The Texas Chain Saw Massacre

The description for the achievement is a little misleading because it implies you can trap Unlock Boxes and Bone Scraps as part of your basekit power. In reality, you're only able to trap those things with a maxed out power. You can only trap health items, the fuses and the valves in this regard.
Make sure to look around the map for these stations that have a bowl on them, you can use them to refill her power.

You must play as Sissy for this one and do the following:

Poison 15 items, such as fuses, valves, health items, lockboxes and bone piles. Also can poison main objectives like Generator and the Battery with a perk but you won’t need it.

Tricky part, she only starts with 3 poisons. You can pick up more on the bowls around the map, use up on the D pad to locate them if you’re having issues finding them. Realistically if you only go for that this should only take 2-3 matches.

You can easily get this just by playing Sissy naturally... But if you want to speed up the process.

Use her unique perk called "Efficient Herbalist" - Poisoning an object has a 25% chance (Level 1)/50% chance (Level 2)/75% chance (Level 3) to not consume any powder.
The perk is at the top right of Sissies skill tree.

You could probably get the achievement in a single game with some luck if that's all you're looking for.