POLARIS MINE An Overview of the Decommissioning and

POLARIS MINE An Overview of the Decommissioning and Reclamation Plan Nunavut Water Board

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INTRODUCTION rh 4 mzb sivst 5 • Located on Little • m. Doeug 6, 100 r. Mub • • • Cornwallis Island, 100 km NW of Resolute Bay World’s most northern metal mine Starting producing Zinc/Lead concentrate in 1981 Finished mining in September, 2002 Approx. 21 million tonnes of ore was processed • • • rtzb sxozzi cshw 5 g 2 y. M 6 Jxu d 5 t 4 i 6 X 6 srs 6 b 6 gu n=4 k 5 s/C 4 ys 6=4 WQx 6 ym. J 6 n=4 nos 3 i 6 xegu ty. Jul n=C/4 n 3 u 4 1981_u W/Eg 6 s/C 4 ys 3 i 6 yt. WE, 2002_u u 4 ni 21 uox 8 b 8 yi 4 n=4 nos 6=sym. J 6

Environment x? to. Ei 6 • High arctic climate • Gently-rolling landscape • • • with low hills Tundra vegetation is sparse, gravel cover predominates Few musk oxen or caribou Polar bears are commonly sighted • d 5 y 4 g 2 srs 3 b 6 g 2 • • y. Mz mi. Csi 6 n 6 k. Nz Sr 5 gi 4 xr=zc 6 g 6 Nt 6 Nu WD 6 g 5 xf 5 g. J 5, gx. X/ai 3 n 6 su 1 mrg 6 g 4 grglil Nky. ZJN 3 g 6

Regulatory Background xs. M 5 tpk 5 si 2 vsyq • Nunavut Water Board • Water Licence N 4 L 2 -0262 issued by NWT Water Board – First licence: Nov 81 Dec 91 – Second Licence: Jan 92 -Dec 93 – Third Licence: Jan 94 Dec 02 – Final Licence: pending approval following March Hearing • k. NK 5 wmo. Ep 5 vtmp 5 • wm 6 j 5 Mwnz N 4 L 2 -0262 gi/sym. J 6 k. N 5 yx 6 wmo. Ep 5 vtmp 5 – y. Ko 6 Mwnz: k=WE 81 -ty. WE 91 – g 4 o 6 Mwnz: /kx. E 92 ty. WE 93 – WZJx 5 Mwnz : /kx. E 94 - ty. WE 02 – rao 6 X 6 Mwnz : Nl. Nw. Dm 6 xq 6 bsiz raix. A 5 mpu x. W 6 hwi 6

Regulatory Background xs. M 5 tpk 5 si 2 vsyq • Department of Indian • Affairs and Northern Development Land Leases – 5 surface leases – 3 mining leases • wko. Epgcf 5 v. Nbu • k. Nj 5 xg 6 gx. Dt 5 – 5 k. N 2 czi xg 6 gx. Dt 5 – 3 s/C 4 ys 3 i 6 j 5 xg 6 gx. Dt 5

Regulatory Background xs. M 5 tpk 5 si 2 vsyq • Department of Fisheries and Oceans – Garrow Lake – Dock/Foreshore Area • wclo. Ep 5 b. Es 6 usbo. Ep 5 – Z 3 D by 6 – g. M 4 b 6=4 Fb. Es 2 y. Nzi

Regulatory Chronology xs. M 5 tpi 5 xg. Zsymiq • March 2001 - Cominco Ltd. • mp 2001 - vu 1 f Nuic 6 g 5 • • submits Polaris Closure and Reclamation Plan September 2001 - Technical Meeting held in Resolute Bay October 2001 Submissions received on C&R Plan by interested parties April 2002 – NWB and DIAND jointly approve the C&R Plan with certain exceptions, exceptions include: – Garrow Lake – Dock area and shoreline – Frustration Lake • • giy. J 5 SM 3 E{ mg/sizk 5 x 7 ml wodyzk 5 st 6 t 5 izk 5 X 6 NAti 4 yt. WE 2001 – Wlx 6 N 6 go. Ei 6 j 5 vtm. J 5 cshw 5 gu x 4 g. WE 2001 gi/s. J 5 W/sym. J 5 no 4 bsizk 5 x 7 ml wodyzk 5 st 6 t. Ei 6 j 5 X 6 NAtk 5 gnsmcbs. Ji 5 Wcbs. Ji 5 xw. WE 2002 – wmo. Ep 5 x 7 ml wko. Epgcf 5 vgpct. Q 4 Lt 4 xq 6 bq b 2 fx 5 no 4 bsizk 5 x 7 ml wodyzk 5 st 6 t. Ei 6 j 5 X 6 NAt 5 w. Mq Wcbsq 5 vlx 6 t 5 l. Q 5, w. Mc 6 g 5 bmfiz: – Z 3 D by 6 – g. M 4 b 6=4 x 7 ml y 4/3 Xyz – wu 6 b 6=4 by 6

