A deep pit facility was used to test hydrogen sulfide levels during agitation. The building, located near Waukon, Iowa, was comprised of two 500-head finishing rooms with separate pits.

Hydrogen sulfide is considered the most dangerous gas among the by-products of manure decomposition. It is colorless and has a very pungent odor, like rotten eggs. Concentrations of several hundred-ppm are toxic to humans and animals. Levels of 50-ppm can cause dizziness and headaches. OSHA standards state that the safe eight-hour exposure to hydrogen sulfide for humans should not exceed 10-ppm.

Sixty days prior to testing one room was treated with Pit Remedy Activated Carbon and the second pit was left untreated. Pits were agitated and emptied in mid-November. In the untreated pit hydrogen sulfide reached a high of 203-ppm and averaged 93-ppm during agitation. The highest reading in the Pit Remedy pit was 10-ppm and the average reading was 2.7-ppm – a 97% difference!

"Your product worked very well during pit agitation to minimize the hydrogen sulfide level . . . the average reading of the Pit Remedy pit was only 2.9% of the reading from the untreated pit."

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Dr. Dan Meyer ISU Field Specialist

"Your product worked very well during pit agitation to minimize the hydrogen sulfide level... the average reading of the Pit Remedy pit was only 2.9% of the reading from the untreated pit."