As Veronica sinks to the bottom, she thinks back to the experimental secret alterations she made for a worst case scenario. Like this one.
With extensive research, she was able to significantly delay the transformative effects of the liquid if applied to specific people determined by her, this of course included herself. However, while it means she can hide for a time inside, the problem with breathing isn't solved, and eventually she will become a monstrous thing. The only option for survival and sanity is to somehow get back to her personal lab where a serum for removing the liquid's effects is hidden.
Thankfully their version of the liquid is much less viscous than its original form, allowing Veronica to sink to the bottom before running out of breath. Down there, she opens a hatch to one of the intake pipes, specifically one that she requested to be added as redundancy and is not actually used most of the time.
Swimming through the pipe leads to a pool of plain water where Veronica comes out from. Completely soaked and breathing heavily, she lies down to rest and regather herself. "Have... have to hurry. Only a few hours before I lose myself".
With enough rest, Veronica finally gets up and looks around. The room is empty as the water is only replaced every 2 weeks here. The alarm for her capture has been removed but she still has to avoid anyone recognizing her. Looking around the room, cleaning uniforms and tools are stored in a group of lockers, so she decides to change into them, however...
While taking off her wet clothes, Veronica realizes everything is too tight, even her loose lab coat seems to barely fit her, her bra and shirt have a hard time containing her boobs, and a quick comparison to the lockers confirms the problem. "Shit! I'm growing taller" Rapidly swapping clothes to the biggest set she finds, veronica doesn't even put on shoes as she needs as much mobility as possible "The gigantification effect is rare but has one of the fastest onsets, damnit! With how much my body absorbed I'm going to grow too large to fit in this building even before the other mutations start. I have to get to the lab!"
With her large disguise(for now) consisting of too big shirt, slightly bigger pants and a biohazard cleanup overcoat and mask, while carrying some cleaning tools, Veronica walks as quickly as possible towards the research sector while trying to avoid security. On the way, her body continues to grow slowly, but the vast amount of liquid has messed with Veronica's calculations more than she planned for.