitoring points, should be within the permit boundary (even if an island outside the existing boundary), and should be sufficiently close to the monitoring points as to detect contamination well within the life of the mine. 5. Monitoring and compliance stations should be placed in the same aquifer or aquifers. 6. Where there is potential for contamination of more than one aquifer, the other aquifers should have established monitoring and compliance points. 7. Non-compliance with groundwater standards should be evaluated at the compliance point, not the monitoring point. 8. Natural dilution between monitoring and compliance points is acceptable for reaching compliance. 9. Groundwater use between monitoring and compliance points should be under the institutional control of the operator. 10. In anticipation of and in case of contaminant discharge, the operator should preclude use of contaminated groundwater between monitoring and compliance points until such contamination is mitigated. 13ased on in house discussions, it is not evident that the existing compliance point, at A-Pit, is actually down hydrologic gradient from the monitoring point at C-Pit. This should be verified, and a new compliance point established if A-pit does not fulfill the requirements described above. Nt is not evident that the likely travel time between C- and A-Pits is sufficiently short for C-Pit to qualify as a compliance point. This should be evaluated via a hydrological assessment or review of existing hydrologic information. Groundwater response plan In the event of an upset, there should be in place a groundwater response plan. In the present case, because the monitoring and compliance station actually comprise bodies of exposed water, the response plan should first consider exposure to wildlife. f-undamentally, the mitigation plan should include procedures for the following: a. Monitoring that records a possible excursion in monitoring parameter, indicating release of constituents in excess of permit conditions b. Confirmation sampling, to confirm the report of a possible exceedance. c. Response plan. d. Procedure for submitting a mitigation plan based in information gained through the response.