PWSRCAC-EVOS long-term environmental monitoring program

This report reevaluates historic trends and intercalibrates laboratory analyses. To test for hydrocarbons, deep sediments were sampled at two Port Valdez sites. Blue mussel (Mytilus trossulus) tissue was collected during the summer and late winter at 10 sites in the Prince William Sound, Kenai Peninsula, and Shuyak Island and during the fall at the same Port Valdez sites. These intertidal sites monitored by the LTEMP program were deemed extremely clean, though hydrocarbon concentration is higher at the Alyeska Marine Terminal and the Gold Creek site in Port Valdez.