NAC444.7488. Program for detection monitoring.

     1. Except as otherwise provided in subsection 2, all constituents listed in Appendix I or in the list of alternative parameters established pursuant to NAC 444.7487 must be monitored at least semiannually during the active life of a municipal solid waste landfill unit, including the period of closure and postclosure. At least four independent samples from each background and downgradient well must be collected and analyzed for the constituents during the first semiannual sampling. At least one sample from each background and downgradient well must be collected and analyzed during subsequent semiannual sampling.

     2. The solid waste management authority may specify an appropriate alternative schedule for monitoring constituents listed in Appendix I or the list of alternative parameters. The alternative schedule may require monitoring not less than annually. The alternative schedule must be based on the:

     (a) Lithology of the aquifer and unsaturated zone;

     (b) Hydraulic conductivity of the aquifer and unsaturated zone;

     (c) Rate of flow of groundwater;

     (d) Minimum distance between the upgradient edge of the municipal solid waste landfill unit and downgradient monitoring well screen; and

     (e) Resource value of the aquifer.

     (Added to NAC by Environmental Comm’n, eff. 11-8-93)