Mr. Errol P. Lawrence is a Senior Hydrogeologist with Engineering Analytics. He is licensed as a professional geologist in Texas and Wyoming. His education includes a Bachelor of Science in Geology from Northern Arizona University, and a Master of Science in Engineering Geology from the Colorado School of Mines. Mr. Lawrence has nearly 50 years of experience with the successful application of geology, hydrogeology and environmental science to mineral resource development and groundwater characterization and remediation.

His focus over the past twenty-five years has been on the development and application of numerical and analytical groundwater models to address environmental and hydrologic issues related to mine permitting, resource recovery optimization, and groundwater restoration and monitoring, with an emphasis on the uranium mining industry.

Mr. Lawrence has extensive experience in presenting modeling results to state, federal and foreign regulatory agencies including the US Environmental Protection Agency, the U.S. Nuclear Regulatory Commission, Colorado Department of Public Health and the Environment, Wyoming Department of Environmental Quality, South Dakota Department of Environment and Natural Resources, the Orange County Water Board (California) and the South Africa Department of Water Affairs. His experience includes the characterization and simulation of groundwater systems and contaminant fate and transport in a wide variety of geologic systems.

Projects include the development of groundwater compliance programs for mining and milling facilities, preparation of land-ban exemption petition demonstrations, simulation studies to optimize in-situ recovery techniques, development of numerical models in support of Alternate Concentration Limit applications, and the design, review and assessment of groundwater remediation programs. His experience includes assessment of uranium in-situ recovery in the United States, Canada, Turkey, Kazakhstan and Paraguay.