These toxins can leach down through the soil into groundwater, polluting local drinking water supplies. Concentrations of arsenic are high mainly in geothermal waters that leach continental rocks. Once there, chemicals could leach into basements and evaporate into household air. Unless carefully managed, these waste products can leach heavy metals into groundwater or nearby estuaries. Many fear that as the trees decay, radioactive contaminants will leach into the ground water. The soil can be poor because high rainfall tends to leach out soluble nutrients. Lead from the pipes can leach into the water, especially if certain contaminants are present. Those toxins do not leach out when the lobster is cooked in boiling water. Traces of these compounds can leach out of the product. As such, it can leach into the plastic bags and tubing used for intravenous infusions. Additional engineering was done by Tim Weidner, Greg Hunt, Gary Leach and Austin Deptula. The work was drawn primarily by Garry Leach and Alan Davis. In 1997 they lost the final to Rick Leach and Jonathan Stark. In 1997, they lost the final to Rick Leach and Jonathan Stark. King John was played by Phil Leach.