The City of San Jose had been monitoring groundwater conditions at Singleton Landfill for decades. When the San Francisco Regional Water Quality Control Board (RWQCB) asked for a more detailed analysis of some recent and historical data, the request was beyond the City’s resources. The City retained RRM to help comply with the RWQCB’s request. To address the RWQCB request, we completed an in-depth statistical analysis of historical groundwater data. In addition, we provided groundwater sampling and monitoring services for the landfill. With our understanding of the site, we were able to reduce operating costs by achieving modifications to the sampling, monitoring, and reporting requirements mandated by the RWQCB.