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Summary of Chemistry Results: Shoreline Monitoring Study in Prince William Sound, Alaska During the Summer of 1995: Chemistry Report
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1999
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[PDF-25.77 MB]
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Description:In 1989, the T/V Exxon Valdez ran aground and released roughly 11 million gallons of Exxon Valdez Oil (EVO) into Prince William Sound, Alaska. Since 1990 the Hazardous Materials Response and Assessment Division (HAZMAT) of the National Oceanic and Atmospheric Administration (NOAA), has sponsored an integrated biological, geomorphological, and chemical monitoring study to assess the effects of high-pressure, hot-water washing and the persistence of stranded oil on shoreline ecology and recovery. The annual monitoring results document the intertidal biological species and species abundance, the chemical state of the EVO and sediment concentration, and the uptake of EVO by bivalve species. The results are synoptic, representing June to July 1995, relative to the polynuclear aromatic hydrocarbon (PAH) concentration and PAH profiles alterations/weathering, but are part of a larger research agenda, therefore, only chemistry samples analyzed during 1995 are discussed. The 1995 Prince William Sound Chemistry Report provides the EVO quantitative values for sediments and biological samples, weathering trends, and source fingerprint results. The 1995 NOAA Shoreline Monitoring Survey focused on biological sites and three additional special studies projects. A total of 91 samples of clams, mussels, surface, and subsurface sediments were collected for possible chemical analysis. All samples were sent to the Institute for Environmental Studies, Louisiana State University (LSU) for archival storage.Of these samples, 61 were selected for gas chromatography/ mass spectroscopy (GC/MS) detailed analysis. Most of the samples were Mytilus cf. trossulus (mussels). EVO was detected in many of these samples even 6 years after the T/V Exxon Valdez incident.
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