Remedial Design for the Mather Former Waste Disposal Area
5 Documents in Project
Summary
SCH Number
2022050242
Lead Agency
Department of Toxic Substances Control
Document Title
Remedial Design for the Mather Former Waste Disposal Area
Document Type
NOD - Notice of Determination
Received
Posted
9/23/2022
Document Description
The project activities will involve removal of contaminated soils and debris that pose a threat to human health and the environment. The removal action will protect human health and the environment through excavation and disposal of contaminated soil exceeding recommended removal goals (RGs) for metals and polycyclic aromatic hydrocarbons (PAHs), dioxin/furans, and total petroleum hydrocarbons (TPH)(diesel and heavy oil range). The excavation would address Remedial Action Objectives (RAOs) by removing and disposing of contaminated soils at existing licensed disposal facilities outside the boundaries of the Site. An estimated total of approximately 310 cubic yards of soil would be excavated and removed from the Site. Measures to control fugitive dust and implementation of stormwater pollution prevention would be performed during the soil removal. Excavated areas will be backfilled with clean soil to match prior surface conditions. Filled and regraded areas would be re-seeded and planted with native plant materials. Institutional Controls (ICs) may be needed and may include implementation of a soil management plan should future construction be planned in order to protect future construction workers with protocols and safety precautions for any intrusive activities involving possibly impacted soil.
Contact Information
Name
Lynne Baumgras
Agency Name
Department of Toxic Substances Control
Job Title
Senior Engineering Geologist
Contact Types
Lead/Public Agency
Phone
Location
Counties
Mariposa
Regions
Countywide
Other Location Info
Yosemite National Park
Notice of Determination
Approving Agency
Department of Toxic Substances Control
Approving Agency Role
Lead Agency
Approved On
County Clerk
Mariposa
Final Environmental Document Available at
https://www.envirostor.dtsc.ca.gov/public/profile_report.asp?global_id=80001261
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
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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