MODERN MINING COMPANY. Environmental Performance Standards

Transcription

1 MODERN MINING COMPANY Envirnmental Perfrmance Standards

2 Cntents Envirnmental Perfrmance Standards... 3 Intrductin... 3 Envirnmental Perfrmance Standards... 3 Definitins... 4 Rles and Respnsibilities... 4 Risk Assessment... 5 Legal Requirements... 5 Training and Cmpetency... 5 Dcumentatin... 5 Perfrmance... 5 Water... 6 Land and Bidiversity... 7 Air Emissins... 8 Emissins and Resurce Efficiency... 9 Waste Rck and Ore Waste and Waste Water Tailings Rehabilitatin and Clsure Dcument Cntrl Histry Versin Descriptin Authr(s) Review Apprved Date 1 New Dcument Katie Hulmes Grup Manager Technical Services Bb Fulker Chief Operating Officer Andrew Cle Managing Directr and CEO January 2017 Cntents 2017 Page 2 f 13

3 MODERN MINING COMPANY Envirnmental Perfrmance Standards Envirnmental Perfrmance Standards Intrductin The Perfrmance Standards are an integral part f the OZ Minerals business. Their implementatin and maintenance prvides the means t: Manage and minimise threats; Identify and realise pprtunities; Cmply with statutry bligatins; Deliver a framewrk fr cntinuus imprvement; Prvide a measurement fr value-creating business perfrmance. The Perfrmance Standards apply t all Cmpany-managed Assets, their emplyees, directrs, fficers, cntractrs, cnsultants, and its subsidiaries and any ther party undertaking wrk at the Asset (Emplyees and Cntractrs). They als specify the level f perfrmance expected at nn-managed Assets. All Cmpanymanaged Assets are required t have capability based n the Standards. New r acquired Assets will undertake a Risk Assessment t determine when the Standards must be fully implemented. This Risk Assessment must be apprved by the OZ Minerals CEO. Envirnmental Perfrmance Standards The Envirnmental Perfrmance Standards are ne f fur perfrmance areas that tgether prvide the gvernance and integratin t unlck value acrss ur business. The Envirnmental Perfrmance Standards describe the minimum requirements f Assets t manage envirnmental threats and impacts assciated with specific activities r tasks, and t identify pprtunities that have the ptential t drive value creatin fr bth OZ Minerals and the cmmunities in which we perate. OZ Minerals is cmmitted t prviding a high standard f care fr the natural envirnment thrugh effective rganisatinal practices, prgressive land rehabilitatin and applicatin f impact prfiles as lw as reasnably practicable, which are central t ur cntinued perfrmance. Envirnmental Perfrmance Standards 2017 Page 3 f 13

4 MODERN MINING COMPANY Envirnmental Perfrmance Standards Our activities are undertaken within the framewrk f mining apprvals, lease cnditins and licences established by envirnmental regulatry authrities. We actively engage with lcal cmmunities and ther stakehlders during the varius stages f a mining prject, frm envirnmental apprval prcesses and explratin thrugh t develpment, prductin and clsure, t ensure the envirnmental, scial and ecnmic impacts f ur prjects are understd. OZ Minerals is cmmitted t high standards f envirnmental perfrmance amng its Emplyees. The Envirnmental Perfrmance Standards supprt OZ Minerals plicies by articulating the minimum requirements t which Emplyees and Cntractrs must adhere. Definitins All cmmnly-used terms and acrnyms used in the Health and Wellbeing Perfrmance Standards are defined in the OZ Minerals Glssary. Rles and Respnsibilities The OZ Minerals CEO is respnsible fr apprving Standards and subsequent updates. Assigned ExC members are respnsible fr maintaining the Standards and authrising supprting dcumentatin. They are als respnsible fr: Assisting management teams and practitiners at OZ Minerals Assets t understand the implementatin requirements f the Standards; Reviewing the Standards every three years (as a minimum) and updating against relevant external standards, legislatin and OZ Minerals public cmmitments; Reviewing any supprting Definitins and Guidelines and updating as required; Reprting assurance findings t the OZ Minerals bard every three years; and Ensuring that definitins and supprting dcuments are revised and updated as required. Asset leaders are accuntable fr: Implementing the requirements f the Standards at the relevant Asset; Training Emplyees and Cntractrs n the requirements f the Standards; Ensuring cnsistency between the Standards and Asset management; and Demnstrating cmpliance with the Standards thrugh OZ Minerals assurance prcesses as apprpriate t cntext, individual Standards and reprting requirements. All Emplyees, Cntractrs and Partners must be aware f and apply these Perfrmance Standards in their respective wrk areas cnsistent with Asset requirements. Assets must at all times cmply with the cntent f the Standards. Any exemptin t cmpliance with these Standards must be apprved by the OZ Minerals CEO. Envirnmental Perfrmance Standards 2017 Page 4 f 13

