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domena royal Geology and Soils The soils and geology section of the Initial Study will be prepared based on studies and documentation generally available from the City. Hazards and Hazardous Materials This section of the Initial Study will be based primarily on the Phase I ESAs previously prepared for the NEPA document. Hydrology and Water Quality Both sites are flat and located in urbanized areas. The existing storm drain systems in these locations will be noted and plans for connecting to such systems will be reviewed along with best management water quality requirements. Noise and Vibration PlaceWorks will prepare a noise and vibration analysis for construction and operational activities associated with providing replacement park property currently leased by Santa Ana College at the Centennial Regional Park (CRP). Our basic premise is that such replacement parkland will be secured and that the college activities at the CRP will not substantially change. The analysis will be incorporated into the environmental documents under both CEQA and NEPA (with the National Park Service [NPSj as the Federal Agency). The noise analyses will be consistent with the noise standards and criteria of the City of Santa Ana, the State of California, and the U.S. National Park Service. Specifically, the primary technical assessment driver will be NPS' NEPA Handbook (2015) and related Supplemental Guidance publications (Sept 2015). The project consists of various clearing/prepping activities at one or more sites, followed by construction of new, passive and active park facilities. The sites are generally surrounded by single-family and multi -family residential land uses which would provide the patrons to the parklands. These new park sites are assumed to be accessed primarily via local pedestrian or bicycle traffic and would, thus, not be associated with large amounts of motorized vehicle traffic. PlaceWorks will describe the existing environment setting within the vicinity; including an examination of the current regulatory framework (Le., existing policies, regulation, and ordinances). PlaceWorks will assess existing conditions and Identify the major noise sources in the vicinity of the project site, the nearest sensitive receptors, and other pertinent community characteristics; based on aerial photography, site plans, and project site photos. From on initial Investigations, the area around the project sites appear to be a built -out, urbanized part of the city, As such, no notable changes in traffic flows — or the associated traffic noise levels — are anticipated and a qualitative assessment of traffic noise increases (due to the project implementation) will be made; in coordination with our in-house traffic assessment team members. Therefore, no field assessment of existing noise levels is warranted. PlaceWorks will conduct an assessment of potential noise and vibration impacts during the construction of the proposed project; with particular attention on possible disruption effects at adjacent properties, Noise generated by each construction phase will be estimated based on the construction equipment matrix, the durations of activities, and the projected haul truck traffic; all to be provided by the city staff and/or their contractor(s). Since the use of the proposed outdoor activity areas is not envisioned to be notably different than current conditions, long-term operational noise impacts will be addressed qualitatively. November 27, 2017 1 Page 7