I have 40 years of experience, and specialize in the field of engineering with specific knowledge in the areas of petroleum environmental, groundwater geology and hydrology and civil. I have published on such topics as drilling completions of gas wells, directional density wellbore logging in gas wells and goundwater supply of San Felipe Springs. I have testified 47 times on topics such as petroleum engineering, production of oil and gas, environmental contamination by oil and gas, uranium mill waste and storm water flooding events.