Campgrounds, RV parks, and Marinas are typically found in remote locations without access to sewage systems. Therefore, septic systems are typically used to dispose of wastewater and must be properly sited and maintained to prevent ground water contamination. If boat launches and fueling stations are on site, gasoline and diesel fuel from boats can contaminate surface water and ground water if spills occur. Other threats to source water include household hazardous waste from RVs and camp sites, pesticide or fertilizer application if there are any improved areas, and human and pet waste.