Exhibit 4-5_55A_HPSR - Laserfiche WebLink

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AREA P EH7ST RY ANV HISTORY. PALEONTOLOGY; The fallowing section of this report ryas prepared by Mr. Rodney E. R aschke, ar) Orange County Certified Paleontologist. A review of the latest published geological map of the area reveal- ed that Bristol Street between Warner Avenue and First Street is under- lain by Quaternary Aalluvium (;forton et al. 1973). These deposits were laid down by the Santa Ana river. Typically these deposits are less than 10,000 years old, which iriakt3s them geologically too young to contain important fossils. There are no confirmed reports of fossils from these deposits in the Santa Ana area_ There are unconfirMed questionable reports of the remains of "Ice Age" animals supposedly recovered Fron7 thi2 alluviul depos.!Ls, However, no fossils are currently available to support these reports. Quaternary alluvium is considered to have a low paleonntological sensitivity or potential for the discovery of fossils during the develop- ment of an area underlain by these deposits. Based on the low paleontological sensitivity of the rock unit exposed in the Bristol Street area afid the shallow nature of the excavations as- sociated witfr the proposed project it is unlikely that there will be any adverse impact on the paleontological resources in the Santa Ana area. Therefore, no paleontological monitoring will be necessary during the widening of Bristol Street between, First Street and Darner Avenue. The above evaluation is based on a review of the published and un- published geological and paleontological literature of the area and the locality records of the Natural History Museum of Los Angeles County and 11