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Officials stress detectors and alarm thresholds for ammonia response
Summary
Presenter Marcus Ettis urged use of personal and fixed detectors and automatic alarms, citing example activation thresholds (150 ppm) and warning that lack of visible vapor does not equal safety.
At the Jerome County Local Emergency Planning Committee meeting, Marcus Ettis emphasized the central role of detectors and automatic alarms in early ammonia detection. He said visual absence of a vapor cloud is not proof of safety and encouraged facility operators to rely on calibrated detectors and meters.
Ettis cited example alarm thresholds and practical guidance: detectors and ventilation systems should be set to activate at specified ppm thresholds (he cited 150 ppm as an example) and personal detectors supplement fixed systems. He also noted detection by smell occurs around 2 ppm but stressed meters give objective, actionable readings.
