4QQ 



1 STATE OF WASHINGTON DEPARTMENT OF FISHERIES - EXHIBIT D 



2 number of samples where associated with fecal sources.) 



3 Not to exceed limits specified in the National 



4 Shellfish Sanitation Program Manual of Operations, USPHS. 



5 2. Dissolved Oxygen (mg/l) 

 g Greater than six (6) mg/l in the larval 



7 stage. Greater than 5 (5) mg/l in the adult stage. 



8 3. PH 

 2 Hydrogen ion concentration expressed as pH. 



10 

 11 



13 



15 

 16 



18 

 19 

 20 



22 

 23 



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- 



j2 made activities 



4. Turbidity 



j^ Turbidity for marine and estuarial waters, 



upper 10 meters (32.5 ft) to be based upon vertical ex- 

 tinction coefficient. Standards should be coastal maxi- 



2» mums as listed in Table 22, p. 84 and by Figure 20, p, 



85, The Oceans , Sverdrup, Johnson, and Fleming, 1946. A 

 Secchi disc may be used for determination of vertical ex- 

 tinction coefficient using the ratio of 1.7 divided by 



21 Secchi disc reading (Secchi disc reading in meters for a 



30 centimeter diameter white disc) for blue light as developed 

 by Poole and Atkins, 1929^ Journal Marine Biological Asso- 



24 elation. United Kingdom (I6). 



25 No material should be added to the water 



