GPI developed a high level of expertise in the fields of environmental science, environmental planning, and regulatory procedures following the passage of the National Environmental Policy Act (NEPA) and the enactment of the Amendments to the Water Pollution Control Act. With these in-house capabilities, we take our clients’ projects from the conceptual stage, through environmental hearings and permits, without costly delays and the need for major redesigns. As an acknowledged leader in the environmental field, GPI serves varying roles in the shaping of the nation’s infrastructure and quality of life.


  • Construction Monitoring
  • Environmental Impact Assessments & Technical Studies
  • Environmental Monitoring
  • Environmental Project & Design Review
  • Green Infrastructure
  • Noise Modeling
  • Permitting & Regulatory Compliance
  • Phase I & II Assessments
  • Stormwater Management
  • Stream Restoration
  • Water Quality Monitoring & Analysis
  • Watershed Assessments
  • Wetland Assessments, Delineation, & Mitigation Design
  • Wildlife & Protected Species Surveys