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Presentation uses 10,000‑pound scenario to illustrate off‑site impacts of an ammonia release
Summary
Presenter Marcus Ettis described worst-case modeling for a 10,000‑pound release over 10 minutes, producing an example toxic endpoint radius of about 1.76 miles and urged facilities to evaluate off-site populations, highways and environmental receptors.
Marcus Ettis used a typical planning scenario — a 10,000‑pound release over 10 minutes — to illustrate potential off‑site consequences of an ammonia release, citing an example modeled toxic endpoint radius of roughly 1.76 miles. He said facilities must evaluate off‑site impacts on nearby populations, highways and environmental receptors when preparing emergency plans.
Ettis summarized facility inventory ranges in the region, noting small plants around 5,000 pounds and large plants exceeding 60,000 pounds; he also cited a regional estimate of about 2 million pounds of anhydrous ammonia across facilities from Ontario to Burley. He urged that these inventories inform worst-case scenario planning and public-notification strategies.