Regulatory Chronology xs. M 5 tpi 5 xg. Zsymiq • September 2002 – DFO • yt. WE 2002 – wclo. Ep 5 • • • approves C&R Plan for Garrow Lake and Dock and Shoreline areas October 2002 – Cominco Ltd. applies for water licence to cover C&R activies November 2002 – NPC approves C&R Plan December 2002 – NIRB approves plan January 2003 – NWB prehearing held in Resolute Bay • • • b. Es 6 usbo. Ep 5 xq 6 bq no 4 bsizk 5 x 7 ml wodyzk 5 st 6 t. Ei 6 j 5 X 6 NAt 5 Z 3 D by 6 j 5 x 7 ml g. M 4 b 6=4 y. Nzk 5 cizk 5 x 4 g. WE 2002 – vu 1 f Nuic 6 g 5 g 4 y. C 6 g 5 wm 6 j 5 Mwn 4 nu 4 Wo. E 5 Jt 4 nk 5 no 4 bsizk 5 x 7 ml wodyzk 5 st 6 t. Ei 6 j 5 Wo. Exk 5 k=WE 2002 – X 3 Nwp 5 xq 6 bz 5 no 4 bsizk 5 x 7 ml wodyzk 5 st 6 t. Ei 6 j 5 X 6 NAt 5 ty. WE 2002 – x? to. Ep 5 xq 6 bq X 6 NAt 5 /kx. E 2003 – wmo. Ep 5 y. Kxi x. W 6 hwixn 5 t 5 l. Q 5 vtmt 5 t. J 5 cshw 5 gu

The Closure Plan b 7 N mg/sizk 5 X 6 NAt 5

Plan Objectives X 6 NAbs. Jk 5 W/s. Nhx 3 g 5 • To ensure that public • WNh 4 iq bmfx 5 wkw 5 • • health/safety and environment are protected To eliminate or minimize need for long term maintenance To restore site to aesthetically acceptable condition To address concerns of stakeholders during implementation • • xix 6 bwomif dx 6 n 6 Ngf 6 bwomiq x 7 ml x? t 5 n. St/symiq x. JNq. X 5 xrisq. M 6 ckwgi=izk sttbs. Nh 4 li st 6 tbs 5 iz n. N=s. J 6 bfu. N 6 yl. A ckwoz 5 iz Wo. ENh 4 iq whml. Abs. J 5 w. Ms=scbs. Ji 5 xg. Zs? oxt 5 l. Q 5 xg. Z 4 nox 5

Reclamation Components wodyzk 5 st 6 t. Ei 6 j 5 wloq

Reclamation Components wodyzk 5 st 6 t. Ei 6 j 5 wloq Mine Workings s/C 4 ys 6=4 u Wo. E 5 Jt 5

Underground Workings k. N 2 wlxi Wo. E 5 Jt 5 • Equipment to be reused, • n. N 5 Jt 5 xgvi. Zs. J 4 n 5, • • • sold or left in mine Hazardous material removed from underground Portals, raises, shafts and entrances to be sealed Underground fuel tank to be drained and stored. • • • is=Dbs. J 4 n 5 s? li 5 em 4 bs. J 4 n 5 s/C 4 ys 6=4 u h. D 6 Nic 6 g 5 Wdt 5 xj/s. J 4 n 5 k. N 2 wlxi 5 x 1 msmiq k. Nj 5, S 6 gy. Qx 6 ymiq, k. Nj 5 wlxk 4 Sgymiq x 7 ml wy 6 b 6=q mg/s/Exc 6 g 5 k. N 2 wlxi s 6 hc 6=5 c 5 bs/6 Dx 5 wmw/Zslt 4 x 7 ml g 5 d 6 bsix 5.

Subsidence Ni 6 o. J 6 • Some subsidence has • Ni 6 oymic 6 g 6 • • occurred Backfill programs have reduced subsidence rates SR is predicted to diminish Regular monitoring is conducted • • w. Mzk 5 r=x 6 g. Zsiqk 5 Wo. E 5 Jt 5 Ni 6 oymiqk 5 Wlx 6 bwobs. J 5 Ni 6 o 6 b 6 iz u 4 y? oxix. Ch. Q/s. J 6 Nstsm/siz Wo. E/siz v. Jyq. N 6 ix 6

Mine Portals s/C 4 b 6=s 2 wy 6 b 6=q • Four portals • Access to be • maintained until materials are stored underground Portals to be sealed by concrete barriers and then backfilled and contoured • ybm 5 wy 6 b 6=5 • wy 6 b 6=q hiq 5 l. Q 5 • Wdt 5 gd 6 bsc 6 t 5 l. Q 5 k. N 2 wlxi wy 6 b 6=5 mg/six 5 ee 5 b 6 gk 5 g 4 l. Zslt 4 x 7 ml r=x 6 bslt 4 x 7 ml y=zic 6 t 5 l. Q 5

Waste Rock x 4 bf 5 s/c 5 • Limestone and shale • • waste rock has been stockpiled around the 1972 and North portals The waste rock is not acid -generating Most waste rock has been used for backfill or construction purposes • ys. Cox 5 x 7 ml ng. Z/5 • • s/c 5 vtt. Zsym. J 5 cizi 1972 x 7 ml rtzi 5 i 6 ni x 1 msmi 6 i bmfx 5 x 4 bf 5 s/c 5 h. D 6 N 6 icq 5 g 5 xqi 6 n 6 x 4 bf 5 s/c 5 xg. Zsym. J 5 r}=x 6 g. Dbs 2 lt 4 s? li 5 n. N/s. Jk 5 xg. Zsym. J 5

Surface Stockpiles k. N 2 czi vtt 6 ym. J 5 • Ore was stockpiled on • n=4 nw 5 vtt. Zsym. J 5 czi • • waste rock dump near the ’ 72 portal Sulphide ore was found near the stockpiles The ore will be processed or placed underground Lead ore contamination around North Portal to be excavated and disposed underground • • x 4 bf 5 s/c 5 x 4 b 6=zi cizi ’ 72 wy 6 b 6=zi n 9? w 5 n=4 n 6 Ni/sym. J 6 cizi b 2 fx 5 vtbsymiq 5 i b 2 fx 5 n=4 n 5 n. N/six 5 s? li 5 wo/slt 4 k. N 2 wlxk 5 ox 4 n=4 n 6 u 4 h. D 6 N 6 ic 6 g 5 cizi rtzb wy 6 b 6=zi xy? 6 bsix 5 x 7 ml k. N 2 wlxk 4 bslt 4

