 Waste Management has 48 monitoring wells in the surrounding and impacted areas as of December 2012.The California Department of Toxic Substances Control (DTSC) ordered the facility to clean up spills of PCBs around the storage building, and as of February 2012, DTSC reported that the soil cleanup and removal was the final step in protecting human health and the environment as there was no longer a threat.Under the direction of the Kings County Planning Agency, in March 2008 CH2M Hill, an independent engineering and consulting firm, prepared an impact report aimed to identify and evaluate potentially significant adverse environmental impacts associated with the proposed expansion of the Kettleman Hills Facility.