showed that the cooling water discharge by the power plant contained 

 similar levels of the metals analyzed as those found in ambient Niantic 

 Bay waters. 



This report recommends present sampling and analytic methodology 

 remain consistent so future comparisons may be made with a reasonable 

 degree of certainty. The need for including more statistics (eg: ANOVA) 

 is also mentioned for future reports. 



WINTER FLOUNDER 1973 - 1982 



Winter flounder have been the object of a number of intensive 

 studies at Millstone designed to provide information necessary for the 

 assessment of power plant impact. 



Surveys have been undertaken in late winter and early spring in the 

 Niantic River to estimate the population of winter flounder in this 

 important local spawning area. The data provided from the surveys have 

 been used in an impact assessment model. Estimates have been made from 

 1973 to the present, although a sampling design using the Jolly method 

 for open populations first began in 1976. The assumptions of the Jolly 

 method and methodologies used during the population surveys were evaluated. 

 Most serious violations of assumptions included the occurrence of temporary 

 outmigration and probable differential recapture of small winter flounder. 

 These violations have most likely resulted in some error or bias in the 

 population estimates. In addition, the results of the 1975 and 1980 

 surveys are probably less accurate than those of other years, mostly 

 because of survey design during these years. It was recommended to 

 obtain and implement a new computer program package to provide more 

 flexible analyses of the population data. In addition, the population 



