Whether you need a Phase 1 ESA or one of the many different environmental services we offer, you’re in the right place.

We are trusted by both major corporations and government entities for their environmental services and have been for nearly 40 years.

GPI – an environmental consulting firm in Phoenix, AZ serving the entire greater Phoenix area that is a leader in quality, cost, service and customer satisfaction – finds solutions to tough environmental regulatory compliance issues for major corporations and federal installations, such as:

NXP USA, Inc.  (Formerly Freescale Semiconductor)

ON Semiconductor



Principal Real Estate Investors

The Air Force Center for Environmental Excellence

U.S. Army Yuma Proving Ground.

GPI’s capability as an environmental consulting company to provide environmental consulting services includes:

Conducting site characterizations


Identifying potential environmental impacts of planned operations


Monitoring and protecting valued resources.

GPI’s environmental services include (but are not limited to):

  • Water Quality Sampling, Soil Testing & Sampling & Air Sampling
  • Lead-Based Paint Inspections
  • Asbestos Inspections
  • Mold Inspections
  • Phase I and Phase II Environmental Site Assessments
  • Remedial Investigations/ Feasibility Studies
  • Plans and Specifications
  • Facility Operation & Maintenance
  • Well Maintenance & Sampling
  • Confined Space Entry