Here are a couple of nearby events and a useful link to Alameda County resources.
Castro Valley, Ca
Festival – SAT – April 19 – 11 AM TO 3 PM
Hayward City Hall & Plaza
San Lorenzo Creek Clean-up
April 19 – 8:30 AM to NOON
Sign-up by Thursday, April 17 http://www.hayward-ca.gov/citygov/meetings/tf/khcg/documents/Registration_Jackson.pdf
Alameda County Waste Management