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.

    50/122 page 36
    sanitary water system is used, the line should be stenciled or painted orange. (See Subpart 3.1, p. 18) 10.3 PROTECTION OF FRESH DOMESTIC WATER INTAKES FROM VESSEL WASTES Vessels which operate on fresh water lakes and rivers should not con- taminate domestic water intakes by the discharge of sewage or contami- nated ballast water in the vicinity of such intakes or in restricted areas established by State law or municipal ordinance. When necessary to use toilets while the vessel is within such areas, the requirements for the particular area should be followed. When not otherwise speci- fied, means should beprovided to retain all the sewage in suitable tanks for subsequent discharge in unrestricted areas, or to retain the set- tleable solids and chlorinate the effluent before discharging it into the restricted area. When it is necessary to discharge ballast water which has been drawn from polluted areas at points near water intakes or in restricted areas, the ballast water should be chlorinated before being discharged. In both cases, chlorine should be applied by a commercial hypochlor- inator and the chlorinated sewage effluent or ballast water should be given a dosage of at least 15 p.p.m., with a contact period of at least 30 minutes before being discharged.
    digitised image 1
    digitised image 2
    digitised image 3