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*:/ :11-1 h WA <br />NATURAL <br />H ISTORY <br />M U S E U M <br />iaa �neeY.sceunYr <br />PlaceWorks, Inc. <br />3 MacArthur Place, Suite 1100 <br />Santa Ana, CA 92707 <br />Attn: Elizabeth Kim, Senior Associate <br />Natural History Museum <br />of Los Angeles County <br />goo Exposition Boulevard <br />Los Angeles, CA 90007 <br />tel 213-763-3466 <br />Vertebratemf&ontology Section <br />Telephone: (213) 763-3325 <br />e-mait. smcleod@nhm.org <br />15 May 2018 <br />re: Paleontological Records Search for the proposed Two Santa Ana Community Parks Project, <br />in the City of Santa Ana, Orange County, project area <br />Dear Kim: <br />I have conducted a thorough search of our Vertebrate Paleontology records for the <br />proposed Two Santa Ana Community Parks Project, in the City of Santa Ana, Orange County, <br />project area as outlined on the portions of the Newport Beach and Tustin USGS topographic <br />quadrangle maps that you sent to me via e-mail on 1 May 2018. We do not have any vertebrate <br />fossil localities that lie within the proposed project site boundaries, but we do have localities <br />nearby from the same sedimentary units that occur in the proposed project area. <br />Surface sediments throughout the entire proposed project area and in the surrounding <br />vicinity consist of younger terrestrial Quaternary Alluvium, derived primarily as alluvial fan <br />deposits from the hills of the Santa Ana Mountains to the east, broadly via the Santa Ana River <br />that currently flows to the west. These younger Quaternary deposits typically do not contain <br />significant vertebrate fossils, at least in the uppermost layers, but are underlain by older <br />Quaternary deposits at varying depths that do contain significant vertebrate fossils. Our closest <br />vertebrate fossil locality from older Quaternary deposits is probably LACM 1339, south- <br />southwest of the proposed project area sites in Costa Mesa east of the Santa Ana River near the <br />top of the mesa bluffs along Adams Avenue, that produced fossil specimens of mammoth, <br />Mammuthus, and camel, Camelidae, bones from sands approximately 15 feet below the top of the <br />mesa that is overlain by shell bearing silts and sands. A little farther almost due south of the <br />proposed project area site 2, in Costa Mesa along the Newport Freeway near Santa Isabel <br />Avenue, our older Quaternary locality LACM 4219 produced fossil specimens of turtle, <br />Inspiring wonder, discovery and res7.6C. 44 r.2u1nfiral and cultural worlds. <br />