CHERRY VALLEY (CNS) - U.S. Forest Service officials could start releasing firefighters from the Apple Fire in the San Bernardino National Forest, nine days since it was started by a diesel vehicle malfunction. The fire has consumed 32,412 acres since July 31 and was 40% contained as of Sunday morning. Saturday's fire activity was described as minimal, with the flames held within the established perimeter although there was increased activity inside the perimeter as sparks caught unburned islands of vegetation, officials said. Mop-up operations were underway in the Millard Canyon area. "Mop-up consists of looking for areas of flame and heat that are near the perimeter of the fire and making sure that they are extinguished; similar to stirring your campfire to make sure it is cold,'