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New Zealand Medical Services in Middle East and Italy

Sumps

Sumps

The hard, stony, impermeable nature of the ground made it very difficult to carry out efficient drainage and ordinary pits proved quite inefficient. The sullage water had eventually to be piped through cement pipes from the cookhouses and washing stands to the perimeter of the camp, where large evaporating pans, sixty feet square, in sets of four, were constructed. Two pans were flooded with water to a depth of six inches after it had passed through large grease traps. Evaporation was complete in twenty-four hours, when the other two pans were used. The dried deposit was scraped out and sent to the incinerator. Later, the pans were used to grow eucalyptus trees and crops of cabbages, tomatoes, maize, etc., and the little grease passing through the large grease trap was dealt with by digging in frequently to prevent fly breeding. The grease traps were cleaned out every week, the layer of surface grease being removed daily.