SCE Mesa Facility Parcels 6 and 7 Removal Action Workplan

2 Documents in Project


SCH Number
Public Agency
Department of Toxic Substances Control
Document Title
SCE Mesa Facility Parcels 6 and 7 Removal Action Workplan
Document Type
NOE - Notice of Exemption
Document Description
The purpose of the Removal Action Workplan (RAW) is to remediate hexavalent chromium and lead in Site soil as well as tetrachloroethene (PCE) in soil vapor, through excavation and off-site removal of contaminated soil, to minimize future potential human exposure to these chemicals. Implementation of the RAW is expected to take 45 days and require excavation, loading and off-site disposal of approximately 5,400 Cubic Yards (CY) of soil from the Site. Soil and soil gas confirmation sampling, analyses, and health risk assessment will be conducted to confirm that residual chemicals on site will have no potential future impact on site occupants and that unrestricted closure status for the Site can be granted by DTSC. The RAW includes evaluation of available removal methods and selects a preferred alternative to be used to clean-up the Site based on the Final Comprehensive Site Characterization Report (CSCR) approved by DTSC in August 2019. The RAW was submitted in August 2019, by Leighton Consulting, Inc. on behalf of Southern California Edison (SCE), the project proponent. See NOE for Full Details.

Contact Information

Angela Turner
Agency Name
Department of Toxic Substances Control
Contact Types
Lead/Public Agency

Agency Name
Southern California Edison
Contact Types
Project Applicant


San Clemente
Cross Streets
14300 Mesa Road

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Reasons for Exemption
1. The project is a minor action designed to prevent, minimize, stabilize, mitigate, or eliminate the release or threat of release of hazardous waste or hazardous substances. 2. The project will not exceed $1 million in cost. 3. The project will be consistent with applicable State and local environmental permitting requirements. 4. The project does not involve the onsite use of a hazardous waste incinerator or thermal treatment unit. 5. The project does not involve the relocation of residences or businesses. 6. The project does not involve the potential release into the air of volatile organic compounds as defined in Health and Safety Code Section 25123.6. 7. The exceptions pursuant to California Code of Regulations, Title 14, Section 15300.2 have been addressed as follows: a. Cumulative Impact. The project will not result in cumulative impacts because it is designed to be a short term final remedy that would not lead to a succession of projects of the same type in the same place over time. b. Significant Effect. The environmental safeguards and monitoring procedures that are enforceable and made a condition of project approval will prevent unusual circumstances from occurring so that there is no possibility that the project will have a significant effect on the environment. c. Scenic Highways. The project will not damage scenic resources, including but not limited to, trees, historic buildings, rock outcroppings, or similar resources, because it is not located within a highway officially designated as a state scenic highway. d. Hazardous Waste Sites. The project is not located on a site which is included on any list compiled pursuant to Section 65962.5 of the Government Code. ( e. Historical Resources. The project will not cause a substantial adverse change in the significance of a historical resource at the Site because there are none at the Site


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