COLUMNS 5^ - 56 PHOSPHATE 



Enter inorganic phosphate in microgram- atoms per liter (ug-at/l) to 

 hundredths. Conversions from other units are shown in Tables 33-35- 



COLUMNS 57 - 59 TOTAL PHOSPHORUS 



Enter total P in microgram-atoms per liter (ug-at/l) to hundredths. 



COLUMNS 60 - 62 NITRITE- NITROGEN 



Enter nitrite-nitrogen (NOg-N) in microgram-atoms per liter (ug-at/l) 

 to hundredths. Conversions from micrograms per liter of NOg to micro- 

 gram-atoms per liter of NO2-N are shovra in Table 36. 



COLUMNS 63-65 NITRATE- NITROGEN 



Enter nitrate-nitrogen (NO^-N) in microgram-atoms per liter (ug-at/l) 

 to tenths. Conversions from micrograms per liter of NO^ to micrograms- 

 atoms per liter of NOo-N are shown in Table 37' 



COLUMNS GG - 68 SILICATE- SILICON 



Enter silicate-silicon in microgram-atoms per liter (ug-at/l). 

 Conversions from other units are shown in Tables 38-^0' 



COLUMNS 69-71 pH 



Enter ^H in Columns 69-71' 



COLUMN 72 

 This column (reserved for NODC) is to be left blank. 



Columns 73-79 are omitted from the data form; on the punch card these 

 will be reproduced automatically from the Master Card to provide each 

 Detail Card with reference identity and consecutive niimbers. 



13 



