Soil and Groundwater Testing & Analysis in California
Encon Environmental provides soil and groundwater sampling, testing, and data analysis to support environmental investigations, remediation, and compliance programs at commercial and industrial sites across California.
Our field teams and professional staff work together to design sampling programs, collect representative samples, and interpret results within the context of California regulatory requirements and your project goals.
- Soil and groundwater sampling for investigations, cleanup, and monitoring.
- Analysis of petroleum hydrocarbons, VOCs, SVOCs, metals, and other key contaminants.
- Decision-focused data evaluation for regulators, owners, buyers, and lenders.
Soil and Groundwater Testing for California Sites
Soil and groundwater testing is a core tool for understanding subsurface conditions at sites with current or historical industrial, commercial, or fueling operations.
Encon designs testing programs that respond to specific project drivers—real estate transactions, regulatory directives, spill response, redevelopment, or ongoing compliance. We focus on collecting defensible data that can be used to evaluate risk, design remedies, and move sites toward closure under California programs.
Whether you are evaluating a single property or a portfolio of locations, our team can tailor sampling locations, depths, and analyte lists to match likely sources, migration pathways, and regulatory expectations.
- Follow-up to Phase I or Phase II Environmental Site Assessments.
- UST and fueling system releases at retail or fleet facilities.
- Historic manufacturing, metalworking, or chemical handling operations.
- Redevelopment of legacy industrial and commercial properties.
- Regulatory monitoring required by local or state agencies.
Field Sampling Methods for Soil and Groundwater
Encon’s field crews use established sampling protocols to collect representative soil and groundwater samples from surface and subsurface locations. Our approach is designed to meet California regulatory expectations while respecting site access, safety, and operational constraints.
We commonly pair direct-push Geoprobe work with conventional drilling and hand methods, depending on site conditions. Sampling depths, locations, and intervals are selected to evaluate likely release points, migration pathways, and exposure areas.
- Soil sampling from shallow and deep borings.
- Groundwater sampling from temporary points and monitoring wells.
- Soil vapor sampling to evaluate vapor intrusion potential.
- Sampling near UST systems, product piping, sumps, and dispensers.
- Sampling along drainage pathways and at outfalls or downgradient areas.
Laboratory Analysis and Typical Contaminants
Samples are submitted to certified analytical laboratories for testing of contaminants of concern that are relevant to the site’s operational history and regulatory program. Our staff works with the laboratory to select appropriate methods, reporting limits, and quality control measures.
Results are compiled and reviewed by licensed professionals who are familiar with California screening levels, risk-based criteria, and agency guidance. We focus on providing clear interpretations and graphics that help non-technical stakeholders understand the findings.
- Petroleum hydrocarbons (gasoline, diesel, waste oil ranges).
- Volatile organic compounds (VOCs), including chlorinated solvents and BTEX.
- Semi-volatile organic compounds (SVOCs), PAHs, and related species.
- Metals and inorganic parameters relevant to site history.
- Other compounds identified by regulators or project-specific concerns.
Data Interpretation, Compliance, and Next Steps
Testing alone is not enough—data must be placed into context. Encon interprets soil and groundwater results with respect to California regulatory guidance, your site’s conceptual model, and the decisions you need to make about cleanup, redevelopment, or continued operations.
Our reports are structured to be read by both technical and non-technical audiences, providing clear tables, figures, and narrative conclusions. Where further work is needed, we outline practical options and cost ranges so that you can plan the next phase with reasonable certainty.
- Comparison to relevant California screening levels and guidance.
- Identification of areas requiring additional assessment or remediation.
- Recommendations for interim measures or corrective actions.
- Support for regulatory correspondence and meeting preparation.
- Integration of results into Phase II, remedial design, or closure strategies.
Need Soil or Groundwater Testing for a California Property?
Whether you are responding to a regulatory directive, planning a Phase II investigation, or confirming cleanup performance, Encon Environmental can design a soil and groundwater testing program that fits your site and your schedule.
