60 
that on occasion the State standard of not over ten per ml in 
20 per cent of the samples is exceeded. ‘he area of excess counts 
extends from about 3,000 feet down coast to 15,000 feet up coast 
from the outfall. If the morning and afternoon samples are con- 
sidered separately, the picture differs somewhat in that the 
polluted area is more restricted in the afternoon and extends 
farther upcoast in the morning (Fig. 16). 
Contrary to what one would expect from the coliform distri- 
bution observed in the ocean, the area of excessive counts did 
not show a peak within the beach zone less than 6,000 feet from 
the outfall. This is particularly surprising because on at 
least one occasion a dye patch experiment showed that the sewage 
field could reach the surf zone in a period of three hours. The 
occurrence of excessive coliforms on the beach over 15,000 feet 
away from the outfall is also incompatible with the coclusion 
that the coliform field does not extend for more than 6,000 feet 
from the outfall. 
Assuming that the dye patch and profile experiments give a 
representative picture of the coliform field in the ocean on the 
days of the experiments, and there is no reason to believe other- 
wise, several explanations may be offered for the discrepancies 
between the beach and ocean distribution. First, and least 
probable, is that the observed beach counts are due to "bootleg" 
sewage introduced at points upcoast from the outfall. A check 
of the area failed to show any source of sewage of sufficient 
magnitude to be responsible. 
The second possibility is that high beach counts occur only 
on days when unusual conditions exist. If, for example, currents 
