Through a collaborative endeavor, the Department of Toxic Substances Control, the Los Angeles Regional Water Quality Control Board, and the DTSC have collaboratively formulated the Advisory Reproof for Active Soil Gas Investigations (ASGI). This initiative establishes robust and consistent protocols for the collection and analysis of soil gas samples.

Key benefits of Active Soil Gas Investigations include:

• Cost Efficiency: Significantly reduces total site investigation expenses by potentially up to 50%.

• Time Savings: Accelerates the investigation timeline, with preliminary results attainable within 24 hours of sampling.

• Laboratory Cost Reduction: Minimizes expenses associated with laboratory chemical analyses.

• Real Estate Transactions: Streamlines the site assessment process, saving both time and costs for real estate transactions.

• Business Continuity: Minimizes disruptions to ongoing business operations.

• Source Identification: Defines the origin of soil and groundwater contamination, capable of pinpointing sources such as underground or aboveground leaks and chemical spills.

With the ASGI Advisory Reproof, stakeholders can rely on a unified and efficient approach to soil gas investigations, ensuring sound decision-making, reduced costs, and enhanced environmental management practices.