Meet Our Team. The people of Iris Environmental have extensive experience in environmental consulting. Listed below are a few of our key team members; click on a name for more information.

Adrienne E. LaPierre, Principal and President

Practice Areas: Human Health Risk Assessment, Exposure Assessment, Toxicology, Risk Management, and Risk Communication

Phillip L. Fitzwater, Principal

Practice Areas: Hydrogeologic Characterization, Site Remediation, Brownfields Redevelopment, Environmental Compliance, and Representation before Regulatory Agencies

Nicholas T. Loizeaux, P.G., Principal

Practice Areas: Brownfields Redevelopment, Site Investigation and Remediation, Geologic and Hydrogeologic Site Characterization, and Hazardous Materials/Waste Management

Christopher S. Alger, P.G., C.E.G., C.HG., R.E.A., Principal

Practice Areas: Brownfields Redevelopment, Soil and Groundwater Remediation Pilot Testing and Treatment System Construction, Geologic Site Characterization, Engineering Geology and Geologic Hazards Mitigation

Robert B. Balas, Principal

Practice Areas: Regulatory Compliance Audits, Compliance System Development, Subsurface Fate and Transport, Emissions Estimation, Landfill Assessment, Dispersion Analysis, Proposition 65, and Exposure Analysis

Bita Tabatabai, P.E., Principal

Practice Areas: Soil and Ground Water Investigation and Remediation

Sandra H. Stevens, Principal

Practice Areas: Brownfields Redevelopment, Site Investigation and Remediation, Environmental Compliance, Hazardous Materials/Waste Management

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