United Water Conservation District is conducting a seismic reflection survey to assess the geologic conditions within the southern Oxnard Plain. The purpose of the study is to gain a more comprehensive understanding of the characteristics of the Oxnard, Magu, Hueneme, Fox Canyon and Grimes Canyon aquifers. Multiple interpretations of existing data (e-logs and drill cutting) have resulted in conflicting interpretations of the structural geology associated with the Plio-Pleistocene sediments in this area (including the existence/nonexistence of a dome structure). Therefore, a high resolution seismic reflection survey is deemed necessary to more definitively determine the structure and stratigraphy at depths extending to approximately 1,000 feet below ground surface. An increased understanding of the subsurface geology in the vicinity of the field survey area will aid United Water Conservation District and associated agencies in managing local water resources. United is contracting with a Geophysical Services Company to conduct the seismic reflection survey in the near urban/agricultural setting. United Water will coordinate all encroachment permits and access rights associated with the seismic survey. Field work for the project will be conducted in August of 2010. The survey location is near and within the outer suburbs of the City of Oxnard/Port Hueneme and the agricultural fields in that area. Approximately six (6) miles of seismic reflection data are estimated to be obtained.