2Z8rL 



STATEMENT BY STORRS WATERMAN 



oxygen values are traditionally and naturally low. To the 



best of our knowledge the subject of oxygen requirements 



for mollusks has not been considered an Important area 



for Investigation because of the above observations which 



show that oxygen has not been a problem. 



"Except for the special case of razor clam 

 propagation on the outer coast line, other water uses In 

 areas of shellfish propagation will necessitate a higher 

 level of oxygen than that required by mollusks. 



"In the proposed criteria described by Mr. 

 Graunke we submit in more constructive detail our recommenda- 

 tion for the various levels of oxygen required for fish and 

 wildlife propagation. 



"3. For general waters we consider that a 

 range of pH from 6.0 to 9-0 to be satisfactory for all 

 uses Indicated. The Induced variation due to a discharge 

 must be measured after a reasonable degree of effluent 

 mixing with the body of water being studied. 



"The range proposed of 7.8 to 8.5 for shell- 

 fish areas is unnecessarily restrictive. Natural conditions 

 now may exceed the limits proposed in many instances. We 

 recommend a range of 6.5 to 9.0. 



"4. It is difficult to establish a valid 

 and meaningful number for turbidity because there is little 