5 MODERN MINING COMPANY Envirnmental Perfrmance Standards Risk Assessment As a part f regular risk management assessments during due diligence and at gate reviews, all Assets, in the cntext f their Asset, must evaluate risks relevant t these Perfrmance Standards. Asset management must then apply these Standards as apprpriate t their Asset and activities. The risk management cycle must be managed in accrdance with the relevant Standards relating t risk management. Assets must identify the critical cntrls used t manage Material risks, assess their adequacy, assign Accuntability and Respnsibilities fr their implementatin and verify their effectiveness as part f their critical cntrl management. Legal Requirements All Assets must track regulatry requirements and legally binding cmmitments and ensure that required actins are scheduled, actined, mnitred and clsed ut. Recrds required t be retained under legislatin must be stred in a central lcatin. At a minimum, all Assets must meet legislative requirements. Hwever, if OZ Minerals Standards impse additinal requirements, then Emplyees and Cntractrs must meet bth the legislative requirements and the additinal requirements f OZ Minerals Standards. Training and Cmpetency All Emplyees and Cntractrs must be inducted and trained in the relevant hazards and cntrls prir t undertaking any wrk. Apprpriate training and cmpetency assessments must be undertaken. Recrds relating t training and cmpetency assessments must be dcumented and maintained. Additinal requirements, if applicable, are detailed in the specific Standards. All Assets must prvide their Emplyees, Cntractrs and Visitrs with a fit-fr-purpse inductin apprpriate t the lcal sensitivities, risks and expected behaviurs. Inductin training in the hazards assciated with a particular Asset shall be included fr new persnnel where there is a ptential fr expsure t this hazard. Dcumentatin Relevant dcumentatin verifying cmpliance with the Standards must be kept in accrdance with the relevant Dcument Cntrls Standards and relevant legal requirements. Perfrmance All Assets must peridically, as determined by a Risk Assessment, cnduct an audit f their cmpliance t the OZ Minerals Standards t ensure elements are understd and applied at a lcal level. The perfrmance f Cmpany-wned Assets will be assessed against the requirements f the OZ Minerals Standards by the Cmpany at a minimum f every three years accrding t the Assurance Prcess. Actual perfrmance measures against each element f the Standard will vary accrding t lcal cntext, and guided by supprting guidelines and prcedures. Envirnmental Perfrmance Standards 2017 Page 5 f 13

