^e 



MARVIN ALLUM 



"Briefly, the field-sample study clearly 

 demonstrated the adverse effect of pulp and paper mill wastes 

 on the marine environment in that: 



"1. The number of abnormal larvae increased 

 as SV\fL concentration increased; 



"2. The number of abnormal larvae increased 

 as the distance from each mill's discharges decreased (and 

 SWL increased) ; 



"3. When the pulp and paper mills were not 

 operating, as during the November 1964 strike, larval ab- 

 normality dropped to near zero in the strike-affected study 

 areas; but remained at about the usual levels in the Everett 

 study area where one of the mills continued production. 



"4. When production in the strike-affected 

 areas was resumed, larval abnormalities immediately climbed 

 back to the former levels; 



"5. Larval abnormality began to increase 

 very rapidly at SWL concentrations of about 10 ppm and 

 reached near-100:^ at 40 to 60 ppm SWL, depending on the 

 study area. 



"It is interesting to note that contrary to 

 the contention that SWL concentrations (as measured by the 

 Pearl-Benson test) of 10 ppm or less are 'background' 

 levels--! .e . , attributable to substances other than SWL-- 



