Action plan for a feasibility study of the Britannia Mine ... · The document describes the development of MWLAP’s plan for remediation of the Britannia Mine site, including a detailed

G865B

AMEC Simons Mining & MetalsU747A

01 November 2001

of the

Action Plan Feasibility Studyfor a

BRITANNIA MINE REMEDIATION PROJECT

Government of British ColumbiaMinistry of Water, Land and Air Protection

AMEC E&C Services Limited 111 Dunsmuir Street, Suite 400 Vancouver, B.C. V6B 5W3 Tel (604) 664-4315 Fax (604) 669-9516 www.amec.com

November 23, 2001 Mr. J.W. McCracken Regional Director Government of British Columbia Ministry of Water, Land and Air Protection 10470 – 152 Street Surrey BC V3R 0Y3 Dear Jim: RE: ACTION PLAN for a FEASIBILITY STUDY of the BRITANNIA MINE REMEDIATION PROJECT The attached Action Plan was developed by 33 representatives of MWLAP, MELP, MEM, SLRD, Environment Canada, Fraser Basin Council, B.C. Museum of Mining, UBC, Golder Associates, SRK Consulting, URS, CH2M Hill, Klohn Crippen, and Water Management Consultants during a two-day facilitated ESP (Enhanced Systematic Planning) Session held in the offices of AMEC Simons Mining & Metals in Vancouver BC on November 1st and 2nd, 2001. The document describes the development of MWLAP’s plan for remediation of the Britannia Mine site, including a detailed feasibility study for a water treatment plant and an associated water management system. The Feasibility Master Schedule included in this Action Plan has 135 work packages distributed over sixteen work areas. It is a high-level schedule with a solid project perspective, suitable for administration of the program. It intentionally does not include the level of information that will be necessary to manage the details of the Feasibility Study or the associated programs. It is expected that this Action Plan will prove to be a valuable baseline document to guide the execution of the Feasibility Study and the overall advancement of the Britannia Mine Remediation Project.

Distribution: Planners: Gerry O’Hara, Ray Robb, Peggy Evans, David Sellars, Peter Healey, Daryl Hockley, Tom Field, Jim Mavis,

Doug Whiticar, Steve Sibbick Sponsor: Jim McCracken Observers: Doug Pope, Walter Kuit, Rob McCandless, Gregg Stewart, Barry Azevedo, Ted Hall, Mike Nassichuk, Chris

Carr, Steve Olmstead, Pam Tattersfield, John Meech, Bob Purdy, Terry Johnson, Yale Simpson, Reidar Zapf-Gilje, Ross Hammett, Jim McCrea, Rick Peleshytyk, Don Chorley, Graham Parkinson, Tom Robinson

Spares: Jim McCracken2, Rob McCandless2, Gerry O’Hara14 AMEC: Terry Lee2, CP File U747A2

ACTION PLAN for a FEASIBILITY STUDY of the BRITANNIA MINE REMEDIATION PROJECT Government of B.C. – Ministry of Water, Land and Air Protection

SUMMARY

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INTRODUCTION The attached Action Plan was developed by 33 representatives of MWLAP, MELP, MEM, SLRD, Environment Canada, Fraser Basin Council, B.C. Museum of Mining, UBC, Golder Associates, SRK Consulting, URS, CH2M Hill Canada Limited, Klohn Crippen, and Water Management Consultants during a 2-day interactive ESP (Enhanced Systematic Planning) Session held in AMEC’s offices in Vancouver on November 1st and 2nd, 2001. The planning session was facilitated and documented by AMEC Simons Mining & Metals. NAME OF PROJECT The name of the project is the Britannia Mine Remediation Project. OBJECTIVE OF PROJECT MWLAP’s representatives, with the participation and endorsement from the other provincial and federal representatives identified the objective of the project as an intent “... to develop and implement a project that: • – will reduce environmental impacts on fisheries (including other aquatic organisms, the

fish habitat, and sediment and water quality) resulting from water and sediments originating from the mine site, by meeting site-specific risk-based provincial and federal requirements.

• – will construct a water treatment plant and other works to treat drainages to meet site-specific provincial and federal requirements.

• – will reduce contamination-related human health risks on, and emanating from, the mine site by meeting site-specific risk-based provincial requirements.

• – will consider future sustainable development, compatible with land use designations in SLRD’s official community plan.”

OBJECTIVE OF ESP SESSION The planning team established the objective of the ESP Session as a requirement “... to develop an Action Plan for remediation of the Britannia Mine site, including a ‘Detailed Feasibility Study’ for a water treatment system that will meet the project objectives.”


SUMMARY

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PLANNING TEAM The Action Plan defined in this document was developed by the 33 planning session participants identified below. The full planning team functioned on an interactive, participative basis, without stringent regard for their government or corporate alignments, although these affiliations are identified below. These same planners also wrote the scope descriptions in Section 2 of this document; there, their initials identify the authors of each work package. Business cards for the participants are included in this report commencing on Page 1-08. Planners Initials Areas of Contribution MWLAP

Gerry O’Hara GCO’H Geol Eng; Mine Ops; HydroGeol; Remediation Ray Robb RHR Chem/Enviro; Prov Oversight Peggy Evans PLE HydroGeol; Contam Sites; Tech Advisor; Waste Mgt

WMC

David Sellars CDS Civil; Water Resources; Flood Mgt; Flood Hazard SRK

Peter Healey PMH Civil; Proj Mgt; Mine Reclamation Projects; HydroGeol Daryl Hockley DEH Civil/Chem; Mine Closures; ARD

CH2M

Tom Field TF Hydrology; PM Infra Projects; Planning & Implementation Jim Mavis JDM Phys Chem; Mine Remediation; Water Treatment Chem; Ops

URS

Doug Whiticar DMW Enviro Eng; Remedial; WWT; HydroGeol Steve Sibbick SJS Geochem; Fieldwork; Proj Mgt

AMEC Terry Lee TDL Facilitator

Sponsor Initials Areas of Contribution MWLAP

Jim McCracken JWMcC Civil; Water Mgt; Regional Water; MWLAP “Owner’s Rep”


SUMMARY

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Observers Initials Areas of Contribution MWLAP

Doug Pope DTP Civil/Enviro; Prov Regs Technical Advisory Committee

Walter Kuit WJK WTP Process; Chem R&D Rob McCandless RGM Geol; Mine Ops; Fed Regs (Fisheries Act) Gregg Stewart GGS Geol; MEM Regulator; Mine Permitting; Mines Act Barry Azevedo BDA Chem/Enviro; Tech Support; Prov Regs

Steering Committee

Ted Hall TJH Civil; MEM; Mines Act Permitting Mike Nassichuk MDN Biol; EnviroCanada; Marine Sediments

MEM

Chris Carr CAC Geotech; MEM; Permitting Tech Support SLRD

Steve Olmstead SDO SLRD Planning; Land Use Planning & Regs Pam Tattersfield PST Chem; Fisheries; BB Resident

UBC

John Meech JAM Mine Eng; 2200L Plug;Tech Resource Fraser Basin Council

Bob Purdy BP Corp Dev, Fraser Basin Council; NGO; Proj Facilitator Mining Museum

Terry Johnson TWJ Mine Eng; Britannia Mine Ops; BC Mining Museum Yale Simpson YRS Geol Eng; Mine Museum Planning; LT Site Planning

Golder Associates

Reidar Zapf-Gilje RZG Ross Hammett RDH Mine Geotech & HydroGeol Support Jim McCrea JLM Mineral Process; Proj Mgt Support Rick Peleshytyk RRP Enviro Eng; PM Support Don Chorley DWC Contam Sites; Closure Plans; HydroGeol Tech Supp

Klohn Crippen

Graham Parkinson JGP Geo Science; Mine Enviro; Water Mgt; Plug Geotech CH2M Hill

Tom Robinson STR Civil/Enviro; Proj Mgt; Civil & Process Design Note: Two representatives of Copper Beach Estates were invited to participate in this planning

exercise, but neither Alex Tsakumis nor Tim Drummond were in attendance.


SUMMARY

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WORK BREAKDOWN STRUCTURE (WBS) The Britannia Mine Remediation Project has numerous administrative and asset themes that will be developed during the feasibility study phase; and designed, procured and constructed during the implementation phase of the project. These themes, or Work Areas, were defined by the planning team prior to the start of the active planning session; they form the primary structure of the plan:

A Project Administration B Mine Inspection And Rehab C Hydrology D Flood Risk E Mine Water Collection F Mine Water Storage G Water Quality H Water Treatment Plant J Sludge Management K Fan Hydrogeology L Contaminated Soils M Risk Assessment N Remediation Plans P Sediments Q Compliance R Site Wide Monitoring

OUTSTANDING ISSUES Several outstanding issues, with potential impact on the feasibility study and/or the implementation of the project, were identified during the course of the two-day planning session:

• Potential impact of winter on study schedule • Accessibility (road maintenance) through winter period • Security of monitoring devices from vandalism • Tenure of Britannia Beach Community • Land ownership issues • Slope stability in Jane Basin • Inspection behind 2200 level plug • Potential impact of existing sanitary sewage on process


SUMMARY

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SCHEDULE CALENDAR The ESP Master Schedule in this document was prepared using the Primavera software package. It was based on the precedence [logic] network developed during the planning session, and used a start date of November 5th, 2001. The schedule uses one-day time units, with five days per calendar week. No allowances were provided for statutory holidays or vacation periods, apart from a one-week impact over the Christmas period. SCHEDULE RESULTS During the ESP Session, the 33-member planning team identified 135 key work packages and established the logic relationships that integrated the evolution of the feasibility study. They also estimated the duration of each work package. The as-developed schedule forecast a completion date for the Draft WTP Feasibility Report (Work Package H-25) of December 9th, 2002. AMEC’s Facilitator subsequently made a number of carefully rationalized adjustments to the schedule, and improved the issue date of the draft report by almost two months, to October 18th. The schedule included in this document has been modified slightly by AMEC’s Facilitator to improve the duration of the program. The changes were faithful to the intent of the planning team, and are a normal part of the planning process. These ten adjustments were made to the original schedule:

ADJUSTMENT ITEM WP – or – RELATIONSHIP From To

1 F-08 20 15 2 F-09 75 70 3 F-09/F-11 FS FF10 4 F-09/K-08 FS FF10 5 G-07/G-08 FS FF12 6 H-22/H-24 FS FF20 7 H-23/H-24 FS FF10 8 H-24/H-25 FF10 FF4 9 J-04 45 35 10 K-07 115 105


SUMMARY

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SCHEDULE FORMATS The Feasibility Master Schedule for the Britannia Mine Remediation Project is presented in this report in three different formats: • A 5-page tabulation of the work packages which describes the early start and finish

dates, the late start and finish dates, the duration, and the total float for each activity; it is included on Pages 3-02 to 3-06 of this report.

• A 7-page detailed bar chart, in color, of all work packages sorted by project areas. It is a

simple and clear presentation of all of the work packages, sorted in the usual early start-early finish fashion; it can be found following Page 3-06.

• A large Time-Scaled Logic Diagram of all work packages, grouped by Work Area. This

format is similar to the bar charts above, but the logic links have been included. The schedule was created in landscape format, and can be found in the plastic pocket at the back of this report.

In addition, a 1-page Project Overview Schedule is included in this Action Plan. It can be found following Page 1-06 in the Summary.

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SUMMARY

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BUSINESS CARDS (Page 1 of 5) For the convenience of Planners and others using this Action Plan, the business cards for the attendees are included on these five pages.

Water, Landand Air Protection

Regional Operations

Lower Mainland

Region

J.W. (Jim) McCrackenRegional Director

Location and Maining Address:10470 - 152 StreetSurrey BC V3R 0Y3

Telephone: (604) 582-5265Facsimile: (604) 582-5380e-mail:[email protected]

Mailing Address:2080B Labieux RoadNanaimo, BC V9T 6J9

Telephone: (250) 751-7375 (604) 660-9363Facsimile: (250) 751-7373Cellular: (250) 741-7856e-mail: [email protected]

Ministry ofEnergy and Mines

Mailing Address:10470 - 152 StreetSurrey BC V3R 0Y3

Telephone: (604) 582-5284Facsimile: (604) 584-9751e-mail: [email protected]

Ministry ofEnvironment,

Lands and Parks




Lands and Parks




Lands and Parks



Location:2975 Jutland Road, Victoria


Lands and Parks

Mailing Address:PO Box 9320 Stn Prov GovtVictoria BC V8W 9N3

Telephone: (250) 952-0485Facsimile: (250) 952-0481e-mail: [email protected]: www.gov.bc.ca/em

Location:5th Floor, 1810 Blanshard Street, Victoria


Mailing Address:PO Box 9320 Stn Prov GovtVictoria BC V8W 9N3

Telephone: (250) 952-0473Facsimile: (250) 952-0481e-mail: [email protected]: www.gov.bc.ca/em

Location:5th Floor, 1810 Blanshard Street, Victoria



SUMMARY

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20%

20%

Fax (416) 982 [email protected]

500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (Main) (604) 296-4200 (Direct) (604) 296-4216 (Cell) (604) 728-7940Fax: (604) 298-5253E-mail: go'[email protected]

0


500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (604) 298-6623Fax: (604) 298-5253


500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (Main) (604) 296-4200 (Direct) (604) 296-4281 (Cell) (604) 617-6623Fax: (604) 298-5253E-mail: [email protected]

0


500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (Main) (604) 296-4200 (Direct) (604) 296-4235Fax: (604) 298-5253E-mail: [email protected]


500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (604) 298-6623Fax: (604) 298-5253


500 - 4260 Still Creek DriveBurnaby, British ColumbiaCanada V5C 6C6Tel: (Main) (604) 296-4200 (Direct) (604) 296-4336 (Cell) (604) 715-3879Fax: (604) 298-5253E-mail: [email protected]


SUMMARY

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Peter M. Healey P.Eng.

