Principles of sanitation applicable to the construction of new vessels.

Date:
[1949]
Catalogue details

Licence: Public Domain Mark

Credit: Principles of sanitation applicable to the construction of new vessels. Source: Wellcome Collection.

    24/122 (page 10)
    Table II. Amount of Chlorine Compound to Disinfect a Water System with 50 p.p.m. ¢}) Chlorine Amount of chlorine compound 25% chloride | 70% H.T.H., or Liquid sodium hypochlorite cluding tanks) ; : ‘ of lime - equivalent - gals. tons lbs. lbs. 5% solution-gals. | 10% solution-gals. 1,000 4 gyi 0.5 2,000 8 2 1.0 5,000 21 5 2.5 10, 000 42 10 ape. mate (3) (a) (b) (c) (4) (5) (6) ly 6 ounces. One pound equals 16 ounces. Prepare the chlorine solution: Chloride of lime. Place the proper amount of chlorine com- pound in a clean bucket containing no water; then add a small amount of water and mix to a thick paste. Dilute the paste by adding water gradually and stirring constantly un- til a gallon or two of solution is obtained. Warm water is better than cold for this purpose. Allow the solution to stand for 30 minutes so that the undissolved particles may settle to the bottom. Pour off the clear liquid (which is the chlorine solution) and, if necessary, filter it through muslin or cheesecloth. H.T.H.,;, Perchloron, Pittchlor, or equivalent. Place the proper amount in a bucket, fill within a few inches of the top, and stir until the powder is dissolved. (Disregard slight turbidity, if any.) Liquid sodium hypochlorite. These solutions require no preparations. Introduce the chlorine solution into the potable water storage tanks. Immediately after introducing the chlorine solution into the tanks, they should be completely filled with potable water. Sufficient mixing will] usually be obtained by the whirling action of the incoming water. Open the taps and outlets on the distribution system nearest the storage tanks and allow them to flow until chlorinated water appears. After opening the nearest taps, the process should be continued outward from the tanks until all taps and outlets have been flushed with chlorinated water. Care should