Office of Spill Prevention & Response About OSPR Cal Spill WatchCal Spill WatchCal Spill Watch(opens in new tab) Enforcement Grants & Outreach Harbor Safety Laws & Regulations News & Publications Preparedness, Planning, & Exercises Response Resources Restoration (NRDA) Science & Wildlife Volunteer Opportunities Summary Spill Location. Spill Cleanup. LOCATION: Nipomo Dunes, San Luis Obispo County. DATE: Chronic, remediation in progress INCIDENT SUMMARY: At least 80 plumes of diluent, associated with leaks in pipelines that may have lasted for decades, were detected in and near the Guadalupe Oil Field at the Nipomo Dunes. These leaks have released an estimated 12 million gallons of diluent into the dunes, beach, groundwater, and Pacific Ocean. RESPONSIBLE PARTY: Unocal NATURAL RESOURCE TRUSTEES: California Dept. of Fish and Wildlife; California Coastal Conservancy. RESOURCES IMPACTED: Dune habitat; wetlands; groundwater; intertidal habitat. SETTLEMENT DETAILS: The trustees settled the NRDA portion of the case for $9 million. STATUS OF RESTORATION: Final Restoration Plan completed; restoration projects now in progress; see Final Restoration Plan for details. Available Documents Final Restoration Plan (PDF)(opens in new tab Contact Michael Connell Email: Michael.Connell@wildlife.ca.gov Phone:(805) 568-1229