IV-231 



Kelp 



There is an abundant supply of kelp in Pacific Ocean offshore 

 waters. Its chief value is as a source of iodine. The San Diego 

 Bay area is a natural location for the kelp-processing industry. 



Chemical Industry 



The San Diego Unified Port District operated an oil separation 

 unit at its Tenth Avenue Marine Terminal for processing ballast 

 and bilge water of ships using District facilities. The unit has 

 a capacity of 1.0 mgd, but has been used intermittently and far 

 below its capacity. 



Manufacturing 



Manufacturing is the largest civilian, non-governmental component 

 of the economy of San Diego County. It is largely dependent on 

 aircraft and ordnance production. In 1967, 32,200 of the 

 County's 61,700 manufacturing employees (or slightly over 50 per 

 cent) were in aircraft and ordinance. The total manufacturing 

 payroll for 1967 was over $496 million. 



Trade (Wholesale and Retail) 



In 1967, total annual wages in the trade-industrial category were 



