4000 XP, Cash, Sticky Bomb Mod
Talk to Mother Helen after completing the Sacred Silence quest to begin this one. Follow the mini-map to the pump station. Once you get there, there will be lots of Punks with guns, so having a gun will be very helpful. Once you kill everyone, find and free Antonio. Follow Antonio to the control room, and collect your reward. Talk to him again to begin the Drop By Drop quest.
High Voltage Mod - It's in the pump station when you get to a room with posters of women on the wall, it's right beneath them on the table.