AGS was responsible for collecting groundwater data and samples at nine monitoring wells at the Harry Tracy Water Treatment Plant in San Bruno. Work included purging, sampling and analysis of groundwater from wells/piezometer. Samples were collected after obtaining stable readings of pH, temperature, conductivity and salinity. Laboratory testing on groundwater samples were in accordance with CAM17 metals using EPA Method 6010B, Hexavalent chromium using EPA Method 7199 and total fluoride using EPA Method 9214. Surface water was collected at three existing discharge points at the water treatment plant and analyzed for residual chlorine and total fluoride.