538. 



STATE OF WASHINGTON DEPARTMENT OF FISHERIES - EXHIBIT E 



Fresh water 



Consideration of the fishermen is required. 

 Recommend the same parameters as for bathing, swimming, 

 and recreational uses of water. (Average less than 24o 

 per 100 ml and not exceed this in more than 20% of samples.) 



2. Dissolved Oxygen (mg/l) 



Marine and estuary 



Greater than six (6) mg/l. 



Fresh water 



Greater than 95^ saturation with a minimum 

 value of 7 mg/l. These values to be present at the diurnal 

 and seasonal lows and when temperatures exceed 60 F (15.6 C). 



3. PH 



Marine and estuary 



Hydrogen ion concentration expressed as pH. 

 Between pH range of 7.8 and 8.5. Sudden changes of pH units 

 of 0.5 or more should not occur as a result of man-made 

 activities. 



Fresh water 



Hydrogen ion concentration expressed as pH. 

 Between pH range of 6.5 and 8.5 unless historical natural 

 values (conditions) lie outside that range. Sudden changes 

 of pH values of 0.5 or more should not occur as a result of 

 man-made activities. 



I 



