On a rainy Saturday morning in February, Josh Gunter organized the cleanup equipment for the day ahead — buckets and trash-pickers, elastic gloves and trash bags, coffee and water. Then he waited for volunteers from Friends of Raimondi Park to arrive for the monthly cleanup event. Gunter was among more than a dozen residents who braved the weather that morning to pick up trash, rake and sweep. Friends of Raimondi Park, one of the many groups participating in Oakland’s “Adopt…