Toxic Threat Zone Time: December 4, 2019 ALOHA® 5.4.7 1658 hours ST (using computer's clock) Chemical Name: AMMONIA Wind: 5 meters/second from N at 3 meters THREAT ZONE: Model Run: Gaussian Red : 106 meters --- (300 ppm = IDLH) Yellow: 404 meters --- (25 ppm) meters 150 50 wind 0 50 150 0 100 200 300 400 500 meters greater than 300 ppm (IDLH) greater than 25 ppm wind direction confidence lines Text Summary ALOHA® 5.4.7 SITE DATA: Location: AMOZOC, MEXICO Building Air Exchanges Per Hour: 1.05 (unsheltered single storied) Time: December 4, 2019 1658 hours ST (using computer's clock) CHEMICAL DATA: Chemical Name: AMMONIA CAS Number: 7664-41-7 Molecular Weight: 17.03 g/mol AEGL-1 (60 min): 30 ppm AEGL-2 (60 min): 160 ppm AEGL-3 (60 min): 1100 ppm IDLH: 300 ppm LEL: 150000 ppm UEL: 280000 ppm Ambient Boiling Point: -38.8° C Vapor Pressure at Ambient Temperature: greater than 1 atm Ambient Saturation Concentration: 1,000,000 ppm or 100.0% ATMOSPHERIC DATA: (MANUAL INPUT OF DATA) Wind: 5 meters/second from N at 3 meters Ground Roughness: open country Cloud Cover: 5 tenths Air Temperature: 23° C Stability Class: D No Inversion Height Relative Humidity: 50% SOURCE STRENGTH: Direct Source: 10 kilograms Source Height: 1 meters Release Duration: 1 minute Release Rate: 167 grams/sec Total Amount Released: 10.00 kilograms Note: This chemical may flash boil and/or result in two phase flow. Use both dispersion modules to investigate its potential behavior. THREAT ZONE: Model Run: Gaussian Red : 106 meters --- (300 ppm = IDLH) Yellow: 404 meters --- (25 ppm)