The proficiency testing studies help improve quality and comply with regulations. Order the NSI PT Express™, our on-demand proficiency testing, when you have an immediate need for proficiency test results.

These environmental chemistry soil and hazardous waste proficiency tests are designed for identification of target chemicals in the soil and underground storage tanks (UST).

Environmental Chemistry Wastewater PT Express samples may take 7 to 10 business days to ship. If you need the samples sooner, please call NSI at 1-800-234-7837 to expedite your order.

Analyze for the following anions:
Bromide: 10.0 to 100 mg/kg
Chloride: 200 to 1000 mg/kg
Fluoride: 25.0 to 500 mg/kg
Nitrate as N: 25.0 to 500 mg/kg
Nitrite as N: 25.0 to 500 mg/kg
Sulfate: 25.0 to 2000 mg/kg
Orthophosphate as P: 25.0 to 500 mg/kg
Nitrate+Nitrite as N: 50.0 to 1000 mg/kg