and clogging o£ the discharge lines. It would also probably be necessary 

 to increase the size of the discharge lines to assist in maintaining a 

 higher velocity throughout the lines, by reason of decrease in friction 

 component. The above information indicates that in laying out an eductor 

 system, the prime design consideration is that the velocity throughout 

 the sand lines must always be great enough to keep the suspended material 

 from settling and sanding up the discharge line. 



3. Since the sand or soil must be delivered to the eductor suspended 

 in water, a hydraulic giant or similar equipment for jetting and dislodging 

 the material from the borrow pit and sluicing it down to the eductor is 

 required. The location of the borrow pit with the required quantity of 

 material must have an elevation above the eductor sufficient to provide 

 adequate drop for sluicing the material down to the eductor. 



The Figures (photos) show the progress of the operations from their 

 start to the present time, indicating the transformation that has occurred 

 both at the area where the sand was taken and the area where it was deposited. 

 The material has been removed from three separate areas in the same loca- 

 tion. At the point of this writing, these three locations are commencing 

 to blend into one large removal area. The present area of depositing 

 material is about 1 mile north of Ballona Creek. 



19 



