Holdrege & Kull – Consulting Engineers and Geologists specializes in hazardous materials site characterization and remedial design. We work extensively with the California EPA and have a strong rapport with the Department of Toxic Substances Control (DTSC), the Regional Water Quality Control Boards, and with many municipal health departments. We work efficiently with these agencies to develop cost-effective solutions that are protective of human health and the environment. H&K’s strong presence in the Sierra Nevada and our extensive experience with abandoned mine lands and agricultural pesticide residuals complements our knowledge of the more urban-centered environmental conditions such as solvent and petroleum hydrocarbon releases.