So, You Bought A Brownfield. Now What?
Brownfield Redevelopment What did I buy? Hundreds of thousands of brownfields are located across the county. Brownfields are properties formerly utilized for commercial, industrial, or manufacturing purposes that have resulted in an environmental impact to the Site....
Submit MS4 Annual Reports by June 1st
The State's Push for Clean Water Background The New York State Department of Environmental Conservation (NYSDEC) regulates stormwater discharge from Municipal Separate Storm Sewer Systems (MS4) in the New York metropolitan area and other urban and designated areas in...
Petroleum Storage Requirements: SPCC Plan for Spill Preparation
Spill Prevention, Control, and Countermeasure (SPCC) Plans All too often, facilities that store potentially hazardous chemicals are ill-prepared to respond to a leak or spill. In effort to protect the health and safety of site-employees and the environment, a...
Watch Bob LoPinto, P.E. Discuss NYSDEC Solid Waste Permits
New York State Permitted vs. Registered Solid Waste Facilities Have you been hearing about these new NYSDEC Part 360 changes, and are unsure if you are being affected? Watch this short video of Walden's Robert LoPinto, P.E. who will explain the basis of who will need...
Soil Vapor Intrusion Solutions – Sub-Slab Depressurization System
How to Address Soil Vapor Intrusion Discussed in a previous blog (link at the bottom of the page), subsurface contamination can find its way into habitable buildings via minor breaches in a building’s foundation and/or flooring. Source area removal, or direct removal...
Update: Long Island’s 1,4-Dioxane Issue
Cancer-causing Chemical Is Present in Long Island Groundwater and Drinking Water Samples Last year, New York State officials initiated a plan to sample groundwater at all New York State (NYS) Superfund sites on Long Island for the presence of the carcinogen,...
PFOS Contamination is Back in the News – Now, on Long Island
Suspected MacArthur Airport Groundwater Contamination Islip, NY Recent PFOA and PFOS Contaminant History Poly- and Perfluoroalkyl substances (commonly referred to as PFOA’s and PFOS’s) were a hot-topic issue in 2017. On March 3, 2017, 6 NYCRR Part 597 was amended to...
New Part 361-4 Solid Waste Regulations Affect Mulch Processing and Storage Facilities
Mulch Processing and Storage Facilities Under the Newly Amended Solid Waste Regulations Does your facility create or store mulch which has been derived from tree debris, yard trimmings or other woody material? If so, updated regulations will require the facility to...
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...
Key Stormwater Permit Requirements for Vehicle Dismantling Facilities
Stormwater Regulation Updates Affect Auto Salvage Businesses If you own or operate a Vehicle Dismantling Facility-- a business that disassembles or wrecks used motor vehicles for parts recycling, resale, or scrap-- please note that you must conform to multiple New...