MODEC Guyana Inc. (MOG) seeks information from qualified and experienced SUBCONTRACTORS capable of conducting comprehensive Occupational Hygiene (OH) Surveys on a Floating Production, Storage, and Offloading (FPSO) facility operating offshore Guyana. Surveys must align with applicable Guyana regulations, International Association of Oil & Gas Producers (IOGP) guidance, and American Conference of Governmental Industrial Hygienists (ACGIH) standards.

Compliance hierarchy: Guyana statutory requirements take precedence, followed by IOGP/ACGIH best practices, then other recognized standards. SUBCONTRACTORS must confirm adherence to this hierarchy.

Surveys and Assessments (FPSO-specific)
Conduct the following Occupational Hygiene surveys — including but not limited to — for FPSO operations in Guyana, encompassing production modules, utilities, marine systems, cargo tanks/offloading, accommodations/life-support areas, workshops, paint stores, laboratories, galley/food services, waste and sewage treatment, helideck, and SIMOPS interfaces:

1. Chemical Exposure Assessments:
• Hydrogen Sulfide (H2S), Benzene, BTEX compounds, Volatile Organic Compounds (VOCs), solvents.
• Welding fumes, including metals and hexavalent chromium where applicable.
• Diesel engine exhaust particulates, Polycyclic Aromatic Hydrocarbons (PAHs), and isocyanates from coatings.
• Refrigerants, cleaning, and disinfection agents.

2. Noise and Vibration Surveys:
• Full-shift personal dosimetry and area sound level mapping. Noise criteria shall conform to the American Bureau of Shipping (ABS) HUB(OS) notation.
• Hand–arm and whole-body vibration assessments (accelerations).

3. Thermal Stress Evaluations:
• Heat stress monitoring using Wet Bulb Globe Temperature (WBGT) measurements.
• Thermal comfort assessments in hot and humid modules; cold stress evaluations where applicable.

4. Indoor Air Quality (IAQ) Assessments:
• Monitoring of CO2, CO, ozone, particulates, VOCs in accommodations, control rooms, and laboratories.
• Evaluation of ventilation and pressurization systems.

5. Biological Hazard Evaluations:
• Potable water quality testing and Legionella risk management sampling.
• Assessment of aerosolized biological agents in wastewater and sewage treatment areas.

6. Lighting Surveys:
• Task- and area-specific lighting assessments.

7. Ergonomic and Manual Handling Risk Assessments:
• Evaluation of key tasks for ergonomic risks and manual handling challenges, including for office stations and routine manual handling tasks.

8. Confined Space Atmospheric Testing:
• Development of a testing strategy for representative confined spaces, assessing oxygen levels, flammable gases, and toxic substances.

9. Naturally Occurring Radioactive Material (NORM) and Radiation Screening:
• Screening of produced fluids and equipment for NORM/radiation.
• Asbestos and lead surveys, contingent upon material presence and age; vendors must justify inclusion or exclusion.

10. Breathing Air Quality Assessments:
• Evaluation of supplied-air systems and escape sets, where applicable.

Survey Methodology Requirements
• For each survey category, SUBCONTRACTOR must specify:
– Personal versus area sampling methodologies.
– Task-based versus full-shift assessments.
– Suggested representative Similar Exposure Groups (SEGs).
– Preliminary sampling counts.
– Time-weighted versus short-term exposure limits.
– Campaign frequency (baseline, routine, change-of-conditions).

• SUBCONTRACTORS are required to propose refinements to SEGs and sampling strategies based on site walkdowns and operational data.
Requirements
Standards and References
• Surveys must adhere to:
– Applicable Guyana laws, regulations, and authority guidance (e.g., as referenced by the World Bank Group Environmental, Health and Safety (EHS) General Guidelines (2007) and EHS Guidelines for Offshore Oil and Gas Development (2015)).
– IOGP guidance documents.
– ACGIH Threshold Limit Values (TLVs), Biological Exposure Indices (BEIs), and Industrial Hygiene survey practices.
– Internationally recognized analytical and field methods (e.g., NIOSH, OSHA, ISO, EN).

SUBCONTRACTORS must list the exact editions, method numbers, and Occupational Exposure Limits (OELs) applied. Where Guyana-specific OELs or methods exist, they take precedence; otherwise, default to ACGIH TLVs/BEIs with justification.

Methodologies and Quality Assurance/Quality Control (QA/QC)
• Sampling and analytical methods must be validated and traceable, with pre- and post-calibration traceable to national standards.
• Instrumentation specifications must include:
– Datalogging dosimeters.
– Sampling pumps.
– Sorbent tubes.
– Passive badges.
– Direct-reading instruments.
– WBGT meters.
– Noise meters.
– Vibration analyzers.
– IAQ meters.
– Water sampling kits.
– Light meters.
– Radiation detectors.
– Accelerometers.
• Include minimum performance requirements and recent calibration certificates for all instruments.
• Maintain chain of custody, utilize accredited laboratories (state preferred accreditation), and ensure detection limits are fit-for-purpose.
• Implement field blanks, duplicates, and QA splits.
• Ensure data integrity, version control, and maintain an audit trail.

Personnel Qualifications and Competency
• Personnel must demonstrate Occupational Hygiene competency (e.g., Certified Industrial Hygienist (CIH), British Occupational Hygiene Society (BOHS) certifications, or equivalents) and have offshore experience on FPSOs or similar facilities.
• Ensure compliance with Guyana-specific requirements, including necessary local registrations, work permits, and local content participation as applicable.

Health, Safety, and Environment (HSE), Access, and Logistics
• Ensure compliance with FPSO HSE rules, including inductions, Simultaneous Operations (SIMOPS) coordination, and PTW systems.
• Adhere to Personal Protective Equipment (PPE) requirements, safety certifications, medevac readiness, and emergency response alignment.
• Plan for mobilization and demobilization, sample shipping logistics from offshore to accredited laboratories, and import/export of equipment and chemicals as needed.

Reporting and Deliverables
• Provide a consolidated report per campaign, including:
– Executive summary.
– Methods.
– Sample logs.
– Calibration certificates.
– Raw and processed data.
– OEL evaluations.
– Exceedance analysis.
– Heat and noise maps.
– IAQ and water quality results.
– Risk ranking.
– Recommendations.
– Photographic logs.
– Action plan with priorities and timelines.
• Provide a compliance crosswalk mapping each survey and finding to Guyana regulatory clauses and to IOGP/ACGIH references.
• Submit digital data in open formats (CSV/XLSX for datasets; PDF for reports; GIS/PNG for maps as applicable).
• Provide a data dictionary and metadata.
• Include a repeatable survey plan and proposed monitoring frequencies by area/SEG.