The weight of scrap metal is determined using car weights. The weight of the received scrap metal is calculated as the difference between the loaded vehicle and its weight without load. Non-metallic impurities remaining after unloading are classified as garbage and are not counted in the weight of the received scrap metal. The non-degradable amount of non-metallic impurities that are not separated from scrap metal during unloading is classified as scrap metal contamination. Contamination is determined by the scrap collector during visual inspection. The set amount of contamination (in %) is deducted from the weight of the accepted scrap metal. The net accepted weight of scrap metal is the accepted weight from which the percentage of contamination is taken away.