Section R. 325.1637a - Verification of well groutingRule 137a. Where the department or health officer determines that any of the following conditions exist, the well drilling contractor may be required to excavate the well head for inspection:
(a) A visible open annular space surrounding a well casing.(b) Failure to detect, using a soil probe, excavation, geophysical logging, or other methods, grout 2 feet or more below the water service line connection to the casing.(c) Placement of tracer dye around the casing at or near the ground surface with subsequent detection of the dye in the well water.(d) Receipt of a well log which indicates that the well has not been grouted or which lacks information or contains incomplete information pertaining to grouting of the well.Mich. Admin. Code R. 325.1637a