Fuel Measurement and Quality Control Procedures
📌 Initial shift procedures involve measuring initial water level and fuel stock in tanks using a dipstick coated with water paste and then oil paste.
💧 Water level is determined by color change on the dipstick after insertion; a similar process using oil paste determines the oil/fuel level.
📏 Measurements must be repeated until the variation is less than 3 mm, and the first reading is generally used.
🧮 If the measured fuel height falls between two values in the volume table, interpolation using a specific formula is required to calculate the volume.

Density and Quality Testing (Morning Sample)
🔬 In the morning, the supervisor takes a fuel sample and measures the observed density ($\text{density}_\text{obs}$) and observed temperature ($\text{temp}_\text{obs}$) using a hydrometer and thermometer after calibrating the measuring glass with water.
⚖️ The observed density and temperature are recorded in the daily quality log, and the standard density at $15^\circ\text{C}$ ($\text{density}_{15^\circ\text{C}}$) is determined using ASTM Table 54.
✅ Unloading is permitted if the difference between the depot/delivery $\text{density}_{15^\circ\text{C}}$ and the received $\text{density}_{15^\circ\text{C}}$ is less than 0.005.
📝 Sample testing is conducted for every compartment of the tanker truck.

Daily Dispenser Volume Test
🧪 Before unloading, the supervisor performs a manual volume test on the dispenser using a 20-liter measuring vessel across a minimum of 50% of the fuel nozzles at the station.
📉 If the measured volume test result exceeds the tolerance of 0.3% or 60 ml per 20 liters, the dispenser must be recalibrated immediately by the local Metrology department.
🔄 Recalibration is repeated using the reset button method on the dispenser if necessary.

Fuel Unloading from Tanker Truck
🚗 The tanker truck is directed to the unloading area, positioned to allow for emergency exit from the gas station premises.
📑 Supervisors verify documents, including the delivery order (PNBP), Metrology certificate, and check the tanker seals against the delivery note.
🔢 Arrival time, tanker license plate number, and PNBP number are logged in the daily quality log and fuel inventory record.
💧 Before unloading, the supervisor verifies water level and oil/fuel level in the tanker compartments using water paste and oil paste dipsticks.

Key Points & Insights
➡️ Accuracy in measurement is paramount, requiring repeated readings until variation is below 3 mm for initial tank readings.
➡️ Dispenser calibration must be addressed urgently if the error exceeds 0.3% (60 ml per 20L), ensuring legal compliance.
➡️ Fuel unloading proceeds only if the density check shows a deviation of less than 0.005 between the expected and received $\text{density}_{15^\circ\text{C}}$.
🔒 After testing, fuel samples must be poured into sample cans, sealed with tape following the arrow direction on the signed tank ticket.

📸 Video summarized with SummaryTube.com on Jan 08, 2026, 11:40 UTC