What daily covering practice is recommended for mass garbage trenches?

• A. Leave open
• B. Rinse with water
• C. Replace with sand
• D. Cover with 6 inches of dirt each day

Answer: (D)

Covering mass garbage trenches daily with soil serves to create a barrier that controls odors, deters flies, and prevents access by rodents and other scavengers. Placing about six inches of dirt each day is effective because it rapidly encases the new waste, reduces volatile emissions, and provides a stable surface that minimizes wind-blown litter and pest attraction. This practice helps maintain site hygiene and lowers the risk of vector-borne disease in the area.

Leaving trenches open would leave waste exposed, increasing odors and pest problems. Rinsing with water doesn't address pest control or odor suppression and can create messy runoff. Replacing with sand is not as effective at sealing in odors or preventing access by pests, and it doesn't provide the same protective barrier as soil. Hence, the daily standard of covering with six inches of dirt is the best practice.