Solids & BiosolidsGet in Touch
Our laboratory is accredited to test solids, sludges and biosolids for a range of metals, organisms, and organic chemistry matter. The analyses carried out on soils are often used for land contamination assessment, landfill/clean fill criteria acceptance, environmental monitoring, resource consent compliance, and one-off projects.
Biosolids are sewage sludges that have been treated and stabilized. Once the appropriate testing has been carried out, these biosolids can be safely applied to land and used as a fertilizer. Biosolids often contain a variety of micro-nutrients such as nitrogen and phosphorus, along with metals, calcium, magnesium, and potassium that are beneficial for plant growth.
It is important to monitor biosolids as if applied in excessive amounts, some of these elements can cause damage to plant or animal health. There are also potential pathogenic micro-organisms such as viruses, helminths, and protozoa and health risks to be aware of.
Solids - what do we test for?
TCLP (Toxicity Characteristic Leaching Procedure)
SPLP (Synthetic Precipitation Leaching Procedure)
Total organic carbon
Organic contaminants (SVOC, VOC)
Pesticides and herbicides
Hydrocarbons (PAH, TPH)
Biosolids - what do we test for?
Helminths, adenovirus, enteric virus etc
Nutrients (Nitrogen and Phosphorus)
Related Testing Services
Microbiological food testing (Invercargill only)
Testing of meat, fish, food, and environmental swabs. Most tests carried out are to ensure the safety of foods for export and selling on the local market.Learn
We are IANZ accredited for shellfish and crustacean testing and have experience testing for biological materials.Learn
Solids and biosolids
Our laboratories are accredited to test solids, soils, sludges and biosolids for a range of metals, microorganisms, and organic chemistry matter.Learn