Moisture is able to seep deep into these crevices. It also may seep more slowly through the ground, forming seepage springs. Groundwater contamination happens when other fluids seep into the aquifer and mix with existing groundwater. Chemosynthetic communities thrive where cold fluids seep out of the forearc. Landfill gases can seep out of the landfill and into the surrounding air and soil. Deep sea brine pools often coincide with cold seep activity. Water will therefore seep out of the capillary into the interstitial fluid. Air and moisture seep out of the curds over time, altering their acidity level. The moisture used to seep through one wall. This allows more water to seep into the ground where its flow is slowed. Vestimentiferans live in vent and seep habitats. Another environmental problem is the potential for methane to seep into the water. These areas around the Barents Sea still seep methane today. If it runs down the walls, it may seep into the mortar or through panels. When injected, they seep into cancer tumors.