U.S. ENVIRONMENTAL PROTECTION AGENCY
POLLUTION/SITUATION REPORT
Sierra Zinc Mine & Mill - Removal Polrep

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Region X
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Subject:
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POLREP #10
Continued Removal Activities
Sierra Zinc Mine & Mill
10MC
Northport, WA
Latitude: 48.7745000 Longitude: -117.6684000
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To:
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Lynne Kershner, EPA R10 (POLREP LIST)
Rick Albright, EPA Region 10 (POLREP List)
Chris Field, EPA Region 10 (POLREP List)
Wally Moon, EPA Region 10 (POLREP List)
Calvin Terada, EPA Region 10 (POLREP List)
Ted Yackulic, US EPA Region 10
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From:
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David Rees, On-Scene Coordinator
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Date:
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6/19/2015
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Reporting Period:
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June 8 - 26, 2015
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1. Introduction
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1.1 Background
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Site Number: |
10MC |
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Contract Number: |
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D.O. Number: |
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Action Memo Date: |
8/28/2014 |
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Response Authority: |
CERCLA |
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Response Type: |
Time-Critical |
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Response Lead: |
EPA |
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Incident Category: |
Removal Action |
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NPL Status: |
Non NPL |
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Operable Unit: |
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Mobilization Date: |
10/13/2014 |
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Start Date: |
10/13/2014 |
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Demob Date: |
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Completion Date: |
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CERCLIS ID: |
WAN001002396 |
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RCRIS ID: |
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ERNS No.: |
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State Notification: |
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FPN#: |
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Reimbursable Account #: |
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1.1.1 Incident Category
Time-Critical Removal Action
1.1.2 Site Description
See initial POLREP.
1.1.2.1 Location
See initial POLREP.
1.1.2.2 Description of Threat
See initial POLREP.
1.1.3 Preliminary Removal Assessment/Removal Site Inspection Results
See initial POLREP.
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2. Current Activities
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2.1 Operations Section
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2.1.1 Narrative
June 8 - 12, 2015
SWPPP controls and BMPs were inspected on-site prior to work
each day. Approximately 500 cubic yards (cyds) of contaminated material were
excavated in the cedar trees north of Harrier Creek Road and placed on the
tailings impoundment. Minimal amounts of contaminated material were found east
of the cedar tree area. Test pits were excavated in the area and will be
reviewed the week of June 15 to determine an excavation strategy. Approximately
15,000 cyds of contaminated material were excavated south of Harrier Creek Road
and placed on the impoundment. On June 10, clearing and grubbing of the
Arrington borrow area began, approximately 6 acres have been cleared to date. A total of nine air samples were collected during removal activities. The samples were analyzed for lead using NIOSH Method 7300. Sample results were received for samples collected the week of June 1, 2015. One sample collected on June 1 from the northeast corner of the site had a detection of 0.00016 mg/mg3, all other samples collected during this week were below the detection limit.
June 15 - 19, 2015
SWPP controls and BMPs were inspected prior to work each day and necessary improvements were made. Approximately 4,000 cyds of contaminated material were excavated on the perimeter of the impoundment. Test pits were excavated on the west side of the impoundment to determine a possible new source for ecological barrier material. The area east of Goldfield Mine Road was countered. Approximately 2,500 cyds of contaminated material were excavated from the waste rock pile and placed on the impoundment. The horse chestnut tree previously on the impoundment was transplanted in the Mill Area. Clearing and grubbing of the Arrington borrow area continued, approximately 8 acres has been cleared to date. A total of nine air samples were collected during removal activities. The samples were analyzed for lead using NIOSH Method 7300. Sample results for the samples collected the week of June 8 were received, all samples were below the detection limit.
June 22 - 26, 2015
SWPP controls and BMPs were inspected onsite prior to work each day. Approximately 3,000 cyds of contaminated material were excavated south of Harrier Creek Road and the impoundment perimeter and placed on the impoundment. Approximately 5,000 cyds of contaminated material were excavated from the Mill Area and placed on the impoundment. Approximately 1,000 cyds cover soil was placed on the road slope east of Goldfield Mine Road and north of Harrier Creek Road to create a safe grade on the side of the roads. Soil suitable to promote growth was excavated from the borrow area and stockpiled. Shaping of the impoundment and storm water drainages continued. On June 22 - 23, START and RMC collected X-Ray fluorescence confirmation samples of bottom excavations in the Mill Area. In addition, two samples were collected for off-site analysis of total metals.
2.1.2 Response Actions to Date
2.1.3 Enforcement Activities, Identity of Potentially Responsible Parties (PRPs)
2.1.4 Progress Metrics
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Manifest # |
Treatment |
Disposal |
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2.2 Planning Section
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2.2.1 Anticipated Activities
Remaining contaminated material in the Mill Area and Arrington parcel will be placed on the impoundment. Shaping of the impoundment will be finalized prior to placement of cover materials.Excavation of the newly proposed ecological barrier borrow area will begin, excavated material will be placed on the impoundment and thickness will be guided by grade stakes.
2.2.1.1 Planned Response Activities
2.2.1.2 Next Steps
2.2.2 Issues
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2.3 Logistics Section
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No information available at this time.
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2.4 Finance Section
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No information available at this time.
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2.5 Other Command Staff
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No information available at this time.
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3. Participating Entities
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3.1 Unified Command
3.2 Cooperating Agencies
Colville Confederated Tribes.
Washington State Department of Ecology
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4. Personnel On Site
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June 8 - 12, 2015
EPA None
START None
REMC 1 employee (2 on June 11/12)
ACI 6 employees
June 15 - 19, 2015
EPA None
START None
REMC 1 employee
ACI 6 employees
June 22 - 26, 2015
EPA 1 (June 23 - 25)
START 1 (June 22 - 23)
REMC 1 employee (2 on June 25)
ACI 6 employees
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5. Definition of Terms
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No information available at this time.
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6. Additional sources of information
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6.1 Internet location of additional information/report
6.2 Reporting Schedule
RMC is providing weekly reports.
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7. Situational Reference Materials
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No information available at this time.
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POLREP #10 Last Updated 7/7/2015
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