For EAH
Point Reyes Station, Marin County, California

Questa provided storm water, hydrologic, and wastewater engineering services for this housing project, which includes several small single-family residences, low-cost rental units, a small farm, public restrooms, parking facilities, and a small commercial lot. We prepared the analysis and design for infiltration drainage and wetland enhancement to minimize effects on town storm drainage facilities. The infiltration drainage systems included shallow sedimentation-settling basins, infiltrator trenches, and grass infiltration swales for collection, treatment, and subsurface dispersal of runoff from roof downspouts, parking areas, and roadways. We also conducted extensive soil, groundwater, and percolation testing. The facilities include a mix of individual and cluster systems, combining conventional designs, pressure-dosed systems, and mounds. Questa completed cumulative nitrogen loading and groundwater mounding studies to verify site suitability and appropriate development density. We installed  eight deep monitoring wells and completed a hydrogeologic investigation for environmental analysis of the project on local groundwater resources. The project, developed in an iterative planning process involving project planner, architects, civil engineer, and public groups, went into construction in 2004.