By Liz Kellar | Staff Writer A man suspected of operating a butane honey oil lab is facing multiple felony charges after an explosion lifted the roof off his Grass Valley apartment Monday night. Kyle Patche, 31, sustained “significant” but not life-threatening burns and remained Tuesday at a regional burn center, said Grass Valley Police Capt. Steve Johnson. Upon release, Patche will be charged with illegal manufacturing of a controlled substance, two counts of felony child endangerment causing injury, causing a fire that caused injury or death and causing a fire of an inhabited structure, Johnson said. A 12-year-old girl and a 9-year-old boy also were in the residence at the time of the explosion, Johnson said. The boy had relatively minor injuries and was treated and released at the scene, and the girl was transported to a Sacramento-area trauma center, treated and released later that night. Both children are in the care of Child Protective Services, he said.