Collection place
- CA-CCo-124, San Ramon, Contra Costa County4
- CA-CCo-126, El Sobrante, Contra Costa County82
- CA-CCo-128, Oakley, Contra Costa County9
- CA-CCo-129, Oakley, Contra Costa County2
- CA-CCo-13, Concord, Contra Costa County2
- CA-CCo-133, Walnut Creek, Contra Costa County2
- CA-CCo-135, Bethel Island, Contra Costa County25
- CA-CCo-137, Pleasant Hill, Contra Costa County121
- CA-CCo-138, Oakley, Contra Costa County7,404
- CA-CCo-139 (Simone Mound), Oakley, Contra Costa County325
- CA-CCo-14, El Sobrante, Contra Costa County161
- CA-CCo-140, Bethel Island, Contra Costa County2
- CA-CCo-141, Palm Tract, Contra Costa County520
- CA-CCo-142, Orinda, Contra Costa County37
- CA-CCo-145, Byron Tract, Contra Costa County17
- CA-CCo-146, Holland Tract, Contra Costa County68
- CA-CCo-148, Orwood Tract, Contra Costa County35
- CA-CCo-15, Walnut Creek, Contra Costa County41
- CA-CCo-150, Veale Tract, Contra Costa County35
- CA-CCo-151, El Sobrante, Contra Costa County2,212