ENTRY DESCRIPTION OF FIELD 



Total phosphorus in mlcrogram-atoms per liter 

 of P to hundredths. 



Nitrites in microgram-atoms per liter of N to 

 hundredths . 



Nitrates in microgram-atoms per liter of W to 

 tenths. 



Silicates in microgram-atoms per liter of Si. 



pH pH to hundredths. 



NOTE: (l) Notation TRC in chemistry fields indicates report of trace 

 or a value less than 1 in the last column. 



(2) A numeral appearing two spaces beyond the pH column is an 



Optional Chemistry Substitution code. The optional chemistry 

 fields are numbered from left to right beginning with 

 PO4-P = 1 through pH = 6. The code numeral indicates that 

 the entry in the respective field is NOT as given on the 

 template. (A special template with the correct field 

 designator will be furnished for publication purposes by 

 special request only. ) 



26 



