Call Us: (800) 419-4923
 Call Us: +44 (0)20 3865 7701
 Call Us: (787) 822-8377
 Call Us: (437) 855-4925
Partner Engineering and Science, Inc.
Partner Engineering and Science, Inc.
You are here: Home » Resources » Articles » The Phase 1’s Ugly Stepsister – The Phase 2 Subsurface Investigation

July 31, 2012

The Phase 1’s Ugly Stepsister – The Phase 2 Subsurface Investigation

By Jenny Redlin, REPA

The Phase 2 Subsurface Investigation Is Sometimes the Dreaded Next Step

Meet the Phase 2 Environmental Site Assessment—she’s the dreaded next step after the Phase 1 ESA. She’s got a bit of a bad rap for being a pain, a roadblock, too expensive, and maybe even a deal breaker.

So what exactly does a Phase 2 Environmental Site Assessment entail? Does it really live up to its reputation?

Phase 2 Environmental Testing involves soil, soil-gas, and/or groundwater sampling and analysis. It’s not a blind search and does not require “Swiss cheesing” the entire property by poking holes all over the place. A Phase 2 Environmental is a very targeted assessment of only the specific Areas of Concern and Chemicals of Concern discovered in the Phase 1 ESA report. For example, at a former gas station property where the tanks were removed without proper documentation and testing, we will sample just in the vicinity of the former tanks, and only for the chemicals that were reported or likely to have been stored in those tanks (petroleum hydrocarbons and gasoline additives such as BTEX and MTBE). This helps to keep the scope of work very focused and cost-effective.

If contamination is found during the Phase 2 Environmental Report, our clients want to know “How big is it?”. Because Phase 2 is so streamlined and serves only to answer the question “Is there or is there not a release of hazardous materials at the site?”, it may not address the full extent of the problem. Depending on the levels of contamination, more comprehensive sampling and analysis may be required to completely delineate the extent and depth of the contamination, in other words, to answer the question “How big is it?”. Or, if an unexpected contaminant is identified then further investigation might be warranted to identify the source. This can take the form of sampling deeper and wider (think of it as trying to draw a sphere around the release), sampling additional media (soil, soil gas, groundwater), sampling in more places, or analyzing for additional chemicals. This is often called Site Characterization or a “Phase 3”. Sound ominous? It can be, but it can be extremely helpful in determining a Remedial Cost Estimate.

Continue reading the GlobeSt blog here.

Other Resources You Might Like

Let us be your Partner

Learn how we can support your next project or share insights via our newsletter.
crossmenuarrow-up linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram