Lead, PCB & Arsenic Soil Remediation in California
Encon Environmental designs and implements remediation programs for lead, PCBs, arsenic, and related contaminants in soil at commercial, industrial, and redevelopment properties across California.
We combine targeted investigations, remedial excavations, and risk-based cleanup strategies to address high-priority areas, support construction and real estate objectives, and meet California regulatory expectations.
- Identification and delineation of metal and PCB-impacted soil.
- Remedial excavations and off-site management of contaminated soil.
- Risk-based cleanup levels aligned with future use and agency guidance.
Managing Lead, PCB & Arsenic in Soil at California Properties
Lead, PCBs, and arsenic are common concerns at older industrial, commercial, and urban infill properties, particularly where historic fill, rail, utility, or manufacturing activities have occurred.
Encon evaluates site history, existing Phase II data, and regulatory directives to define where these contaminants are present and how they relate to current and planned land use. We work with owners, developers, and agencies to determine practical cleanup goals and appropriate remedial approaches.
At many sites, targeted remedial excavations can be used to remove the most highly impacted soil, while risk-based management or engineered controls address broader, lower-level impacts.
- Historic lead-based paint along building exteriors and drip lines.
- Former transformer pads, electrical equipment, and PCB-containing oils.
- Fill materials from rail, industrial, or urban sources.
- Metalworking, plating, and former industrial process areas.
- Past pesticide or wood-treatment operations in certain land uses.
Investigation, Delineation, and Risk-Based Cleanup Levels
Effective remediation begins with understanding where contaminants are and at what concentrations. Encon designs soil sampling programs to delineate horizontal and vertical extents of lead, PCB, and arsenic impacts, often building on existing Phase II or soil and water testing data.
Data are compared to applicable screening levels and risk-based criteria used by California agencies. Where appropriate, we coordinate with Health Risk Assessment and workplan development efforts so that cleanup levels reflect both regulatory guidance and the planned future use of the property.
This approach helps avoid over-excavation while ensuring that residual conditions are consistent with long-term objectives for the site.
- Grid or decision-based soil sampling in accessible areas.
- Targeted sampling near buildings, pads, and former equipment locations.
- Screening against residential, commercial/industrial, or site-specific criteria.
- Development of a conceptual site model for metals and PCBs.
- Recommendations for excavation limits and/or engineered controls.
Remedial Approaches: Excavation, Treatment, and Engineering Controls
Once cleanup goals and excavation limits are defined, Encon develops and implements soil remediation programs that fit the site’s layout, schedule, and budget. In many cases, remedial excavations are used to remove the most impacted soil, with material transported off-site for treatment, incineration, or disposal at appropriate facilities.
For broader, lower-level impacts, we may recommend a combination of excavation, on-site regrading, clean soil capping, or other engineering controls that reduce exposure while supporting construction and long-term use.
Throughout implementation, Encon coordinates confirmation sampling, documentation, and communication with agencies so that the remediation record clearly supports closure or continued use decisions.
- Targeted remedial excavations in high-concentration areas.
- Off-site management of contaminated soil at approved facilities.
- Placement of clean backfill and construction of soil caps.
- Integration with bio-remediation, chemical injection, or vapor controls where relevant.
- Development of operations and maintenance plans for engineered controls.
Supporting Real Estate, Construction, and Redevelopment in California
Lead, PCB, and arsenic soil issues commonly intersect with real estate and construction timelines. Encon’s remediation plans are developed with these practical drivers in mind, aligning excavation windows, stockpile management, and backfill activities with your overall project schedule.
We provide clear documentation—figures, tables, manifests, and narrative reports—that can be shared with buyers, lenders, building departments, and California agencies to support entitlements, financing, and occupancy milestones.
Where sites are part of larger portfolios, we can help prioritize locations and phases of work so that limited budgets are focused on the highest-risk conditions first.
- Urban infill and mixed-use redevelopment projects.
- Upgrades or expansions at operating industrial facilities.
- Portfolio risk reduction and asset repositioning.
- Regulatory closure or long-term site management strategies.
- Real estate transactions throughout California’s major markets.
Need Lead, PCB, or Arsenic Soil Remediation in California?
Whether you are responding to a regulatory directive, preparing a site for construction, or working through a real estate transaction, Encon Environmental can help you define and implement a practical soil remediation strategy for lead, PCBs, and arsenic.