Surface Quarries k. N 2 czi s/C 4 b 6=5 • Little Red Dog (LRD): limestone quarry – No risk for acid rock drainage – To be used as disposal location for buildings, concrete foundations, pipelines, cables, et cetera – No hazardous materials to be disposed – Engineered cover to be employed, contoured to prevent ponding of surface water • k. N 2 czi s/C 4 b 6==i 6 (xs. X 3 g 6 eufl 4): cf 6 gi 4 s/Cb 3=4 – dx 6 n 3 Nq 5 g 5 h. D 6 N 6 io 4 i 4 s/c 5 f 4=siqk 5 – xg 6 bsix 6 x 4 b 6=sizk 5 w[l 6 Jxk 5, dx 6 tym. J 5 gz=qk 5, h 2 lk 5, x 9 D/k 5, xyqk 5 l – h. D 6 N 6 io 4 i 4 Wdti 4 x 4 b 6=sixq 5 g 6 – cspmps. Ji 5 co 6 g. Dt 4 noxi 4 ns/six 6, y=zic 6 t 5 l. A by. Co 6 b. Mzq 5 gu 4 k. N 2 czi wm 6 u 5

Surface Quarries k. N 2 czi s/C 4 b 6=5 • Two shale quarries – Walls and floors to be graded to ensure long term stability and to limit ponding of water – No risk of acid rock drainage • m 9 D 4 yx. CM 6 g 5 s/Cc 6=4 – xr. Nq x 7 ml Ntq mi 4 Zslt 4 y=g. Jj 5 hix. Mw/6 l. Q 5 x 7 ml by. Co 6 b 6 lx. Mw/6 l. Q 5 wm 6 u 4 – dx 6 n 3 Nq 5 g 5 h. D 6 N 6 io 4 i 4 s/c 5 f 4=siqk 5

Metal Leaching/Acid Rock Drainage (ML/ARD) n=Z 6 i 4 meiz. Fh. D 6 N 6 i 3 u 4 f=siz • Various sites was • w. Mq n. N=s. J 5 Nl. Nw 6 g. Zsym. J 5 • • assessed for ML/ARD potential The absence of underground water and an ore body encased in permafrost will prevent underground workings from ML/ARD Portals and raisebore holes to be sealed Lack of oxygen at the bottom of Garrow Lake will prevent ML/ARD • • n=Z 6 i 4 meiz. Fh. D 6 N 6 i 3 u 4 f=siz Wbc. C/6 iqk 5 Wbcq 5 iz k. N 2 wlxi wm 6 u 4 x 7 ml n=4 n 6 bc 6 iz so 4 bsymiz eeymizk 5 W 5 bwobsix 6 k. N 2 wlxi n. N=s. Jk 5 bmfkz n=Z 6 i 4 meiz. Fh. D 6 N 6 i 3 u 4 f=siz k. Nj 5 wy 6 b 6=q x 7 ml d 5 t 4 yymiqk 5 x 1 msmiq mg/six 5 Wbc 5 txq 5 iz xi 6 n. Abs. J 1 N 6 gu 4 Ntzi Z 3 D by 6 u W 5 bwo 5 Jbsix 6 n=Z 6 i 4 meiz. Fh. D 6 N 6 i 3 u 4 f=siz

Reclamation Compoments wodyzk 5 st 6 t. Ei 6 j 5 w. Mq Garrow Lake Tailing Impoundment Z 3 D by 6 s/C 4 b 6 ifk 5 x 4 b 6=4 yxm 4 bwo=s. J 6

Garrow Lake – Disposal History Z 3 D by 6 _ x 4 b 6=sizk 5 si 2 vsyq • • Garrow Lake is stratified • Tailings deposited at least • • 26 m below surface Pipeline breaks in 1985 and 1989 increased zinc concentration Containment dam built at outflow due to pipeline breaks Lake water was discharged after 1994 • • • Z 3 D by 6 wmz co. E 4 b 6 ic 6 g 6 S/C 4 b 6 if 5 x 4 bf 5 f=5 b. Zs? 4 g 5 cizk 5 @^ ub wtizk 5 h 5 lxl 4 yduym. J 6 1985 u x 7 ml 1989 u Wbcovi. Dbs 2 li p 14 vt 6 h 6 izi 4 yxm 4 bwo 5 n. Sbs. J 6 n. N/sym. J 6 f=5 b 6=zi W 5 Jbs 2 li h 5 lxl 4 ydu 5 b 6 iz bys 2 wmz f=/sym. J 6 rax. A 5 1994

Garrow Lake – Closure Approach Z 3 D by 6 _ mg/sizk 5 g. Cz. J 6 • Lines flushed after mine • • equipment dismantled and cleaned Lines to be floated to surface and cut into sections Tailings lines, Garrow Lake pipes and siphons to be disposed in the LRD quarry • h 5 lxlw 5 sx 6 bslt 4 • • s/C 4 ys 6=4 u n. N 5 Jt 5 w. A 5 t. Zsc 6 t 5 l. Q 5 x 7 ml no 4 bsli h 5 lxlw 5 S 4 bybslt 4 czk 5 x 7 ml r 9 l 6 bslt 4 Nw[o. Qx 6 bslt 4 s/C 4 b 6 ifk 5 x 4 bfk 5 x 2 dbs. J 5, Z 3 D by 6 u h 5 lxlw 5 x 7 ml X 4 XAbw x 4 b. Zslt 4 b[Kz wlgixl 4 j 5 s/C 4 b 6==i 6 j 5

