||Stanford Univ., Pacific Grove, Calif. Hopkins Marine Station.;Environmental Protection Agency, Washington, D.C.;Naval Postgraduate School, Monterey, Calif.;California Academy of Sciences, San Francisco.;Pacific Northwest Environmental Research Lab., Corvallis, Oreg.
The concentration of the three chlorinated hydrocarbons, DDT, DDD, and DDE, were measured in sediments at 57 stations in Monterey Bay on the Central California coast during 1970 and 1971. Mean concentration in parts per billion was DDT 3.1, DDD 2.3, and DDE 5.4. Maximum concentrations were DDT 19.3, DDD 8.7, DDE, 20.5 parts per billion. The distribution of the three compounds within South Monterey Bay was charted. During 1973 nineteen of the original stations, representing locations that were low, intermediate, and high concentrations in the original survey, were resampled. The mean concentration approximately three years later were DDT 15.5, DDD 2.3, and DDE 5.4 parts per billion with maximum levels of DDT 83.1, DDD 11.4, and DDE 17.5 parts per billion. A chart of the concentrations in South Monterey Bay revealed essentially the same distribution of chlorinated hydrocarbons.