Tag: Western Cleaner & Launderer

Can PERC Releases Be Age Dated and Fingerprinted?

Posted on by Jeff Carnahan

Written by Stephen Henshaw, P.G., President and CEO, EnviroForensics
As seen in the May 2010 issue of Cleaner & Launderer

PDF Version

For years parties responsible for the costs associated with environmental investigations and cleanups of Perc contamination have been trying to determine when Perc releases have occurred.  This topic has important ramifications when sites have had a series of dry cleaning operations over time, when different insurance carriers insured dry cleaners and property owners, and when several dry cleaning releases have comingled together from different dry cleaning locations.

So, for the past 15 to 20 years, scientists like Dr. Konrad Banaszak with EnviroForensics, have been trying to figure out how to age date PERC releases.  So, can Perc releases be accurately age dated?  The answer is yes, no and maybe.  Continue reading “Can PERC Releases Be Age Dated and Fingerprinted?”

Conducting Site Characterizations

Posted on by shenshaw

Written by Steve Henshaw, P.G., President & CEO, EnviroForensics

As seen in the February 2009 Western Cleaner & Launderer

PDF Version

In past articles, we discussed the difference between Phase I and Phase II investigations.  A Phase I generally refers to a due diligence evaluation that address the past land uses of a property or group of properties.  A Phase II generally includes an initial or preliminary investigation to determine whether or not the soil, soil gas or groundwater beneath the subject site is contaminated with metals, petroleum hydrocarbons, chlorinated hydrocarbons (solvents) or other chemicals of concern, based on the past land uses.

Continue reading “Conducting Site Characterizations”