In August, tragedy struck rural Weld County when six workers at a dairy east of Keenesburg died from exposure to hydrogen sulfide gas.
On Aug. 20, Oscar Espinoza Leos, 17; Carlos Espinoza Prado, 29; Noe Montanez Casanas, 32; Jorge Sanchez Pena, 36; Ricardo Gomez Galvan, 40; and Alejandro Espinoza Cruz, 50, were found dead at Prospect Valley Dairy, 32063 Weld County Road 18.
Espinoza Cruz was the father of both Espinoza Prado and Espinoza Leos, an online student at Highland High School. The Espinozas also were related by marriage to Sanchez Pena, who lived at the dairy in employer-provided housing, according to Ana Schultz, a representative of Project Protect Food Systems Workers, a support network for food workers. Montanez Casanas also lived at the dairy, she said.
Initially, crews from Southeast Weld Fire Protection District responded to a confined space rescue. When first responders arrived, they noted the man may have been exposed to high levels of hydrogen sulfide, according to archived radio transmissions.
Following the tragedy, two agricultural safety experts told The Denver Post that in their decades of work, they had never seen six people die from hydrogen sulfide in the same exposure incident.
Hydrogen sulfide occurs naturally in crude petroleum and natural gas, but is also produced from decomposing manure. Low doses of exposure to the gas, also called H2S, can cause mild irritation to people’s eyes and respiratory system, and exposure to large amounts in a confined space can quickly become deadly.
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