23 



Maxima and Minima 



Maxima and minima values were selected from the data at 

 all depths within 3,000 feet of the outfall o They give an 

 indication of the dispersion of nutrients in the vicinity of 

 the outfall areas (Table Do 



Around the Orange County outfall occurred two of the 

 highest concentrations and two of the second highest of the 

 four nutrients determined. Whites Point, on the other hand, 

 had three of the lowest values and one of the highest. The 

 former are attributed to the simple dispersion of the nutrients 

 at Orange County; the latter, among other previously mentioned 

 factors, the better diffusion through a longer water column 

 and the characteristics of the effluent. The chance that 

 sampling at the various outfalls has missed the areas of very 

 high concentration in the boil must also be considered. 



Enrichment of the Outfall Area in Nutrients 



An accurate calculation of dilution in the boil and the 

 dimunition of nutrients with distance cannot be made because 

 of the lack of information on the concentrations in the sewage. 

 A comparison is made, however, with the concentration of salts 

 in the surrounding shelf water at a sufficient distance from 

 the outfall area to be free from the influence of the effluent. 

 The factor in Table II gives the increase of maximum nutrient 

 values in the vicinity of the outfall over the values obtained 

 in normal sea water. With the exception of nitrate-nitrogen, 

 the increase above the surrounding sea water is lowest at 



