I've been checking garbage the entire time. My observations are that they've added a bunch of building materials to the garbage loot and removed other stuff so it seems like its changed to me. I'm not big on diving into xml files for the loot lists so maybe someone can do a little confirming?
Ask and you shall received. Here are all the lootgroups with acid in them (trash only) - I kept all of the items so you can see what they are competing with
<lootgroup name="groupCraftingUncommon" count="1">
<item name="resourceSewingKit" count ="1,2"/>
<item name="resourceGunPowder" count ="1,10"/>
<item name="resourceDuctTape" count ="1,2"/>
<item name="resourceOil" count ="1,5"/>
<item name="resourceSpring" count ="1,2"/>
<item name="resourceHeadlight" count ="1,2"/>
<item name="resourceElectricParts" count ="1,2"/>
<item name="resourceMechanicalParts" count ="1,2"/>
<item name="resourceAcid" count ="1" loot_prob_template="low"/>
</lootgroup>
<lootgroup name="groupJunk02" count="1">
<item group="groupScrapUncommon" loot_prob_template="med"/>
<item group="groupCraftingUncommon" loot_prob_template="med"/>
<item group="groupBuildingUncommon" loot_prob_template="med"/>
<item group="groupAmmoResourcesSmall" loot_prob_template="low"/>
<item name="resourceFeather" count="1,5" loot_prob_template="low"/>
</lootgroup>
lootgroup name="groupJunk" count="all">
<item group="groupJunk01" count="1"/>
<item group="groupJunk02" loot_prob_template="low" force_prob="true"/>
<item group="groupJunk03" loot_prob_template="veryLow" force_prob="true"/>
</lootgroup>
Some containers only have groupJunk, others have additional groups besides groupJunk
Additional information
"low" probability - prob=0.2
"med" probability - prob=0.5