Sand cleaning and disposal system and method

A system for sand cleaning, comprising:

• a cleaning unit including:
• a chamber having a first inlet to receive oil-impregnated sand, a second inlet to receive a separation compound that facilitates a separation process of oil from the oil-impregnated sand, a third inlet to receive inflowing water that lifts the separated oil, a first outlet to discharge the separated oil from the chamber, a second outlet to remove a separated liquid resulting from the separation process, and an aperture at a base of the chamber to discharge separated sand resulting from the separation process;
• an impeller, located adjacent to the base of the chamber, to be rotated to mix the separation compound with the oil-impregnated sand;
• and
• an oil trap, located inside the chamber and including the first outlet where the separated oil is discharged,
• wherein the oil trap includes a plate in a shape of a frusto-conical weir forming a base of the oil trap, and the oil trap is arranged to trap the separated oil entering an opening at a top of the frusto-conical weir and prevent the separated oil from returning to the chamber;
• a first filter connected to the first outlet;
• and
• a second filter connected to the second outlet.