Pacific Gas and Electric, Colusa, Former Manufactured Gas Plant Explanation of Significant Differences
3 Documents in Project
Summary
SCH Number
2011032032
Lead Agency
Department of Toxic Substances Control
Document Title
Pacific Gas and Electric, Colusa, Former Manufactured Gas Plant Explanation of Significant Differences
Document Type
NOD - Notice of Determination
Received
Posted
8/13/2020
Document Description
The Department of Toxic Substances Control (DTSC) approved an Explanation of Significant Differences (ESD) to the PG& E Colusa, Former Manufactured Gas Plant Remedial Action Plan (RAP) that was approved by DTSC on April 29, 2011.
The 2011 RAP did not address contaminated soil where the active electrical equipment was in operation. The electrical substation occupies approximately 10,780 square feet of the eastern portion of the Project Site. PG&E is upgrading and replacing electrical distribution equipment within the electrical substation, which will allow a portion of the substation to be accessible for remedial excavation in the summer/fall of 2020.
The additional remedial action within the Substation consists of the excavation and disposal of approximately 2,000 cubic yards of contaminated soil impacted with polycyclic aromatic hydrocarbons (PAHs), total petroleum hydrocarbons (TPHs), polychlorinated biphenyls (PCBs), arsenic, and lead. The onsite preparation, excavation, and subsequent backfill operations and restoration are estimated to take approximately 2.5 to 3 months. The Revised Project will be conducted under DTSC oversight in accordance with the DTSC-approved RAP (CH2M 2011) and the Remedial Design Implementation Plan (RDIP) Addendum 1 (ETIC 2020) approved by DTSC.
Contact Information
Name
Karri Peters
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency
Phone
Location
Cities
Colusa
Counties
Colusa
Other Location Info
105 2nd Street, Colusa, California, 95932
Notice of Determination
Approving Agency
DTSC
Approving Agency Role
Lead Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
Yes
(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
No
(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