The business was founded in 1894, two years after Clifford C. Graber and his brother, Charles, arrived from Clay City, Indiana.
At that time, Bob Graber moved the growing operation to 75 acres of olive groves in the San Joaquin Valley, near Porterville, where it remains.
Once the olives arrive at the Ontario site, they are graded by size, then cured in one of 550 concrete vats for three weeks.
After they are removed from the vats, the olives are fed through a filling wheel, where employees scoop them by hand into aluminum cans running on a conveyor belt.
A "Panama paddle packer" machine creates a 200-degree steam bath as cans are sealed tight with aluminum lids.
In a good season, the business processes approximately 150 tons of olives, which they ship to markets, gourmet stores and customers globally, according to Duncan.
[3] Schwartz, Penny E., Special to The Press-Enterprise Guerrero, Christina, staff writer, Ontario Olives Pampered, Perfect, Inland Valley Daily Bulletin Newspaper, October 24, 2003, page A3