Occupational Hygiene And Environmental Testing at Billiard South.

Service Requirements at Billiard South

Occupational hygiene and environmental testing at Billiard South demands a contractor configuration calibrated to the specific exposure profile of a Channel Iron Deposit open-cut operation. CID extraction generates characteristically fine, friable particulate with elevated silica fractions — a dust profile that differs materially from hard-rock hematite operations and requires monitoring programs designed accordingly, including respirable dust and crystalline silica sampling at frequencies commensurate with active bench and crushing activity. The wet/dry crush and screen processing infrastructure on site introduces fixed-plant noise exposure zones requiring baseline and periodic audiometric-linked noise dosimetry, while the extensive pit dewatering network — spanning bore installations and a high-capacity transfer main — creates discrete water quality monitoring obligations that must be scoped into any environmental testing program. Hamersley Iron – Yandi Pty Limited (subsidiary of Rio Tinto Iron Ore) operates this site under Rio Tinto's HSEC Standards and Critical Risk Management Program, which impose defined exposure limits, monitoring frequencies, and reporting hierarchies that contracted hygiene providers must integrate into their service delivery model from day one. Scope documentation should specify a minimum monitoring frequency of quarterly personal exposure assessments for respirable crystalline silica as a minimum performance threshold.

• Respirable Crystalline Silica (RCS) Monitoring Capability: Demonstrated capacity to conduct personal exposure monitoring for RCS in accordance with AS 2985 and AIOH guidance, with laboratory NATA accreditation for gravimetric and XRD silica analysis; minimum 24 months of documented CID or comparable friable-ore dust monitoring within the last 5 years.
• Noise Dosimetry and Audiometric Program Integration: Provision of calibrated Type 1 or Type 2 sound level meters and personal noise dosimeters with current NATA-traceable calibration certificates; contractor must demonstrate capacity to deliver site noise mapping and individual dosimetry reports linkable to site audiometric records, with turnaround of written reports within 10 business days of field sampling.
• Environmental Water Quality Testing: NATA-accredited laboratory analysis for site water samples covering parameters relevant to pit dewatering discharge (pH, TDS, heavy metals suite, and hydrocarbons as a minimum); field sampling personnel must hold current Certificate IV in Laboratory Techniques or equivalent, with documented experience on dewatering-intensive open-pit operations.

Site-Specific Operational Constraints

Conditions procurement must communicate to all bidders in tender documentation for Billiard South.

• Environment: Pilbara ambient conditions impose a sustained summer temperature of 45°C, with recorded peaks to 48°C — sampling equipment including pumps, filters, and calibration devices must carry documented derating or validated performance protocols for operation at these temperatures. Dust loading during dry season is severe; field sampling consumables (cassettes, filters, tubing) must be pre-staged on site to prevent supply interruption during peak monitoring windows. Wet season access constraints and cyclone stand-down protocols must be addressed in the contractor's mobilisation plan.
• Logistics: Billiard South sits approximately 1,071 km from Perth, with Newman the nearest service hub at approximately 75 km. Contractors must demonstrate pre-positioned consumable stock — including sampling media, calibration gases, and PPE — sufficient for a minimum 4-week unresupplied operating window. All equipment and personnel movements must be compatible with haul road access and integration into Hamersley Iron's site access protocols.
• Response SLA: For scheduled hygiene monitoring campaigns, a minimum 5-business-day mobilisation notice is required. For unplanned incident-triggered environmental sampling (e.g. dewatering discharge event, dust exceedance), contractors must demonstrate a 12–24 hour mobilisation capability from Newman or an equivalent Pilbara staging point.
• Roster: All personnel must be FIFO-compatible, operating via Paraburdoo or Tom Price aerodrome. Roster patterns must align with site swing schedules; contractors must nominate a minimum of two qualified hygienists available for back-to-back swing coverage to prevent monitoring program gaps during personnel changeover.
• Camp/facilities: Contractors must confirm self-sufficiency for accommodation and messing or formally confirm site-provided camp access with Hamersley Iron – Yandi Pty Limited (subsidiary of Rio Tinto Iron Ore) prior to RFQ submission. Laboratory sample storage requirements (temperature-controlled holding for water samples) must be addressed in the contractor's logistics plan, as on-site laboratory infrastructure cannot be assumed.

