Partial Lead Pipe Replacement Model (IMAGE) Washington University in St. Louis Caption This diagram shows the new model at work: By taking into account a number of factors, including water-use patterns and water chemistry, engineers can predict where lead particles will dislodge and end up in the drinking-water supply during a partial lead service line (LSL) replacement. Credit Courtesy: Biswas Lab Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.