Gas chart auditing can be one of the more interesting and rewarding segments of chart processing. While performing a valuable service for the customer or person requesting the audit, it can give the auditor a chance to use his or her chart expertise that could become stagnate with only routine chart processing. The chart auditor becomes part accountant, part detective, and part mathematician. The purpose of the chart audit is normally to insure that the volumes have been reported as accurately and objectively as possible. Production companies and operators have a responsibility to lease owners, state agencies, and themselves to report volumes that are truly representative of the amount of gas that passed a particular point