6 Water Purpse The purpse f this Standard is t define the OZ Minerals requirements t ensure that Assets effectively manage water, including prcess water, strmwater, discharges and dewatering activities. Perfrmance Planning and Management Cmply with all cnditins as specified in their water licences; Where a site des nt have legal discharge requirements, determine Asset-specific risk-based discharge criteria frm baseline cnditins, ptential pathways t receptrs, knwn adverse impacts and seek external input frm relevant specialists where necessary; Maintain a fit-fr-purpse Water Management Plan which dcuments the fllwing: Envirnmental Design Criteria fr Water Management; Relevant strategies, cntrls and management practices thrughut the prject life cycle; Internal water resurces and Asset-specific water balance, t be updated in cnjunctin with Life-f-Mine plans; Hw the prtectin f aquatic (including grundwater-dependent ecsystems), terrestrial and marine envirnments will be achieved based n defined regulatry standards and licence limits; Water quality and quantity mnitring prgrams fr the lifecycle, evaluating water resurces, pint surce and nn-pint surce discharges, and any receiving waters affected by discharge; Management f prcess water during the Asset s clsure and rehabilitatin phases; Water quality analysis cnducted by a labratry that is externally accredited; Water discharges, water extractin, strm water and mine dewatering activities t demnstrate they are in cmpliance with statutry bligatins r ther requirements such as Cdes f Practice. Water Infrastructure Design and manage facilities t preclude releases t the envirnment; Ensure that where engineering design cnstraints and climatic cnditins create a requirement fr prcess water discharge frm tailings and prcess facilities, the quality f the discharge water meets applicable standards r site-specific discharge criteria; Ensure that where a threat t grundwater exists, grundwater wells arund facilities must be installed up-gradient and dwn-gradient t mnitr fr change, based n the hydrgelgy f the area and hydraulic ptential; Ensure that the design f temprary strmwater structures is based n the level f risk f failure; Ensure that permanent strmwater structures are, at a minimum, designed and perated t withstand the 100-year, 24-hur strm event; In areas with sensitive receptrs, ensure that impundment design is risk-based; Ensure that all prcess plant strage tanks and transfer systems have secndary cntainment which is designed and sized t cntain a ptential pipeline leak r failure; Ensure that secndary cntainment f strage tanks has a typical water permeability equivalent t untreated cncrete; Have a mechanism t detect leaks where it is necessary t install undergrund piping; Ensure generated runff is diverted away frm facilities. Any pnds used t impund prcess r cntaminated water must be suitably lined depending n the characteristics f the water t be cntained and must cnsider a suitable Leak Cllectin and Recvery System. Water Water OZL-ENV-STD Page 6 f 13

7 Land and Bidiversity Purpse Land and Bidiversity The purpse f this Standard is t define the OZ Minerals requirements t ensure that effective measures are taken t prtect and manage land and bidiversity cnservatin and t minimise any adverse acute r cumulative impacts. Perfrmance Planning and Design Obtain all relevant apprvals, licences and permits t access and disturb land fr explratin r mining purpses in accrdance with statutry r ther requirements; Implement cntrl measures fr minimising access, disturbance t land and clearing f vegetatin t prevent unnecessary grund disturbance and t prtect areas f knwn high bidiversity cnservatin; Dcument ersin and sediment cntrl; Develp and implement cntrls prir t cnstructin f an Asset and thrugh the lifecycle f the Asset t manage strmwater, minimise ersin caused by uncntrlled surface water runff, and t treat impacted water generated frm disturbed areas and areas underging rehabilitatin; Design water strage facilities, diversin structures and cntainment facilities t limit and reduce fauna access and prvide easy egress; Design water crssing r diversin structures t minimise adverse impacts n the aquatic ecsystems; Identify and maintain wildlife crssings n access and haul rads based n survey data; Cntrl fauna access t cntainment facilities. Management Maintain a fit-fr-purpse Bidiversity Management Plan which dcuments the fllwing: Specialist knwledge surced and utilised in the management and prtectin f endangered r listed species, and in defining the scale f mnitring and the indicatrs mnitred; Engagement with members f the lcal cmmunity and indigenus persnnel fr assistance with bidiversity mnitring; Key bjectives that address bidiversity risks, and the cntrls implemented by the Asset t prtect flra and fauna, and specifically hw rare and endangered species and pririty cnservatin status species are prtected; Key bjectives fr hw pests and weeds are cntrlled; Where a ptential r actual adverse impact n an endangered r listed species has been identified, the ratinale fr the creatin f the impact must be described and cnsideratin fr bidiversity and/r ffset areas prvided. Ensure that envirnmental mnitring prgrams include any adverse bidiversity impacts and the effectiveness f implemented cntrl measures; Reprt any unauthrised land clearances and stck and wildlife mrtalities in accrdance with incident reprting standards and statutry requirements; Where mining twnships r accmmdatin villages are lcated in the vicinity f the mine, implement Asset prcedures t: Prhibit the unauthrised cllectin f native species by emplyees; Prhibit unauthrised hunting r trapping f native species; Minimise access t designated areas. Land and Bidiversity OZL-ENV-STD Page 7 f 13

