SAN FRANCISCO - Response team members with the Cosco Busan Incident use a fluorometer to test the amount of oil at different depths in Berkeley Marina Nov. 21, 2007.Three areas were surrounded by containment boom and used to test two oil-lifting chemicals on oiled rocks. The third area was a control area and was only sprayed with salt water.The Unified Command will select the most environmentally friendly and most effective method to supplement ongoing response efforts.U.S. Coast Guard photograph by Petty Officer 2nd Class Andrew Kendrick