The green blood is acidic to touch. If the traveller isn’t wearing a vacc suit then they must make an END 8+ check or take 1D4 damage for every 1.5 meters they walk through. If the traveller untakes a Dex 6+ check they can avoid touching the green blood on the ground. If it is in the air, then they must pass a Dex 10+ check. The brown sludge is only toxic to swallow. If it gets inside the traveller, whether through eyes, mouth, ears, or otherwise the Traveller must pass an End 6+ check or risk being infected. The infection will take 1D8 Weeks to progress before the traveller slowly becomes a skag.