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Environmental Quality Assurance Program

Stone’s consulting services in environmental quality include data interpretation and evaluation, litigation support, data validation, and quality assurance/quality control. Stone's personnel have experience performing quality assurance functions while collecting samples in the field, and during laboratory analysis.

Data Validation

Data Usability and Data Validation is a critical process of assuring data is of known quality, reproducible and compliant with regulatory standards. Stone validates laboratory analytical data packages for water, soil, air, solids, and biota matrices for parameters including:

  • Volatile organic compounds
  • Semivolatile organic compounds
  • Pesticides
  • PCBs and their congeners
  • Metals / cyanide
  • Dioxins / furans
  • Classical wet chemistry analytes
  • Isotopic and selective ion monitoring
  • Performance-based methods

We conduct validations pursuant to current US EPA National Functional Guidelines, as well as EPA regional guidance documents, laboratory standard operating procedures, and analytical methodologies such as Contract Laboratory Program Statements of Work and SW-846.