RJS Environmental Services
Stage 2 Preliminary Site Investigations

RJS Logo 06Oct2011

In most cases, a Stage 1 PSI is sufficient to assess the level of risk for contamination at a given site, and in most cases, the level is low and no further investigation is required. However, there are instances where contamination is suspected, and the investigation has to be taken to the next level. This is where a Stage 2 PSI comes into play.

A Stage 2 Preliminary Site Investigation (also referred to as a Phase 2 Environmental Site Assessment), is basically a Stage 1 PSI that involves soil and / or groundwater sampling and analysis. This is done in order to determine the extent of contamination and to characterize the type of contaminants present at the subject property.

A Stage 2 PSI is considered necessry if Areas of Potential Environmental Concern (APECs) are identified and are considered to pose a moderate to high risk of causing soil and / or groundwater contamination above applicable provincial standards.

Examples of cases that may trigger a Stage 2 include underground fuel oil storage tanks (USTs), existing or former service stations, dry cleaners, and auto mechanic shops. These may be on the subject site or located nearby. 

Stage 2 report includes:

  • Inspection and photographic documentation of the site and adjacent properties
  • Review of land use and permitting records
  • Analysis of historical air photos
  • Historical directory search
  • Interviews with knowledgeable sources
  • Sampling methodology and parameters for APECs
  • Material testing (soil and / or groundwater)
  • Laboratory analysis of samples taken
  • Results of samples compared to applicable soil and groundwater guidelines
  • Detailed report of results and recommendations including, if necessary, the need for further testing

If the site is found to be extensively contaminated, it may be necessary to proceed to a Stage 3 investigation, in which the extent of contamination is delineated, and remedial measures are undertaken.

In many instances, if for example a UST is removed and the surrounding soil is found to contain contaminants, the contaminated soil can be excavated and the soil retested until no further contamination is found. This eliminates the need for an expensive and time-consuming program to install monitoring wells.

  

 

For questions and estimates, please contact:

James Slater, B.A., B.Sc., R.P.Bio.
Principal, RJS Environmental Services

Phone: 604-732-5939
Cell:     604-828-6872

e-mail:  jim@rjsenvironmental.com

determine the degree of contamination and characterize the type of contaminant(s). - See more at: http://www.valhallaconsulting.ca/contaminated-sites-a-remediation/stage-2-psi--phase-ii-esa#sthash.BSmaW9hj.dpuf
determine the degree of contamination and characterize the type of contaminant(s). - See more at: http://www.valhallaconsulting.ca/contaminated-sites-a-remediation/stage-2-psi--phase-ii-esa#sthash.BSmaW9hj.dpuf
determine the degree of contamination and characterize the type of contaminant(s). - See more at: http://www.valhallaconsulting.ca/contaminated-sites-a-remediation/stage-2-psi--phase-ii-esa#sthash.BSmaW9hj.dpuf