Daily ATG report and variance

Entering the closing reading, and understanding where the missing gallons went.

Fuel Operations → ATG Report is Daily ATG Report Import: enter your tank gauge’s closing figures and PRODUCT_NAME works out the variance, separates out the part that is only temperature, and flags what is left.

Enter a reading

1. Choose how to get it in

   Type it, paste the ATG report text, upload the report file, or use Scan ATG inventory report to read a printout.

2. Enter the closing figures

   Opening and closing gross and net gallons, sales gallons, deliveries, closing temperature and water level.

3. Submit

   The reconciliation is calculated immediately.

Do this daily. Variance only means something over a run of days — a single day is noise.

How the variance is read

The arithmetic is: opening + deliveries − sales = expected, compared against what the tank actually holds. The difference is then broken into causes:

Cause	What it is
Temperature shrinkage or expansion	The fuel got colder or warmer. Not a loss
Dispenser meter drift	The pump is measuring slightly off
Short delivery	You were billed for more than arrived
Evaporation / breathing loss	Normal, small
Unexplained	What is left after all of the above

Unexplained variance is the number to watch. It is the theft or leak indicator, and it is the reason the other causes are separated out at all — a raw variance figure hides a real problem inside normal thermal movement.

You record the suspected cause on each reconciliation, including THEFT_UNAUTHORIZED_DISPENSE and UNDERGROUND_TANK_LEAK.

The EPA log

Fuel Operations → EPA Log shows each day’s Date, Tank, Book Inventory, ATG Physical, Total Variance, Thermal, Unexplained, Cause and EPA status.

The monthly compliance test is applied for you: the variance must be within 1% of throughput plus 130 gallons. Each period is flagged compliant or not.

This log is your compliance record. Gaps in it are gaps in your evidence, so enter readings every day — including days nothing was delivered.

A persistent unexplained variance in one direction is worth acting on quickly. Repeated water readings, or a steady loss that survives the thermal correction, are exactly what this page exists to surface.