Jersey City, NJ
From the early 1900’s through the 1960’s, Jersey City, NJ had been the center for chromite ore processing. One of the by-products, Chrome Ore Processing Residue, or COPR, had been used as fill throughout the city. A component of COPR, hexavalent chromium Cr(VI), has been found to have adverse health effects on humans, especially when inhaled. Removal of COPR from multiple sites throughout Jersey City has been going on since the 1980’s. The excavation and removal of millions of tons of contaminated soil from multiple sites throughout the city needed to be accomplished without exposing the adjacent neighborhoods to potential airborne contaminants. While workers on the remediation sites wear protective clothing and air filtration equipment, local communities needed to be protected by other means. The two major corporations responsible for the cleanup have contracted with Emilcott Technologies to provide a solution. As Jersey City is densely populated and most remediation sites directly abutted roadways, retail, or residential properties, it was important to ensure none of the activities on the sites created dust beyond the perimeter.
Based on the concentrations of contaminants found in the soil, Emilcott Technologies calculated the maximum levels of dust (PM2.5 and PM10) that equates to the Permissible Exposure Limits (PEL) for hexavalent chromium. Real-time dust monitoring stations, integrated as part of the Greenlight Environmental Monitoring System, were deployed just within the perimeter of the sites. The Greenlight™ system allows for alerts and alarms to be set at multiple levels so site personnel could be notified of a possible increase in dust levels well before the PEL was reached. To further refine the analysis, weather stations were added to each site to integrate the wind direction and speed with the contamination levels. Mobile stations are regularly deployed closer to the remediation activity based on weather conditions and the type of work being done. To ensure all equipment was operating correctly, Emilcott manned the job-sites with a full time Air Monitoring Technician who regularly checks and calibrates each system. To further guarantee the reliability of the systems we provide remote monitoring of each station from our central station. Whenever dust levels increase to the alert levels, engineering controls are implemented at the site. These controls include applying water or foam to the area being excavated, hosing down trucks prior to leaving the sites, or in extreme cases, discontinuing operations until weather conditions are more favorable.
According to blood samples collected from residents near the remediation site - exposure prevention measures are working. No detectable changes in the levels of chromium were found. All data is sent to our cloud server and can be accessed and analyzed in real-time. The systems operate greater than 98.5% uptime.