Additional followup on this incident(s) in southern Indiana where occupants of dozens of homes were exposed to high levels of CO in December
“The IURC said it found the gas company, ‘Failed to properly operate its propane peak shaving plant located in the Clarksville Operating Service Area, inadequately heating its propane, resulting in too rich of a mixture being injected into their distribution system. As a result, it failed to meet NFPA 59 Section 9.4.2 (2) which requires redundant controls to prevent the introduction of petroleum vapor and liquids into gas distribution lines in quantities that could cause improper combustion in consumer appliances. These controls were not properly in place and resulted in this significant event.’”
State finds CenterPoint violated four procedures in Christmas Eve carbon monoxide event | Clark County | newsandtribune.com