Suite 800, 580 Hornby StreetVancouver, BCCanada V6C 3B6

[email protected]

Phone: +1.604.681.4196Direct: +1.604.601.8420Fax: +1.604.687.5532Home: +1.604.985.6751

Daryl Hockley M.Eng., P.Eng.

Suite 800, 580 Hornby StreetVancouver, BCCanada V6C 3B6

[email protected]

Phone: +1.604.681.4196Direct: +1.604.601.8427Fax: +1.604.687.5532

T. (Tom) Field, P.Eng., M.Eng., FEICVice President

CH2M HILL Canada Limited920 - 475 W. Georgia StreetVancouver, British Columbia V6B 4M9

Tel 604.684.3282 Ext. 304Fax 604.684.3292Cell [email protected]

James D. Mavis, Jr.

CH2M HILL 777 108th Avenue, NESuite 800Bellevue, WA 98004-5118P.O. Box 91500Bellevue, WA 98009-2050

Tel 425.453.5000Direct 425.453.5005 Ext. 5116Fax 425.468.3100E-Mail [email protected]

S. Thomas Robinson, P.Eng.Senior Project Engineer

CH2M HILL Canada Limited920 - 475 W. Georgia StreetVancouver, British Columbia V6B 4M9

Tel 604.646.2766 Ext. 312Fax 604.684.3292Cell [email protected]

Douglas M. Whiticar, P.Eng., CEAManager, BC Operations

Steve Sibbick, M.Sc., P.Geo.Senior Geochemist


SUMMARY

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Pam Tattersfield

SQUAMISH-LILLOOET REGIONAL DISTRICT

[email protected]

Steven Olmstead, MCIP

SQUAMISH-LILLOOET REGIONAL DISTRICT

[email protected]

John A. Meech, P.Eng.Professor of Mineral Processing

Department of Mining andMineral Process EngineeringRoom 517, 6350 Stores RoadVancouver, B.C. Canada V6T 1Z4

Bob Purdy Director, Corporate Development

Fraser Basin Council


SUMMARY

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Graham Parkinson P.Geo.

Senior Geophysicist

(604) 279 4405(604) 279 [email protected]

10200 Shellbridge WayRichmond, B.C., CanadaV6X 2W7

Walter J. KuitDirector, Environmental Affairs

Teck Cominco Metals Ltd.500 - 200 Burrard Street, Vancouver, BC Canada V6C 3L7telephone: (604) 685-3011 facsimile: (604) 685-3019

email: [email protected]

111 Dunsmuir StreetSuite 400Vancouver, British ColumbiaCanada V6B 5W3

TD (Terry) LeeConsultantFacilitated PlanningProject ManagementAMEC Simons Mining & Metals

www.amec.com


SCOPE DESCRIPTION

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The scope description of each work package on the following pages is brief, but it highlights the essential content and context of the work for each activity. The key persons who attended the planning session also wrote the scope descriptions for the individual work packages. For convenience, the initials of each Planner have been placed adjacent to the scope descriptions, which he or she prepared; note that the initials are not intended to imply a responsibility for execution of the work package.

* * * * * A PROJECT ADMINISTRATION A-01 Mobilize Project Website (GCO'H)

A collaborative website will be developed by Golder to assist in communications among members of the project team. The website will include data posting, scheduling, messages, tasks, contact lists and links to other relevant sites. The possibility of inclusion of a database functionality will also be reviewed.

A-02 Establish Expenditure Guidelines (GCO'H) Expenditure Guidelines will be established to provide the technical contractors with information regarding the type and level of expenditures that are considered to have been “pre-approved” in the technical contracts. These guidelines will also define the procedures to be followed in obtaining approval from the Province for other expenditures. The guidelines will be coordinated with Activity A-06.

A-03 Develop Health and Safety Plans (GCO'H) A general Health & Safety protocol will be developed to comply with the Mines Act and define the procedures for obtaining access to the site. Each technical contractor will develop its own Health & Safety Plan to, as a minimum, comply with the contractor’s health & safety procedures, WCB requirements and, where appropriate, specific requirements under the Mines Act and other relevant legislation.


SCOPE DESCRIPTION

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A-04 Resolve Contracts (GCO'H) The existing scope of work in the technical contracts will be compared to the scope of work in the Action Plan. Differences between the initial scope, as contained in the RFP and the contracts, and the scope in the Action Plan, will be identified and discussed with the technical contractors. A revised scope of work will be developed with emphasis on the total contracted amount staying within the total value of the technical contracts. Areas where there is some discretion in the Action Plan will be identified for discussion with the Province. Upon reaching a consensus, the existing contracts will be modified to reflect the changes since award of the contracts.

A-05 Develop Consultation Plan (GCO'H) In order to achieve the required level of stakeholder input and buy-in to the remediation plans and their implementation, a Consultation Plan will be developed that will identify stakeholder group(s), meeting forum(s), committee(s), and their appropriate interface to the project management and coordination.

A-06 Develop Standing Offer Eligibility List (GCO'H) Implementation of the Action Plan will require construction contractors to perform services that are outside the scope of services provided by the technical contractors. The development of a Standing Offer Eligibility List, and associated contracts, will enable the Province to have a listing of pre-approved contractors and agreed upon pricing for construction activities. Development of this List will be coordinated with the Activity A-02.

A-07 Develop Economic Model (GCO'H) An economic model will be developed to integrate and rationalize the capital and operating costs. In particular, it will address the long-term operation and maintenance of the remedial works, including the water treatment plant. Development of this model will influenceTasks A-09 and A-10.

A-08 Develop Project Execution Strategy (GCO'H) The Project Execution Strategy will define the manner in which the Province will contract the detailed design and construction of all facilities in the Britannia Mine Remediation Project, including the water treatment plant and establish all related infrastructure and water management facilities. It will also include the contracting strategy for site remediation works required to implement the remediation plans.


SCOPE DESCRIPTION

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A-09 Develop WTP Operating Strategy (JLMcC) The operating strategy will define means for funding of operating costs and replacement capital costs for all facilities including the water treatment plant, water management systems, facilities installed as a result of implementing the remediation plans and all related facilities.

A-10 Establish Operating Philosophy (JLMcC) The operating philosophy will establish criteria to guide the design of the water treatment plant and ancillary facilities by providing criteria for the trade-off between capital and operating costs, a project staffing philosophy, desired operating factors for the major components of the plant, operating reliability and other factors that must be considered in the design of the water treatment plant and related facilities.

A-11 Acquire Land Rights (GCO'H) Once the Province concurs with the recommendations of the technical consultants regarding the location of the water treatment plant, water management systems and other facilities, the Province will initiate a program to acquire the appropriate land rights, where they have not already been acquired. Acquisition of land rights will be required prior the construction phase, and has been included in the design phase to ensure that construction work can proceed.


SCOPE DESCRIPTION

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B MINE INSPECTION and REHAB

B-01 Develop Mine Inspection Plan (PMH) Based on a review of the available information, a detailed plan to carry out inspections of the mine workings and mine infrastructure (including openings at the 3250, 3100, 2700 (both), 2200, 1200, and 1000 Levels; the site of the Victoria shafts; and adits on the Furry Creek side) will be prepared in accordance with Mines Act Safety requirements and safe entry as needed for mine work. The inspection will focus on openings that will effect flow and chemistry of the mine water to the 4100 tunnel. However, other openings will be inspected, if accessible, in the interest of long term public safety.

B-02 Approve Mine Inspection Program (PMH) The Inspection Plan will be submitted to the B.C. Ministry of Mines for approval by the chief inspector of Mines under the Mines Act and the Health, Safety and Reclamation Code for Mines in British Columbia.

B-03 Execute Mine Inspection Program (PMH) Once approval of the inspection plan has been received, the mine inspection will be completed as per the approved inspection plan. Both underground and surface areas identified in the plan will be inspected. All inspections will be carried out by a geotechnical engineer and a specialist familiar with the design and construction of rehabilitation measures. A certified shift boss will accompany the inspection team for underground work.

B-04 Develop Phase 1 Rehabilitation Plan (PMH) On completion of the inspection, a detailed Phase I rehabilitation plan and cost estimate will be prepared. The plan will consider only those items that pertain to the pre-plug test investigation and the execution of the plug test. Rehabilitation will focus on the 4100 and 4150 Level tunnels. A number of contractors will be short listed at this stage to avoid delay in awarding the work.

B-05 Approve Phase 1 Rehabilitation Plan (PMH) The plan will be submitted to the B.C. Ministry of Mines for approval by the chief inspector of Mines under the Mines Act and the Health, Safety and Reclamation Code for Mines in British Columbia. Approval will also be sought from MWLAP.


SCOPE DESCRIPTION

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B-06 Implement Phase 1 Mine Rehabilitation (PMH) Once approval of the plan has been received, tender documents will be prepared and a quote will be solicited from selected contractors to complete the work. Following approval of the quote, the work will be awarded and a contract signed with the successful contractor. The contractor will mobilize equipment to the site and commence the work. Supervision of the rehabilitation will be provided by experienced geotechnical and mining engineers.

B-07 Prepare Mine Rehabilitation Program (PMH) A detailed rehabilitation plan for the remaining phases and a cost estimate will be prepared for work required to ascertain safety of the mine workings and mine infrastructure as determined by the inspection. The plan will include the items listed in B-01 and the stability of waste dumps and existing timber culverts.

B-08 Approve Mine Rehabilitation Program (PMH) The plan will be submitted to the B.C. Ministry of Mines for approval by the Chief Inspector of Mines under the Mines Act and the Health, Safety and Reclamation Code for Mines in British Columbia. Approval will also be sought from MWLAP.

B-09 Implement Phase 2 Mine Rehabilitation (PMH) Once approval of the plan has been received, the proposed work will be advertised and tender documents will be prepared. The project team will assist in the selection of a rehabilitation contractor by preparing a detailed specification, recommending bidders (if required), recommending proposal evaluation criteria, and participating in the proposal evaluation. The rehabilitation will be carried out under direct contract to MWLAP and the project team will assist in contractor selection and inspecting contractor progress. This phase of the work will focus on work that can be carried out during the execution of the plug test.

B-10 Implement Phase 3 Mine Rehabilitation (PMH) The process will mirror B-09, however, the work will focus on rehabilitation that can be carried out after the plug test is completed.

B-11 Prepare Mine Rehabilitation Report (PMH) A report on the mine safety rehabilitation work will be provided to MWLAP. Results and conclusions for this objective will be incorporated in the Mine Study and Hydrogeology Report.


SCOPE DESCRIPTION

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C HYDROLOGY

C-01 Review Hydrology Data (PMH) Consultants will review and evaluate the available hydrologic information for the Britannia Creek Basin, including creek and adit flows, climate records, and historic hydroelectric generation data.

C-02 Upgrade Flow Monitors (PMH) A detailed reconnaissance of the existing flow monitoring sites will be carried out during a site reconnaissance of the Britannia Creek Basin, including Jane Basin and the Apex and Victoria Mines area. The sites will be assessed for remote data access and security. A detailed plan, schedule and budget for remote data access and security of existing monitoring stations and provision of additional monitoring stations will be prepared based on the results of the review of the historical records. Following approval of the plan, upgrading of existing gauge stations and installation of new stations will be implemented.

C-03 Prepare Base Maps (PMH) Digital base maps will be prepared of the Britannia Creek and Furry Creek drainage basins including Jane Basin and the Apex and Victoria Mine areas tied to the historic mine survey grid and the NAD 83 UTM coordinate system. Maps will have a 10-metre contour interval. A more detailed 5-metre contour map will be prepared for the Jane Basin catchment.

C-04 Estimate Mine Inflows (PMH) Peak mine inflows and return periods will be estimated from available historical mine flows and meteorological records. The work will involve developing a series of annual hydrographs that represent the inflows to the mine workings during extreme wet years.

