Water Quality Awareness 101 13 | P a g e 10. MECHANICAL REPAIRS, ALTERATIONS AND MODIFICATIONS All assets require maintenance and repairs at some stage. This can range from a simple wire brush or paint, to complex repairs involving welding, cutting, grinding etc. No matter what the repair or maintenance task, if it is performed around drinking water, or water destined to become drinking water, the interaction of the work and any potential impacts it could have on water quality must be identified and carefully managed. 10.1.1 Issues  Petrol, oils and greases from machinery that is used during construction or maintenance activities on or around drinking water systems  Paints and coatings that are used in a water treatment plant, that are not compliant with the requirements of AS4020. Also consideration needs to be taken of the paint used in and around water storages and the distribution network  Sealants used during construction, repair and maintenance that are not compliant with the requirements of AS4020  Lubricants for fittings used in drinking water systems that are not compliant with the requirements of AS4020  Water system parts, such as valves and pipework, that are not compliant with the requirements of AS4020 for contact with drinking water  Materials used in the of construction of drinking water systems that are not compliant with the requirements of AS4020  Debris from maintenance activities entering the water system Grease gun being used directly over a treated water storage - note there is no provision to prevent any tools or materials entering the water