Concrete blocks

 is a bugged stash featured in S.T.A.L.K.E.R.: Lost Alpha. "How do you trick a greedy bandit? Find an open space where he can get stuck in a bog and be killed by scary ghosts and then place your goods there!"

- PDA description

Overview

 * Stashes in the Swamps seem to be bugged. The majority have a probability of 0.03 of being given, with a couple having a 0.1 probability. Most may be gleaned from Bandits, Loners or the Military with the higher probability ones limited to the first two factions.
 * For the coordinates to be given, the player also has to be present on the level.
 * With the exception of the nuisance helicopter, which never yields lootable bodies, there is no Military presence on the level, leaving just a trio of Bandits and the Loner occupants of the village ans possible sources for the coordinates. Neither are particularly fruitful or realistic.
 * There are no non-volatile corpse placements on the level either.