C-05 Finalize Hydrology Report (PMH) Results of the flow monitoring equipment upgrading and the hydrological study will be incorporated into an interim hydrological report.


SCOPE DESCRIPTION

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D FLOOD RISK

D-01 Review Precipitation and Flow Data (CDS) Precipitation and flow data will be collected and reviewed. Regional stations will provide the long-term data, and site data will be used for correlation analysis. A regional flood frequency analysis will be carried out to estimate the 200-year flood for Britannia Creek. This will comprise flood frequency analyses using flow records for basins in the region and developing a relationship between watershed characteristics and flood peaks.

D-02 Calibrate Hydrologic Model (CDS) For developing an estimate of the ‘Probable Maximum Flood’, an HEC-1 or equivalent watershed model will be developed of the basin. The model will use a design precipitation hyetograph and generate a flood hydrograph. The model will be calibrated using recorded events such as the August 1991 event. Verification of the model will be based on a different flood event.

D-03 Execute Site Surveys (CDS) A review of the watershed will be carried out to assess the influence of development on the flood hydrology. The dams constructed for hydroelectric development will be inspected. The extent of logging and road construction in the watershed will be assessed. Surveys of the reservoir areas behind the dams and typical downstream cross sections will be conducted.

D-04 Assess Debris Flow (CDS) The debris flow, debris torrent and debris flood assessment will be based on visual and air photo inspections of likely source and run out zones in the watershed. A helicopter reconnaissance will be conducted as part of this work. The downstream risk from debris flow events will be assessed.

D-05 Develop Sedimentation Analysis (CDS) The assessment of sediment sources will be made based on a site helicopter reconnaissance and air photo review. Sediment runoff will be calculated using universal soil loss equation procedures. The potential aggradation above Tunnel Dam and other structures will be estimated based on a sediment settling model.


SCOPE DESCRIPTION

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D-06 Route Flood Flows (CDS) Precipitation events of different return periods will be routed using the hydrologic model and a flood routing model, MIKE 11. The ‘probable maximum precipitation’ will be input to the model to produce the ‘probable maximum flood’ design flood hydrograph. An assessment of dam freeboard will be carried out using the flood routing model. The output will be design flows and flood levels in the lower valley.

D-07 Execute Dam Breach Analysis (CDS) The dam breach analysis will be carried out using the MIKE 11 model. The existing mapping of the town site area will be used to assess the potential impacts downstream of a potential dam failure. The dam failure will be combined with a flood event to simulate the likely simultaneous occurrence of both of these events.

D-08 Execute Downstream Flood Assessment (CDS) An assessment will be provided of the flood hazards to siting of the treatment plant, the required floodproofing elevations and possible mitigating actions against flooding. The options will be presented at a conceptual level. The results of the Flood Risk Assessment will be provided as a stand-alone appendix to the Mine Study and Hydrogeology Report.


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E MINE WATER COLLECTION

E-01 Review Water Quality Data (DEH) Water quality data will be reviewed with the specific intent of identifying sources and/or sinks in the Jane Basin and 2200 Portal areas. Data collected by Environment Canada will be collated and reviewed.

E-02 Review 2200L and Jane Basin Flow Paths (DEH) The Jane Basin and 2200 Portals will be inspected and surface flow patterns delineated. Samples of water from the area will be taken and analyzed for signature elements and isotopes. The amount and quality of water entering the mine by each flow path will be estimated.

E-03 Assess Possible Diversions (PMH) An assessment will be made of whether works within Jane Basin (such as surface diversions, soil covers or recontouring) could reduce annual 4100 Level flows enough to warrant their permitting and construction. If the study proves positive, a work plan and budget for this work will be prepared.

E-04 Review Structural Geology (PMH) Using geological maps supplemented by air photographs and mapping, a structural model of the project area, including mine workings will be developed. The hydrogeological significance of the main tectonic features will be evaluated. It is expected that the most significant concern will be whether there are structures that could allow uncontrolled discharges when the mine is used to store water. Targets for groundwater monitoring during the pump test will be identified.

E-05 Create Mine/Geology Model (PMH) Available mine data will be identified and reviewed and, as appropriate to understand and interpret the hydrological regime of the mine, a 3D digital model will be prepared of the surface and underground mine workings. The model will provide suitable planimetric features to estimate surface flows in disturbed and undisturbed catchments, provide accurate spatial representation of all connections between the underground and surface and provide a representation of the major connections and stopes throughout the mine, especially those that may be channels for water flow.


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E-06 Identify Mine Water Flow Paths (PMH) Flow paths will be determined of all contributions to 4100 Level and 2200 Level drainage flows by considering groundwater; seasonal and storm events; inflows to Jane Basin workings or other mine openings; and inflows to the 2200 Level from Furry Creek, or the Victoria shafts.

E-07 Estimate Mine Water Flows (PMH) Preliminary estimates of Water Treatment Plant feed flows from the mine will be prepared. The estimates will be based on results of the mine water inflow and flow path studies. The data will be compiled with data collected from the plug test and results incorporated into the overall water management plan (F-13).


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F MINE WATER STORAGE

F-01 Close 2200L Plug (GCO'H) The 2200 Level plug is currently under construction. It is anticipated that the plug will become operational in mid-December, 2001. The closure of the plug drain pipe will be coordinated with monitoring activities at the mine site, in particular in Britannia Creek and the 4100 Level.

F-02 Review Plug Construction Records (JGP) Records relevant to the 4100 Level plug test will be reviewed to determine the as-built plug configuration and performance of the plug during subsequent pressure testing. The review of records will also extend to relevant geology and mining records for the 4100 Level to 3250 Level zones that will be flooded. The records include documents held by CBEL, Environment Canada, Klohn Crippen and the B.C. Mines Branch. The review will include discussions with personnel involved in the plug construction.

F-03 Develop 4100L Plug Test Plan (JGP) A plan of works and procedures will be developed to encompass the safety, regulatory, geotechnical, operational and hydraulic modeling aspects involved in determining the integrity of the plug and the amount of water storage available behind the plug. A preliminary part of the plan will be the outline of the methods used in the investigation works necessary for the safety review of the geotechnical condition of the plug. This section of the plan will be submitted to the Mines Branch for early approval of the drilling component of the safety review. A second, more comprehensive plan will then be developed to cover the entire plug test with separate protocols for the hydraulic testing, water sampling, emergency and contingency procedures.

F-04 Approve 4100L Plug Safety Review (JGP) Since any works in a mine require Mines Branch approval, the drilling and remediation works associated with the investigations into the geotechnical condition of the plug will require Mines Branch approval. Since this is only approval of a notification of work and not an engineering report, approval is expected to be relatively prompt.


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F-05 Execute 4100L Plug Safety Review (JGP) The objective of the investigation will be to determine the quality of the rock mass surrounding the plug and the nature of the cement-rock contact. This will be done by extracting six diamond cores from holes angled into the tunnel wall through the front face of the plug. Permeability will be measured using packer testing; fracture frequency will be estimated by the logging and plotting of core discontinuities. Core from the plug will be tested for concrete strength and for signs of deterioration. Holes will be grouted shut with high quality non-shrinking grout. Data from the investigation will be used in the engineering report on the stability of the plug, forming part of the plug test application.

F-06 Develop 4100L Test Release Plan (JGP) Since the stored mine waters may carry significantly more metal loading than the run-of-mine water, contingency plans for the release of these waters will be developed. They may involve staged releases when impact is lowest. The release plan will consider a release schedule minimizing impact on aquatic life (salmon runs) and will be co-ordinated with monitoring programs.

F-07 Install 4100L Plug Instruments (JGP) Instrumentation needed for the plug test will include a 10 inch magnetic flow meter installed downstream of the existing gate valve and a remote controlled valve suitable for throttling the mine water flows under expected pressures. In addition, a remote indicating pressure sensor will be included to monitor reservoir head. Seepage past the plug will be collected and routed to a small remote indicating flow measuring station on the floor of the tunnel. A strain gauge type instrument will monitor deformation of the plug relative to the tunnel wall. Data from these instruments will be gathered in a data logger/controller and transmitted periodically or on command by telephone modem.

F-08 Obtain 4100L Plug Test Approvals (JGP) The comprehensive plug test plan and engineering report on the plug stability will be submitted for Owner’s review and for approval by Mines Branch and other regulators as required. As this is a significant document, approval may require implementation of additional recommendations made by the Mines Branch.


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F-09 Execute 4100L Plug Test (JGP) The plug test will consist of a co-ordinated filling of the reservoir and the monitoring or estimation of mine inflows/outflows, monitoring of any internal and external mine seepages and continual water quality monitoring of water samples at the plug, in the creeks and at nearby boreholes. The primary data will consist of systematically-acquired pressures and flow rates during filling and draining. Additional information on inflows will be obtained from staged level balancing tests which will develop mine inflow data relative to mine head. Seepage data will be used to evaluate measures required for the long term stability of the plug during water treatment plant operation. Since water inflow will be variable, the exact duration of the plug test is unknown. If natural inflow is too slow, diverting Mineral Creek into the 2700 Level may be required to meet project schedules.

F-10 Finalize Hydrogeology Report (JGP) A combined Mine Study and Hydrogeology Report will be prepared. The report will presents results from the investigations of hydrology (C-01 to C-05), mine water collection (E-01 to E-07), and mine water storage (F-01 to F-13).

F-11 Assess 4100L Plug Test (JGP) By integrating measured inflows versus time, an overall mine storage volume will be determined. Tracking the rate of rise versus time during periods of equivalent inflows will allow determination of the sectional area versus elevation of the mine workings. Based on these two analyses, a volume elevation curve will be established for the mine. In addition to assessing the hydraulic capacity of the mine, an evaluation will be made of the geotechnical performance of the plug under pressure.

F-12 Finalize 4100L Plug Test Report (JGP) The results of the plug test will be combined with the results of the hydrogeology and mine geology to assess the suitability of the plug/reservoir system for regulating seasonal water flows. The final report will include recommendations for safe operation of the reservoir including operational limits and procedures.


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F-13 Develop Water Management Plan (DEH) A feasibility level plan will be developed for management of water at the site. The plan will consider and make recommendations for diversions of clean water, routing of mine water, collection of contaminated groundwater, and storage of mine water and groundwater to equalize flows and water quality. Long term changes in flows and/or water quality will be taken into consideration. Uncertainties that could lead to problems in the Water Treatment Plant will be identified. Contingency measures will be developed.


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G WATER QUALITY

G-01 Establish Preliminary WTP Feed Quality (DEH) Preliminary estimates of Water Treatment Plant feed quality will be prepared. The estimates will be based on a detailed review of data from previous monitoring of the 4100 and 2200 Level outflows. Those data will be provided by Environment Canada. Any available data from the fan groundwater studies will be taken into consideration.

G-02 Assess Mine Contaminant Sources (DEH) Possible sources of copper and zinc in flows entering the mine will be identified and investigated. Air photos will be examined first. Then a detailed ground level reconnaissance will be completed in the Jane Basin and 2200 Level portal areas. The reconnaissance will include mapping of waste rock deposits and other possible sources, and sampling and analysis of surface flows.

G-03 Predict Mine Storage Effects (DEH) An initial prediction will be developed of the chemical effects of storing water in the mine. Data from the previous flooding tests will be reviewed and compared to data from experience at other sites (Baker, Holden). A limited sampling and testing of readily accessible mineralized rock will be completed to identify acid salts and other oxidation products, as well as possible solubility controlling phases. A thermodynamic model will be used to assess the possible effects of redox changes.

G-04 Assess Mine Routine Effects (DEH) The effects or re-routing the 2200 Level flows through the mine will be assessed. Historical records and the mine model will used to identify possible flow paths, and to identify areas where the flow could contact mineralized and oxidized zones. Initial predictions of possible increases in contaminant loads will be prepared. Outflow at the 4100 Level plug will be monitored before and after the 2200 Level plug is closed. The outflow monitoring results will be compared to the initial predictions and a narrower range of possible effects will be determined.

G-05 Design and Procure Mine Water Quality Monitors (DEH) Possibilities for monitoring water quality within the mine during the plug test will be examined. The feasibility of installing wells and/or insitu monitoring from surface and/or from accessible workings will be established. Cost estimates will be prepared for feasible methods. A monitoring system will then be selected and procured.


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G-06 Install Mine Water Quality Monitors (DEH) The mine water quality monitoring system procured In Task G-05 will be installed and commissioned.

G-07 Monitor Mine Storage Effects (DEH) The effects of storage on mine water quality will be monitored during the plug test. Samples and/or data will be collected from the monitoring system installed in Task G-06, and samples will be taken from the 4100 Level plug discharge. The resulting data will be analyzed to estimate average water quality and to identify trends that could indicate deterioration or improvement of water quality over time.

