31 
count to expect, since this is the safest assumption that can 
be made. 
The count at the boil could be higher than the figure 
chosen if either the estimate of initial dilution is too high, 
or if the coliform content of the primary effluent is higher 
than the figures cited. Although reasonable estimates of the 
"worst™ situation are difficult to arrive at, one would not 
expect any appreciable volume of a primary effluent to have a 
coliform content of greater than 2,000,000/m1, nor would one 
expect the proposed outfall to give a lower initial dilution 
than the present outfall, or 1/2156 Using these two values 
for the worst situation that might exist at any time at the 
proposed outfall, a value of 80,000/ml is obtained for the 
boil count. 
Using the average and worst values arrived at, one can 
calculate the expected coliform count at any time of travel 
from the outfall. In Figure 8 is a graphic presentation of 
these calculations. From these curves it can be seen that 
movement of the water to the surf zone in less than 95 hours 
is required before the State Standards for the beach would be 
exceeded under averaged conditions of initial coliform popu- 
lation and disappearance rate. The comparable figure for the 
worst situation envisioned is 173 hours. These times corres- 
pond to critical current velocities directed towards the beach 
of 0.58 and 0.31 statute miles per hour, respectively. At 
these velocities the calculated geometric mean of the B and C 
station counts are 72 and 100, respectively. In other words, 
if the beach stations meet State specifications, then the B 
and C stations will also comply. 