8 Air Emissins Air Emissins Purpse The purpse f this Standard is t define OZ Minerals requirements t manage pint and nn-pint surce air emissins and ambient air quality t be prtective f bth human health and the envirnment. Perfrmance Planning and Design If a surce f air emissins, be designed, cnstructed and perated with apprpriate air pllutin cntrls in place in rder t cmply with the hst cuntry s statutry requirements; Ensure that their air pllutin cntrl equipment cmplies with defined regulatry standards and license limits; At a minimum, cmply with legislative requirements. Hwever, if the Australian Natinal ambient air quality guideline(s) impse additinal requirements, then Emplyees and Cntractrs must meet the requirements f bth the legislatin and the guidelines t determine any ptential brader cmmunity r envirnmental impact; Frmally identify all majr pint surce and nn-pint surce frms f air emissins fr all phases f the mine lifecycle and at any majr mdificatins t the Asset; Where hazardus air pllutants are ptentially emitted frm an Asset and need t be cntrlled, riskbased, cst-effective cntrl technlgies must be implemented and maintained. Management and Mnitring Maintain a fit-fr-purpse Air Quality Management Plan that defines all relevant strategies, peratinal cntrls and management practices fr all phases, and includes: Suitable mnitring and inspectin prgrams t verify that air emissin cntrls are effective and emissins are nt having an adverse effect n human health r the envirnment, inclusive f visual impacts; Dispersin mdelling where any ptential risk f impacting human health r the envirnment exists; Prcess t identify and cntrl pint surce and fugitive dust emissins where any ptential impact t Emplyees and Cntractrs, the lcal cmmunity and/r the envirnment exists; Details f peridic air quality mnitring that determine if any ptential hazardus air pllutants are being emitted frm an Asset; Where hazardus air emissins pse a significant risk t human health and the envirnment, a quantificatin f the pllutant emissins using calibrated testing equipment, mass balancing r ther apprved methds; Air quality bjectives fr air emissin surces and ambient air quality, utilising lcal legislatin, relevant Australian and/r Internatinal Standards and/r Guideline(s). Demnstrate that they have cntrlled fugitive dust emissins in accrdance with site risk assessments; Develp, implement and maintain a planned calibratin and maintenance schedule fr any emissins cntrl and mnitring equipment; Cntrl dust and significant durs based n prximity t identified sensitive receptrs. Air Emissins OZL-ENV-STD Page 8 f 13

