Environmental Assessments, Management & Compliance

An environmental assessment can consist of several phases, with the scope of each phase dependent on previous results and your needs. The assessment phases can include:

• Phase I - Environmental Site Assessments
• Phase II - Contamination Assessments
• Phase III - Remedial Investigation and Design
• Phase IV - Cleanup Execution

Phase I - Environmental Site Assessments
A Phase I environmental site assessment (PESA) is a noninvasive study designed to evaluate the potential environmental hazards and liabilities associated with a property. A PESA involves an evaluation of past property usage, a review of federal and state environmental regulatory lists to determine if the property or nearby properties are known to be contaminated, an assessment of the hydrogeologic setting of the property, and a site visit and visual reconnaissance of the property to observe possible environmental concerns.

Phase II - Soil and Groundwater Contamination Assessments
A Phase II contamination assessment is recommended if concerns of potential environmental conditions are revealed during the Phase I. A Phase II typically involves sampling and testing of soil, ground water or surface water. The analytical results provide baseline data and, if significant contamination is found, an iterative process is begun to determine the type/s and extent of contamination present.

Phase III - Remedial Investigation and Cleanup Method Design
The third phase of activity may involve a remedial investigation and feasibility study to identify and select cleanup alternatives. The extent and degree of contamination defined in the Phase II is used to design a cost-effective cleanup operation. The cleanup options generally include:

• Removal of contaminants to an approved landfill or treatment facility
• In-place treatment
• Encapsulation or fixation
• Offsite treatment

Phase IV - Cleanup Execution
The fourth phase involves execution of the selected cleanup method. MACTEC provides turnkey contracting services for environmental remediation and site restoration. Services include quality control monitoring, health and safety monitoring, field sampling, report preparation, construction monitoring of contractor cleanup activities, verification sampling and cleanup documentation.