Garrow Lake – Stability and Chemistry Z 3 D by 6 _ hixbwoizk 5 x 7 ml x. KQ 4 tb 6 izk 5 • Studies revealed: – Vertical layers are maintained – Zinc concentration in surface layer have decreased – Concentrations are predicted to decrease over time • Modeling indicates that lake-level can be reduced without affecting layers • cspn 6 bs. J 5 ne 6 tbs. J 5: – x 8 j 4 Xoxymiq d 9 o. E 4 tymiq hixbwol. Q 5 – p 14 vt 6 hymiq d 9 o 6 Xu wms 2 x=4 ymizi Wbc 6 lx. Dw 6 g 6 – vt 6 hymiq i. Es. Q/s. J 5 uy? oxq. N 6 ix 6 t 5 l. Q 5 x. CA 5 xuh 5 cq 6 Xoxiqi • s 4 g. Dtaxox 5 Nl. Nw 2 fbs. J 5 b 2 fx 5 by 6 u wms. Z 6 iz wm 4 y? o. Zs. J 1 N 6 g 6 hixqt 5 l. Q 5 d 9 o. E 4 tymiq

Garrow Lake – Discharge Z 3 D by 6 _ f=tbsiz • Lake level is approx. • • 2. 5 m higher that predam level Need to discharge 10 M m 3 Metals of concern zinc, copper, lead • bys 2 wms. Z 6 iz 2. 5 • • ubu 4 wm. Z 6 i 6 ns. J 6 y. Kxi n. Sy 6 bsixn 6 t 5 l. A W/Exo 4 f=tbsli 10 ubu 4 r 4 L 6 Ns/t 5 l. A N=Zw 5 whml. Q/s. J 5 p 14, v. S 3, ox 5

Garrow Lake Discharge Z 3 D by 6 _ f=tbsiz • To maintain water quality, Consultants have recommended that: – Discharge does not occur prior to melting sea ice (avoid sensitive period for young aquatic organisms) – Cease discharge in fall when sea ice begins to form solid cover. (avoids breeding period for aquatic fauna) – Monitor discharge from GL and receiving environment Garrow Bay • xe 4 ym. Nh 4 LA wms 2 ck. E 5 iz, cspmps. J 5 WNhxdp. J 5 bmfiz: – f=t 5 tc 5 bq 5 lt 4 ryxi 4 b. Es 6 xs 4 Xoxo 6 t 5 l. A (W 5 bwoml. Q 5 WD 6 n? oxon 6 t 5 l. Q 5 b. Es 6 usbl 4 b 5 sm. JClw 5) – si 4 tc 5 b 6 l. A f=tbsiz srx 4 nu b. Es 6 eem. Eo 6 t 5 l. A. (W 5 bwoml. A w 3 is 6 Xoxt 5 l. Q 5 b. Es 6 u sm. J 5) – Nstsml. A f=tbsiz Z 3 D by 6 u 5 x 7 ml f==s. J 2 x? tz Z 3 D vq 6 L 4

Garrow Lake – Frozen Dam Core Z 3 D by 6 _ edm. J 6 n. Sbs. J 2 etz • Built in 1990/1991 to • allow better control over water discharge Core made of crushed slate and ice • n. N/sym. J 6 • 1990/1991 -u WJ 1 Nd 2 l. A xe 4 ymi 6 nu 4 wm 6 u 4 f=t 5 t. J 1 N 6 iz etz n. Nym. J 6 ydm. E 4 yym. Ju 4 s/Coxu 4 x 7 ml yfu 4

Garrow Lake – Decommissioning Z 3 D by 6 _ w. A 5 t. Zs? oxiz • Centre portion of dam • etzi 5 g 6 n. St 2 • • • to be removed Styrofoam insulation sent to LRD Creek bed to be armored to minimize erosion Slopes blend to reflect surrounding terrain • • • xy? 6 bsix 6 edmizk 5 g 4 l. Q/s. J 6 x[/Zsix 6 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 f. Zs/2 y. Nz ci. Zsix 6 ydulx 6 bwot 4 nzi 4 y=ziq xpo. Qx 6 bsix 5 x? tzk 5 micj 5

Reclamation Compoments wodyzk 5 st 6 t. Ei 6 j 5 w. Mq Major Surface Structures xqi 6 X 5 k. N 2 czi n. Nym. J 5

Process Barge n=4 nos 6=4 sux 6 Jx 2 vlbz • Contains a process • plant, power generators, office, shops Decommissioning: – Buried in LRD as refloating it would cause significant damage – Contaminated rockfill to be disposed of underground • Wbc 6 g 6 n=4 nos 6=4 i 4, • wfmdtk 5 doos. Dti 4, x 9 M 4=4 i 4, n. N=4 i 4 w. A 5 t. Zsiz: – ns/sli wlgi 6 Jxj 5 s/C 4 b 6==i 6 j 5 S 4 btbsiz xq. Ju 4 dx 6 n 6 NC/6 m 5 – hdwym. J 5 s/c 5 r=xdbs. J 5 x 4 b. Zs/Exc 6 g 5 k. N 2 wlxk 5

Concentrate Storage Building n=4 nk 5 g 5 d 6 ym=4 w[l 6 Jx 6 • All concentrate and • • equipment removed Steel cladding cleaned, disposal to LRD Quarry Contaminated soils to be disposed underground Concrete footing to LRD Area backfilled and graded to stable slope • bmwb n=4 n 5 x 7 ml • • Wo. E 5 Jt 5 xy? 6 bsix 5 n=5 co 6 g. Dtq no 4 bslt 4, x 4 b. Zslt 4 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 hdwym. J 5 k. N 5 x 4 b. Zsix 5 k. N 2 wlxk 5 eetym. J 5 s/es. Z 5 gz=q wlgixl 4 j 5 s/C 4 b 6==i 6 j. Zsix 5 wiz r=xbsli x 7 ml hix. Mw/6 l. A y=zio 6 bsli

