Q353. If a LFG flow meter malfunctions and is out for service for a week or two, are we required to have a backup meter or can we use the estimating missing data provisions of 98.345 to estimate the gas volumes during the period that the meter was not in place?

A353. A back-up meter is not required, the missing data provisions of 40 CFR 98.345 must be used when meters malfunction or are otherwise out of service.