| 5. Mitigation. The commissioner may take whatever action |
| necessary to abate, clean up or mitigate the threats or hazards |
| posed or potentially posed by an uncontrolled site or to protect |
| the public health, safety or welfare or the environment, |
| including administering or carrying out measures to abate, clean |
| up or mitigate the threats or hazards, and implementing remedies |
| to remove, store, treat, dispose of or otherwise handle hazardous |
| substances located in, on or over an uncontrolled site, including |
| soil and water contaminated by hazardous substances. When the |
| necessary action includes the installation of a public water |
| supply or the extension of mains of an existing water utility, |
| the department's obligation is limited to construction of those |
| works that are necessary to furnish the contaminated or |
| potentially contaminated properties with a supply of water |
| sufficient for existing uses. The department may finance |
| extensions of public water supplies to restore or replace water |
| supplies contaminated by hazardous substances when such |
| extensions are not the least costly alternative if extensions, in |
| the opinion of the commissioner, are practical. The department |
| is not obligated to contribute to a water utility's system |
| development charge, nor to provide works or water sources |
| exceeding those required to abate the threats or hazards posed by |
| the uncontrolled site. The department may pay the costs of |
| operation, maintenance and depreciation of the works or water |
| supply for a period not exceeding 20 years if funds are available |
| from Other Special Revenue or proceeds from the sale of bonds. |
| If a water supply well is installed after October 1, 1994 to |
| serve a location that immediately before the well installation |
| was served by a viable community public water system, and the |
| well is or becomes contaminated with a hazardous substance: |