G-08 Establish Feasibility WTP Water Feed Quality (DEH) Results from the assessments of mine water and fan groundwater quality will be combined to estimate ranges of Water Treatment Plant feed quality. The possibility of equalizing contaminant loads by mixing the two flows will be assessed. The possibility of long term changes in Water Treatment Plant feed quality will be estimated.


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H WATER TREATMENT PLANT

H-01 Develop Interim Improvement Opinion (JDM) After a preliminary review of surface water flow paths across the site, streambed amendments will be considered and recommended if site conditions support their use. The considerations will focus on copper concentration in surface water, site topography, types of amendments that might be used, and potential improvements to surface water runoff that might reasonably be achieved. A brief summary report will be prepared describing expected improvements to surface water runoff from the site.

H-02 Assess Interim Improvement (JDM) The summary report from Task H-01 will be reviewed by decision-makers and by other interested parties. Written comments and questions will be addressed. If a cost estimate is needed to support decision-making, the site will be visited to verify surface water streambed locations, construction access, and (potentially) to identify actively weathering deposits that might be treated. The technical feasibility will be re-evaluated, a conceptual-level cost estimate will be prepared, and recommendations will be re-assessed. Written and verbal questions will be fielded and a meeting will be held to discuss the findings and clarify any outstanding issues. (Design criteria and performance goals will be established in a new and separate task if implementation is to be pursued).

H-03 Review Existing Permit Criteria (JDM) The existing discharge permit will be examined. Other agencies that have jurisdiction over or input into the establishment of discharge limits will be identified and contacted, and opinions will be obtained about desired and probable required discharge water quality criteria. A table of potential discharge criteria will be compiled according to agency; it will be submitted to the Project Manager for distribution to and comment from the various agencies.

H-04 Establish Discharge Objectives (JDM) Comments on the table of potential discharge criteria (from Task H-03) will be reviewed, clarified by direct discussions with the commenting agencies (through conference calls when necessary), and revised. The revised draft will be distributed to the agencies and the project team as part of the basis for Water Treatment Plant design.


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H-05 Establish Preliminary WTP Feed Rate (TF) Early estimates of the flow-equalized hydraulic feed rate from mine drainage will be obtained from previous minewater investigations (by SRK) and an early estimate of required seasonal hydraulic pumping rates from site remediation activities will be obtained from previous groundwater investigations (provided by URS). These data will be used to establish the preliminary feed flow rate for the Water Treatment Plant. The chemical composition of mine water and groundwater will also be obtained from previous studies.

H-06 Execute Lab Sulphide Assessment (JDM) A sample of the existing acid rock drainage water will be collected from the site and sent out for analysis and simulated treatment to achieve two objectives. The first objective will be to test cadmium removal (to protect offshore aquatic life). The second objective will be to verify that copper sulphide (and zinc sulphide) can be selectively precipitated and that the recovered by-product(s) will meet the acceptance criteria of smelter(s) that may “buy” the by-products.

H-07 Develop Preliminary WTP Design (TF) The Water Treatment Plant design will be developed to the preliminary level based upon the discharge objectives, the preliminary Water Treatment Plant feed rate, and the sludge management concepts. Preliminary Water Treatment Plant process design will be based on the HDS process as outlined in the RFP. It will include an estimate of required hydraulic retention time, recycle ratio, and preliminary sizing of major plant equipment, such as thickeners and sludge storage facilities.

H-08 Develop Pilot Program (JDM) The pilot program will be developed based on the preliminary Water Treatment Plant process design. The pilot testing program will also draw on previous pilot testing of the HDS process at Britannia in 1997. The program will establish the required retention time, recycle ratio, and determine the anticipated underflow density, sludge characteristics, optimal pH, lime consumption, and flocculant consumption. The available mine drainage composition information, the pretreatment process configuration, and sludge management issues will be reviewed and the process conditions most likely to meet the discharge objectives (compiled in Task H-04) will be identified. CH2M HILL will work with the Project Manager to develop and implement the program for investigating the feasibility of options for the upstream removal of metals.


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H-09 Execute Pilot Program (JDM) The pilot plants will be shipped to the site, set up and commissioned prior to test execution. The physical-chemical (primary) process will be tested first, without the pretreatment system in operation. While the primary process is undergoing this initial period of testing, the pretreatment process will be started up, optimized, and stabilized. Feed to the primary process will revert to pretreated water after the pretreatment process has stabilized and the initial tests of primary process have been completed to establish baseline conditions. Follow up testing of each process will be carried out until the essential test objectives have been achieved. After field tests are finished, data from the primary and pretreatment process tests will be analyzed.

H-10 Assess Sulphide Market (JDM) Physical and chemical characteristics of the pretreatment sulphide by-products will be provided to metal buyers at appropriate smelters to solicit their willingness to take the recovered sulphide concentrate. The smelter(s) response(s) will be documented and forwarded with recommendations to the Project Manager for review and consideration by the Ministry and other Stakeholders. The Ministry will provide direction on how to incorporate by-product recovery into the overall project.

H-11 Assess Preliminary PFS and Failure Mode (JDM) A summary report will be written on results of pilot testing, including identification of fulfilled and outstanding objectives. In addition, the initial process flowsheet on which pilot testing was based will be revisited to assess how well the pilot plants performed compared to initial expectations. Deviations from expected performance will be carefully documented and the process will be revised to address these departures. A qualitative failure mode analysis will be performed on the main elements of the primary treatment and pretreatment processes. The failure mode analysis will consider the nature of failure, the consequences of the failure, the severity of failure, preventive or corrective measures, and how the failure would manifest itself or be detected. The report will cover all the foregoing aspects.

H-12 Assess Existing Site Infrastructure (TF) Infrastructure and utilities at the mine and town site will be assessed to establish a basis for evaluation of what will be required to service the new Water Treatment Plant facility. The evaluation will include electrical, water, sanitary sewer, and a physical inspection of the existing mine water feed and discharge pipelines. The assessment will also provide a basis for evaluating whether it would be potentially feasible to retain all or part of the existing discharge pipeline and the development of preliminary outfall recommendations.


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H-13 Develop Conceptual Site Layout (TF) A conceptual treatment plant site layout (i.e. footprint) will be developed based on the discharge objectives, the preliminary feed rate, sludge management concepts, and the preliminary Water Treatment Plant design. It will be based on the preliminary sizing of the larger process equipment, and will include sufficient space for plant ancillary facilities.

H-14 Hold Stakeholder Workshop (TF) In order to develop a single set of siting criteria acceptable to all parties, a stakeholder workshop will be held in Britannia to seek input from all affected parties. The workshop will attempt to identify conflicting objectives quickly and resolve as many as possible. The objective for the meeting will be to develop the siting criteria by identifying the “musts”, and establishing the basis for rating the “wants” concerning Water Treatment Plant siting and design. This will become the framework for the site selection analysis.

H-15 Identify Potential WTP Sites (TF) A list of potentially-feasible sites for the Water Treatment Plant will be identified based on the conceptual plant site layout (footprint). Information will be collected that will enable the potentially-feasible Water Treatment Plant sites to be evaluated and short listed. This information will include utility requirements, potential impacts on nearby residential and commercial areas, impacts of increased traffic and requirements for roadworks, architectural requirements, and order-of-magnitude costs.

H-16 Develop Preliminary Plant Layout (TF) A preliminary-level Water Treatment Plant layout will be developed, based on the selected site, the preliminary Water Treatment Plant process design, and the size of larger process equipment, such as the sludge thickener and the short-term sludge storage facilities. The equipment will be arranged in a plant layout that also includes plant ancillary facilities, chemical delivery, sludge handling, employee and visitor parking, etc.


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H-17 Select WTP Plant Site (TF) A preliminary screening of potentially-feasible Water Treatment Plant plant sites will be conducted using the ‘must’ and ‘want’ criteria developed at the Stakeholder workshop. For the short-listed Water Treatment Plant sites, utility requirements, potential impacts on nearby residential and commercial areas, impacts of increased traffic and requirements for roadworks, architectural requirements, and order-of-magnitude costs will be estimated. Each of the short-listed sites will be scored against the evaluation criteria, and the ranking will be reviewed with the Project Manager.

H-18 Finalize Discharge Criteria (JDM) With input from pilot testing, projections of future mine water and groundwater quality and quantity, the Ministry, and requirements and preferences of affected agencies and from stakeholders in general, the discharge objectives will be revised, if warranted, and redistributed for independent review. After review and comment by affected parties, a meeting will be held to discuss any outstanding issues in order to arrive at a (proposed) set of finalized discharge criteria that can be submitted for formal acceptance.

H-19 Establish WTP Design Criteria (JDM) Other activities that are conducted in parallel with work on the Water Treatment Plant will provide information about the nominal and maximum hydraulic flow rates of mine water and groundwater that must be treated in the Water Treatment Plant . Related parallel work will supply the nominal and extreme concentrations of constituents expected in mine water and groundwater. Sludge disposal options, pilot plant test results (design data), discharge criteria, good engineering practices, and prior experience will be used in connection with mine and ground water characteristics to establish preliminary design criteria for the Water Treatment Plant . These preliminary criteria will be summarized and distributed for review and comment before being finalized in a brief design basis memorandum.

H-20 Finalize PFD (TF) The Water Treatment Plant process flow diagram will be finalized based on the final discharge criteria, the Water Treatment Plant design criteria, and the most promising sludge management option. The PFD will include the flow and material balances for the sludge management scheme selected.


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H-21 Execute Site Investigations (TF) Following approval of the selected site by the Project Manager and regulators, geotechnical site investigations will be executed to determine the foundation requirements for the Water Treatment Plant . The investigation will include a drilling program and a site survey. The program will deliver recommendations for foundation types, acceptable bearing pressures, and an assessment of the potential for seismically-induced liquifaction. This information will feed into the capital cost estimates and the Water Treatment Plant feasibility report.

H-22 Develop WTP Infrastructure Design (TF) Feasiblity-level design will be developed for infrastructure requirements for the selected site. The design will include utilities, feed water delivery pipelines, discharge pipelines, access for vehicles delivering reagents, access for vehicles hauling sludge, and access for plant workers and the public. An investigation will be made of the potential need for improved intersection design to address traffic issues related to truck traffic entering from Highway 99. The SLRD will be consulted to determine how to connect with community water and sewer lines, and for recommendations on other planning and zoning issues.

H-23 Develop WTP Feasibility Design (TF) Feasibility-level design will be developed to address the following Water Treatment Plant issues: flexibility of Water Treatment Plant design capacity in relation to future flow changes; control of mine flows during plant shutdowns; location, size, and general appearance of the Water Treatment Plant; instrumentation and O&M requirements which affect the Water Treatment Plant feasibility; location, size and capacity of supply and discharge pipelines; sources for, cost, and expected life of key plant equipment and components; sources of lime, on site handling and the disposal of slaker grit; means of handling and management of HDS sludge; and changes needed for highway access, zoning, and planning issues.

H-24 Estimate WTP Costs (TF) Detailed feasibility-level capital and operating cost estimates will be developed for the Water Treatment Plant and for the associated infrastructure and facilities.


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H-25 Develop Draft WTP Report (TF) A draft Water Treatment Plant Feasibility Report will be developed. It will address advance planning for provision of electrical and utilities services; evaluation of capital costs versus operating cost strategy tradeoffs; required staffing levels and potential operation by museum staff; facility safety and security; and steps needed to secure approvals under the Mines Act, Waste Management Act, and others, if necessary.

H-26 Execute CEO Review (TDL) A “Capital Efficiency Optimization” review of the project will be made to identify potential cost opportunities and risks. The CEO review will be based on the Draft Water Treatment Plant Report for the project. The magnitude of the opportunities and risks will be estimated and evaluated using NPV engineering principles, and a path-forward will be developed for each item. The CEO review will promote a disciplined balance between the operating and capital costs, and will be a rational basis of a risk mitigation plan.

H-27 Review Draft WTP Report (TF) Draft Water Treatment Plant Feasibility Report will be reviewed by Project Manager and others as appropriate.

H-28 Issue WTP Feasibility Report (TF) The review comments will be addressed, the report will be revised as necessary, and the final Water Treatment Plant Feasibility Report will be issued.


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J SLUDGE MANAGEMENT

J-01 Develop Sludge Concepts (TF) Earlier work will be reviewed, and screening-level concepts will be developed for storage and management of HDS sludge on Britannia lands. The concepts may include short-term storage at the Water Treatment Plant site, and longer-term storage elsewhere on Britannia lands. These concepts will be further developed into options after the completion of the pilot study.

J-02 Assess Sludge Quality and Quantity (JDM) Pilot and laboratory test results and preliminary water quality projections will be reviewed to estimate the mass, volume, composition, and characteristics of sludge from the treatment process(es). The characteristics will be compiled in a brief technical memorandum and distributed for information and further evaluation.

