Risk assesments are effective tools in the evaluation of remediation options for contaminated sites. We employ the data quality objectives process to ensure that data collected during field investigations are suitable for evaluating the potential risk a site may pose to human health and the environment. We have completed risk assessment projects for sites contaminated with metals, petroleum hydrocarbons, volatile organics, semi-volatile organics, and pesticides and herbicides. The types of projects we have completed for municipal, industrial, and private clients, with regulatory concurrence, include the following:

• Preliminary Endangerment Assessments, in accordance with California Department of Toxic Substances Control (DTSC) guidelines
• Human Health Risk Assessments, in accordance with DTSC and U.S. Environmental Protection Agency (U.S. EPA) guidelines
• Risk-based Corrective Actions Screening Level development, in accordance with the American Society for Testing and Materials, U.S. EPA, and City of Oakland guidelines
• Ecological Health Risk Assessments and Screening Assessments
• Third-party risk assessment review