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City of Santa Ana Environmental Checklist existing structures on site were constructed between 1927 and 1962 and did not require substantial excavation for development. A cultural resources records search at the South Central Coastal Information Center did not identify any archaeological resources within the project area or within a 0.5-mile radius of the project area, and no previous studies included the project site. Based on the preliminary research of the project area, the potential sensitivity for prehistoric archaeological and paleontological remains is low and for historical archaeological remains is moderate. An archaeological site survey was not conducted for this project because the project parcel is developed and covered in asphalt, concrete, ornamental landscaping, and a gravel parking area. Construction of the proposed building foundation will require five feet of over-excavation of soils below the existing grade under and outside of the proposed structure's footprint. Additionally, grading and over-compaction of soils would be required to even the site prior to construction. Because the site has not previously been excavated or studied for cultural resources, there is potential for subsurface artifacts. Hence, it is possible buried unknown archaeological materials could be unearthed during excavation and trenching activities associated with the proposed project. Therefore, construction of the proposed project may have the potential to disturb and destroy an unknown buried archaeological resource. Disturbance of any unknown buried archaeological resources could result in an adverse impact. Therefore, implementation of Mitigation Measure CR-1 would reduce the potentially significant impact to a less-than-significant level. Mitigation Measure CR-1: During grading excavation and trenching, a qualified professional archaeologist will be present to monitor the ground-disturbing activities. If buried cultural resources are discovered during ground-disturbing activities, work will stop in that area and within 50 feet of the find until a qualified archaeologist can assess the significance of the find and, if necessary, develop appropriate treatment measures. Treatment measures typically include development of avoidance strategies or mitigation of impacts through data recovery programs such as excavation or detailed documentation. If during cultural resources monitoring the qualified archaeologist determines that the sediments being excavated are previously disturbed or unlikely to contain significant cultural materials, the qualified archaeologist can specify that monitoring be reduced of- eliminated. c. Directly or Indirectly destroy a unique paleontological resource or site or unique geologic feature? Less-than-Significant Impact with Mitigation Incorporated, As described above, the project area does not contain any documented cultural resources; however, no known paleontological studies have been conducted onsite. The geologic map of the site shows that the project area is located within a broad flat alluvium/colluvium area, and the Soil Report (Appendix B) identifies silty fine sand and silty clay underlying the project site. Historical high groundwater elevations below the projectsite are as shallow as four feet bgs, but were measured at nine feet bgs by the Soils Study prepared for the project. Given the geology of the project area, it is unlikely that unknown paleontological resources exist because the young surface sediments consisting of alluvium and colluvium onsite do not typically contain paleontological resources. Further, Lite proposed project would require minimal grading and a maximum excavation of approximately five feet below the existing grade. Therefore, there is a low likelihood that paleontological resources would be encountered during construction. However, because the site has not previously been excavated and or studied for paleontological resources, there is potential for subsurface resources. Hence, it is possible buried unknown paleontological The Bat Nha Buddhist Meditation Center 3-31 June 2013 Initial Study/Mitigated Negative Declaration icf 00215.12 31 C-84