Cemented Rockfill Plant eetym. J 6 s/es. Z 6 s/cu 4 r=x. Dt 4 nos 6=4 Wo. E=4 • Equipment to be reused • • or disposed of at LRD Cement contaminated soil to be disposed of in LRD Fuel tanks to be cleaned, crushed, and sent to LRD Foundation broken and covered with overburden • • • Wo. E 5 Jt 5 xg. Zsvi 6 ix 5 s? li 5 x 4 b. Zslt 4 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 eetym. Ju 4 s/es. Z 6 u 4 hdwym. J 5 k. N 5 x 4 b. Zsix 5 b[Kz wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 s 6 hc 6=5 c 5 bs/6 Jx 5 no 4 bsix 5, Ni 4 tbslt 4, x 7 ml wo/slt 4 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 gz=z yd 2 g. Zsli x 7 ml ns/sli k. Nu 4

Accomodation Complex g. J 6 u=4 w[l 6 Jx 6 • Fuel tanks to be cleaned • • and sent to LRD Hazardous Material to be stored and shipped offsite Building to be stripped of useful/saleable items Remaining equipment to be disposed of in LRD Foundation broken, area graded • s 6 hc 6=5 c 5 bs/6 Jx 5 • • no 4 bslt 4 x 7 ml wo/six 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 hdc 6 g 5 Wdt 5 g 5 d. Zsix 5 x 7 ml xs. M 6 tbslt 4 xyk 5 w[l 6 Jx 6 Wbc. Dw 6 bsix 6 xg. D 1 N 6 gi 4 Fis=Dbs. J 1 N 6 g i 4 Wdti 4 xyq Wdt 5 x 4 b. Zsix 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 z=z yd 2 g. Zsli, ciz mi 4 n. Zsix 6

Tailings Thickener s/C 4 b 6 if 5 x 4 bfk 5 ri 6 tt. D 5 • Tailings in emergency • s/C 4 b 6 if 5 x 4 bf 5 • • basin to be sent to Garrow Lake or sealed in underground workings Building dismantled; tanks and pipelines flushed Material to be sent to LRD Base graded to stable slope • • sov. M 4 i 6 X 5 f==zi wo/six 5 Z 3 D by 6 j 5 s? li 5 mg/slt 4 k. N 2 wlxk 5 n. N=s. Jj 5 w[l 6 Jx 6 w. A 5 t. Zsli; c 5 bs/6 Jx 5 x 7 ml h 2 lxlw 5 sx 6 t. Zsix 5 Wdt 5 wosc. Zsix 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 Ntz mi 4 n. Zsix 6 hix. Mw/6 l. A y=ziz

Fuel Storage and Handling Areas/Distribution Lines s 6 hk 5 gd 6 ym=5 x 7 ml Wo. E=s. J 5 Fx 2 dbs. J 5 h 5 lq • At closure all diesel fuel to • mg/s. Qx 6 X 5 bmwb • • • be transferred to one main tank, for removal Sludge removed and burned Tanks and pipelines to be cleaned and sent to LRD Quarry Impermeable liner and contaminated soils disposal underground Tank and pipeline areas to be graded • • • s 6 h 6 Jx 5 xbsy 6 j 5 c 5 bs/6 Jx 6 j. Zsix 5, xy? 6 bs. J 4 n 6 ytiq xy? 6 bslt 4 x 7 ml wfx. M/six 5 c 5 bs/5 x 7 ml h 5 lq no 4 bslt 4 wo/six 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 me. Mq 5 gu 4 me 5 bwot 5 x 7 ml hdwym. J 5 k. N 5 x 4 b. Zsix 5 k. N 2 wlxk 5 c 5 bs/c 6=5 x 7 ml h 5 lc 6=5 mi 4 n. Zsix 5

Bulk Chemical Storage Area xq. J 5 x. KQ/s. J 5 gd 6 ym=q • Inventoried, repackaged, shipped off-site for resale, disposal or return to supplier • Nn. Zslt 4, Sg. Zsvi 6 lt 4, xs. M 6 tbsix 5 n. N=s. Ju 5 is=x 4 nslt 4, x 4 b. Zslt 4 s? li 5 st 6 tbslt 4 Wb 6=s. Jj 5

Concentrate Load-out Conveyors n=4 nk 5 syo 6 g. Dt 5 b 2 y 6 Jx 5 • Conveyors cleaned, • b 2 y 6 Jx 5 no 4 bslt 4, • • • removed and dismantled Steel/equipment not to be reused will be dispose in LRD Contaminated soils around conveyors to be clean-up • xy? 6 bslt 4 x 7 ml w. A 5 t. Zsix 5 N=5 FWo. E 5 Jt 5 xgvi 6 ixq 5 g 5 x 4 b. Zsix 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 hd 6 ym. J 5 k. N 5 x? tzi b 2 y 6 Jx 5 no 4 bsix 5

Reclamation Compoments wodyzk 5 st 6 t. Ei 6 j 5 w. Mq Support Infrastructure w. Lxdbs. J 5 n. N/sym. J 5

Dock Site and Shoreline g. M 4 b 6=c 6=4 x 7 ml y 4/z • Sheet piles to be cut • n=5 co 4 tym. J 5 • • underneath water level Natural beach slope to be re-instated Dock to be one of the last structures addressed Temporary dock to have steel pilings cut off at ground level • • r 9 l. Zsix 5 xbk 5 wmc 6 is. Jj 5 wody. Clxz y. Nzb y=ziz st 6 tbsix 6 g. M 4 b 6=s. J 6 rao 6 Xacbsix 6 Wo. E/s. J 4 nk 5 xg. Zsvc 6 bs. J 6 g. M 4 b 6=4 n=5 gz=q r 9 l. Zsix 5 micj 5 Nocostl. Q 5