9 Emissins and Resurce Efficiency Purpse Emissins and Resurce Efficiency The purpse f this Standard is t define the OZ Minerals requirements fr energy, accunting and resurce efficiency t meet statutry bligatins, minimise greenhuse gas emissins and drive cntinuus imprvement. Perfrmance Greenhuse Gas Emissins Identify and assess risks related t greenhuse gas emissins; Measure greenhuse gas emissins in metric tnnes f CO 2-equivalent fr direct and indirect surces; If a surce f greenhuse gas emissins, be designed, cnstructed and perated in rder t cmply with applicable laws and regulatins and incrprate efficient use f energy resurces; Develp, implement and maintain a fit-fr-purpse Energy and Greenhuse Gas Management Plan that dcuments the fllwing: Current and future surces f greenhuse gas emissins, relevant emissin factrs and an inventry f greenhuse gas emissins, including all surces f Scpe 1 and Scpe 2 emissins; Cmmercial cnsideratins assciated with greenhuse gas emissin issues (including csts assciated with carbn trading schemes r emissin regulatins); Energy saving and greenhuse gas emissin abatement prjects, supprted by perfrmance targets, that have been implemented t drive imprvements in emissins cntrl and reductin. Implementatin must be linked t the business planning and decisin making prcess and any Crprate targets; Systems and prcesses used fr meeting regulatry and vluntary bligatins, including reprting, managing risks, cntinually imprving energy efficiency and reducing greenhuse gas emissins; Operatinal cntrls fr each phase f the mine lifecycle, and where determined under legislatin, the peratinal cntrls that als apply t cntractrs and suppliers. Cnsider greenhuse gas cmmercial cnsideratins in relevant business plans and valuatins, new prject prpsals, due diligence evaluatins and capital expenditure. Energy and Natural Resurce Efficiency Ensure that apprpriate measures are in place fr metering and estimating energy and water use and prductin and greenhuse gas emissins, n at least a mnthly frequency; Ensure that all measures meet applicable regulatry requirements r are therwise cnsistent with relevant Internatinal Standards; Develp and implement prgrams t: Verify identified energy saving and greenhuse gas emissins abatement prjects are effective; Ensure nging identificatin f energy and resurce efficiency imprvement prjects; Use emissins abatement cst curves, assess emissins trading and ffset pprtunities, and cnsider available renewable energy technlgies; Cnsider changes as a result f Natinal r Internatinal plicies and measures; Dcument, review and ptimise the water distributin netwrk t maximise efficiencies; Ensure water management systems and prcesses are fully functinal and perating prperly; Analyse water quality and usage/cnsumptin trends and utilise a crrective actin system. Emissins and Resurce Efficiency OZL-ENV-STD Page 9 f 13

10 Waste Rck and Ore Purpse Waste Rck and Ore This purpse f this Standard is t define the OZ Minerals requirements fr the management f waste rck and re t prevent adverse envirnmental impacts, and reduce pst mining rehabilitatin and clsure liability. Perfrmance Engineering and Operatins Design, cnstruct and rehabilitate waste rck dispsal facilities accrding t relevant licence and statutry bligatins. These facilities must: Be getechnically stable with a minimum factr f safety f 1.3 static and 1.0 pseud-static cnditin; Prvide fr bth trial and prgressive rehabilitatin; Incrprate measures t cntrl the generatin f acid; Include retentin basins sufficiently sized t cntain the runff resulting frm a 25-year, 24-hur strm event, r greater, depending upn the risk psed; Cntrl surface water run n and run ff during cnstructin, rehabilitatin and clsure/pst-clsure t ensure slpe stability and minimise lw-quality seepage, ersin and sedimentatin; Be mnitred t verify they are being cnstructed t the design criteria and t detect any pssible abnrmal cnditins, such as subsidence, run n r run ff cntrl requirements; Be inspected fllwing heavy rainfall t bserve fr pnding n the surface, slumping n slpes, disclratin r seepage frm the te, effectiveness f the diversin and sediment cntrl. Planning and Management Implement a waste rck and re tracking system and demnstrate that waste rck has been prperly characterised and ruted t the apprpriate facility; Retain a lg f material types and dispsal lcatins; Ensure that dispsal f any slid r hazardus waste in the waste rck dispsal facility is accmpanied by a scientifically defensible study that demnstrates that the waste is cmpatible with dispsal in the waste rck dispsal facility, cmplies with laws and permits, and will nt cmprmise rehabilitatin and clsure success; Cnduct stabilisatin and prgressive rehabilitatin activities as sn as practicable; Establish and mnitr rehabilitatin success criteria and bjectives t validate agreed clsure cmpletin criteria. Material Classificatin Ensure that waste rck is physically and gechemically characterised at all stages in the mine lifecycle; Determine acid rck drainage (ARD) ptential f waste rck using a reliable acid-base accunting methdlgy; Cnduct nging peridic characterisatin in the frm f kinetic tests t cnfirm ARD predictins are based n static test results; Ensure that Assets with knwn net acid-generating re and waste rck maintain a fit-fr-purpse Waste Rck Management Plan. Ptentially acid-generating material must: Be managed t prevent the release f pllutants t the receiving envirnment; Nt be used fr cnstructin purpses utside f a cntrlled waste management system; Be used in a balance, updated fr adequacy at clsure, with nn-acid generating material t evaluate and design cntrls t islate acid-generating material. Waste Rck and Ore OZL-ENV-STD Page 10 f 13

