Providence Mine Cleanup

4 Documents in Project

Summary

SCH Number
2014062072
Lead Agency
Toxic Substances Control, Department of (Department of Toxic Substances Control)
Document Title
Providence Mine Cleanup
Document Type
NOD - Notice of Determination
Received

Document Description
The California Department of Toxic Substances Control is approving a Removal Action Workplan (RAW) for the approximately 1/2 acre proposed project Site, hereinafter the "Site" or " Project Area" or "Area of Potential Effect" (APE) located on the former Providence Mine property pursuant to Health & Safety Code, Division 20, Chapter 6.8 Section 25356.1 as submitted on August 20, 2013 by the Sierra Streams Institute (SSI) on behalf of Nevada City. The purpose of the RAW is to minimize human exposure primarily to lead in the mine waste (rocks/tailings/soils) on the Site. Protection from other metals that are found in the mine waste including arsenic and cadmium will also be achieved with the lead remediation because the contaminations are co-located. The RAW evaluates removal action alternatives and identifies a preferred removal action based on comparative analysis of alternatives. The preferred removal action alternative selected for the Site is a combined remedy consisting of: shallow soil excavation and removal off-site to address hazardous levels of lead in one area; soil relocation and clean soil cover in other areas; slope stability above a portion of stream bank; and the construction of an approximately 30 foot long Gabion wall near the toe of a landslide with the placement of shotcrete onto the landside scarp to stabilize it. Institutional Controls (ICs), which are non-engineered methods, such as administrative and legal controls, will be used to minimize the potential for human exposure to contamination.

Contact Information
Dean Wright
Department of Toxic Substances Control
8800 Cal Center Drive
Sacramento, CA 95826

916-255-6528

Location

Coordinates
39°15'32"N 121°2'14"W
Cities
Nevada City
Counties
Nevada
Cross Streets
North and east of Providence Mine Road on the south side of Deer Creek, one mile downstream of d
Zip
95959
Total Acres
.53
Parcel #
05-100-87
State Highways
Hwy 20/49
Schools
Various
Waterways
Deer Creek
Township
16N
Range
8E
Section
12

Notice of Determination

Approving Agency
DTSC
Approving Agency Role
Lead Agency
Approved On
Final EIR Available Location
DTSC, File Room 8800 Cal Center Drive Sacramento, CA 95826 916-255-3758

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 Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A Statement of Overriding Considerations was adopted for this project
No
(5) Findings were made pursuant to the provisions of CEQA
Yes
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