 This area became known as "Battery Point" because of the large number of batteries buried there.Industrial uses from pesticide manufacturing to waste oil recycling, as well as a pistol range, left the land north and east of Point Isabel among the most polluted brownfield sites along San Francisco Bay, although some of these have been remediated.Dumping also changed the south shore; for example, the area known as "Tepco Beach" is covered with pastel fragments of china from an El Cerrito manufacturer.