LCR sampling protocols require water customers to collect fifth liter tap samples. Water collected in the fifth liter samples represents the water that has been sitting in a water service line outside of the house, whereas the first liter represents the water in contact with the faucet and interior plumbing.
1st and 5th liter sampling for lead and copper rule compliance
Water collected in the fifth liter samples represents the water that has been sitting in a water service line outside of the house, whereas the first liter represents the water in contact with the faucet and interior plumbing. This video reviews the updated sampling process.