Phase I / Phase II ESA’s

A Phase I Environmental Site Assessment (ESA) is an informational research report documenting the history of a property.  A Phase I ESA evaluates if current or historical property uses have impacted the soil or groundwater on or near a property, and if there are any recognized environmental conditions (RECs) connected with a property.

  • "Over the years, the GSS team has been a great business partner providing a high quality product, in a timely manner and they are always quick to answer questions." - NEPA and Phase I client

Phase I ESA – Process

  • Site inspection and evaluation of records searches, owner and occupant interviews, historical maps, construction drawings, and review of property title records, where available.
  • All Phase I ESAs are performed in compliance with the ASTM Standard E1527-21 (or most current version).
  • A completed Phase I ESA summarizes if or what concerns were identified on a property, and presents any recommendations about actions needed to address the concerns.
  • If a REC has been identified in connection with a property, a Phase II ESA might be warranted.
  • Phase II ESAs follow ASTM E1903-19 (or the most current version) to evaluate the presence or likely presence of hazardous substances, pollutants, or contaminants that were identified during the Phase I ESA.  The common scopes of work for a Phase II, include evaluation of soil, groundwater, or air/vapor samples.  The sample results are compared to applicable federal and state standards, and are then presented to the client to allow them to make informed decisions prior to leasing or purchasing a property.

Additional Services

NEPA / NHPA (Section 106)RSRAs