Measurement Equipment Out of Service or Repair. If the measurement equipment is found to be measuring inaccurately and the amount of Gas delivered cannot be ascertained or computed from the reading, then the Gas delivered shall be estimated and agreed upon by the Parties based on the best data available, using the first available of the following:
Measurement Equipment Out of Service or Repair. If Gatherer’s measurement equipment is found to be measuring inaccurately and the amount of gas delivered cannot be ascertained or computed from the reading, then the gas delivered during the Accounting Period shall be estimated and agreed upon by the parties based on the best data available, using the first available of (i) the registration of any check meter, including Shipper’s Check Meters, or meters if installed and accurately registering; or, (ii) correction of the errors, if the percentage of error is ascertainable by meter calibration, test or mathematical calculation; or (iii) estimation based on comparison of the quantity of deliveries with deliveries during preceding periods under similar conditions when the meter was registering accurately.