5.15 SHORELINE SEDIMENT INGESTION

    The model for inadvertent ingestion of shoreline sediments requires an estimate of the time spent in shoreline activities and the rate at which shoreline sediments are ingested. Default values for these parameters are given in Table 5.15.

    Note that the product of shoreline event time and shoreline frequency is equal to an average daily exposure time of 0.033 hours, consistent with the initial MEPAS daily shoreline exposure time. The hourly sediment ingestion intake values are set equal to the daily USEPA (USEPA 1989) recommended values for soil ingestion intake. This is done because shoreline activities are expected to represent a high-contact situation and inadvertent ingestion rates would be considerably higher than rates for normal daily activities.