11 Waste and Waste Water Purpse Waste and Waste Water The purpse f this Standard is t define the OZ Minerals requirements fr minimising waste generatin, ptimising recycling, and managing hazardus wastes, nn-hazardus wastes and waste water. Perfrmance Maintain a fit fr purpse Waste Management Plan. The plan must describe cntrls and prcesses fr: Identifying ptential waste streams and their surces fr all phases f the prject; Segregating and dispsing f hazardus wastes and nn-hazardus wastes in cmpliance with statutry bligatins; Ensuring recrds fr the strage, transprtatin and dispsal f all waste streams are maintained, including types and quantities f waste and waste tracking certificates; Ensuring that key bjectives that address identified waste management threats are peridically reviewed and describe the cntrls implemented by the Asset. Landfill, Onsite and Offsite Dispsal Audit ffsite treatment and dispsal facilities prir t their selectin and peridically during use t verify that the facility is engineered and perated in accrdance with licence cnditins; Ensure that n-site engineered dispsal ptins are supprted by scientific studies that demnstrate cmpliance with laws and permits; Ensure that burial f wastes in dedicated lcatins is cmpliant with statutry bligatins; Ensure that medical wastes are dispsed f ffsite r burned in a high temperature incineratr nsite; Establish bespke facilities fr n-site strage f hazardus wastes; Ensure that landfills are designed, cnstructed and perated t ensure getechnical stability f slpes r trenches; Ensure that the ptential fr and vlumes f cntaminated leachate generatin and the estimated leachate impact frm landfills are evaluated and managed and any discharges meet any applicable standards; Ensure that wastes dispsed f in the landfill are rutinely cvered; Only burn waste at landfills where permitted in writing by the relevant authrity; Sewage Wastewater Treat wastewater using sewage treatment plants r septic systems that meet statutry requirements; Design and cnstruct sewage treatment plants accrding t the current and freseeable future vlumes t be treated; Demnstrate the adequate discharge take-up capacity f the receiving envirnment using perclatin tests prir t lcating and installing septic infiltratin trenches; Manage sediment/sludge frm sewage treatment plants in accrdance with statutry requirements; Verify that n waste streams ther than waste water are cnnected t n-asset sewage systems; Ensure that sewage treatment plant effluent parameters are mnitred in accrdance with licence cnditins and use the results t ptimise plant perfrmance; Either mnitr grundwater dwn gradient f septic infiltratin trenches r demnstrate that n effect t grundwater resurces is expected. Waste and Waste Water OZL-ENV-STD Page 11 f 13

