The Arroyo at Monrovia Removal Action Workplan
5 Documents in Project
Summary
SCH Number
2019050016
Lead Agency
City of Monrovia
Document Title
The Arroyo at Monrovia Removal Action Workplan
Document Type
NOD - Notice of Determination
Received
Posted
9/8/2022
Document Description
The Department of Toxic Substances Control (DTSC) approved The Arroyo at Monrovia Removal Action Workplan (RAW). The RAW identified elevated concentrations of Chemicals of Concern in soil vapor that pose a potential health risk to future occupants of the new mixed-use residential and commercial building from vapor intrusion.
To address Tetrachloroethylene, Trichloroethylene, and heavy metals the following remedial actions will be implemented:
• Installation of a Soil Vapor Extraction (SVE) system to extract Chemicals of Concern from unsaturated soil. The SVE system will consist of an extraction well network, soil vapor treatment system, trenched conveyance lines, blower, and monitoring network.
• Limited Shallow Soil Excavation – Excavate approximately 465 cubic yards of dieldrin, and toxaphene impacted soil from the property located at 230 W. Evergreen Avenue.
• Institutional Controls (IC) - ICs will consist of a Land Use Covenant that includes a soil management plan for shallow soil disturbed at the Site, as well as a requirement, where necessary, of appropriate engineering controls, such as a Vapor Intrusion Mitigation System, for the protection of residents and workers within future buildings that may be constructed on the Site.
Contact Information
Name
Fatima Carrera
Agency Name
Department of Toxic Substances Control
Job Title
Project Manager
Contact Types
Responsible Agency
Phone
Location
Cities
Monrovia
Counties
Los Angeles
Regions
Southern California
Zip
91016
Other Location Info
202-238 West Evergreen Avenue; 1610 South Magnolia Avenue; 1551 South Primrose Avenue, Monrovia,
Notice of Determination
Approving Agency
Department of Toxic Substances Control
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Los Angeles
Final Environmental Document Available at
https://www.envirostor.dtsc.ca.gov/public/profile_report.asp?global_id=60002885
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
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
Yes (Statement of Findings )
(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
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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