J-03 Develop Sludge Options (TF) The sludge management concepts (developed in J-01) will be developed further into options for short, medium and long-term storage/management of sludge on Britannia lands or off-site as appropriate. The options may include short-term storage at the Water Treatment Plant site, and longer-term storage elsewhere on Britannia lands or off-site. Development of these options will be in relation to the preliminary Water Treatment Plant design performed in relation to preliminary sulphide by-product assessments under lab sulphide assessment (H-06), preliminary Water Treatment Plant design (H-07), and the results from pilot testing (H-09, H-10).

J-04 Evaluate Sludge Options (TF) To gain broad-based acceptance of the objectives, evaluation criteria, evaluation process, and final selection of sludge management scheme, the Stakeholders will be engaged early to identify ‘musts’ and establish the basis for rating the ‘wants’ concerning sludge management. This exercise will establish the framework for the selection analysis. It is expected that this will include, at a minimum, an analysis of effectiveness, economics and residual risk. Preliminary layouts and typical sections will be prepared for the preferred alternative, and a feasibility-level estimate will be developed of capital and operating costs. A flow sheet complete with a material and flow balance will be developed for the selected sludge management scheme. The feasibility of recovering metal-rich by products will also be assessed.


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K FAN HYDROGEOLOGY

K-01 Execute Historical Review (DMW) A historical review of the Britannia Mine site will be conducted under the guidelines of a CSR Stage I PSI (Preliminary Site Investigation). The goal of the historical review will be to identify potential compounds and areas of contamination that were created during the life of the mine. The review will include both the fan area and the additional areas outside of the fan. Results of the review will be used to develop work plans for the Fan DSI (Detailed Site Investigation) and the Additional Areas PSI.

K-02 Develop Surface Work Plan (DMW) Using the findings of the Historical Review, the results of the Screening Level Risk Assessment and any other relevant information, work plans will be developed to further assess the contaminated sites and potentially contaminated sites potential of the Britannia Mine area. Two work plans will be developed; a Detailed Site Investigation (DSI) for the fan area (including the adjacent intertidal zone), and a Preliminary Site Investigation (PSI) for areas outside of the fan (including the intertidal zone) suspected of contamination originating from the Britannia Mine site.

K-03 Install Fan Aquifer Test Wells (DMW) Eleven groundwater monitoring wells will be installed at pre-determined locations on the Britannia fan. In addition, two groundwater extraction wells will be installed in the fan area west of Highway 99. Where possible, monitoring and extraction wells will be installed using the high frequency Vibra Sonic drilling method, which will enable the collection of continuous soil cores throughout the drilling profile. Continuous soil cores will be logged in the field by a geologist. Field logs will include observations of soil texture, colour, moisture content, and the degree of oxidation or staining, which will be useful in the interpretation of whether any subsurface materials may comprise tailings or other mine waste materials.

K-04 Conduct Fan Baseline Aquifer Study (DMW) Pressure transducers will be employed for the acquisition of 72 hours of pre-pumping test water level data. This data will be reduced using the 72 hour method for determining mean elevations in tidally-influenced aquifers. Immediately prior to the start of the pumping test, transducers will be programmed to record at one second (or less) time intervals, so the response in each well due to pumping may be readily observed.


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K-05 Execute Fan Pump Tests (DMW) The extraction well(s) will be pumped at a maximum rate of 100 USgpm (545 m3/d). The pump test will be run for several hours, sufficient time to produce measurable drawdowns in adjacent monitoring wells while generating a lower volume of contaminated water that would need to be either re-injected or disposed of in the mine. Approval will be sought from BCMWLAP for the disposal of the pump test water. In addition, slug tests will be performed in up to ten monitoring wells to supplement the information gained through the pumping tests. Similar methods for filtering tidal signals as those used for the pumping tests will be applied to slug test data to ensure that tidal interference is minimised.

K-06 Develop Fan Groundwater Model (DMW) The data obtained from the hydrogeological assessment will be used for flux calculations, and to assess the pumping rates required to achieve the control and containment of contaminant plumes, based on a predictive numerical model (MODFLOW/MODPATH) that will be calibrated to the pump test data. The numerical model will also be used in the evaluation of alternative remedial strategies for the site (e.g., pump and treat with barriers, pump and treat with re-injection). The model will also be used to simulate plume behaviour with seasonally variable pumping rates.

K-07 Monitor Fan Test Wells (DMW) Prior to the start of the 4100 Level plug test, continuous groundwater elevation measurement will be initiated in monitoring wells across the fan area using pressure transducers. Monitoring will continue for the duration of the plug test. The transducer data will be downloaded weekly. Groundwater quality monitoring may also be used to quantify impacts from the plug test and will be utilized in the Fan Area DSI. Near-bottom water samples will be obtained from the fan area foreshore, to infer the degree to which groundwater seepage is impacting the intertidal zone of the foreshore.

K-08 Assess Impact of 4100L Plug Test (DMW) The fan groundwater elevation data and groundwater quality will be evaluated for the effects on fan groundwater of using the mine as a storage reservoir.


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K-09 Execute Additional Areas (AA) PSI (DMW) Following the work plan developed for the Additional Areas PSI, fieldwork will be conducted to investigate and collect samples from terrestrial and intertidal sites in the additional areas suspected of being contaminated. The goal of the Additional Areas PSI is to identify contaminated sites locations that will require a detailed investigation for remediation under the CSR.

K-10 Develop DSI Work Plan (DMW) Using the results of the Additional Areas PSI, a work plan will be created to carry out a detailed site investigation in the Additional Areas. Detailed site investigations generally involve a more in-depth characterization of contamination at a site that will lead to the development of remediation techniques to remove or mitigate the source of contamination.

K-11 Execute Additional Area Water Tests (DMW) As part of the Additional Areas DSI, porewater and surface water suspected of contamination will be sampled and tested. The work will provide data for the identification and remediation of any suspected contaminant sources. The program may involve the installation of piezometers in selected location across the site for groundwater sampling, and the sampling and analysis of surface streams and seepages.


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L CONTAMINATED SOILS

L-01 Sample Britannia Creek (DMW) As part of the Fan Area DSI, stream sediment and water samples will be collected from the streambed of Britannia Creek and analysed for metals. Analytical results will be used to determine the present day metal concentrations in the creek, and to potentially identify any groundwater sources in the fan that may be contributing metals load to the creek. These results will be incorporated into the fan area risk assessments.

L-02 Sample Fan Surficial Soils (DMW) A screening surficial soil sampling program will be completed in the fan area. This will consist of the collection of approximately 500 shallow soil samples from randomly stratified coordinates within a grid consisting of 20 x 20 m cells. The goal of the survey will be to identify metal contaminated ‘hot-spots’ and to clarify which parts of the near-surface fan may be source areas for metallic contaminants. The hot-spots will be re-evaluated by a step-out test pit program.

L-03 Execute Fan Test Pit Program (DMW) A test pit program will be used to further define the extent of hot-spots identified through the surficial screening program, and through any relevant information found during the historical review. A backhoe will be used to excavate, in locations acceptable to stakeholders, up to 25 test pits in the fan area. Samples will be analysed for metals, acid-base accounting parameters, hydrocarbons and/or other parameters as necessary. Intertidal sediments and tailings will be sampled, if determined to be necessary in the planning stage, to provide data in support of risk assessment.

L-04 Prepare Fan DSI Report (DMW) A Detailed Sites Investigation (DSI) report will be prepared containing the results of the investigations carried out in the Fan Area. A draft DSI report, in a format consistent with MWLAP CSR requirements, will be prepared and submitted for review. Following the review process, a final DSI report will be prepared and submitted to MWLAP.


SCOPE DESCRIPTION

U747A Page 2 - 29

L-05 Sample Additional Areas Soils and Waste Rock (DMW) As part of the Additional Areas DSI, soils and waste rock will be collected and analysed. The sites will be identified during the Additional Areas PSI, but will likely focus on the Mt. Shear/2200 Level portal area. Soils analysis may include total metals, leachable metals and/or hydrocarbons. Waste rock samples will be collected from waste dumps and analysed for acid-base accounting parameters plus total and leachable metals. Drilling and test pitting may be utilized to understand the extent and variability of contamination.

L-06 Execute Additional Areas Test Pit Program (DMW) A test pit program will be used to further define the extent of potential contamination identified in the Additional Areas PSI. A backhoe will be used to excavate, in locations acceptable to stakeholders, up to 25 test pits in the additional areas, likely to be focussed on the Mt. Shear/2200 Level portal area. Samples will be analysed for metals, acid-base accounting parameters, hydrocarbons and/or other parameters as necessary.

L-07 Prepare Additional Areas DSI Report (DMW) A Detailed Sites Investigation (DSI) report will be prepared containing the results of the investigations carried out in the additional areas. This will include the results of investigations carried out both in the uplands and marine areas, as required. A draft DSI report, in a format consistent with MWLAP CSR requirements, will be prepared and submitted for review. Following the review process, a final DSI report will be prepared and submitted to MWLAP.


SCOPE DESCRIPTION

U747A Page 2 - 30

M RISK ASSESSMENT

M-01 Execute Risk Screening Assessment (DMW) The Screening Level Risk Assessment screens representative concentrations of contaminants found in soil, groundwater and intertidal sediment media against appropriate standards and guidelines. The result of this effort will be a description of the contaminants that present the potential for risk to humans and ecological receptors, as well as an understanding of the magnitude by which these PCOCs exceed relevant standards and guidelines. This information will be used to help design a more focused and cost-effective Fan Area DSI and Additional Areas PSI. Information on subtidal sediment contamination will also be reviewed to allow for integration with the Sediment Geophysical Survey (P-01) and Marine Sediment DSI (P-07) carried out by others.

M-02 Execute Fan Ecological Risk Assessment (DMW) A Tier 1 risk assessment will be conducted using the B.C. Tier 1 Guidelines for Ecological Risk Assessment (ERA) and appropriate USEPA guidance documents. The intertidal sediments will be included in this assessment. The risk assessment will also provide an indication of risk inherent to both on-site and off-site aquatic life from exposure to contaminated surface waters or groundwater, and the degree of control/capture or treatment required to mitigate these risks.

M-03 Execute Fan Human Health Risk Assessment (DMW) A Tier 1 Human Health Risk Assessment will be conducted using the B.C. Phase 1 Guidelines for Human Health Risk Assessment (HHRA), for the fan area as outlined above. Intertidal sediments will be included in this assessment.

M-04 Develop Subtidal Sediment Risk Assessment (DMW) Ecological Risk Assessments will be carried out on subtidal marine sediments by others. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).

M-05 Execute Additional Areas Ecological Risk Assessment (DMW) Ecological risk assessments will be carried out on the upland (including intertidal) components of the Additional Areas. The risk assessment will be conducted using the B.C. Tier 1/Phase 1 Guidance.


SCOPE DESCRIPTION

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M-06 Execute Additional Areas Human Health Risk Assessment (DMW) Human Health Risk Assessments will be carried out on the terrestrial components of the Additional Areas. The risk assessment will be conducted using the B.C. Tier 1 Guidelines for Human Health Risk Assessment. Upcoming guidance on conducting risk assessments for mine sites may be applied if available.


SCOPE DESCRIPTION

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N REMEDIATION PLANS

N-01 Develop Fan Remediation Plan (DMW) A Remediation Plan will be developed for the fan area consistent with the definition provided in CSR Section 1, including a summary of areas and contaminants of concern, evaluating various remedial options that may be applicable from a technical and cost perspective, an evaluation of the applicability and effects of the remediation on regulatory aspects, and a proposed monitoring program.

N-02 Develop Additional Areas Remediation Plan (DMW) A remediation plan will be developed for upland and intertidal Additional Areas based on information gathered in previous phases of work. The plan will address the requirements of the Waste Management Act and Contaminated Sites Regulation. Remediation options will be quantified and assessed for suitability based on practicality, cost, integration with plans from the mine water management and treatment projects, long-term performance, regulatory and social acceptability, future land use, and other criteria considered relevant in consultation with BCMWLAP and their representatives. Options will be compared and assessed based on conceptual designs.


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P SEDIMENTS

P-01 Execute Sediment Geophysical Surveys (RGM) The distribution of subtidal mine tailings within a depth of thirty metres will be mapped by others. It is anticipated that this program will include micro-seismic and sidescan sonar arrays with the signals integrated in a GIS platform already developed for existing seabed imaging. Cores will be collected during the geophysical survey to confirm interpretations of sediment character and allow estimation of sedimentation rates using isotope dating techniques. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).

P-02 Assess Sediments’ Effects (DMW) The potential risks posed by tailings and sediments in the intertidal zone will be evaluated on the basis of a literature review. Findings from the screening level risk assessment (M-01) will be incorporated. The potential risks posed by tailings and sediments in the subtidal zone will be evaluated (by others) on the basis of a literature review. Others will assess potential risks posed by tailings and sediments in the subtidal zone and available results from this work will be integrated into the Additional Areas risk assessment, M-05. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this component of this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).


