RICHARD C. SLADE & ASSOCIATES LLC Consulting Groundwater Geologists RCS is comprised by a group of groundwater geologists focused on the development, protection, and management of groundwater resources throughout California. Whether it be evaluating the groundwater resource potential of a community or vineyard, siting and designing a new well, rehabilitating an existing well or wellfield, conducting pumping tests and drawdown interference analysis, or assessing water quality or other down-hole problems in your existing wells, RCS is available to help solve your groundwater issues.