GPI has a high level of expertise in the fields of environmental science, environmental planning, environmental assessment and remediation, and regulatory procedures including NEPA, Clean Water Act, and many individual State regulations. 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
  • Petroleum Storage Tank Management
  • Noise Modeling
  • Permitting & Regulatory Compliance
  • Phase I & II Assessments
  • Stormwater Management
  • Stream Restoration
  • Brownfields Consulting
  • Water Quality Monitoring & Analysis
  • Watershed Assessments
  • Wetland Assessments, Delineation, & Mitigation Design
  • Wildlife & Protected Species Surveys
  • Environmental Assessment and Remediation