Technical guidance CDPHE guidance for sampling for lead. 3Ts for Reducing Lead in Drinking Water in Schools - EPA guidance. Training videos Collecting initial samples How to - from a sink. How to - from a drinking fountain. How to - from a water bottle filling station. How to -from a water cooler. How to - from an ice machine. Collecting flush samples How to - from a sink. How to - from a drinking fountain. Collecting service line samples How to - from a service line. Labs certified to test your samples for lead