Setting up a Recirculating Aquaculture System (RAS) facility requires meticulous supervision, especially during construction, to ensure the environment is safe for workers and the infrastructure meets quality standards. In Kenya, where aquaculture is rapidly expanding to meet fish demand, supervising construction involves managing risks associated with building activities and safeguarding personnel involved in the process. This chapter addresses critical aspects of safety during hatchery construction, focusing on the use of personal protective equipment (PPE) and general safety measures to prevent accidents and promote a secure working environment.

2.1 Use of PPEs in hatchery construction

The construction phase of a RAS hatchery involves various physical hazards such as exposure to sharp tools, heavy materials, dust, and chemicals like cement. In Kenya’s aquaculture sector, where many construction projects take place in rural and peri-urban settings, the correct use of PPE is essential to protect workers from injuries and occupational illnesses. Supervisors must enforce the use of appropriate PPE to comply with national occupational safety regulations and ensure continuous productivity.

2.1.1 Types of PPE used in hatchery construction

Different tasks during hatchery construction require specific PPE to protect various body parts. Common PPE includes:

• Safety helmets: Protect the head from falling objects or accidental bumps during wall building or equipment installation.
• Safety goggles: Shield eyes from cement dust, flying debris, or chemical splashes encountered when mixing plaster or working with water treatment chemicals.
• Gloves: Provide hand protection against cuts, abrasions, and chemical exposure when handling masonry tools or pipes.
• Safety boots: Offer foot protection from heavy objects, sharp nails, and slippery surfaces common on construction sites.
• Dust masks or respirators: Prevent inhalation of dust and harmful particles, especially during plastering or excavation activities.

2.1.2 Importance of PPE compliance in Kenyan aquaculture sites

PPE compliance reduces the risk of workplace injuries and enhances worker confidence. In Kenya, government agencies such as the Directorate of Occupational Safety and Health Services (DOSHS) mandate PPE use on construction sites. For example, at a county government-run fish hatchery in Kisumu, strict PPE enforcement has led to a significant drop in hand injuries and respiratory complaints. Ensuring workers understand the rationale behind PPE use encourages adherence and fosters a safety culture in aquaculture construction projects.

2.1.3 Supervisory roles in enforcing PPE use

Supervisors must actively monitor PPE use by conducting regular safety briefings and on-site inspections. Their responsibilities include:

• Verifying that all workers are correctly equipped before commencing tasks.
• Providing training on the proper use and maintenance of PPE.
• Replacing damaged or worn-out PPE promptly to maintain effectiveness.
• Documenting compliance and reporting any violations for corrective action.

This proactive approach ensures safety protocols are respected, minimizing downtime caused by accidents or health issues.

2.1.4 Maintenance and storage of PPE on site

Proper care of PPE prolongs its lifespan and maintains protection standards. Construction sites in coastal areas like Mombasa face challenges such as humidity and salt exposure that can degrade equipment. Supervisors should:

• Instruct workers to clean PPE after use, especially goggles and masks.
• Store PPE in dry, shaded areas to prevent material deterioration.
• Schedule routine checks to assess PPE condition and functionality.

Maintaining PPE in good condition is as important as wearing it, ensuring continuous protection throughout the construction period.

Chapter Summary

This chapter covers the supervision of constructing a recirculating aquaculture system facility, beginning with the essential use of personal protective equipment to ensure safety during hatchery construction. It emphasizes the importance of observing comprehensive safety measures throughout the construction process. The correct handling and use of materials, supplies, tools, and equipment are detailed to maintain efficiency and quality. Site clearing and shade construction are key initial steps in building the RAS shed, followed by the installation of critical components such as culture tanks, sorting and packaging tables, incubation units, and plumbing works. The chapter also addresses the construction of outdoor culture units, including earthen and liner ponds as well as plastic and concrete tanks. Proper installation of waste disposal systems is discussed, highlighting different waste types, disposal facilities, and recycling options. Finally, basic civil works like landscaping, walkways, gate and perimeter fence installation, parking areas, and access roads are covered alongside the installation and testing of water intake structures, piping, overhead tanks, and drainage systems to complete the facility setup.