Environmental remediation

2016 Remediation Goals and Performance Summary

GOAL

Effectively address environmentally impacted properties in compliance with applicable regulatory requirements. We continue to explore cost-effective alternatives to traditional resource-intensive remediation practices, which reduce environmental disturbance and energy use and promote ecosystem recovery.

We pursue this goal by seeking to work cooperatively with government agencies, conservation groups, citizen groups and other stakeholders to address environmental impacts at our remediation sites and protect human health.

PERFORMANCE

In 2016, we were involved in approximately 170 environmental remediation projects with an annual budget of $52 million. From 2006 to 2016, we successfully completed active remediation at 80 sites and removed them from the company’s portfolio of impacted properties. During the same decade, we also accomplished life-cycle cost reductions exceeding $44 million by using innovative engineering approaches.

For example, in Greenfield, Massachusetts bordering a site on the Green River, we excavated and removed approximately 3,500 cubic yards of hydrocarbon-impacted soils and sediments. We worked to return the site to pre-excavation conditions with clean fill and native rounded river stones, grasses and trees. Post–excavation samples indicate removal of free–phase hydrocarbons, reducing the potential for future impacts to the river and the ecosystem.

Thermal Remediation

In Murphy, North Carolina we implemented a thermal remediation program addressing volatile organic compounds (VOCs) in the soil and groundwater. These compounds are common in solvents used in de-greasing and other industrial processes. In less than one year, the thermal program reduced contamination to levels that could have taken previous remedial approaches more than 100 years.

We seek cost-effective and efficient solutions that reduce environmental impact.

Thermal remediation treatment systems at a former Northrop Grumman site in Murphy, North Carolina
Thermal remediation treatment systems, such as this one at a former Northrop Grumman site in Murphy, North Carolina, can reduce solvent levels in soil and groundwater.
Remediation construction efforts in Greenfield, Massachusetts showing the transformation.
Remediation construction efforts in Greenfield, Massachusetts showing the transformation.