environmental site assessment (ESA)
Phase I Site Assessment
An Environmental Site Assessment (ESA), also known as Phase I Site Assessment, is a "due diligence" study of a particular site which is usually required by lending institutions or current property owners. An ESA is needed to identify potential environmental concerns on properties which may be used as "collateral" for loans or has been under a leased agreement by a third party. The objective of an ESA is to identify obvious, actual and potential sources of contamination that, by their association with the subject property, could become an environmental liability. The scope of work included in an ESA consists of an on site investigation of the subject property and surrounding adjacent property through visual observation, aerial photographs, historical review, review of regulatory agency information and the presence of absence of asbestos containing building materials.
Phase II Site Exploration
A Subsurface Investigation, also known as a Phase II Site Assessment, is required to assess the potential for soil and/or water impacts on or beneath the land surface to document the presence or absence of EPA regulated substances. Sources of such contaminants include underground storage tanks (USTs), above ground storage tanks (AST), illegal dumping and accidental surface spills. A mobile drill rig and direct push (Geoprobe ®) equipment are utilized to advance boreholes into the native soil for collecting soil/water samples for laboratory analysis. Based on the results of the laboratory analysis, the client will receive a detailed report revealing the potential source of contaminants, allowable limits of each identified chemical, recommendations regarding agency notification and the next step for appropriate corrective action response.
Phase III Environmental Site Remediation & Clean-up
ASTEM combines geotechnical and hydrogeological capabilities to minimize, mitigate & clean-up a variety of pollutants and contaminants.
These include defining the extent and magnitude of the pollution sources and developing groundwater extraction and treatment, ground water gradient controls and disposal of waste contaminants.