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JOHN GLUDE 

 the final report which they published in March of this 

 year . 



In our opinion, this report presents an 

 excellent study of an extrenoely complex problem. The 

 research methods used were generally appropriate and the 

 analysis of results was well documented. The investigators 

 utilized talents of State and university scientists in the 

 Pacific Northwest in the conduct of portions of the studies 

 and in the planning of experiments and the statistical 

 analysis of the results. 



The report presents solid scientific 

 evidence of water pollution and its cause in the study 

 areas. The variety of observations and analyses, and the 

 extended period covered by the study strengthen the con- 

 clusions. In our opinion, the report provides a factual 

 basis for recommended actions which will be necessary to 

 reduce pollution in these areas to acceptable levels. 



We are concerned that the studies may not 

 have gone far enough in identifying the deleterious effects 

 of low concentrations of the pollutants. For example, 

 short-term experiments demonstrated that juvenile salmon 

 were killed when subjected to high concentrations of 

 sulfite waste liquor, or to adverse conditions resulting 



from sulfides released by sludge beds, but there was no 



