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- 2.3 -
Site Prioritization

  Because of the large number of sites identified (53) a prioritization scheme was developed based on selected criteria that were considered potentially relevant human exposure factors. These factors were selected to provide objective criteria that could be used by DNREC for assigning resource priorities and identifying any necessary action. Prioritization is provided herein only as one of several possible approaches for recommending a "next step" for the sites identified, and is not intended to represent the views of any agency of government; rather it represents Tetra Tech's professional judgment supported by site observations. This prioritization scheme represents a qualitative comparison of observed site characteristics, and is not intended to be a substitute for a quantitative assessment of risk.

Four separate factors guided our prioritization scheme based on potential exposure. These were:

  • Observed presence of children on-site or in the immediate area.
  • Exposed soil on the site.
  • Land use on the site and surrounding area, particularly residential and recreational/open space.
  • Current DNREC site status.

  These factors were considered in the order presented, with the exception of known DNREC sites that were automatically deferred to the lowest priority because they are the subjects of ongoing or completed investigation/remediation efforts. Based on the presence of these factors, sites were classified into one of four priority levels.



Priority Levels


  • Initial Action, characterized by children observed/suspected on or near the site, with areas of exposed soil.
  • Early Action, located either: near where children play; or residential areas with some areas of exposed soil and/or grass/mulch.
  • Later Action, generally not immediately adjacent to residential land, with some areas in grass or mulch and possibly exposed surfaces.
  • Future Action, including areas which are almost entirely paved or far-removed from residential exposure with little possibility of children coming into contact with the soil, or current DNREC sites.

  Although this prioritization system follows a strict methodology, it is subjective in nature and should not in any way be considered a static ranking. New information will become available and should be incorporated into the prioritization, particularly from sampling results that could establish a quantifiable justification for more in-depth investigations.

Section 3: Findings