Airstrip u 5 b 6=4 • Airstrip is to be largely • u 5 b 6=4 • • left intact Lights, beacon and other equipment to be removed Airstrip to be formally closed with notification to authorities • • hism/sixq 5 g 6 d 9 oq, vw=5 b 6 g 6 do 6 x 7 ml xyq Wdt 5 xy? 6 bsix 5 u 5 b 6=4 mg/sm. E 4 ix 6 gn 6 ybslt 4 WJ 1 Nsyo. Epq

Tailings Lines s/C 4 b 6 if 5 x 4 bf 5 h 9 lxlq • Tailings and recycle • • water lines to be flushed and disposed of in LRD Discharge lines floated, cleaned and sent to LRD Pipeline right-of-way returned to restore natural drainage and prevent ponding. • s/C 4 b 6 if 5 x 4 bf 5 x 7 ml • • stvi 6=q wms 2 h 9 lxlq sx 6 bslt 4 x 7 ml x 4 b. Zsix 5 b[Kz wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 f=5 b 6=qk 5 h 9 lxlw 5 S 4 bybslt 4, no 4 bslt 4 x 7 ml wo/six 5 wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 h 9 lxlc 6=s. J 5 wiq st 6 tbslt 4 f 4=gcq x 7 ml by. Ci 4 b. Mw/6 l. Q 5

Freshwater Lines and Pumphouse wub 6=4 u 5 h 9 lq x 7 ml X 4 Xstc 6=z • Consists of a 5 km, 200 mm • • diameter insulated heat traced fiberglass pipe, with 200, 000 L heated storage tank. Pumphouse, storage tank and pipes to be dismantled and deposited in LRD Jetty extending into lake will be left in place. Pipeline route will be contoured and graded as needed • • • Wbc 6 g 6 5 r. Mubu 4, 200 uoubu 4 nij 4 t. QJu 4 eebwoto 4 u 4 s. N 6 i 6 j 5 cspnsto 4 u 4 w. Mw. At 6 Xl 4 gu 4 h 9 lu 4, Wbc 6 gu 4 200, 000 ob s. Ndto 4 u 4 wmcstc 6=4 u 4 z. X 4 Xstc 6=4, wmcstc 6=4 c 5 bs/6 Jx 6 x 7 ml h 9 lq w. A 5 t. Zsix 5 x 7 ml x 4 b. Zsix 6 b[Kz wlgixl 4 j 5 s/C 4 b 6==i 6 j 5 tr 6 es 6 ym. J 6 by 6 j 5 hi. Zsixq 5 g 6 h 9 lxl 2 wi. Zlxz y=zio 6 bsli mi 4 n. Zsli W/c 6 iz

Access Roads and Ramps x 2 dtq x 7 ml m. J 6 b 6=q • ~40 km roads on site • No stream crossings, • ~40 r. Mub x 2 dt 5 n. N=4 u • f. Zs/i 4 wv. Dtcq 5 g 6, • • • except a small culvert crossing over a stream exiting loon lake Culverts to be removed to reestablish natural drainage Re-contouring will be implemented as needed to ensure long term stability • ryxi 4 wm 6 k 5 f 4=os 6 ym. J 5 h 9 lw 5 wv. Z 4 n 6 f. Zs/u l 8 by 6 uz 6 gu 5 wm 6 k 5 f 4=os 6 ym. J 5 h 9 lw 5 xy? Exc 6 g 5 wody. Clxzk 5 wos 6 l. Q 5 f 4 b 6 iq y=zio 6 g. Zsix 6 xg. Exc 6 gk 5 WNhx 6 l. Q 5 y=g. Jj 5 hix. Mw/6 l. Q 5

Reclamation Compoments wodyzk 5 st 6 t. Ei 6 j 5 w. Mq Solid Waste Management Options yt. Jk 5 x 4 bfk 5 xs. M 5 t 5 Jbs. J 1 N 6 g 5

Construction Landfill n. N/s. Jk 5 x 4 b 6=4 • Was utilized between • xg. Zsym. J 6 xfizi • • • 1979 -1981 No inventory was taken during use Landfill is close to ocean and threatened by erosion Material is being relocated to the toe of the operational landfill An inventory of relocated waste is being kept • • • 1979 -1981 x 4 b. Zs. J 5 tt. C 6 bs? oxymq 5 g 5 xg. Zsizi x 4 b 6=4 cizi 5 g 6 b. Es 2 x 7 ml ydu 5 Xox. N/6 g 6 Wdt 5 k 4 t. Zs. J 5 b[Kz cizk 5 xg. Zs. Jj 5 x 4 b 6=4 j 5 tt. C 6 bs? ox. J 5 k 4 t. Zs. J 5 x 4 bf 5 Wym/sj 5

Operational Landfill xgbs. J 6 m 3 lf 3=4 • Operational since 1981 • Includes construction • xgb 3 bs. J 6 !(*!ui 5 · w. Qbscystcb 3 g 5 xuxfq • · • • materials, chemical bags, drums, scrap wood and municipal solid waste Municipal waste burned in reinforced concrete pit Layered landfill (west to east) and remains frozen all year Engineered cover design will be employed at closure with: – Shale layer with minimum thickness of 1. 8 m · · n. NJw 5, Sq 5 wm 3 lfw 5, cbs/w 5, e. J=i 5 xml k. Nous 5 m 3 lfq 5 wrbscbg 5 dx 3 tym. J 3 u wl 3 nu do. Eotym. J 6 wlnoxaym. J 6 m 3 lf 3=4 x. CAom 6 dxah 6 xebsym. J 6 wmwoz. J 3 u 4 mgc. Li – ngtslt 4 w. Jiz !. * ubu w. Jicli

