Office of Spill Prevention & Response About OSPR Cal Spill WatchCal Spill WatchCal Spill Watch(opens in new tab) Contingency & Response Plans Drills & Exercises / ICS Enforcement Financial Responsibility Harbor Safety Laws & Regulations News & Publications Grants & Outreach Oil Spill Response Organizations Response Resources Restoration (NRDA) Science & Wildlife Spill Management Teams Volunteer Opportunities Summary Spill Location. LOCATION: McNabney Marsh, Carquinez Strait, and adjacent waters, Contra Costa County DATE: April 23, 1988 INCIDENT SUMMARY: A leaking tank at the Shell oil refinery drained approximately 400,000 gallons of crude oil into a nearby creek. The oil then ran into a marsh and into the bay. RESPONSIBLE PARTY: Shell Oil Company NATURAL RESOURCE TRUSTEES: California Dept. of Fish and Wildlife; California State Lands Commission; United States Fish and Wildlife Service; National Oceanic and Atmospheric Administration. RESOURCES IMPACTED: Wetland habitat; fish. SETTLEMENT DETAILS: The trustees settled the NRDA portion of the case for $10.8 million. STATUS OF RESTORATION: COMPLETE. Available Documents Final Shell / Martinez Restoration Report (PDF) Contact Michael Anderson Email: Michael.Anderson@wildlife.ca.gov Phone: (916) 375-6672