Founder and president of MacStat Consulting, Ltd. in Colorado Springs, a statistical consulting firm specializing in environmental statistical applications and problem solving. First served as a consultant to EPA beginning in 1990, while working for Science Applications International Corporation (SAIC) in Northern Virginia. Currently consulting to EPA, DoD, DoE, the US Air Force, state agencies, and private environmental and medical firms.
Environmental Statistical Highlights:
- Wrote an extensive addendum to EPA's Interim Final Guidance document for the statistical analysis of groundwater monitoring data in 1992. Served as principal author of EPA's Unified Guidance, published in 2009.
- Design and present training courses on the statistical analysis of groundwater monitoring data to regulators, consultants, and environmental professionals around the country. Also filmed a commercial videotape training series on groundwater data analysis.
- Wrote a guidance document for EPA on the geostatistical analysis of soils data. Emphasized techniques for balancing sampling costs against uncertainty in geostatistical studies.
- Developed a geostatistical and statistically-based scheme (Geostatistical Temporal-Spatial optimization algorithm or GTS) for the US Air Force to optimize sampling frequencies and locations at sites undergoing long-term groundwater monitoring (LTM). Awarded an ESTCP grant (Dept of Defense) to convert the optimization algorithm into public domain software and to test its usability. The GTS software is publicly available from the Air Force Center for Engineering and the Environment (AFCEE).
- Provide review, statistical design, and analysis of groundwater monitoring programs at RCRA hazardous waste sites across the country. Also provided consultation, review, and expert design help for statistical software packages tailored for analysis of groundwater monitoring data, including Sanitas (www.sanitastech.com) and EPA's previously supported Groundwater Information and Tracking System (GRITS/STAT).
- Developed statistical sampling and analysis guidance for EPA in connection with the formerly proposed Hazardous Waste Identification Rule (HWIR-media) for corrective action. Also re-wrote statistical portions of a 1999 draft revision to Chapter 9 of EPA's Test Methods for Evaluating Solid Waste, SW-846, particularly with respect to statistical testing techniques and computing minimum sample sizes.