Preliminary Environmental Assessment For School Sites
Children are uniquely vulnerable to environmental hazards, which is why California law requires state oversight to ensure school properties are safe for students, staff, and surrounding communities before they are purchased, developed, or occupied. To help support Preliminary Environmental Assessment for School Sites, a Preliminary Environmental Assessment (PEA) is used to provide information if there has been a release of a hazardous substance at a potential school site that presents a risk to human health or the environment. This process plays a critical role in protecting public health, ensuring regulatory compliance, and managing environmental risk associated with school development.
Purpose of a Preliminary Environmental Assessment For School Sites
The primary purpose of a PEA is to provide DTSC with sufficient information to make an informed regulatory determination. Based on the findings, DTSC may conclude that a proposed school site requires no further action or may require the site to proceed into additional investigation or remediation under California’s hazardous waste and site cleanup programs. This authority is rooted in statutory mandates, public health protection, and risk-based environmental regulation.
Core Objectives of a DTSC PEA
- Determine Whether a Hazardous Substance Release Has Occurred
A fundamental objective of the PEA is to evaluate whether hazardous substances or petroleum products have been released at the site. This evaluation relies on available environmental data and, when necessary, limited sampling to confirm site conditions. The assessment also considers whether any identified release is associated with current or historical site activities.
This determination is essential to DTSC’s authority under California Health and Safety Code §25319.5, which governs DTSC’s ability to require further investigation or corrective action. Establishing the presence or absence of a release provides the foundation for all subsequent regulatory decisions.
-
Evaluate Potential Risk to Human Health and the Environment
Another central purpose of the PEA is to assess whether any identified or suspected release could pose a risk to human health or the environment. This includes evaluating potential exposure to people, ecological receptors, and sensitive populations such as children.
The risk evaluation considers current and reasonably anticipated future land use and focuses on key exposure pathways, including soil, groundwater, soil vapor, surface water, and air. The PEA also evaluates current and future receptors and compares findings to DTSC screening-level risk criteria. This risk-based approach ensures that sites are evaluated consistently and conservatively to protect public health.
-
Support DTSC Decision-Making on Next Steps
Based on the PEA findings, DTSC may issue several types of regulatory determinations. These may include a No Further Action (NFA) determination if no unacceptable risk is identified. In other cases, DTSC may require a Supplemental Site Investigation (SSI) or Remedial Investigation (RI) to further characterize site conditions.
DTSC may also determine that institutional controls, such as a land use covenant, are necessary or may enter the site into DTSC’s formal cleanup process. These outcomes ensure that regulatory oversight and resources are focused on sites that warrant further attention, while allowing suitable sites to proceed without unnecessary delay.
How a Preliminary Environmental Assessment for School Sites Fits into DTSC’s Cleanup Framework
DTSC considers the PEA an early but critical step in the site assessment and cleanup framework. It serves as a bridge between initial environmental due diligence and more comprehensive remedial investigation and response actions. The PEA is intentionally designed to be efficient, risk-focused, and protective of public health and the environment, particularly for sensitive land uses such as schools.
To learn more about Preliminary Environmental Assessments for School Sites and how BSK Associates can help support your business or institution, contact Kevin Grove, Managing Principal – Environmental Services.
