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                                              11997 Runyan Drive    Cincinnati, Ohio 45241     Phone:  (513) 563-2943     Fax:  (513) 769-0024                                                        

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COMPLIANCE ISSUES

USING AN AUTOMATIC TANK GAUGE FOR LEAK DETECTION

Owners/operators of underground fuel storage tanks are required to have certain records on file, demonstrating an on-going, active program of monitoring the tanks for potential leakage.   Over the last 10 – 15 years, most tank owners have installed an electronic tank level monitor in order to comply with this requirement – many of these sites, however, are not recording the proper information to fully comply with the regulation.

Daily:

There must be a daily log, reconciling the tank gauge readings against the meter readings from your fuel pumps.  The log can be fairly simple (an example is shown, below).  The idea behind this is that, in a given period, if your meter readings indicate that you have pumped 2,000 gallons, for example – the reconciliation report from the tank gauge should show that the tank contains 2,000 gallons less, during the same time period.   You must record the comparison of the two devices and any difference between the two figures (they will seldom match, exactly).  Obviously, you arrive at the meter reading figure by totaling all gallons pumped, of a particular product.  The figure from the tank gauge can be arrived at by running an inventory report at the same time as the pump readings, then subtracting from yesterday’s inventory report.  Some tank gauges have a Reconciliation Report available, which will do the math for you and give you a total gallons missing since the last Reconciliation Report was run.  Either method is acceptable, as long as you consistently use the same method.

Reconciliation should be done with every shift change (or whenever you would normally take pump readings).  If shift changes are not normally done with meter readings, then readings should be taken and reconciliation performed when the facility opens and closes each day.  In the case of 24 hour availability of fuel at a site with no specific shift changes and individually trained personnel (unsupervised fueling at a private commercial facility) reconciliation must be performed at least once in every 24 hour period that the facility is open.

example of a daily reconcilliation log

Monthly:

A monthly log must be kept showing the differences in each day's Reconciliation Report.  The overages and underages for each tank must be totaled and compared to the total monthly through-put for that tank.   The differences must be within 1% of total through-put (+/- 130 gallons).  An example is shown, below.

In addition, a monthly leak test must be run with your tank gauge system and the printed reports from these must be kept on file.   This is normally a standard function of the tank gauge system but, on some models, must be manually initiated each month.

If there are questions which are not addressed here, please don't hesitate to contact us, or your local Fire Department for additional information.

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