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APPENDIX D2
PALEONTOLOGICAL RECORDS SEARCH
UltraSystems
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2345 Searl Parkway ♦ Hemet, CA 92543 ♦ phone 951.791.0033 ♦ fax 951.791.0032 ♦ WesternScienceCenter.org
January 18th, 2023
Rodrigo Jacobo
UltraSystems Environmental
16431 Scientific Way
Irvine, CA 92618
Dear Mr. Jacobo,
This letter presents the results of a record search conducted for Conco Fontana Warehouse
Project located in the City of Fontana, San Bernardino County California. The project site is
located at 13052 Dahlia Street on Township 1 South, Range 6 West, Section 28 on the Guasti,
CA USGS 7.5” quadrangle.
The geologic units underlying this project are mapped as a mix of alluvial deposits from the
Holocene and late Pleistocene epochs (Morton and Miller 2006). Holocene alluvial units are
considered to be of high preservation value, but material found is unlikely to be fossil material
due to the relatively modern associated dates of the deposits. Pleistocene alluvial units are
considered to be of high preservation value and are likely to contain fossils. The Western
Science Center does not have localities within the project area or within a 1 mile radius.
Any fossil specimens recovered from the Conco Fontana Warehouse Project would be
scientifically significant. Excavation activity associated with the development of the project area
would impact the paleontologically sensitive Pleistocene units, and it is the recommendation of
the Western Science Center that a paleontological resource mitigation program be put in place
to monitor, salvage, and curate any recovered fossils from the study area.
If you have any questions, or would like further information, please feel free to contact me at
bstoneburg@westerncentermuseum.org.
Sincerely,
Brittney Elizabeth Stoneburg, MSc
Collections Manager