Sampling began in November 1998. Three sites (North Bay, Central Bay, and South Bay, 12 to 15 m depth) in Kaneohe Bay were selected as close as possible to the sites used during the EPA study of the Bay in the 1970s (Smith et al., 1981). The only change was that the "Outfall" site was dropped as there is no longer sewage discharge at that location. This site was replaced with the Kaneohe Stream (KS) site, near the mouth of the stream in a depth of approximately 2 m.  In May 1999, an additional site (MP for Mid-Plume) at 6 m depth was added and replaced the KS site in October 1999.