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Sub-Slab Depressurization Systems – A Brief Overview

Posted on May 29th, 2014

Existing buildings over groundwater and residual soil contamination can often affect indoor air quality, or a “vapor concern.” Mitigation of a vapor concern can include excavation and removal of contaminated soil from the site; however, this is often not possible or practical....more


Passage of the May 7, 2014 RIR Deadline!

Posted on May 15th, 2014

JMS is pleased to report that it has successfully submitted a Remedial Investigation Report or completed the extension request for all of its cases that were subject to the May 7, 2014 deadline....more


Glaciers, New Jersey and what it means for the Spread of Contamination

Posted on May 14th, 2014

Roughly 30% of the state (most of the northern portion) was carved out by glaciers during the Pleistocene Epoch, with the last period of glacier advance occurring during the Wisconsin Glaciation (starting roughly 80,000 years ago). This glaciation reached its furthest point in New Jersey approximately 18,000 years ago and did not recede until nearly 11,000 years ago. During this time period, glaciers covered much of northern New Jersey, carving New Jersey’s ridges and valleys out of the bedrock and leaving behind a complex system of glacial deposits and moraines. These glacier deposited sediments are characterized by grain sizes ranging from clay to boulders, containing water producing and non-water producing zones, as well as confining and non-confining layers. The composition and thickness of these glacial deposits varies throughout the region and can affect the distribution and spread of contamination....more


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