255 



lying in the southern or inshore stations. For the vast 

 majority of cards a figure of 0.2 MPH is a reasonable average 

 velocity. 



More important than the maximum velocities for special 

 regions such as the southern end of the bay, are the data 

 obtained from the stations located at the approximate sites 

 of the proposed sludge and effluent outfalls. Reference is 

 again made to Table XII, in which those data are summarized. 

 In no case was a velocity greater than 0.58 MPH recorded 

 from a sludge or effluent outfall station. The single case 

 of a maximum velocity greater than 0.31 MPH was recorded 

 from the effluent station on June 19, 1956. These figures 

 are significant because the velocities represent the limits 

 within which coliform organisms from primary effluent of the 

 type fotind at Hyperion will be reduced to legal specifications 

 at the beach. This matter is discussed in detail in the 

 section of the report of the University of Southern California 

 which deals with the bacteria, but the general conclusion is 

 that under the conditions specified, the coliform standards 

 as now established by the State Water Pollution Board probably 

 will be met. 



The obvious question now arises, can velocities in excess 

 of those described ever occur at the outfall stations in the 

 central part of the bay? The answer must be in the affirmative 

 It seems reasonable that under conditions of strong westerly 

 winds, and perhaps rarely under other circumstances, higher 

 velocities may occur. None of our observations were made 

 under storm conditions. Exactly how often this might occur, 



