About RTC
  • Certified Reference Materials
  • Quality Control Standards
  • Proficiency Testing Standards
  • Calibration Standards
  • Custom Standards
We provide proficiency testing for water supply, water pollution, Resource Conservation and Recovery Act, and Discharge Monitoring Report-Quality Assurance.
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Holiday Season Closures

Tuesday, October 22, 2013

Our offices will be closed December 24-27 and December 31-January 1. Limited customer support will be available during these times.

More News
February 01 - Ordering and Billing
February 08 - RTC joins the Sigma-Aldrich family
February 08 - Business as Usual
June 24 - New GHS Labels