Decommissioning mine waste management areas : design parameters for utilizing wetlands/muskeg for the Farley Lake mine property, Keystone Gold, Black Hawk Mining Inc. in the vicinity of Lynn Lake, northern Manitoba

Report provides data and information pertaining to the development of the plan to decommission Farley Lake mine

B-zone pit : limnology 1993-1996 and the fate of arsenic and nickel : final report / for CAMECO Corporation

Report discusses the behavious of Ni and As in the B-zone pit

CAMECO Corporation

Within the decommissioning scenarios for the B-Zone waste rock pile, a passive treatment approach for seepages which might emerge from the recontoured and revegetated pile is being considered. The muskeg areas to be used are within the waste management area, located between the waste rock pile and the pit or lvison Bay. Design criteria for a scale-up of the process to relegate As and Ni to sediments in these areas are based on 3 years of laboratory and field work. In collaboration with CANMET biotechnology, the forms of As and Ni which would be retained in the wetland sediments were determined and found to be environmentally stable under prevailing condition. Both elements are primarily complexed as organic particulates which are formed in association with the decomposition of added organic materials. In this form, the As and Ni settle to the sediment where they are transformed into insoluble metal precipitates as favourable Eh and pH conditions are encountered in the deeper portions of the sediment. Estimates of removal rates based on the experiments are 0.046 to 0.25 g.m-*.day-’ for As and 0.05 to 0.36 gm*.day” for Ni. Loading from the waste rock pile seepages are estimated as 153-398 kg.yr-’ for As and Xl-1,397 kg.yr-’ for Ni for 1992 to 1994 based on 7 % of precipitation reporting as run-off. An open water muskeg in the vicinity has an area of 2.4 ha and therefore theoretically sufficient to accommodate the annual loadings from the pile. Design criteria for scaleup are presented

Appendix 6.

The February 1995 survey was carried out over essentially the same grid as was established in March 1992. This year, two lines were added at both the east and west ends, and the complete grid surveyed with receiver - transmitter coil separations of 10 m, 20 m and 40 m. In the March 1992 survey, only 10 and 20 m coil separations were used. The 1992 results are presented on Maps MS-1 to MS-3 and the 1995 results on Maps MS-4 to MS-8. Differences between two sets of results are on MS-9 and MS10. Although the 1995 survey recovered the same 10 anomalies initially identified in 1992, differences in both horizontal and vertical positioning, as well as changes in the levels of conductivity, imply that significant changes have occurred in the groundwater regime in the area of the Mine Site. Some of these changes appear to be directly related to the presence of the Backfill Raise Diversion Ditch which was constructed shortly after the 1992 survey

CAMECO Corporation

Report discusses the ability to use self-sustaining decommissioning in the B-zone waste rock pile and the reports on the work which was carried out in 1997

McIntyre tailings slurries in progress, February 23, 2004.

Report provides data from samples taken at three pit locations from July 17, 2003

Biological polishing phase IV : model verification and scale-up : final report

Report examines the development of a biological polishing model over the course of four years

Appendix 2

The geophysical surveys carried out in the South Bay Mine area since 1992 have established that ground based electromagnetic surveys are effective for both detecting and mapping the migration of plumes of Acid Mine Drainage (AMD) in the groundwater, and for evaluating the effectiveness of the remediation measures that were implemented. During 1995, the electromagnetic surveying was focused in four areas: (1) Mud Lake (2) West of the Tailings (3) South of the Tailings/ Townsite (4) Mine Site Numerous geophysical anomalies were identified, and anomalies with unexplained sources of conductivity were tested during an extensive programme of piezometer installation. This section presents the results of the geophysical surveys in the Mud Lake area and west of the tailings area, along with water quality data obtained from the piezometers that were installed to test geophysical anomalies. These areas are all “exploratory” in nature where the surveys are being conducted for the first time. The survey was carried out step by step, adding lines as was indicated due to anomalies. Those were then used to place piezometers, and confirm or refute the presence of seepage pathways and delineate their extent

Decommissioning of South Bay: phosphate rock/brush application in Boomerang Lake, EM34 background Mud Lake survey, seepage canyon definition: 1995 final report / Submitted to: Mr. David Porter Talisman Energy Inc.

A diversion ditch wasconstructed,directing the flow of Backfill Raise drainageareaaway from Confederation Lake and towards Boomerang Lake. The ground water table in the mine/mill site was lowered appreciably and small seepage flows remained. Further curtailment of seepage flow was achieved by additional ditching below the Portal Raise in order to divert fresh water draining from Antenna Hill away from waste rock on the mine site beach. The electromagneticsurvey wasrepeated to compare the conditions to those prior to the diversion Boojum Research Limited 1995 South Bay Report February 28, 1997 6 Talisman Energy Inc. of the seepage. These findings are presented in Section 7 of this report. In Section 8, the last section of the report, conclusions are drawn based on the findings and options for evaluation of remedial actions are identified

Nickel and arsenic adsorption onto mucilage producing algal colonies : final report : CANMET, CAMECO - March 1997

Report describes the potential for Dictyosphaerium pulchellum to be used to adsorb nickel and arsenic in mining effluents