Central Area In-Situ Remediation Pilot Study Project

4 Documents in Project

Summary

SCH Number
2006041005
Lead Agency
Regional Water Quality Control Board, Region 6 (Lahontan), South Lake Tahoe (Regional Water Quality Control Board, Region 6 (Lahontan))
Document Title
Central Area In-Situ Remediation Pilot Study Project
Document Type
NOD - Notice of Determination
Received
Posted
9/25/2006
Present Land Use
Test Cell 3- RL- 5

Document Description
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.

Contact Information
Lisa Dernbach
Regional Water Quality Control Board, Region 6 (Lahontan)
2501 Lake Tahoe Boulevard
South Lake Tahoe, CA 96150

Phone : (530) 542-5424

Location

Counties
San Bernardino
Cross Streets
Frontier Road/ Fairview Road
Zip
92347
Total Acres
5
Parcel #
0494-251-15, -03
State Highways
58
Railways
ATS
Schools
Hinkley Elem
Waterways
Mojave River
Other Location Info
Hinkley

Notice of Determination

Approving Agency
Regional Water Quality Control Board
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
Regional Water Quality Control Board

Determinations

(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
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