Stalker: Clear Sky → Junkyard (Part 2)
Without further ado, we head towards Fang's PDA marker. This marker points to a basement next to the unfinished ruins where the diggers have settled.
Note: Be careful! Scar will lose absolutely all of his belongings in the basement. If you feel even a little sorry for him, dump your junk right in front of the basement entrance. You'll pick it up when you get out.
It turns out the basement is booby-trapped. It didn't kill him, but it left him severely concussed. Coming to his senses, Scar finds himself lying on the basement floor, and above him are two degenerates in bandit attire. It turns out they've been robbing curious stalkers who poke their noses into the basement for a while now.
The bandits, having robbed Scar as he recovers, flee. Now it's time to get up and look around. In the very corner of the basement are Fang's PDA and a "beginner's kit"—a Makarov-style scarecrow, ammunition, and some other junk.
The PDA mentions some kind of cache and Fang's involvement in the expedition to the center of the Zone. Lebedev contacts the station and reports that the cache's coordinates have already been deciphered. It's time to head to Agroprom.
Source: stopgame.ru
See also:
Solving problems using reaction equations.
Metro 2033: Outpost walkthrough
Titanium ingot. Terraria.