Little Red Dog Quarry xs. Xg 6 euflj ns/s=4 • To contain diverse • xp. Qqgi 4 • • • materials including buildings, concrete, pipelines, tanks LRD has a capacity of ~100, 000 m 3 Demolition material will be ~ 50, 000 m 3 • nwy=sixg 6 h 3 l w[li 4, efox=i 3 i 4, h 9 li 4, wmcsti 4 xs. Xg 6 euflj ns/s=4 !)), )) ubw 5 r. XEtyml. A xqiz w. Atbs. J 5 wl=i 5 %), ))) ubw r. XEtyml. A xqiz

Reclamation Compoments rhbcmz 5 ckwgi=izb sttbs. Nhiz Chemicals, Reagents, Fuel and Lubricants wmw 5 w. Mnw 5, s 3 hw 5 xml s 3 ht. Dt 5

Chemicals, Reagents, Fuel and Lubricants wmw 5 w. Mnw 5, s 3 hw 5 s 3 ht. Dtl • Inventory will be • controlled to ensure minimum quantities on site at closure. Remaining materials will be: – Returned to supplier – Sold to another user – Used at another Cominco facility – Shipped to licensed disposal facility • Nnbsymi 5 rhgw. Nw 5 • Nl. Nwy. Jbsix 3 S 5 bmfx s 3 h. DJw 5 skgqvxlmzb bwvig 5 xuxfq 5 wmwbsix 3 g 5: – sttbsix 3 g 5 is==s. J=i 3 i 5 – xyzqk 5 is. Dbsix 3 g 5 – xyzzi vuff 5 Wqi xgbsix 3 g 5 – xs. Mtbslt 4 WJNstok bwmwgi m 3 lfij 5

Hazardous Materials Management hf. Ng 5 rhgw. Nw 5 xs. Mbsiq 5 • Materials to follow • rhgw. Nw x? tj 5 • · • environmentally acceptable management procedures Materials Management regulated by: – EC, (TDF Act and Regs) – Natural Resources Canada (Explosives Act, Mine Safety act) – Atomic Energy Control Ltd – GN DSD guidelines Materials include: Waste Oil, Antifreeze, Solvents, Paint, Freon, Batteries, Asbestos, PCB, Explosive • hf. Nqvlxmzb xs. Mbs. Zlxmzb cspnbslt 4 sfkz rhgw. Nw mo. Zi motbs. J 5: – x? to. Ep 5 v. Nbu – k. Nusbo. Epf 5 v. Nbu Gcttij mo. Z, s/Cyst 5 xb. Nq. Jt mo. Zq. H – c 3 typ 5 xs. Mypq 5 vgpct. Q 5 – v? mfq 5 k. NK 5 wf. W=oepf 5 mobsd/q 5 rhgw. Nsi. Cbs. J 5 wmwgcg 5: , s 3 h 6 xgbsif, dx. Eft 4, w. Mnw 5, xux 5, dx. Ef 5, Xbo 5, hf. Ngo 5 xp. Qqg 5 xml c 3 b. J 5

Reclamation Components ckwgizi sttbs. Nhizb Nl. Nw. Dtq 5 Contaminated Soil Management h. Dym. J 6 k. N nlmnbsizb xs. Mbsiz

Contaminated Soil Management h. Dym. J 6 k. N nlmnbsizb xs. Mbsiz • 1999 Phase I: – Reviewed current/historic potential areas of concern, site visit • 2000 Phase II: – Determined occurrence and extent of contamination – Found localized areas of zinc, lead and hydrocarbon contaminated soils • !((( y. Ko 3 X 6 vm. Q/siz: – eu. Dl. Q 5 m. Ns. J 6 Fbwhmi whmlbsym. J 5, k. Nz eu. Dl. A • @)))u xw. Xz vm. Q/sis. J 2 – cspnvil. A cspnbsiz xml ckt. Q h. Dymmz 5 – s/Cw n=C/nw ty. J 4 n/w 5 xeinwl xml s 3 h. DJw 5 k. Nuo 3 g 5 h. Dt. EJ 5 Nil. Q 5

Overall Objectives Reclamation g. CZENhbq 5 ckwgi=izk sttbsij 5 • To comply with Fed and • =g. D v? mf 5 k. NKul • · • Territorial Regulations Mitigate or prevent release of contaminants Aesthetically acceptable conditions – Considering: economics, climate, original land condition and future land use. · mo. Zqi mo. Qxo 5 yxm 4 tbsbwolt 4 kctl. Qli 5 hf. N 3 g 5 k. Nozb xeymiz Nm. Q/s/Exo 4 – whm. Ql. Q 5: r. Ns/4 nst 5, k. Nz, ckwgi=iz k. Nz xml y. Kiti k. Nzb xgbsinz.

