V-289 



flow of 153 million gallons per day do not have disinfection 

 facilities. 



A total of 269 million gallons per day of industrial wastes is dis- 

 charged into the Bay system by 47 industries. It is estimated that 

 approximately 94 percent of this waste flow is cooling water drawn 

 from the Bay system and circulated in closed cooling systems. Most 

 of the industrial waste discharges are located along the shorelines 

 of Contra Costa County and discharge their wastes to San Pablo or 

 Suisun Bay. These discharges contribute more than 70 percent of 

 the biochemical oxygen demand loading in these areas; however, the 

 depletion of dissolved oxygen below 5 nlg/l has not been measured 

 irrmediately beyond industrial waste effluent dilution areas delin- 

 eated by the Regional Board. 



The number, location, and degree of treatment of both municipal and 

 industrial waste discharges changes with the continuing implement- 

 ation of recommendations in studies of sewerage needs and of master 

 plans. 



Storm water runoff not containing sewage, discharged from storm 

 sewers, from flood control channels and from tributary streams is 

 a factor affecting water use. Also governing water usability are 

 the sediments from such activities as: agricultural practices, 

 residential development, highway construction, and mining of natural 

 resources. 