SCOPE DESCRIPTION

U747A Page 2 - 34

P-03 Execute Sediment Biological Surveys (RGM) A subtidal benthic invertebrate community survey will be designed by others. It is anticipated that this will form part of the subtidal DSI (P-07) and will use existing data on sediment chemistry and seabed imaging to select locations for replicate sediment grab samples. Taxonomic identification and numeration of these collections together with control samples from an uncontaminated or control site will assess the health of the benthic community, and provide samples for sediment and porewater chemistry, particle sizing, and toxicity using laboratory invertebrate test species. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).

P-04 Review Existing Subtidal Information (DMW) Information available on physical and chemical fate and behaviour of subtidal sediments will be evaluated by others. Information considered in this review will include data on studies completed to date (by others) and from the screening level risk assessment. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).

P-05 Identify Gaps in Subtidal Information (DMW) Available information pertinent to the risk evaluation of subtidal sediments will be compiled and evaluated for data gaps by others. Deficiencies will be identified and resolution incorporated into the Subtidal DSI Work Plan. The full extent of the Off-Site Waterbodies DSI will be determined (by others) following review of the upcoming DOE sediment data and the Screening Level Risk Assessment for Additional Areas. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).


SCOPE DESCRIPTION

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P-06 Develop Subtidal Work Plan (GCO’H) Environment Canada (EC) and Department of Fisheries and Oceans (DFO) are jointly developing a work plan for investigation of the subtidal sediments (a workshop was conducted on September 21, 2001). This work plan will include M-04, P-01, P-02 (part), P-03, P-04, P-05, P-07 (part), P-08 and P-09. The work plan will be consolidated into a Statement of Work (SOW) for selecting and hiring a contractor to perform the work. The plan will encompass benthic community surveys, bioassays and sediment chemistry. The focus will be on the near-shore areas with the purpose of providing information for the subsequent aquatic risk assessment and sediment management plan.

P-07 Execute Marine Sediments DSI (DMW) Execution of the subtidal DSI (scope to be determined), will be undertaken by others. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this component of this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work). The Fan Area/Additional Areas intertidal sediments investigation is expected to require collection of 30 surface sediments and 5 one metre deep subsurface cores. Surficial samples (0 ~ 10 cm) will be collected using a full sized Ponar grab. Deep cores will be collected using a gravity corer or vibracorer at predetermined intervals. Surficial and subsurface sediments will be leach tested for their potential to release metals. If necessary, toxicity testing of surficial sediments at 8 stations be conducted on areas demonstrating more severe metal contamination (from DOE data review) using the marine amphipod Eohaustorius estuarius and polychaete Neanthese arenaceodenta, with chronic lethal/sublethal (growth/reburial) test-endpoints for both organisms. For comparison, toxicity testing will also be performed on sediments from two non-mine-impacted reference areas in Howe Sound. Benthic macroinvertebrate surveys (density and diversity) may be included as a tertiary line of evidence for the Tier 1 ERA, if determined to be necessary.


SCOPE DESCRIPTION

U747A Page 2 - 36

P-08 Develop Subtidal Sediments DSI Report (DMW) A Subtidal Sediments DSI report will be prepared (by others). (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this component of this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work). The Additional Areas (intertidal) sediments investigation report will be submitted with the remediation plan for the Additional Areas. This report will meet the requirements of the Waste Management Act and Contaminated Sites Regulation.

P-09 Develop Sediment Management Plan (DMW) A sediment management plan will be developed for the intertidal sediments in a manner consistent with CSR requirements for a remediation plan, incorporating the available findings of the subtidal sediment DSI and Risk Assessment phases of work. Options and costs for management of subtidal sediments will be considered. A sediment management plan will be developed for the subtidal sediments by others. (Although integral to the overall remedial work associated with the Britannia Mine Remediation Project, this component of this work package will be undertaken outside the Province’s scope of work. It is included here to indicate interaction and relationship with remedial activities included in the Province’s scope of work).


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Q COMPLIANCE

Q-01 Develop Permitting Strategy (PLE) The Ministry of Water Land and Air Protection (MWLAP), Ministry of Energy and Mines (MEM), and the project manager will jointly develop a permitting strategy. The strategy will identify remedial actions requiring authorization under the Mines Act (MEM jurisdiction) or Waste Management Act (MWLAP jurisdiction), outline technical information necessary to enable approval of identified remedial actions and identify key project staff (consultants) and Ministry technical staff responsible for preparing and processing applications. The strategy will include options for streamlining the regulatory review process through issuance, where possible, of “blanket" authorizations for similar or related activities and identify where technical information can be packaged to minimize multiple submissions requiring regulatory approval. The strategy will also establish a communications procedure to help ensure timely reviews and regulatory feedback to project staff.

Q-02 Develop Permitting Schedule (PLE) A permitting schedule will be developed in conjunction with the development of the permitting strategy and the overall project work plan. The schedule will identify early start times, latest start times and expected duration of the regulatory review period for approval of specified remedial actions. This information will provide project staff with a mechanism to avoid unnecessary delays in commencing work.

Q-03 Develop EPC Permitting Schedule (GCO'H) As remedial planning and feasibility progresses, a schedule will be developed for appropriate permitting for the EPC phase of remedial works implementation.


SCOPE DESCRIPTION

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R SITE WIDE MONITORING

R-01 Develop Monitoring Program (GCO'H) A site wide surface water monitoring program will be developed and coordinated with other (task-specific) monitoring programs at the site to establish the conditions prior to, during and post implementation of significant site works. The plan will define the sampling locations, frequency of sampling, and the parameters to be analyzed for. The monitoring scope will cover requirements not met by the scope of testing included in the separate contracts, and will specifically address the potential effects on the water quality of Britannia Creek and surface water seeps, in relation to the installation of the 2200 Level plug.

R-02 Implement Monitoring Program (GCO'H) The sampling program will be initiated immediately in order to collect sufficient data before the 2200 Level plug is installed, and prior to other significant site works. The sampling stations will be monitored and the results reported regularly over the duration of the project.


SCHEDULE

U747A Page 3 - 01

SCHEDULE FORMATS The ESP Master Schedule for the Britannia Mine Remediation Project is presented in this report in three different formats: • A 5-page tabulation of the work packages which describes the early start and finish

dates, the late start and finish dates, the duration, and the total float for each activity; it is included on Pages 3-02 to 3-06 of this report.

• A 7-page detailed bar chart, in color, of all work packages sorted by project areas. It is

a simple and clear presentation of all of the work packages, sorted in the usual early start-early finish fashion; it can be found following Page 3-06.

• A large Time-Scaled Logic Diagram of all work packages, grouped by Work Area. This

format is similar to the bar charts above, but the logic links have been included. The schedule was created in landscape format, and can be found in the plastic pocket at the back of this report.

In addition, a 1-page Project Overview Schedule is included in this Action Plan. It can be found following Page 1-06 in the Summary.


SCHEDULE

U747A Page 3 - 02

Activity

ID Activity Description

Early Start

Early Finish

Late Start

Late Finish

Orig. Duration

Total Float

A PROJECT ADMINISTRATION

A-01 Mobilize Project Website 05-Nov-01 09-Nov-01 05-Nov-01 09-Nov-01 5 0

A-02 Establish Expenditure Guidelines 05-Nov-01 16-Nov-01 05-Nov-01 16-Nov-01 10 0

A-03 Develop Health and Safety Plans 05-Nov-01 16-Nov-01 05-Nov-01 16-Nov-01 10 0

A-04 Resolve Contracts 05-Nov-01 23-Nov-01 05-Nov-01 23-Nov-01 15 0

A-05 Develop Consultation Plan 05-Nov-01 23-Nov-01 05-Nov-01 23-Nov-01 15 0

A-06 Develop Standing Offer Eligibility List 05-Nov-01 14-Dec-01 05-Nov-01 14-Dec-01 30 0

A-07 Develop Economic Model 05-Nov-01 30-Nov-01 23-Apr-02 20-May-02 20 115

A-08 Develop Project Execution Strategy 05-Nov-01 04-Feb-02 23-Apr-02 15-Jul-02 60 115

A-09 Develop WTP Operating Strategy 05-Nov-01 04-Feb-02 23-Apr-02 15-Jul-02 60 115

A-10 Establish Operating Philosophy 05-Nov-01 04-Feb-02 23-Apr-02 15-Jul-02 60 115

A-11 Acquire Land Rights 18-Jun-02 09-Sep-02 21-Oct-02 20-Jan-03 60 89

B MINE INSPECTION and REHAB

B-01 Develop Mine Inspection Plan 05-Nov-01 09-Nov-01 05-Nov-01 09-Nov-01 5 0

B-02 Approve Mine Inspection Program 12-Nov-01 16-Nov-01 12-Nov-01 16-Nov-01 5 0

B-03 Execute Mine Inspection Program 19-Nov-01 21-Nov-01 19-Nov-01 21-Nov-01 3 0

B-04 Develop Phase 1 Rehabilitation Plan 22-Nov-01 23-Nov-01 22-Nov-01 23-Nov-01 2 0

B-05 Approve Phase 1 Rehabilitation Plan 26-Nov-01 07-Dec-01 26-Nov-01 07-Dec-01 10 0

B-06 Implement Phase 1 Mine Rehabilitation 10-Dec-01 07-Jan-02 10-Dec-01 07-Jan-02 15 0

B-07 Prepare Mine Rehabilitation Program 22-Nov-01 05-Dec-01 29-Nov-01 12-Dec-01 10 5

B-08 Approve Mine Rehabilitation Program 06-Dec-01 10-Jan-02 13-Dec-01 17-Jan-02 20 5

B-09 Implement Phase 2 Mine Rehabilitation 11-Jan-02 07-Feb-02 18-Jan-02 14-Feb-02 20 5

B-10 Implement Phase 3 Mine Rehabilitation 08-Feb-02 21-Mar-02 11-Nov-02 20-Dec-02 30 196

B-11 Prepare Mine Rehabilitation Report 22-Mar-02 11-Apr-02 23-Dec-02 20-Jan-03 15 196

C HYDROLOGY

C-01 Review Hydrology Data 05-Nov-01 16-Nov-01 03-Dec-01 14-Dec-01 10 20

C-02 Upgrade Flow Monitors 19-Nov-01 30-Nov-01 17-Dec-01 07-Jan-02 10 20

C-03 Prepare Base Maps 05-Nov-01 23-Nov-01 10-Dec-01 07-Jan-02 15 25

C-04 Estimate Mine Inflows 03-Dec-01 14-Dec-01 08-Jan-02 21-Jan-02 10 20

C-05 Finalize Hydrology Report 17-Dec-01 07-Jan-02 07-Jan-03 20-Jan-03 10 264

D FLOOD RISK

D-01 Review Precipitation and Flow Data 05-Nov-01 16-Nov-01 26-Feb-02 11-Mar-02 10 75

D-02 Calibrate Hydrologic Model 19-Nov-01 14-Dec-01 12-Mar-02 08-Apr-02 20 75

D-03 Execute Site Surveys 17-Dec-01 07-Jan-02 09-Apr-02 22-Apr-02 10 75

D-04 Assess Debris Flow 17-Dec-01 14-Jan-02 30-Apr-02 20-May-02 15 90

D-05 Develop Sedimentation Analysis 17-Dec-01 14-Jan-02 30-Apr-02 20-May-02 15 90

D-06 Route Flood Flows 08-Jan-02 28-Jan-02 30-Apr-02 20-May-02 15 80

D-07 Execute Dam Breach Analysis 08-Jan-02 04-Feb-02 23-Apr-02 20-May-02 20 75

D-08 Execute Downstream Flood Assessment

05-Feb-02 25-Feb-02 21-May-02 10-Jun-02 15 75


SCHEDULE

U747A Page 3 - 03

Activity ID

Activity Description Early Start

Early Finish

Late Start

Late Finish

Orig. Duration

Total Float

E MINE WATER COLLECTION

E-01 Review Water Quality Data 05-Nov-01 09-Nov-01 17-Dec-01 21-Dec-01 5 30

E-02 Review 2200L & Jane Basin Flow Paths

12-Nov-01 16-Nov-01 01-Jan-02 07-Jan-02 5 30

E-03 Assess Possible Diversions 19-Nov-01 30-Nov-01 08-Jan-02 21-Jan-02 10 30

E-04 Review Structural Geology 05-Nov-01 30-Nov-01 10-Dec-01 14-Jan-02 20 25

E-05 Create Mine/Geology Model 05-Nov-01 30-Nov-01 10-Dec-01 14-Jan-02 20 25

E-06 Identify Mine Water Flow Paths 03-Dec-01 07-Dec-01 15-Jan-02 21-Jan-02 5 25

E-07 Estimate Mine Water Flows 17-Dec-01 14-Jan-02 22-Jan-02 11-Feb-02 15 20

F MINE WATER STORAGE

F-01 Close 2200L Plug 14-Dec-01 14-Dec-01 14-Dec-01 14-Dec-01 1 0

F-02 Review Plug Construction Records 05-Nov-01 09-Nov-01 03-Dec-01 07-Dec-01 5 20

