Survey Equipment Service

CenterPoint Energy is a domestic energy delivery company that engages in electricity transmission and distribution, natural gas distribution and sales, and interstate pipeline and gathering operations. The company provides natural gas service to more than 2 million customers and both electricity and gas service to a combined customer base of more than 4 million. In addition to providing utilities for the Houston metropolitan area, the company serves customers located throughout the states of Arkansas, Louisiana, Minnesota, Mississippi, Oklahoma and Texas. The company s pipelines division owns and operates two interstate pipelines, gathers natural gas, provides maintenance and technical services to third-party clients and installs the company s remote wellhead monitoring and measuring product, ServiceStar. David M. McClanahan has been the chief executive officer of CenterPoint Energy for more than four years. He has been with the utility company for over 34 years. McClanahan earned a BS degree from the University of Texas-El Paso, and a MBA from the University of Houston. An employer of more than 9,000 people, CenterPoint Energy is headquartered in Houston.

Shell Energy North America is a subsidiary of the Shell Oil Company, a leading oil and gas producer in the deep water Gulf of Mexico, a recognized pioneer in oil and gas exploration and production technology and one of America s leading oil and natural gas producers, gasoline and natural gas marketers and petrochemical manufacturers. The company operates in 50 states and employs more than 22,000 people delivering energy in technically innovative ways. As one of the largest providers of transport fuels, the company is committed to helping drivers use less energy and reduce emissions with advanced fuels and lubricants, leading the search for better biofuels and promoting government policies to reduce CO2 emissions from transport. It is an affiliate of the Shell Group, a worldwide group of energy and petrochemical companies that operate in more than 140 countries and territories. The Shell Group was started from an alliance made in 1907 between Royal Dutch Petroleum Company and The Shell Transport and Trading Company. Shell Energy North America maintains a location in Houston.