Agency Liaison & Regulatory-Directed Cleanup in California
Have you received a directive to investigate or clean up a property from a State, Federal, or Local agency? Encon Environmental helps property owners and operators interpret those directives, respond effectively, and move sites toward compliance and closure.
We routinely work under agency guidance to design and implement soil, soil-vapor, and groundwater investigations and cleanup programs. Our role is to bridge the gap between regulatory expectations and practical, cost-effective field work.
- Interpretation of agency letters, directives, and orders.
- Development of responsive workplans and cleanup strategies.
- Ongoing communication with regulators through to closure where feasible.
State, Federal, and Local Regulatory-Directed Cleanup
Agency directives can be technical, time-sensitive, and easy to misinterpret. Encon Environmental helps you understand exactly what has been requested and how to respond with a focused, defensible plan.
Our staff reviews regulatory correspondence, historical reports, and available data to clarify the issues driving the directive—whether they relate to soil contamination, groundwater impacts, vapor intrusion, or building-related hazards. We then develop a path that addresses agency concerns while recognizing your operational and financial constraints.
Many of our projects begin when a property owner, operator, or real estate stakeholder receives a letter from a Regional Water Quality Control Board, DTSC, local environmental health department, or fire department requiring assessment and cleanup. We work to keep communication constructive, timely, and focused on realistic outcomes.
- Regional Water Quality Control Board (RWQCB).
- Department of Toxic Substances Control (DTSC).
- South Coast Air Quality Management District (SCAQMD).
- County of Los Angeles Department of Public Works.
- City of Los Angeles Fire Department.
- City of Santa Fe Springs.
- Orange County Environmental Health.
- San Bernardino County Department of Environmental Health.
- County of Ventura.
- San Diego County and Santa Barbara County agencies.
From Directive Letter to Approved Workplan
Agency-directed cleanup is most effective when it follows a clear, stepwise process. Encon Environmental acts as your technical and strategic lead, building a roadmap from the initial directive to an approved workplan and, ultimately, to documented progress or closure.
We often integrate existing information, such as prior Phase I and Phase II Environmental Site Assessments, soil and groundwater data, and historical operations, so that workplans focus on filling true data gaps and addressing likely sources and pathways of contamination.
- Review of agency directive, deadlines, and cited regulations.
- Evaluation of existing reports, data, and site history.
- Preparation of a site-specific investigation and/or cleanup workplan.
- Submittal to the lead agency and response to technical comments.
- Implementation of approved work, followed by reporting and next-step recommendations.
Programs and Site Types We Frequently Support
Agency-directed cleanup can involve a wide range of site types and contaminants. Encon Environmental’s experience spans fueling facilities, industrial properties, redeveloping commercial sites, and legacy contamination issues at both large and small properties.
Many of these projects involve overlapping programs, such as UST cleanup fund cases, soil and groundwater corrective action, vapor intrusion evaluations, or building-related abatement for lead-based paint, asbestos, or PCBs. We coordinate activities so that each effort supports the overall path to risk reduction and compliance.
- UST release sites requiring soil and groundwater investigation and cleanup.
- Soil and soil-vapor assessments at former industrial or manufacturing properties.
- Vapor intrusion evaluations for existing buildings or planned redevelopment.
- Lead, PCB, and arsenic soil remediation overseen by local or state agencies.
- Clarifier, hydraulic lift, and waste oil tank removal and closure under agency review.
Balancing Compliance Requirements with Business Objectives
While agency directives define minimum requirements, property owners and operators still need to manage budgets, schedules, and day-to-day operations. Encon works to align environmental obligations with business realities, helping you prioritize actions and avoid over- or under-scoping work.
Our goal is to maintain open communication with regulators, present data clearly, and advocate for realistic cleanup targets, including low-risk closure options where they are appropriate and supported by site conditions.
- Understand exactly what a directive is asking for.
- Avoid unnecessary investigation and remediation costs.
- Meet regulatory deadlines with clear, defensible submittals.
- Coordinate field work with ongoing operations or redevelopment schedules.
- Move step-by-step toward risk reduction and, where feasible, case closure.
Need Help Responding to an Agency Directive in California?
If you have received a letter or directive from the Regional Water Quality Control Board, DTSC, a county health department, or another agency, Encon Environmental can review your case and outline a practical investigation or cleanup strategy.
