Former Manufacturing Site Remediation

Kearney-KPF manufactured high-voltage switching devices for utility companies on a site in Stockton for close to 40 years beginning in 1951. Presently, the site is used for trucking, equipment storage, auto repair, and construction, and includes 10 buildings.

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Project Facts
  • Kearney-KPF
  • Stockton, California
  • Project work is ongoing
  • 30+ years’ experience on the site
  • 12.6-acre site

The Challenge

For more than 30 years, liquid wastes from two manufacturing processes—silver plating and galvanizing—were disposed of in shallow ponds on the site. Disposal was suspended in 1985 in order to perform soil and groundwater investigations, which revealed high levels of heavy metals and volatile organic compounds. The site was sold in 1999 and now comprises many different businesses. Ongoing cleanup efforts are sometimes hampered by tenant activities.

The Solution

Our team performed subsurface investigation, installed engineered cover on shallow ponds, established a remedial well field and treatment system, and installed and performed quarterly sampling of more than 40 groundwater monitoring and extraction wells. We also prepared, designed, and implemented a remedial action plan for the collection and treatment of contaminated groundwater, and reinjection into the aquifer. The DTSC recently approved the site’s RCRA Hazardous Waste Facility Post Closure Permit for a further 10 years. We also negotiated a reduced monitoring and treatment schedule with DTSC, as well as a clear path to achieving Detection Monitoring status for the site.

The Impact

There are now no traces of contamination in the site’s deep aquifer, and lateral impacts are limited to a small area within the site boundary. This project exemplifies the power of sustained collaboration; active client involvement and long-term engagement guaranteed consistent progress and efficient execution, driving cleanup efforts forward with precision and purpose.

Remediation Transformation

Years of expert remediation turned a contaminated manufacturing site into a thriving industrial hub.

What We Did

Our multidisciplinary specialties allow us to provide efficiencies that maintain project momentum.

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