Service Overview: Bestcare Cleaning provides a comprehensive, four-stage water tank cleaning process for Nairobi homes and businesses. This meticulous procedure ensures your stored water is free from sediment, biofilm, algae, and harmful pathogens, safeguarding your family’s or tenants’ health. Our team uses professional-grade equipment, eco-friendly cleaning agents, and follows strict safety protocols. The checklist below details every step we undertake.
Stage 1: Pre-Cleaning Preparation & Safety
This initial stage is critical for planning, customer communication, and ensuring the safety of both our technicians and your property.
| Checklist Item | Detailed Description & Standards |
|---|---|
| 1.1 Customer Consultation | Record tank location (underground, rooftop, ground-level), type (plastic, concrete, steel), capacity, and access points. Discuss water usage patterns and any specific concerns (e.g., visible sediment, odor). |
| 1.2 Site Risk Assessment | Identify hazards: electrical wiring near tank, slippery surfaces, confined space entry requirements (for underground tanks), structural integrity of roof or tank stand. |
| 1.3 Preparation Notification | Advise the client on required water usage cessation. Recommend storing adequate water for the cleaning period (typically 4-8 hours). |
| 1.4 Equipment & Material Mobilization | Ensure arrival of: high-capacity suction pumps, pressure washers, scrubbing tools (long-handled brushes, non-abrasive for plastic tanks), wet-vacuum, disinfectant (sodium hypochlorite solution at recommended concentrations), safety gear (gloves, boots, goggles, harnesses for confined spaces), and wastewater containment tools. |
| 1.5 Safety Setup | Erect warning signs if working in common areas. Secure the work area. For rooftop tanks, set up fall arrest systems. Ensure adequate ventilation for enclosed tank spaces. |
Stage 2: Draining, Scrubbing & Waste Removal
The core cleaning phase focuses on the physical removal of all debris and contaminants from the tank interior and surfaces.
| Checklist Item | Detailed Description & Standards |
|---|---|
| 2.1 Complete Drainage | Connect submersible pump to drain all existing tank water. Water is directed to drainage points as per Nairobi Water Authority guidelines, never to storm drains or gardens (to avoid contaminating soil). |
| 2.2 Manual Sludge Removal | Technicians enter tank (if safe and accessible) to manually scoop and remove all settled sludge, silt, sand, and rust from the tank floor. This is the most labor-intensive but vital step. |
| 2.3 High-Pressure Washing (Internal) | Use industrial pressure washer (adjusted for tank material) to scour all interior walls, floor, ceiling (baffles for concrete tanks), and corners. Remove all stuck-on algae, scale, and biofilm. |
| 2.4 Detailed Mechanical Scrubbing | Apply detergent or mild, approved cleaning solution. Use specialized brushes to scrub every surface, focusing on seams, joints, and inlet/outlet points where buildup is common. |
| 2.5 Wastewater Evacuation | Use a wet-vacuum or pump to remove all dirty water, dislodged debris, and cleaning solution residue from the tank floor. Ensure the tank is left completely empty of wash water. |
| 2.6 Visual Inspection (Pre-Disinfect) | Conduct a thorough visual check for any remaining contamination, cracks (in concrete tanks), or structural damage. Report any issues immediately to the client. |
Stage 3: Disinfection, Rinsing & Refilling
This stage eliminates microorganisms and ensures no chemical residues remain, making the water safe for storage.
| Checklist Item | Detailed Description & Standards |
|---|---|
| 3.1 Disinfectant Application | Prepare a precise chlorine-based disinfectant solution, typically 50-100 ppm sodium hypochlorite, in accordance with WHO/Nairobi health guidelines for potable water. |
| 3.2 Surface Disinfection | Apply the solution evenly to all interior surfaces using low-pressure sprayers, ensuring complete coverage. Allow the disinfectant to coat and remain in contact with surfaces for a minimum of 20-30 minutes to kill bacteria, viruses, and other pathogens. |
| 3.3 Potable Water Rinse | After contact time, thoroughly rinse all tank surfaces with clean, potable water. Rinse twice to ensure all disinfectant solution is removed from the tank surfaces. |
| 3.4 Final Waste Removal | Pump out all rinse water from the tank, ensuring no residual chlorine mix remains at the bottom. |
| 3.5 Clean Water Refill | Close tank outlets and begin refilling the tank with fresh, clean municipal or borehole water. The tank is filled to its normal operating level. |
| 3.6 Final In-Tank Disinfection | Introduce a measured, safe residual amount of chlorine (typically 0.5-1 ppm free chlorine) into the full tank of water. This maintains water quality during storage. Circulate water by running taps briefly. |
Stage 4: Post-Service Verification & Documentation
Our service concludes with quality checks and providing you with records for maintenance and health compliance.
| Checklist Item | Detailed Description & Standards |
|---|---|
| 4.1 External Cleaning & Site Tidiness | Clean the exterior of the tank, lid, and surrounding area. Remove all equipment, waste, and materials from the site. Leave the site neater than we found it. |
| 4.2 Lid & Vent Security | Ensure the tank lid is properly sealed and secured to prevent mosquito breeding and dust/contaminant entry. Check that insect-proof vents are intact and functional. |
| 4.3 Functional Check | Verify that inlet (ball valve operation), outlet, and overflow pipes are functioning correctly and are not leaking post-service. |
| 4.4 Water Clarity Test (Visual) | Draw a sample of water from a tap connected to the cleaned tank into a clear glass. Check for perfect clarity, absence of particles, and no unusual odor. |
| 4.5 Client Handover & Demonstration | Walk the client through the work done. Show the clarity of the water sample. Advise that water for drinking can be used after 1-2 hours, or once slight chlorine smell dissipates. |
| 4.6 Service Documentation | Issue the client with a Service Completion Certificate detailing: date, tank details, technician names, chemicals used (with dilution rates), and any observations/recommendations. This is crucial for landlords, healthcare facilities, and restaurants for compliance. |
| 4.7 Advisory Report | Provide written advice on optimal re-cleaning frequency (recommended every 6 months for overhead tanks, 12 for underground), tips for maintaining water quality, and signs of contamination. |
