Buying treatment equipment does not complete a school's water-management task. This original recording approach helps administrators in Cambodia and Laos identify the source, supply path, responsible people and response to abnormal operation. It is not a survey of either country's schools or a list of local legal limits.
Draw the supply path
Identify the source, school inlet, tanks, treatment stages, downstream storage and drinking outlets. Give each location an identifier and owner. Show any bypass supplying selected outlets. Keep a record of interruptions, refills, source changes and holiday shutdowns so problems can be compared with actual events.
One sample at the treatment outlet does not represent every drinking point. Appropriate personnel should define the sampling locations, parameters and frequency based on intended use, local requirements and site risks. Follow the laboratory's instructions for containers, transport and time limits.
| Record area | Information to retain |
|---|---|
| Daily operation | Source, equipment state, abnormalities and metered volume if available |
| Tank maintenance | Date, operator, procedure reference and return-to-use confirmation |
| Consumables | Full model, batch, date and reason for replacement |
| Testing | Sample point, time, report reference and resulting action |
| Issue closure | Interim measure, owner, completion and basis for restoration |
Avoid assigning every task to a vague “school responsibility”. Name a daily operator and a person authorised to decide on abnormal operation. Define holiday and absence cover. Keep supplier, building-maintenance and laboratory duties distinct in the project agreement.
Plan shutdown and reopening separately
Use the equipment instructions to determine shutdown and preservation. Before reopening, check storage, pipes, consumables and equipment, then complete the necessary flushing, maintenance and testing under the site's plan. There is no single restart procedure suitable for every cartridge, membrane or disinfection device.
Where contamination is suspected or significant abnormalities occur, follow the school's emergency procedure to suspend the affected supply, arrange water confirmed suitable for drinking and investigate. Return to use needs a documented basis. Clear appearance or a restored TDS reading is not sufficient on its own.
Include handover records in procurement
Request a flow diagram, equipment and consumable list, operating instructions, maintenance forms and escalation contacts. The accompanying records are original project-management forms, not copied WHO templates. The school application page can help organise an enquiry; supply, training and on-site service require project-specific confirmation.
Background: WHO's second-edition water safety plan manual introduces risk management across the supply chain. AI-assisted management guidance; no Cambodian or Lao compliance conclusion is offered.