Administrative Rules of Montana
Department 17 - ENVIRONMENTAL QUALITY
Chapter 17.50 - SOLID WASTE MANAGEMENT
Subchapter 17.50.13 - Ground Water Monitoring and Corrective Action
Rule 17.50.1312 - MONITORING WELL ABANDONMENT
Universal Citation: MT Admin Rules 17.50.1312
Current through Register Vol. 18, September 20, 2024
(1) The owner or operator of a solid waste management facility shall:
(a) completely seal all abandoned borings, water
supply wells, and monitoring wells with grout or bentonite to prevent future
contamination of ground water. The sealing materials must be continuous, physically
and chemically stable, and have a hydraulic conductivity of less than 1 x
10-5cm/sec;
(b) immediately abandon, after drilling and
completion of soil testing, all boreholes not completed as a monitoring well,
piezometer, or water supply well;
(c)
for any borehole deeper than the well to be placed in it, seal with bentonite
pellets or a bentonite slurry the portions of the borehole below the well screen;
and
(d) conduct all abandonment
activities in accordance with ARM
36.21.670 through
36.21.678 and
36.21.810.
75-10-204, MCA; IMP, 75-10-204, MCA;
Disclaimer: These regulations may not be the most recent version. Montana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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