 Since runoff from the Funston approach was directed into the lake, golf course pesticides and lead emissions from cars burning leaded gasoline were dumped into the lake over many years.The lake also became a dumping ground for unwanted pets, including crawdads, large-mouth bass, goldfish, carp, bullfrogs, turtles, and even an alligator, which was discovered and removed in 1996.A variety of birds can be observed around the lake's water, including California seagulls and ducks.