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A refined system likely would assign each surface water both human and aquatic life uses to fully reflect its unique characteristics , appropriate uses , and the measures necessary to protect them . Additional groundwater monitoring well installations , as well as a sampling program for both groundwater and surface waters both on and off-site from the EPT facility , will be part of this work plan . Traditionally , separate tools were used to investigate and monitor surface water versus ground water . Thus , data representing concentrations of contaminants in the surface water either on-site or off-site were used in this human health risk assessment . When copper and copper compounds are released into water , the copper that dissolves can be carried in surface waters either in the form of copper compounds or as free copper or , more likely , copper bound to particles suspended in the water . Mobilized Al can be transported to adjacent surface waters either in storm runoff or in subsurface flow . This water re-enters surface waters either directly or through surface runoff .