The effectiveness of a manure scraper system for reducing the risk of chicken’s exposure to hydrogen sulfide (H2S) is carried out by comparing the gas levels in the manure. Scrapers can handle solid or semisolid wastes, the high moisture content of swine manure, along with the additional moisture from waterers, washing operations, and other sources, usually dictates that scraped manure waste from the poultry buildings can be handled as a liquid. The liquid is normally stored in outdoor earthen storages or in above-ground or underground tanks. To minimize storage and transport requirements, additional dilution water is usually not added to the scraped manure