An increased public awareness of environmental contamination has resulted in recent legislative changes to the way councils operate and plan the disposal of solid and liquid waste
These changes have resulted in a greater emphasis on waste minimisation needs as well as for the need to closely monitor the environmental impact of current and closed landfills.
The management of solid waste disposal is a high priority for councils and environmental engineers around the world, and we are ideally placed to provide the analytical needs of these systems. Through our own laboratory and our partners we offer a comprehensive range of surface, groundwater and leachate analyses including:
- Full microbiological suite
- Low level metals analysis
- Low level nutrient analysis
- Full Organic analyses
Landfill analyses is based on Ministry for the Environment criteria and can vary between locations. We operate a wide range of equipment and test methodologies, capable of meeting all the required parameters.
Several leaching procedures are available to evaluate metals mobility. Two of the more frequently used procedures require that solid waste be mixed with the appropriate extraction fluid and tumbled for 18 hours in a rotary agitator. The liquid is filtered and then analysed for metals. Please refer to our metals brochure for more details on this technique.
Toxicity Characteristic Leaching Procedure
The most commonly used EPA Method 1311, Toxicity Characteristic Leaching Procedure TCLP), evaluates metal mobility in a landfill. The extraction simulates a worst case scenario where the waste is co-disposed with municipal solid waste.
Synthetic Precipitation Leaching Procedure
EPA Method 1312, the Synthetic Precipitation Leaching Procedure (SPLP) is used to evaluate the potential for leaching metals into ground and surface waters. This method provides a more realistic assessment of metal mobility under actual field conditions, i.e. what happens when it rains (or snows). The extraction fluid is intended to simulate precipitation. The SPLP is a method of choice when evaluating fate and transport of metals in a properly engineered wasteland disposal facility from which municipal solid waste is excluded.