Collection place
- CA-CCo-NL-11, El Cerrito, Contra Costa County4
- CA-CCo-NL-12, Richmond, Contra Costa County24
- CA-CCo-NL-13, Concord, Contra Costa County2
- CA-CCo-NL-14, Lafayette, Contra Costa County2
- CA-CCo-NL-15, Walnut Creek, Contra Costa County2
- CA-CCo-NL-16 (Winehaven Mound), Richmond, Contra Costa County8
- CA-CCo-NL-17, Byron, Contra Costa County6
- CA-CCo-NL-18, Jersey Island, Contra Costa County6
- CA-CCo-NL-2, Contra Costa County, California3
- CA-CCo-NL-21, Lafayette, Contra Costa County4
- CA-CCo-NL-23, Lafayette, Contra Costa County4
- CA-CCo-NL-24, Lafayette, Contra Costa County4
- CA-CCo-NL-25, Danville, Contra Costa County2
- CA-CCo-NL-26, Richmond, Contra Costa County2
- CA-CCo-NL-27, Contra Costa County, California6
- CA-CCo-NL-28, Jersey Island, Contra Costa County3
- CA-CCo-NL-3, Brentwood, Contra Costa County8
- CA-CCo-NL-4, Palm Tract, Contra Costa County5
- CA-CCo-NL-6, Alameda County, California11
- CA-CCo-NL-7, Martinez, Contra Costa County2