Appendix A 



This appendix lists all 234 sites sampled in the NS&T Mussel Watch Project. The 

 most recent year of sampling (up to 1990) is listed in the column headed "yr." 

 Concentrations in that year have been compared with "high" concentrations listed 

 in Table 2, and a dot (•) in columns headed by symbols for chemicals indicates that 

 the mean concentration exceeded the "high" value. Sites that have been sampled 

 in at least four years between 1 986 and 1 990 are printed in bold type. The species 

 sampled (column Sp) are the mussel Mytilus edulis ("me"), the oyster Crassostrea 

 virginica ("cv"), the mussel M. californianus ("mc"), and the oyster Ostrea 

 sandvicensis ("os"). The numbers of people residing within 20 km of each site 

 according to the 1990 census are categorized as 1 through 6 under the heading 

 "pop" by this scheme: category 1 for less than 1 0,000; 2 for 1 0,000 to 50,000; 3 for 

 50,000 to 1 00,000; 4 for 1 00,000 to 500,000; 5 for 500,000 to 1 ,000,000; and 6 for 

 more than 1 ,000,000. 



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