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.

For determination of:
Benzene: 1000 to 10,000 µg/kg
Ethylbenzene: 1000 to 10,000 µg/kg
Toluene: 1000 to 10,000 µg/kg
MTBE: 2000 to 10,000 µg/kg
Naphthalene: 2000 to 10,000 µg/kg
Total Xylenes: 2000 to 20,000 µg/kg
m+p-Xylene: 1000 to 10,000 µg/kg
o-Xylene: 1000 to 10,000 µg/kg