Foam-60 arrived o/s reporting a very large junk yard fire and requested the box, with all hands to go in service with heaviest water lines. B/C-1 requested snorkel-5 as a special call on F-60's report. Deputy-1 arrived and reported a pile of cars approx 3 to 4 stories high 300 x 175. He requested the second alarm. All hands were in svc with master streams.