Water Quality Monitoring Section staff sample groundwater at solid waste disposal facilities to determine if these facilities are causing adverse effects on the physical, chemical or biological attributes of groundwater. Deterioration of water quality can cause detrimental effects such as human or animal health impacts, vegetative stress or other environmental problems. Water Quality staff split groundwater well samples with the facilities’ sampler as a means to detect contamination and provide a quality assurance check against routine sampling that is conducted by active and closed solid waste disposal facilities in Missouri. The Missouri Department of Natural Resources' environmental laboratory analyzes samples collected by staff and sends spiked samples to contract laboratories analyzing groundwater samples for further quality assurance of sample analyses.

Groundwater: The Hidden Resource

Groundwater Monitoring

Guidelines for Soil and Groundwater Sampling - Brownfields/Voluntary Cleanup Program--PUB2432

Collection, Handling and Reporting Procedures for Groundwater Samples, Fact Sheet--PUB181

Many solid waste disposal facilities must monitor for the presence of methane soil gas to determine if methane is migrating across property lines in concentrations that may cause concern for public health and safety on properties adjacent to the landfill. Possible effects of methane gas migration include dead or stressed vegetation and explosion hazards in buildings. Water Quality staff evaluates the soil gas monitoring methods of multiple landfills each year. They also perform side-by-side sampling using the GEM™-2000 landfill gas monitor at multiple wells as a means to detect possible gas migration and provide a quality assurance check against routine monitoring conducted by the facilities. The information generated by this activity is used to help landfills better monitor the presence or migration of soil gas.

Landfill Gas, Fact Sheet--PUB2370

Maintaining a Closed Landfill, Fact Sheet--PUB2431

Missouri Landfills with High Methane Levels

Permitted Facilities

Requirements and Considerations When Selling or Buying a Landfill, Fact Sheet--PUB2429