Central Area In-Situ Remediation Pilot Study Project

Central Area In-Situ Remediation Pilot Study Project

The proposed project involves implementation of a pilot study to evaluate in-situ (below ground surface) remediation technology in a controlled test cell as part of the development of a long-term strategy for remediation of groundwater containing chromium at the Hinkley Compressor Station (the site). The site is located east of the community of Hinkley in San Bernardino County in the Harper Valley Subarea of the Mohave Hydrologic Unit. The proposed pilot study will evaluate in-situ biological reduction of hexavalent [Cr(VI)] to trivalent chromium [Cr(III)] using cross-gradient groundwater recirculation. Reduced conditions will be created from injecting food-grade carbon sources, such as lactate, whey, and emulsified vegetable oil, into the aquifer at the Central Area of the Cr(VI) plume. Prior laboratory and field studies have shown that these injections do not create harmful or long-lasting environmental conditions affecting water quality or public health and safety.

San Bernardino

California Department of Health Care Services (DHCS), California Department of Parks and Recreation, California Department of Transportation, District 8 (DOT), California Native American Heritage Commission (NAHC), California State Lands Commission (SLC), Colorado River Board, Department of Fish and Wildlife, Region 6, Department of Toxic Substances Control, Department of Water Resources, Resources Agency, State Water Resources Control Board, Division of Water Quality, State Water Resources Control Board, Divison of Financial Assistance

Waste Treatment:Other (metals)

well permit

Air Quality, Biological Resources, Cumulative Effects, Hazards & Hazardous Materials, Hydrology/Water Quality, Noise, Transportation