Camden and Gloucester City, New Jersey
Welsbach/GGM used radioactive thorium to manufacture gas lamp mantles from the late 1800s to 1941. Thorium tailings were used to fill low-lying areas and provided sub-base and common fill for construction throughout the towns. Welsbach/GGM consists of multiple commercial and residential properties impacted with radiological contamination in soil and building materials. COCs include Ra-226, Ra-228, Th-230, and Th-232.
Over the course of Sevenson’s work at the Welsbach Site, spanning three contracts and task orders, Sevenson excavated, segregated, and disposed of 327,000 tons of radiologically contaminated soil and 61,000 tons of other waste. We met cleanup targets at 47 residential, three recreational, and 16 commercial properties (5 pCi/g above background). This project required multiple WWTPs, primarily 100-GPM plants, at various locations. Throughout the entirety of our work at the Welsbach Site, Sevenson treated and discharged 42M gallons of impacted water. For our successful and safe work at this Superfund Site, Sevenson received the 2012 NJ Governor’s Continued Excellence Award and CENAP Safety Award.