> ## Documentation Index
> Fetch the complete documentation index at: https://sims-bae272dd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 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.

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

> [!NOTE]
>
> 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.


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