VI-183 



Surveys to identify existing polllution in the estuary and 

 in tributary streams 



A. Literature survey of existing knowledge 



B. Field studies to identify and measure the amount and 

 seasonal occurrence of pollutants 



1. Chemical pollutants 



a. Organic 



i. economic poisons, e.g., herbicides, pesticides 



ii. detergents 

 iii. oils and solvents from industry 



b. Inorganic 



i. metal ions 



ii. substances that alter the acid-base balance 

 of the estuary 



2. Sewage and waste discharge pollutants 



a. excess plant nutrients 



b. pathogens, e.g., bacteria, viruses, parasites 



c. solid wastes that increase turbidity, form 



sludge beds, or settle out to cover over the bottom 



3. Fresh water 



