The standards include limitations for the land application of biosolids. The DNR incorporated the EPA standards into the state requirements under the Missouri Clean Water Law and regulations. The state rules also include additional requirements that are not covered in the EPA standards. Complying with state regulations automatically meets the EPA standards. The amount of metals and other pollutants in the biosolids determines the acceptability for land application and the appropriate loading rates to protect crops, soils and the environment.
Limitations consist of concentration-based limits and pounds per acre limits.
State guidelines for trace compounds also apply when an EPA standard has not been published for a specific pollutant. When necessary, it is permissible to mix the material with lower concentration biosolids or other suitable materials, such as sawdust, to meet the concentration limits. You may safely apply these biosolids for 100 years or longer at typical agronomic loading rates. Records are required for each application site. Biosolids low metal concentration.