Once the section starts, turn left and follow the path past the vehicle wreckage to reach a garage. You should see a COG tag skull on the wall. Go around the wreck to find corpses and the COG tag.
Continue forth until you reach a closed space downstairs. Wait a bit and lambent humanoid mutants will attack. Keep distance and evade as they're deadly at close range as wretches. Continue inside the buildings and anticipate similar attacks along the corridor. Keep clearing the corridors until you reach the next door. Cut the chains to proceed.
Continue upstairs and kick the next door open. Head upstairs to reach the makeshift lift to reach the rig to end this section.