Contractor Capability Checklist

Minimum evaluation criteria for shortlisting Occupational Hygiene & Environmental Testing contractors at Billiard South. Each criterion must be verifiable via documentation submitted with tender response.

• Technical certifications: NATA accreditation (or documented NATA-accredited laboratory subcontract arrangement) for respirable dust gravimetric analysis, XRD crystalline silica quantification, and environmental water chemistry; accreditation schedule must be current and submitted with tender response.
• Personnel tickets: Lead hygienist must hold a minimum Certificate in Occupational Hygiene (COH) from the Australian Institute of Occupational Hygienists (AIOH) or equivalent recognised qualification; all field personnel must hold a current WA General Construction Induction (White Card) and a valid site-specific surface mining induction or demonstrate capacity to complete prior to mobilisation.
• Mobilisation SLA: Documented evidence of 12–24 hour unplanned mobilisation from a Pilbara-region staging point, supported by at least one reference from an equivalent remote open-pit operation in WA within the last 3 years.
• Public Liability insurance: Minimum AUD $20M per occurrence (Certificate of Currency required with tender submission).
• Professional Indemnity: Minimum AUD $10M aggregate — mandatory given that occupational hygiene services constitute technical advice and exposure assessment outputs used in regulatory reporting and health surveillance decisions.
• Workers Compensation: Full statutory cover under WA law (WorkCover WA — Injury Management Plan required and must be submitted with tender response).
• Site exposure: Minimum 3 years of documented occupational hygiene and environmental testing delivery on open-cut iron ore or comparable hard/friable-ore operations in the Pilbara or equivalent remote WA mining district, with verifiable client references.
• Safety systems: HSE management system certified to ISO 45001 or equivalent; contractor must demonstrate ICAM-trained personnel available for incident-triggered sampling deployments, consistent with Rio Tinto's Critical Risk Management Program requirements.

Regulatory & HSE Framework

Occupational hygiene and environmental testing at Billiard South is governed by the Work Health and Safety Act 2020 (WA) and the Work Health and Safety (Mines) Regulations 2022 (WA), administered by WorkSafe WA. Contractors must be conversant with the specific exposure standard obligations under these instruments, including the 0.05 mg/m³ TWA for respirable crystalline silica introduced under the current regulatory framework — a threshold directly relevant to CID dust characterisation programs at this site. Environmental monitoring obligations intersect with conditions attached to site approvals and dewatering licences; contractors must demonstrate familiarity with the relevant environmental authorisation framework applicable to Pilbara open-cut operations. Supplier registration via the Avetta platform and the Rio Tinto Supplier Portal (https://www.avetta.com/ and https://www.riotinto.com/procurement) is required as part of prequalification — portal registration must be completed and confirmed before RFQ participation is permitted. All contractors must complete site-specific induction via Hamersley Iron – Yandi Pty Limited (subsidiary of Rio Tinto Iron Ore) procedures before mobilisation.

Sourcing Qualified Contractors

No confirmed tender activity for occupational hygiene and environmental testing at Billiard South is on record at the time of this briefing; procurement should treat this as a clean-slate sourcing exercise. The regional contractor pool for occupational hygiene and environmental testing services in the Pilbara is active and documented across dedicated WA mining services directories, with multiple providers holding NATA-accredited laboratory arrangements and established FIFO-capable field teams. Newman, approximately 75 km from site, functions as the primary logistics and personnel staging hub for this service category, and shortlisted contractors must demonstrate an established presence or formal staging arrangement in Newman or an equivalent proximate Pilbara centre. No incumbent contractors are confirmed for this scope. Procurement teams engaging this market must allow a minimum of 6–8 weeks for prequalification, Avetta compliance verification, and onboarding via the Rio Tinto Supplier Portal before RFQ responses can be formally evaluated.