1.1                          A bill for an act 
  1.2             relating to the environment; modifying groundwater 
  1.3             protection provisions; amending Minnesota Statutes 
  1.4             2002, sections 103H.005, subdivision 11; 103H.201, 
  1.5             subdivision 1. 
  1.6   BE IT ENACTED BY THE LEGISLATURE OF THE STATE OF MINNESOTA: 
  1.7      Section 1.  Minnesota Statutes 2002, section 103H.005, 
  1.8   subdivision 11, is amended to read: 
  1.9      Subd. 11.  [POLLUTANT.] "Pollutant" means a chemical or 
  1.10  substance ~~for which a health risk limit has been adopted~~ that 
  1.11  causes or contributes to degradation of groundwater. 
  1.12     Sec. 2.  Minnesota Statutes 2002, section 103H.201, 
  1.13  subdivision 1, is amended to read: 
  1.14     Subdivision 1.  [PROCEDURE.] (a) If groundwater quality 
  1.15  monitoring results show that there is a degradation of 
  1.16  groundwater, or the commissioner determines that there is a 
  1.17  possibility that a new chemical has the potential to degrade 
  1.18  groundwater, the commissioner of health may promulgate health 
  1.19  risk limits under subdivision 2 for substances degrading the 
  1.20  groundwater.  
  1.21     (b) Health risk limits shall be determined by two methods 
  1.22  depending on their toxicological end point.  
  1.23     (c) For systemic toxicants that are not carcinogens, the 
  1.24  adopted health risk limits shall be derived using United States 
  1.25  Environmental Protection Agency risk assessment methods ~~using a~~ 
  2.1   ~~reference dose, a drinking water equivalent, and a relative~~ 
  2.2   ~~source contribution factor~~.  
  2.3      (d) For toxicants that are known or probable carcinogens, 
  2.4   the adopted health risk limits shall be derived from a 
  2.5   quantitative estimate of the chemical's carcinogenic potency 
  2.6   published by the United States Environmental Protection Agency 
  2.7   or by another state or federal government agency and determined 
  2.8   by the commissioner to have undergone thorough scientific review.