Site Cleanup Requirements for Phillips 66 Company Line 200 Release

4 Documents in Project


SCH Number
Lead Agency
Regional Water Quality Control Board, Region 2 (San Francisco Bay), Oakland
Document Title
Site Cleanup Requirements for Phillips 66 Company Line 200 Release
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Land Use: grazing land, former residential property; General Plan; Concord Reuse Project Open Space (CRP-OS), Rural Residential
Document Description
The project would consist of remediation of soil and groundwater contamination on and adjacent to the Concord Naval Weapons Station (CNWS) in Contra Costa County that resulted from a leak in the Phillips 66 Company's Line 200 oil pipeline where it crosses to CNWS. The leak was discovered and repaired in Nov. 2011 and an initial emergency response cleanup was performed between Nov. 2011 and Feb. 2012. The plume of light non-aqueous phase liquid (LNAPL) contamination spreads to an adjacent residential property located within the City of Concord, immediately south of the pipeline leak. The purpose of the proposed project is to remove via excavation the bulk of the LNAPL and soil contamination that could pose a threat to human and ecological receptors through direct contact, vapor intrusion, and leaching to groundwater.

Contact Information

Ross Steenson
Agency Name
Regional Water Quality Control Board, Region 2 (San Francisco Ba
Contact Types
Lead/Public Agency


Contra Costa
Cross Streets
Holly Drive at Holly Creek Place
Total Acres
Parcel #
117-070-009, 111-010-014
Ayers ES
Mt. Diablo Creek, Rattlesnake Creek

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Fish and Wildlife, Bay Delta Region 3 (CDFW), California Department of Parks and Recreation, California Department of Transportation, District 4 (DOT), California Energy Commission, California Native American Heritage Commission (NAHC), California Public Utilities Commission (CPUC), California Regional Water Quality Control Board, San Francisco Bay Region 2 (RWQCB), California State Lands Commission (SLC), Department of Toxic Substances Control, Department of Water Resources, Resources Agency, State Water Resources Control Board, Divison of Financial Assistance
Development Types
Other (no development; site cleanup only)
Local Actions
Site cleanup
Project Issues
Aesthetics, Agriculture and Forestry Resources, Air Quality, Biological Resources, Cultural Resources, Cumulative Effects, Drainage/Absorption, Economics/Jobs, Flood Plain/Flooding, Geology/Soils, Hazards & Hazardous Materials, Hydrology/Water Quality, Land Use/Planning, Mineral Resources, Noise, Population/Housing, Public Services, Recreation, Schools/Universities, Sewer Capacity, Solid Waste, Transportation, Vegetation, Wetland/Riparian, Wildfire

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 or via phone at (916) 445-0613.

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