A $30 million plan to provide standardized breathing equipment for every fire department in Los Angeles County has been suspended after a lawsuit alleged the contract process was mishandled and firefighters complained about the quality of the equipment. Arcadia-based Allstar Fire Equipment is suing the city and county of Los Angeles, contending the contract process was improperly handled in a manner that ignored firefighter input and unfairly favored the winning bidder, L.N. Curtis and sons.