Section R. 560.414 - Primary maximum contaminant levelsRule 414.
(1) The department shall reject proposed development sites that are less than 1 acre in size and subdivisions if the water sample analysis detects contaminants in concentrations that exceed the primary maximum contaminant levels as defined in R 560.401(t).(2) The department shall reject proposed development sites that are less than 1 acre in size and subdivisions if the water sample analysis detects a contaminant in a concentration that is more than 50% of the maximum contaminant level and the department has determined that the contaminant is likely to exceed the primary maximum contaminant level in the future after considering the following: (a) Contaminant transport and modeling.(d) Other factors that influence groundwater movement.(3) If the department requires additional analysis under R 560.412(4), then the department shall use the drinking water regulations and health advisories adopted in R 560.413 to determine primary maximum contaminant levels.Mich. Admin. Code R. 560.414