F-03 Develop 4100L Plug Test Plan 12-Nov-01 23-Nov-01 10-Dec-01 21-Dec-01 10 20

F-04 Approve 4100L Plug Safety Review 26-Nov-01 30-Nov-01 01-Jan-02 07-Jan-02 5 20

F-05 Execute 4100L Plug Safety Review 08-Jan-02 11-Feb-02 08-Jan-02 11-Feb-02 25 0

F-06 Develop 4100L Test Release Plan 26-Nov-01 30-Nov-01 05-Feb-02 11-Feb-02 5 45

F-07 Install 4100L Plug Instruments 08-Jan-02 11-Feb-02 29-Jan-02 04-Mar-02 25 15

F-08 Obtain 4100L Plug Test Approvals 12-Feb-02 04-Mar-02 12-Feb-02 04-Mar-02 15 0

F-09 Execute 4100L Plug Test 05-Mar-02 10-Jun-02 05-Mar-02 10-Jun-02 70 0

F-10 Finalize Hydrogeology Report 25-Jun-02 08-Jul-02 07-Jan-03 20-Jan-03 10 134

F-11 Assess 4100L Plug Test 04-Jun-02 24-Jun-02 04-Jun-02 24-Jun-02 15 0

F-12 Finalize 4100L Plug Test Report 25-Jun-02 08-Jul-02 07-Jan-03 20-Jan-03 10 134

F-13 Develop Water Management Plan 25-Jun-02 15-Jul-02 25-Jun-02 15-Jul-02 15 0

G WATER QUALITY

G-01 Establish Preliminary WTP Feed Quality

05-Nov-01 16-Nov-01 12-Nov-01 23-Nov-01 10 5

G-02 Assess Mine Contaminant Sources 05-Nov-01 16-Nov-01 20-Dec-01 10-Jan-02 10 33

G-03 Predict Mine Storage Effects 19-Nov-01 23-Nov-01 11-Jan-02 17-Jan-02 5 33

G-04 Assess Mine Routine Effects 13-Dec-01 14-Feb-02 18-Jan-02 14-Mar-02 40 20

G-05 Design & Procure Mine Water Quality Monitors

05-Nov-01 30-Nov-01 18-Jan-02 14-Feb-02 20 48

G-06 Install Mine Water Quality Monitors 08-Feb-02 07-Mar-02 15-Feb-02 14-Mar-02 20 5

G-07 Monitor Mine Storage Effects 12-Mar-02 24-Jun-02 15-Mar-02 27-Jun-02 75 3

G-08 Establish Feasibility WTP Water Feed Quality

25-Jun-02 15-Jul-02 25-Jun-02 15-Jul-02 15 0


SCHEDULE

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Activity ID


Early Finish

Late Start

Late Finish

Orig. Duration

Total Float

H WATER TREATMENT PLANT

H-01 Develop Interim Improvement Opinion 05-Nov-01 07-Nov-01 05-Nov-01 07-Nov-01 3 0

H-02 Assess Interim Improvement 08-Nov-01 19-Dec-01 08-Nov-01 19-Dec-01 30 0

H-03 Review Existing Permit Criteria 05-Nov-01 06-Nov-01 22-Nov-01 23-Nov-01 2 13

H-04 Establish Discharge Objectives 07-Nov-01 13-Nov-01 26-Nov-01 30-Nov-01 5 13

H-05 Establish Preliminary WTP Feed Rate 05-Nov-01 16-Nov-01 12-Nov-01 23-Nov-01 10 5

H-06 Execute Lab Sulphide Assessment 19-Nov-01 23-Nov-01 26-Nov-01 30-Nov-01 5 5

H-07 Develop Preliminary WTP Design 26-Nov-01 14-Dec-01 03-Dec-01 21-Dec-01 15 5

H-08 Develop Pilot Program 17-Dec-01 14-Jan-02 01-Jan-02 21-Jan-02 15 5

H-09 Execute Pilot Program 15-Jan-02 08-Apr-02 22-Jan-02 15-Apr-02 60 5

H-10 Assess Sulphide Market 09-Apr-02 15-Apr-02 18-Jun-02 24-Jun-02 5 50

H-11 Assess Preliminary PFS and Failure Mode

18-Jun-02 08-Jul-02 25-Jun-02 15-Jul-02 15 5

H-12 Assess Existing Site Infrastructure 05-Nov-01 09-Nov-01 09-May-02 15-May-02 5 127

H-13 Develop Conceptual Site Layout 12-Nov-01 16-Nov-01 16-May-02 22-May-02 5 127

H-14 Hold Stakeholder Workshop 19-Nov-01 21-Nov-01 23-May-02 27-May-02 3 127

H-15 Identify Potential WTP Sites 22-Nov-01 05-Dec-01 28-May-02 10-Jun-02 10 127

H-16 Develop Preliminary Plant Layout 26-Nov-01 07-Dec-01 28-May-02 10-Jun-02 10 125

H-17 Select WTP Plant Site 26-Feb-02 11-Mar-02 11-Jun-02 24-Jun-02 10 75

H-18 Finalize Discharge Criteria 16-Jul-02 05-Aug-02 16-Jul-02 05-Aug-02 15 0

H-19 Establish WTP Design Criteria 16-Jul-02 05-Aug-02 16-Jul-02 05-Aug-02 15 0

H-20 Finalize PFD 06-Aug-02 19-Aug-02 06-Aug-02 19-Aug-02 10 0

H-21 Execute Site Investigations 06-Aug-02 16-Sep-02 06-Aug-02 16-Sep-02 30 0

H-22 Develop WTP Infrastructure Design 06-Aug-02 16-Sep-02 06-Aug-02 16-Sep-02 30 0

H-23 Develop WTP Feasibility Design 06-Aug-02 30-Sep-02 06-Aug-02 30-Sep-02 40 0

H-24 Estimate WTP Costs 10-Sep-02 14-Oct-02 10-Sep-02 14-Oct-02 25 0

H-25 Develop Draft WTP Report 01-Jul-02 18-Oct-02 01-Jul-02 18-Oct-02 80 0

H-26 Execute CEO Review 21-Oct-02 25-Oct-02 11-Nov-02 15-Nov-02 5 15

H-27 Review Draft WTP Report 21-Oct-02 06-Dec-02 21-Oct-02 06-Dec-02 35 0

H-28 Issue WTP Feasibility Report 09-Dec-02 27-Jan-03 09-Dec-02 27-Jan-03 30 0

J SLUDGE MANAGEMENT

J-01 Develop Sludge Concepts 05-Nov-01 09-Nov-01 16-May-02 22-May-02 5 132

J-02 Assess Sludge Quality and Quantity 09-Apr-02 22-Apr-02 16-Apr-02 29-Apr-02 10 5

J-03 Develop Sludge Options 23-Apr-02 29-Apr-02 30-Apr-02 06-May-02 5 5

J-04 Evaluate Sludge Options 30-Apr-02 17-Jun-02 07-May-02 24-Jun-02 35 5


SCHEDULE

U747A Page 3 - 05

Activity ID


Early Finish

Late Start

Late Finish

Orig. Duration

Total Float

K FAN HYDROGEOLOGY

K-01 Execute Historical Review 05-Nov-01 30-Nov-01 05-Nov-01 30-Nov-01 20 0

K-02 Develop Surface Work Plan 03-Dec-01 14-Dec-01 03-Dec-01 14-Dec-01 10 0

K-03 Install Fan Aquifer Test Wells 17-Dec-01 07-Jan-02 17-Dec-01 07-Jan-02 10 0

K-04 Conduct Fan Baseline Aquifer Study 08-Jan-02 14-Jan-02 22-Jan-02 28-Jan-02 5 10

K-05 Execute Fan Pump Tests 15-Jan-02 21-Jan-02 29-Jan-02 04-Feb-02 5 10

K-06 Develop Fan Groundwater Model 22-Jan-02 04-Mar-02 05-Feb-02 18-Mar-02 30 10

K-07 Monitor Fan Test Wells 08-Jan-02 03-Jun-02 08-Jan-02 03-Jun-02 105 0

K-08 Assess Impact of 4100L Plug Test 04-Jun-02 24-Jun-02 04-Jun-02 24-Jun-02 15 0

K-09 Execute AA PSI 17-Dec-01 21-Jan-02 15-Jul-02 09-Aug-02 20 144

K-10 Develop DSI Work Plan 22-Jan-02 04-Feb-02 12-Aug-02 23-Aug-02 10 144

K-11 Execute AA Water Tests 05-Feb-02 25-Feb-02 16-Sep-02 04-Oct-02 15 159

L CONTAMINATED SOILS

L-01 Sample Britannia Creek 17-Dec-01 21-Dec-01 12-Mar-02 18-Mar-02 5 55

L-02 Sample Fan Surficial Soils 17-Dec-01 21-Jan-02 22-Jan-02 18-Feb-02 20 20

L-03 Execute Fan Test Pit Program 22-Jan-02 18-Feb-02 19-Feb-02 18-Mar-02 20 20

L-04 Prepare Fan DSI Report 05-Mar-02 15-Apr-02 19-Mar-02 29-Apr-02 30 10

L-05 Sample AA Soils and Waste Rock 05-Feb-02 25-Feb-02 26-Aug-02 13-Sep-02 15 144

L-06 Execute AA Test Pit Program 26-Feb-02 18-Mar-02 16-Sep-02 04-Oct-02 15 144

L-07 Prepare AA DSI Report 19-Mar-02 29-Apr-02 07-Oct-02 15-Nov-02 30 144

M RISK ASSESSMENT

M-01 Execute Risk Screening Assessment 05-Nov-01 23-Nov-01 12-Nov-01 30-Nov-01 15 5

M-02 Execute Fan Ecological Risk Assessment

16-Apr-02 13-May-02 30-Apr-02 27-May-02 20 10

M-03 Execute Fan Human Health Risk Assessment

16-Apr-02 29-Apr-02 14-May-02 27-May-02 10 20

M-04 Develop Subtidal Sediment Risk Assessment

01-Jan-03 17-Jun-03 01-Jan-03 17-Jun-03 120 0

M-05 Execute AA Ecological Risk Assessment

30-Apr-02 27-May-02 18-Nov-02 13-Dec-02 20 144

M-06 Execute AA Human Health Risk Assessment

30-Apr-02 27-May-02 18-Nov-02 13-Dec-02 20 144

N REMEDIATION PLANS

N-01 Develop Fan Remediation Plan 14-May-02 10-Jun-02 28-May-02 24-Jun-02 20 10

N-02 Develop AA Remediation Plan 28-May-02 24-Jun-02 16-Dec-02 20-Jan-03 20 144


SCHEDULE

U747A Page 3 - 06

Activity ID


Early Finish

Late Start

Late Finish

Orig. Duration

Total Float

P SEDIMENTS

P-01 Execute Sediment Geophysical Surveys

05-Nov-01 14-Dec-01 19-Mar-02 29-Apr-02 30 90

P-02 Assess Sediments’ Effects 05-Nov-01 07-Jan-02 05-Nov-01 07-Jan-02 40 0

P-03 Execute Sediment Biological Surveys 05-Nov-01 29-Apr-02 05-Nov-01 29-Apr-02 120 0

P-04 Review Existing Subtidal Information 30-Apr-02 27-May-02 30-Apr-02 27-May-02 20 0

P-05 Identify Gaps in Subtidal Information 28-May-02 10-Jun-02 28-May-02 10-Jun-02 10 0

P-06 Develop Subtidal Work Plan 11-Jun-02 08-Jul-02 11-Jun-02 08-Jul-02 20 0

P-07 Execute Marine Sediments DSI 09-Jul-02 28-Oct-02 09-Jul-02 28-Oct-02 80 0

P-08 Develop Subtidal Sediments DSI Report

29-Oct-02 23-Dec-02 29-Oct-02 23-Dec-02 40 0

P-09 Develop Sediment Management Plan 18-Jun-03 09-Sep-03 18-Jun-03 09-Sep-03 60 0

Q COMPLIANCE

Q-01 Develop Permitting Strategy 05-Nov-01 16-Nov-01 05-Nov-01 16-Nov-01 10 0

Q-02 Develop Permitting Schedule 19-Nov-01 14-Dec-01 19-Nov-01 14-Dec-01 20 0

Q-03 Develop EPC Permitting Schedule 05-Nov-01 14-Dec-01 26-Aug-02 04-Oct-02 30 204

R SITE WIDE MONITORING

R-01 Develop Monitoring Program 05-Nov-01 16-Nov-01 05-Nov-01 16-Nov-01 10 0

R-02 Implement Monitoring Program 19-Nov-01 08-Jul-02 19-Nov-01 08-Jul-02 160 0

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

A. PROJECT ADMINISTRATIONA-01 5 05NOV01 09NOV01 0

A-02 10 05NOV01 16NOV01 0

A-03 10 05NOV01 16NOV01 0

A-04 15 05NOV01 23NOV01 0

A-05 15 05NOV01 23NOV01 0

A-06 30 05NOV01 14DEC01 0

A-07 20 05NOV01 30NOV01 115

A-08 60 05NOV01 04FEB02 115

A-09 60 05NOV01 04FEB02 115

A-10 60 05NOV01 04FEB02 115

A-11 60 18JUN02 09SEP02 89

B. MINE INSPECTION and REHABB-01 5 05NOV01 09NOV01 0

B-02 5 12NOV01 16NOV01 0

B-03 3 19NOV01 21NOV01 0

B-04 2 22NOV01 23NOV01 0

B-05 10 26NOV01 07DEC01 0

B-06 15 10DEC01 07JAN02 0

B-07 10 22NOV01 05DEC01 5

2001 2002 2003N D J F M A M J J A S O N D J F M A M J J A S O N D A

Mobilize Project Website

Establish Expenditure Guidelines

Develop Health and Safety Plans

Resolve Contracts

Develop Consultation Plan

Develop Standing Offer Eligibility List

Develop Economic Model

Develop Project Execution Strategy

Develop WTP Operating Strategy

Establish Operating Philosophy

Acquire Land Rights

Develop Mine Inspection Plan

Approve Mine Inspection Program

Execute Mine Inspection Program

Develop Phase 1 Rehabilitation Plan

Approve Phase 1 Rehabilitation Plan

Implement Phase 1 Mine Rehabilitation

Prepare Mine Rehabilitation Program

© Primavera Systems, Inc.