Metal Contaminated Soils n=C/4 n 3 j 5 h. Dbsym. J 6 k. Nz • Numerous area where metal • • contamination is present including: waste rock and rockfill areas, surface stockpiles, process barge, shiploader dock, conveyor, concentrate storage building, tailings pipeline and thickener, snowdumps Estimated clean up quantity is 92 350 m 3 Soil will be excavated and disposed underground Excavated areas to be regraded where necessary · · · k. Ns. J 6 skglt 4 n=C/4 n 3 j 5 hfbsym. J sfx w. Mslt 4: d/Nbs. J 6 s/C 6 xml wlgym. J 5 s/Coh 3 bsvig 5, czig 5 ctytbsym. J 5, g. M 4 b=atbsym. J 6, suxj syv 3 b 3=sli g. M 4 b 3=4, sw/3 g 6 syv 3 bs 5, y 3 lx 6 n=C/nf=sli w[l, xuxf 3 l 2 h 9 lx xml ei 3 y. Jt 4, x. Sbw/w=l whm. Q/s. J 6 nlm 3 nbsixg 6 (@ #%) r 4 XEyym. J 5 xqiz no. A 3 bsli W/bsix 3 g 6 gx. Xz k. Nsl xbig 3 jbscix. Li no. A 3 bs. J 5 gx. Xohbsvi. Exo 4 w. Mzymlxiq 5

Petroleum Hydrocarbon Contaminated Soils s 3 hxlj 5 h. Dbsymiq 5 k. Nw 5 • Hydrocarbon contaminated • s 3 hxlj 5 h. Dbsym. Jw 5 • · • soils are present at the process barge area, oil storage area, diverse above-ground storage tanks Approximately 36 700 m 3 of contaminated soil (including 20 000 m 3 metal contaminated soil from the process barge) Boreholes test have indicated that permafrost restricts contamination · Nl. Nwbsym. J 5 sf. Ni. S 5 g. Mb 3=u, s 3 hxlc=u, xp. Qqg 5 k. Ns 2 czig 5 s 3 hxlcst. Q/s. J 5 wmc #^ &))ubi r 4 XEyym. J 5 h. Dym. J 6 k. N Gw. Msli @) ))) r. XEyym. J 6 n=C/4 n 6 k. N b? z g. Mb 3=uzg 6 H wfbbslt 4 x 4 mbsym. J 5 Nl. Nwyym. J 5 dxaw. N 3 g 5 h. Dt/qg 5

Petroleum Hydrocarbon Contaminated Soils s 3 hxlj 5 h. Dbsymiq 5 k. Nw 5 • Preferred Treatment Option – Treatment technology limited by metal level contamination (I. e. , barge area) – Soil to be place in underground within permafrost areas. – Free phase petroleum hydrocarbons will not be placed underground • xg 3 bsz. Dm. Z/3 g 6 – whob 3=ou nlm 3 nbs. Z/3 g 6 n=C/4 nj 5 h. Dbsym. J 6 Gh 3 l g. Mb 3=4 H – nl. A 3 bsif 5 gx. X 4 k. Ns 2 xbkbso. ZJ 6 dxaw. N 3 g 3 j 5 – s 3 hxl=i 3 bcsqiz k. N no. A 3 bs. J 6 k. Ns 2 xbk 3 bs/qg 6

Northern Community Benefits sx. N 3 us k. Nos. J 5 wv. Jyx 4 nq 5 • Potential benefits: – Disposal assets – Decommissioning contracts and employment – Post-closure monitoring and training • wv. Jtsgw. NExo 5 – WQ/s. Jm. Ji 3 g 5 Wdt. Q/s. J 5 – w. At. Eiqk 5 vg. Cbgw. NExo 5 xml WNhx 3=s. JNixiq 5 – mg/six 3 tl. A mg/stl. Al cspntslt 4 woixtbslt 4 l

Reclamation Component sttbsizb ckwgi=iqb wloq 5 Post Closure Site Management mg/s? oxtl. A bwvi xs. Mypcli

Post Closure Site Management mg/s? oxtl. A bwvi xs. Mpcli • Phase I – C&R activities to take place – Surface leases to be maintained by company – Ongoing presence by Cominco staff – Phase I expected to end in October 2004 – Monitoring: • Routine Monitoring • Testing of remediated soils • Vegetation Sampling • y. Ko 3 X 6 Wo. Ex 4 n 6 – mgiz xml ckwgizk sttbsi v. Jytbsix 3 g 5 – k. Ns 2 czi xggx 3 i 5 Wym/sq. Nlt 4 v 7 Xis. J 3 j 5 – vuff 5 WNhx 3 tq 5 m. Doeugcw. N 3 li – y. Kox. Xz Wo. Ex 4 n 6 i. Es. Q/s. J 6 whoixg 6 x 4 g. X @))$ao 3 X 5 · cwpn 3 i 6: · xf. Mwg 3 u cspnbsq. N 3 lt 4 · cspnbsq. Nli k. Nz · WDXox. J 5 cspn 3 bslt 4

Post Closure Site Management mg/sinzb m. Doeult 4 xs. Mbsiz • Phase II – 1 -2 day site inspections to be conducted in 2005, 2006, 2007, 2009 & 2011 – Sampling of Garrow Lake stability – Temperature readings from landfills – Ocean-going surface water to be sampled for metals – Inspection of main surface structure areas, subsidence areas, mine entrances and roadways – Vegetation sampling • Review of data in 2011 – if site is stable then land returns to the Crown • xw. XEobz vm. Q/sizb – slu m. Dili cspnbsli @))%ao 3 X 5, @))^ao. X 5, @))&so. X 5, @))(ao. X 5 @)!!ul – w=cspnbsli by Qx. D hi. Xoxqvlxmz 5 – b. Esj 3 Xox. J 6 cspnbsli n=C/4 ncmz 5 – wcspnbslt 4 cz k. Ns 2, ns/s=sym. Jl, s/Cys=j wy 3 b 3=q 5 xml xdtq 5 – WDgq 5 cspnbslt 4 • bwfx cspn. Dt=i 5 eu. D/slt 4 @)!!ao 3 X 5 – k. N ckwq. N 3 X 5 =g. D v? mfk sttbsli