Davis Alan C.

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Alan C.

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  • Technical Report
    Volatile organic compounds in Narragansett Bay, Rhode Island
    (Woods Hole Oceanographic Institution, 1982-08) Wakeham, Stuart G. ; Goodwin, Jeffrey T. ; Davis, Alan C.
    Volatile organic compounds (VOC) have been determined in Narragansett Bay, Rhode Island, water samples as part of an investigation into the sources, fates, and transport of volatile organic compounds in estuarine and coastal seawater. This report tabulates the concentrations of a wide range of VOC along a transect 1n Narragansett Bay for two summer and two winter sampling cruises.
  • Technical Report
    Hydrocarbons, polychlorinated biphenyls, and DDE in mussels and oysters from the U.S. Coast - 1965-1978 - the mussel watch
    (Woods Hole Oceanographic Institution, 1982-10) Farrington, John W. ; Risebrough, Robert W. ; Parker, Patrick L. ; Davis, Alan C. ; De Lappe, Brock ; Winters, Kenneth ; Boatwright, Dan ; Frew, Nelson M.
    Mytilus edulis, Mytilus californianus, Crassostrea virginica and Ostrea equestris were sampled at 90 to 100 stations around the United States coastline during each of three years- 1976, 1977, 1978. Data for concentrations of PCB, DDE, total hydrocarbons, gas chromatographically unresolved complex mixture hydrocarbons, and selected aromatic hydrocarbons are presented for most of the samples. Similar data for monthly samples of Mytilus edulis from Narragansett Bay, Rhode Island, U.S.A. and Mytilus californianus from Bodega Head, California, U.S.A. and laboratory intercalibrations are presented and discussed. Monthly temporal changes of factors of two to ten were found for ·organic pollutants in mussels from the Narragansett Bay station. Concentrations of PCBs and fossil fuel hydrocarbons for some urban stations were one to two orders of magnitude higher than those in remote areas. The northeast "megapolis" of the U.S. coast from the Chesapeake Bay area to Boston, Massachusetts clearly shows elevated concentrations of PCBs and fossil fuel hydrocarbons. The composition of aromatic hydrocarbons in samples with elevated concentrations shows both the influence of oil spill or chronic oil inputs and pyrogenic sources.
  • Technical Report
    No. 2 fuel oil compound retention and release by Mytilus edulis : 1983 Cape Cod Canal oil spill
    (Woods Hole Oceanographic Institution, 1986-03) Farrington, John W. ; Xiaoping, Jia ; Clifford, C. Hovey ; Tripp, Bruce W. ; Livramento, Joaquim B. ; Davis, Alan C. ; Frew, Nelson M. ; Johnson, Carl G.
    Retention and release of No. 2 fuel oil compounds by Mytilus edulis contaminated by a small oil spill in the Cape Cod Canal in 1983 has been studied for the population "in situ" and for a subsample transplanted to a clean laboratory seawater system. Compounds analyzed include C13 to C24 n-alkanes; pristane; phytane; C2-, C3-naphthalenes; fluorene; phenanthrene; C1-, C2-, C3-phenanthrenes; fluoranthene; pyrene and dibenzothiophene. Biological half-lives were determined for the compounds from Day-3 to Day-29 following the spill and ranged from 1.5 days for C2-naphthalenes to 9.9 days for C2-phenanthrenes. Biological half-lives for the unresolved complex mixture determined by gas chromatographic analyses were 17 days for the alkane-cycloalkane fraction and 35 days for the aromatic fraction. Results compared favorably with data from a small oil spill contaminating the same mussel population at the same time of the year in 1978, although marked differences were noted for certain parameters. Gas chromatographic-mass spectrometer analyses of C2- and C3-phenanthrenes revealed changes in relative abundance of compounds within isomer groups from samples at Day-29 to the time when no further detection of fuel oil was noted. These results suggest a release or metabolism of these compounds which is molecular structure specific. This study also demonstrated the feasibility of training an analyst unfamiliar with analyses of hydrocarbons in tissues to conduct high resolution glass capillary GC analyses and some aspects of GCMS data systems output within a period of four to five months.