Start Date 05NOV01Finish Date 09SEP03Data Date 05NOV01Run Date 16NOV01 15:05

Early Bar

Float Bar

Progress Bar

Critical Activity

BMRP

BRITANNIA MINE REMEDIATION PROJECT

Government of BC -- MWLAP

FEASIBILITY MASTER SCHEDULE

Sheet 1 of 7

Sheet 2 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

B-08 20 06DEC01 10JAN02 5

B-09 20 11JAN02 07FEB02 5

B-10 30 08FEB02 21MAR02 196

B-11 15 22MAR02 11APR02 196

C. HYDROLOGYC-01 10 05NOV01 16NOV01 20

C-02 10 19NOV01 30NOV01 20

C-03 15 05NOV01 23NOV01 25

C-04 10 03DEC01 14DEC01 20

C-05 10 17DEC01 07JAN02 264

D. FLOOD RISKD-01 10 05NOV01 16NOV01 75

D-02 20 19NOV01 14DEC01 75

D-03 10 17DEC01 07JAN02 75

D-04 15 17DEC01 14JAN02 90

D-05 15 17DEC01 14JAN02 90

D-06 15 08JAN02 28JAN02 80

D-07 20 08JAN02 04FEB02 75

D-08 15 05FEB02 25FEB02 75

E. MINE WATER COLLECTIONE-01 5 05NOV01 09NOV01 30

E-02 5 12NOV01 16NOV01 30

E-03 10 19NOV01 30NOV01 30

E-04 20 05NOV01 30NOV01 25


Approve Mine Rehabilitation Program



Prepare Mine Rehabilitation Report

Review Hydrology Data

Upgrade Flow Monitors

Prepare Base Maps

Estimate Mine Inflows

Finalize Hydrology Report

Review Precipitation and Flow Data

Calibrate Hydrologic Model

Execute Site Surveys

Assess Debris Flow

Develop Sedimentation Analysis

Route Flood Flows

Execute Dam Breach Analysis

Execute Downstream Flood Assessment

Review Water Quality Data

Review 2200L & Jane Basin Flow Paths

Assess Possible Diversions

Review Structural Geology

Sheet 2 of 7

Sheet 3 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

E-05 20 05NOV01 30NOV01 25

E-06 5 03DEC01 07DEC01 25

E-07 15 17DEC01 14JAN02 20

F. MINE WATER STORAGEF-01 1 14DEC01* 14DEC01 0

F-02 5 05NOV01 09NOV01 20

F-03 10 12NOV01 23NOV01 20

F-04 5 26NOV01 30NOV01 20

F-05 25 08JAN02 11FEB02 0

F-06 5 26NOV01 30NOV01 45

F-07 25 08JAN02 11FEB02 15

F-08 15 12FEB02 04MAR02 0

F-09 70 05MAR02 10JUN02 0

F-10 10 25JUN02 08JUL02 134

F-11 15 04JUN02 24JUN02 0

F-12 10 25JUN02 08JUL02 134

F-13 15 25JUN02 15JUL02 0

G. WATER QUALITYG-01 10 05NOV01 16NOV01 5

G-02 10 05NOV01 16NOV01 33

G-03 5 19NOV01 23NOV01 33

G-04 40 13DEC01 14FEB02 20

G-05 20 05NOV01 30NOV01 48

G-06 20 08FEB02 07MAR02 5


Create Mine/Geology Model

Identify Mine Water Flow Paths

Estimate Mine Water Flows

Close 2200L Plug

Review Plug Construction Records

Develop 4100L Plug Test Plan

Approve 4100L Plug Safety Review

Execute 4100L Plug Safety Review

Develop 4100L Test Release Plan

Install 4100L Plug Instruments

Obtain 4100L Plug Test Approvals

Execute 4100L Plug Test

Finalize Hydrogeology Report

Assess 4100L Plug Test

Finalize 4100L Plug Test Report

Develop Water Management Plan

Establish Preliminary WTP Feed Quality

Assess Mine Contaminant Sources

Predict Mine Storage Effects

Assess Mine Routine Effects

Design & Procure Mine Water Quality Monitors

Install Mine Water Quality Monitors

Sheet 3 of 7

Sheet 4 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

G-07 75 12MAR02 24JUN02 3

G-08 15 25JUN02 15JUL02 0

H. WATER TREATMENT PLANTH-01 3 05NOV01 07NOV01 0

H-02 30 08NOV01 19DEC01 0

H-03 2 05NOV01 06NOV01 13

H-04 5 07NOV01 13NOV01 13

H-05 10 05NOV01 16NOV01 5

H-06 5 19NOV01 23NOV01 5

H-07 15 26NOV01 14DEC01 5

H-08 15 17DEC01 14JAN02 5

H-09 60 15JAN02 08APR02 5

H-10 5 09APR02 15APR02 50

H-11 15 18JUN02 08JUL02 5

H-12 5 05NOV01 09NOV01 127

H-13 5 12NOV01 16NOV01 127

H-14 3 19NOV01 21NOV01 127

H-15 10 22NOV01 05DEC01 127

H-16 10 26NOV01 07DEC01 125

H-17 10 26FEB02 11MAR02 75

H-18 15 16JUL02 05AUG02 0

H-19 15 16JUL02 05AUG02 0

H-20 10 06AUG02 19AUG02 0

H-21 30 06AUG02 16SEP02 0


Monitor Mine Storage Effects

Establish Feasibility WTP Water Feed Quality

Develop Interim Improvement Opinion

Assess Interim Improvement

Review Existing Permit Criteria

Establish Discharge Objectives

Establish Preliminary WTP Feed Rate

Execute Lab Sulphide Assessment

Develop Preliminary WTP Design

Develop Pilot Program

Execute Pilot Program

Assess Sulphide Market

Assess Preliminary PFS and Failure Mode

Assess Existing Site Infrastructure

Develop Conceptual Site Layout

Hold Stakeholder Workshop

Identify Potential WTP Sites

Develop Preliminary Plant Layout

Select WTP Plant Site

Finalize Discharge Criteria

Establish WTP Design Criteria

Finalize PFD

Execute Site Investigations

Sheet 4 of 7

Sheet 5 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

H-22 30 06AUG02 16SEP02 0

H-23 40 06AUG02 30SEP02 0

H-24 25 10SEP02 14OCT02 0

H-25 80 01JUL02 18OCT02 0

H-26 5 21OCT02 25OCT02 15

H-27 35 21OCT02 06DEC02 0

H-28 30 09DEC02 27JAN03 0

J. SLUDGE MANAGEMENTJ-01 5 05NOV01 09NOV01 132

J-02 10 09APR02 22APR02 5

J-03 5 23APR02 29APR02 5

J-04 35 30APR02 17JUN02 5

K. FAN HYDROGEOLOGYK-01 20 05NOV01 30NOV01 0

K-02 10 03DEC01 14DEC01 0

K-03 10 17DEC01 07JAN02 0

K-04 5 08JAN02 14JAN02 10

K-05 5 15JAN02 21JAN02 10

K-06 30 22JAN02 04MAR02 10

K-07 105 08JAN02 03JUN02 0

K-08 15 04JUN02 24JUN02 0

K-09 20 17DEC01 21JAN02 144

K-10 10 22JAN02 04FEB02 144

K-11 15 05FEB02 25FEB02 159


Develop WTP Infrastructure Design

Develop WTP Feasibility Design

Estimate WTP Costs

Develop Draft WTP Report

Execute CEO Review

Review Draft WTP Report

Issue WTP Feasibility Report

Develop Sludge Concepts

Assess Sludge Quality and Quantity

Develop Sludge Options

Evaluate Sludge Options

Execute Historical Review

Develop Surface Work Plan

Install Fan Aquifer Test Wells

Conduct Fan Baseline Aquifer Study

Execute Fan Pump Tests

Develop Fan Groundwater Model

Monitor Fan Test Wells

Assess Impact of 4100L Plug Test

Execute AA PSI

Develop DSI Work Plan

Execute AA Water Tests

Sheet 5 of 7

Sheet 6 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

L. CONTAMINATED SOILSL-01 5 17DEC01 21DEC01 55

L-02 20 17DEC01 21JAN02 20

L-03 20 22JAN02 18FEB02 20

L-04 30 05MAR02 15APR02 10

L-05 15 05FEB02 25FEB02 144

L-06 15 26FEB02 18MAR02 144

L-07 30 19MAR02 29APR02 144

M. RISK ASSESSMENTM-01 15 05NOV01 23NOV01 5

M-02 20 16APR02 13MAY02 10

M-03 10 16APR02 29APR02 20

M-04 120 01JAN03 17JUN03 0

M-05 20 30APR02 27MAY02 144

M-06 20 30APR02 27MAY02 144

N. REMEDIATION PLANSN-01 20 14MAY02 10JUN02 10

N-02 20 28MAY02 24JUN02 144

P. SEDIMENTSP-01 30 05NOV01 14DEC01 90

P-02 40 05NOV01 07JAN02 0

P-03 120 05NOV01 29APR02 0

P-04 20 30APR02 27MAY02 0

P-05 10 28MAY02 10JUN02 0

P-06 20 11JUN02 08JUL02 0


Sample Britannia Creek

Sample Fan Surficial Soils

Execute Fan Test Pit Program

Prepare Fan DSI Report

Sample AA Soils and Waste Rock

Execute AA Test Pit Program

Prepare AA DSI Report

Execute Risk Screening Assessment

Execute Fan Ecological Risk Assessment

Execute Fan Human Health Risk Assessment

Develop Subtidal Sediment Risk Assessment

Execute AA Ecological Risk Assessment

Execute AA Human Health Risk Assessment

Develop Fan Remediation Plan

Develop AA Remediation Plan

Execute Sediment Geophysical Surveys

Assess Sediments’ Effects

Execute Sediment Biological Surveys

Review Existing Subtidal Information

Identify Gaps in Subtidal Information

Develop Subtidal Work Plan

Sheet 6 of 7

Sheet 7 of 7

ActivityID

OrigDur

EarlyStart

EarlyFinish

TotalFloat

P-07 80 09JUL02 28OCT02 0

P-08 40 29OCT02 23DEC02 0

P-09 60 18JUN03 09SEP03 0

Q. COMPLIANCEQ-01 10 05NOV01 16NOV01 0

Q-02 20 19NOV01 14DEC01 0

Q-03 30 05NOV01 14DEC01 204

R. SITE WIDE MONITORINGR-01 10 05NOV01 16NOV01 0

R-02 160 19NOV01 08JUL02 0


Execute Marine Sediments DSI

Develop Subtidal Sediments DSI Report

Develop Sediment Management Plan

Develop Permitting Strategy

Develop Permitting Schedule

Develop EPC Permitting Schedule

Develop Monitoring Program

Implement Monitoring Program

Sheet 7 of 7

Documents

Action plan for a feasibility study of the Britannia Mine ... · The document describes the development of MWLAP’s plan for remediation of the Britannia Mine site, including a detailed