Bioaugmentation of Volatile Organic Compounds In Groundwater, Former NASA Industrial Plant, Downey, California.
2 Documents in Project
Summary
SCH Number
2010041092
Lead Agency
Regional Water Quality Control Board, Region 4 (Los Angeles)
Document Title
Bioaugmentation of Volatile Organic Compounds In Groundwater, Former NASA Industrial Plant, Downey, California.
Document Type
NOD - Notice of Determination
Received
Posted
7/23/2010
Document Description
Under the oversight of this Regional Board, International Rish Assessment-Downey, LLC (IRAD, Discharger) has been conducting the investigation, remediation and monitoring of soil and groundwater contamination at the subject site. IRAD, through its environmental contractor ARCADIS, has been operating a side-wide in situ reactive zone (IRZ) system since November 2005 to remediate the VOC-impacted groundwater. The IRZ system promotes enhanced reductive dechlorination (RED) of chlorinated solvents by biostimulation of the native microbial community. This groundwater remediation process is currently carried out through injecting carbohydrate solution quarterly into the VOC-impacted groundwater under Waste Discharge Requirements (WDR), Order No. R4-2002-0030, CI No. 8724, issued by this Regional Board to IRAD.
Although the current IRZ system has significantly reduced TCE concentrations in the center of the plume, performance monitoring data indicate that complete reductive dechlorination is not occuring efficiently in the vicinity of Line 1000 becuase of the presence of cis-1,2-DCE and vinyl chloride, and lack of significant ethane production. To further enahnce late-stage dechlorination in the Line 100, IRAD proposes to use bioaugmentation with selected bacteria cultures SDC-9TM or KB-1TM in addition to the current IRZ system, and submitted a report of waste discharge and an initial study for the proposed remediation activities.
Contact Information
Name
G. Jeffrey Hu
Agency Name
Regional Water Quality Control Board, Region 4 (Los Angeles)
Contact Types
Lead/Public Agency
Phone
Location
Cities
Downey
Counties
Los Angeles
Cross Streets
Lakewood Blvd and Alameda
Zip
90242
Total Acres
~155
Parcel #
6256-004-036
State Highways
105
Schools
Warren HS
Notice of Determination
Approving Agency
California Regional Water Quality Control Board
Approving Agency Role
Lead Agency
Approved On
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 Mitigated or 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
No
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.