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Batchelor water supply development study 1985.



Batchelor water supply development study 1985.


Keith Lane & Associated Pty Ltd


E-Publications; E-Books; PublicationNT; Report ; 68/1985




Made available via the Publications (Legal Deposit) Act 2004 (NT).





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Dept. of Mines and Energy

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Report ; 68/1985

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Technical Report WRD85068 Viewed at 15:07:30 on 29/07/2010 Page 30 of 58. I I I I I I I I I I I I I I I I I I I I 10.4 Chlorination : There is, at present, an existing unserviceable chlorinator connected to the rising mains from the Town Centre bore compound. This is of no further use and should be removed, as these bores only produce a small percentage of the Town's total water supply. Although bacteria counts at a number of points in the system have generally been below the permissible limit, it is recommended that provison for chlorination be made at the inlets to both tanks. With the increased storage capacity, and hence storage time, the supply should be chlorinated and bacteria counts made on a fortnightly basis. The AHRC/NHMRC recommends testing on at-least-a monthly basis. Chlorination would be achieved via gas rather than powder. Gas is more efficient and there should not be any safety/storage problems with the chlorinator being located at the tank site. 10.5 Fluoridation: Fluoridation of the supply is not essential. The AWRC/NHMRC recommends control limits of 0.6 - 0.8 mg/L for areas such as Batchelor which have an annual average of maximum daily air temperature of 26.3 - 32.6 degrees (Centigrade). Current tests show the fluoride levels to be in the order of 0.2 to 1.0 mg/L and fluoridation of the supply should not be necessary. The fluoride levels in the supply should be monitored on a fortnightly basis, and if fluoride levels drop well below the acceptable, a future decision may be made on fluoridation of the supply. 26

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