Five Steps for Quality Assurance & Quality Control (QA/QC) in Groundwater Sampling
Groundwater Sampling Groundwater sampling and monitoring is a crucial component of the majority of subsurface remediation work. Walden addressed the topic of monitoring well (well) installation in a previous blog; well networks are strategically designed based on the...
What You Need to Know about the NYC MS4 Permit
On August 1, 2015, the New York State Department of Environmental Conservation (DEC) issued a new comprehensive Municipal Separate Storm Sewer System (MS4) permit to New York City. This permit includes new requirements, which significantly expand the city’s obligation...