FORMER CHROMIUM ALLOY AND RADIOLOGICAL SUPERFUND SITE

ENTACT executed a four-phased remedial action project to support the decommissioning of a former glass and super alloy additives manufacturing facility. The site, due to historical metallurgical operations, exhibited metals and radiological contamination in soil and sediment both on-site and in adjacent areas, including wetlands, a stream channel, and wooded uplands. The project phases were designed to systematically address the impacted materials, as outlined below:

Phases 1 and 2 Remediation
The initial phases focused on materials within the property limits. Our team:

• Excavated the stream channel, adjacent banks, and floodplain totaling 6,540 cubic yards over a seven-acre area
• Performed onsite material transport, handling, storage, conditioning, and loadout
• Imported and placed 4,940 cubic yards of select fill and 1,600 cubic yards of highly organic select fill that met site-specific sediment ecological screening values
• Installed and operated an active stream bypass to manage water flow during remediation
• Constructed water dewatering, treatment, and discharge systems
• Restored wetlands through plantings, seeding, and mulching
• Installed a one-acre asphalt cap to seal the remediated area

Phases 3 and 4 Remediation
During phases three and four, we addressed off-site impacts across a six-acre area. To do this we:

• Imported and placed 1,305 cubic yards of select fill and 2,655 cubic yards of highly organic select fill

Ancillary Support Tasks
Throughout the project, ENTACT further supported the project by performing ancillary tasks. Our Associates:

• Surveyed and maintained site controls to ensure safety and compliance
• Procured local permits required for the project
• Conducted air monitoring to assess and manage environmental conditions
• Implemented dust control measures to protect air quality
• Installed, maintained, and removed soil erosion and sediment controls
• Constructed and improved site access roads to facilitate operations