cross connection with technical, black or grey water systems; poor temperature control or inadequate disinfection 4.9 Contamination Contamination of potable water or microorganism growth in the ST through distribution distribution system, in particular due to: system backflow poor design and construction of piping system components; existence of deadlegs in the distribution system; damaged pipes; chemical contamination through the use of the wrong distribution construction materials; contamination during maintenance or the repair of piping system; biofilm growth in pipe work and fittings contributing to contamination with Legionella, Pseudomonas aeruginosa, Mycobacterium spp. or amoebae; contamination due to stagnant water in infrequently used outlets or other part of the water system where water remains stagnant for more than days . Control measures 4.10 Control Suitable control measures should be identified for each potential ST measures hazardous event. source 4.11 Supplier water Where available and supplied to the ship any supplier water ST quality reports quality/safety reports should be checked for compliance with the Directive 98/83/EC requirements, before loading potable waterAnnex 4.12 Water quality basic water quality tests (pH, free , E. coli test) should be performed ST tests before bunkering . production (potable water 4.13 Filtration of Sea water should be filtered to remove particulate matter before it is ST sea water
cross connection with technical, black or grey water systems; poor temperature control or inadequate disinfection 4.9 Contamination through distribution system Contamination of potable water or microorganism growth in the distribution system, in particular due to: backflow poor design and construction of piping system components; existence of deadlegs in the distribution system; damaged pipes; chemical contamination through the use of the wrong distribution construction materials; contamination during maintenance or the repair of piping system; biofilm growth in pipe work and fittings contributing to contamination with Legionella, Pseudomonas aeruginosa, Mycobacterium spp. or amoebae; contamination due to stagnant water in infrequently used outlets or other part of the water system where water remains stagnant for more than days . ST Control measures 4.10 Control measures Suitable control measures should be identified for each potential hazardous event. ST source 4.11 Supplier water quality reports Where available and supplied to the ship any supplier water quality/safety reports should be checked for compliance with the Directive 98/83/EC requirements, before loading potable waterAnnex ST 4.12 Water quality tests basic water quality tests (pH, free , E. coli test) should be performed before bunkering . ST production (potable water 4.13 Filtration of sea water Sea water should be filtered to remove particulate matter before it is ST