DVD Content Summary - LACT UNIT PRINCIPLES: Covers the basics of oil revenue and provides an overview of the Lease Automatic Custody Transfer unit. Details the flow of oil through the unit and describes the function of major components. Shows meter proving and inspections necessary to maintain proper operation. LACT UNIT WITNESSING: Defines roles and responsibilites of LACT Unit Witnessing participants, including preparation steps to be completed by the seller's witness. Sampling procedure taught for determining API gravity and sediment & water content. Shows steps involved in a meter proving, detailing the requirements for the seller's witness in the meter proving process. LACT UNIT OPERATION: Examines design variations among typical LACT units. Teaches daily operation procedures, routine inspections and troubleshooting techniques.