If a pollutant in biosolids surpasses a certain threshold, it is required that the lifetime amount of that pollutant is tracked on that field. If any pollutant exceeds the amount in the table below, land application of those solids is forbidden. This is also referred to as Table 1 of R 323.2409(5)(a):
PollutantCeiling Concentration in milligrams per kilogram (on a dry weight basis) Arsenic75 Cadmium85 Copper 4300 Lead840 Mercury57 Molybdenum75 Nickel420 Selenium100 Zinc7500