Yet in initial findings released Wednesday, federal investigators said the public utility company did not fully isolate gas flow to the facility until an hour and a half after the catastrophic blast. | EARLIER: At least 2 dead as explosion, collapse and fire trigger MCI at Pa. nursing homeThe technician called for backup to assist with the repair, and a meter services technician arrived about 1:20 p.m. The initial findings do not fault or exonerate any parties in the blast, and NTSB officials said the investigation remains ongoing. Police and firefighters helped others escape from the wreckage while contending with a second blast and fire that ignited after the initial explosion. Under the facility’s previous operator, the Cincinnati -based CommuniCare Health Services, the nursing home was cited repeatedly for substandard care and facility management.