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>CSN Standards>75 WATER MANAGEMENT
7510
7552 Water supply. Water treatment
7553 Water supply. Treatment of pumping water
7554 Water supply. Water piping
7556 Water supply. Structures of water mains
7557 Products used for treatment of water
7558 Chemical products for water treatment
7564 Sewerage. Sewage purification
7570 Water quality. Sampling
7573 Water quality. Physical analysis of water
7574 Water quality. Chemical analysis of water
7575 Water quality. Chemical analysis of water
7576 Water quality. Radiological analysis of water
7577 Water quality. Biological analysis of water
7578 Water quality. Microbiological analysis of water
7580 Water quality. Analysis of sludge