A fire ripped through a plot of land in Bolinas late Saturday night, destroying two structures and injuring one person. The blaze that erupted at around 11 p.m. between Hawthorne and Grove Roads was fueled by the explosion of a 20-gallon propane tank that sent a fireball into the air. The cause of the fire is unknown. Flames spread to vegetation and home on the property, where Nik Bertulis was sleeping. He awoke and tried…