12 Tailings Tailings Purpse The purpse f this Standard is t define the OZ Minerals requirements fr the lng-term safe impundment f mine tailings and residues t prevent uncntrlled releases int the envirnment. Perfrmance Ensure that all Tailings Strage Facilities (TSF) designs analyse seepage rates, seepage water quality and the resulting impact n the beneficial use f grundwater and surface water, ver bth the shrt- and lng-term (pst clsure) impacts and liabilities; Ensure that the supernatant pnd size is minimised t prevent seepage t grundwater and be lcated away frm the walls f the TSF; Where a liner system has been installed, ensure that the ftprint f the supernatant pnd remains within the bundary f the liner t prevent a direct hydraulic pathway t the grundwater; Ensure that tailings are physically and gechemically characterised and data is utilised in the design f the TSF; Determine the acid rck drainage (ARD) ptential f tailings using a reliable acid-base accunting methdlgy, and cnduct nging peridic tailings characterisatin in the frm f kinetic tests t cnfirm ARD predictins based n static test results; Ensure that the TSF is designed, cnstructed, perated, clsed and rehabilitated t: Cmply with regulatry and licence requirements; Maintain minimum freebard, as specified by design, statutry requirements r water balance; Maintain piez metric head in the embankment and tailings within design specificatins; Be getechnically stable, even in high seismic areas, in accrdance with relevant engineering standards; Be prtective f avian and terrestrial wildlife; Prevent cntaminatin f grundwater and surface water; Prevent uncntrlled releases f supernatant material resulting frm a 25-year, 24-hur strm event; Withstand the run-ff frm a 100-year, 24-hur strm event. Develp a TSF Operatins Management Plan t ensure safe practices are cnducted in accrdance with statutry bligatins and design and t minimise shrt- and lng-term threats assciated with the TSF; Maintain final as-built dcumentatin with assciated independent QA/QC reprts ver the life f the prject until lease relinquishment is achieved; Audit the TSF fr getechnical stability by a qualified engineer n an annual basis; Develp and implement a detailed mnitring plan fr the TSF and cntinue mnitring thrugh the pstclsure perid until clsure and rehabilitatin is apprved by the gverning agency. Tailings OZL-ENV-STD Page 12 f 13

13 Rehabilitatin and Clsure Purpse Rehabilitatin and Clsure The purpse f this Standard is t define the OZ Minerals requirements fr rehabilitatin and clsure planning and the management f lng-term liabilities assciated with OZ Minerals Assets. Perfrmance Mine Clsure Plan Maintain a fit fr purpse Mine Clsure Plan which is reviewed annually until the cmpletin f decmmissining and clsure. The plan must: Include: Rehabilitatin and clsure bjectives and criteria; Methds used fr rehabilitatin and clsure f varius aspects f the Assets; As-built surveys fr structures; Asset liquidatin; Actual versus estimated csts. Be cmpleted t avid the need fr in perpetuity water treatment; Be cmpleted t meet rehabilitatin and clsure cmpletin criteria, achieve the pst-mining, designated land use and t minimise envirnmental liability; Include drawdwn predictins, water quality and quantity issues and ersin cntrl; Prvide technical and financial evaluatin f any mdificatin t an Asset; Detail bnd release requirements, permit/licence requirements and mnitring prgrams; Define preliminary r prpsed pst-mining land use(s) as defined by any relevant legal bligatins r agreements with external stakehlders; Utilise suitable predictive mdels t evaluate rehabilitatin and clsure design ptins fr the cver design fr waste rck dispsal facilities cntaining acid-frming materials; Describe the final landfrms and the visual amenity bjectives in relatin t the pre-mining landfrm; Prvide the bidiversity requirements inclusive f rehabilitatin success criteria that have been develped in frmal agreement with relevant stakehlders; Detail the decmmissining f Asset-based waste facilities and wastes generated during decmmissining; Describe hw the rehabilitated tailings strage facility landfrm will prvide psitive external drainage; Describe hw the waste rck facilities will be getechnically and gechemically stable and minimise ersin; Describe hw the physical and gechemical characteristics f the waste rck have been cnsidered in the design t cntrl infiltratin and seepage thrugh the base f the dispsal facility; Define the mnitring and pst-clsure management, inclusive f assciated cst estimates, that will cntinue until the Asset is fficially relinquished. Pst clsure, review the Mine Clsure Plan every three t five-years; Submit cmprehensive recrds fr rehabilitatin and clsure activities t OZ Minerals Crprate, which must be subsequently maintained fr at least 10 years after lease relinquishment; Ensure that rehabilitatin and clsure liability cst estimates fr Life f Mine and fr existing disturbance are reviewed and updated annually in cnjunctin with the Asset budget prcess. Rehabilitatin and Clsure OZL-ENV-STD Page 13 f 13