Anadarko Petroleum Corporation
Andre, Morris & Buttery

Barnett Cox & Associates
California Independent Petroleum Association (CIPA)
E&B Natural Resources Management Corporation

Kenai Drilling Limited
Plains Exploration & Production Company (PXP)
Western States Petroleum Corporation (WSPA)

API
B.E. Conway Energy
ConocoPhillips
GBP&B Tax and Business Services, Inc.
Rockin CJ Transport
W R Garretson Engineering

Core Laboratories
Diversified Technology Services Inc.
Halliburton
Layne Christensen Company
Ramsgate Engineering, Inc.
Southern Sierra Gen. Eng., Inc.
WSPA Coastal Associates