Toxic Valley treasure maps

The Toxic Valley treasure maps are four maps They lead to buried mounds hidden throughout the Toxic Valley, all of which contain random valuable loot.

Locations
The notes can be found throughout Appalachia, as randomized, rare loot in containers or on the bodies of Boss creatures. The treasure maps lead to:
 * Map #01 leads to Becker Farm, next to the corner of an otherwise-destroyed building, by the water.
 * Map #02 leads to a mound behind the Clarksburg water tower.
 * Map #03 leads to the Pioneer Scout camp, near a ruined boat on Grafton Lake.
 * Map #04 leads to a cliff south of the Crater. As of Wastelanders, it can be easily accessed by heading straight from behind the "ROCK" stage with the musical instruments.

Bugs
Prior to patch 1.1.0.8, Toxic Valley treasure location #03 in the middle of Grafton Lake could not be accessed using Map #03 (despite being the correct location). However, Savage Divide treasure map #04 would unlock the treasure location if it was in the player character's inventory.