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RESPONSE TO COMMENTS FOR CRAZY HORSE SQUARE MITIGATED NEGATIVE DECLARATION ER-2004-109 FROM AIRPORT LAND USE COMMISSION 1. The project description should include the proposed project height above mean sea level (AMSL). It is also suggested that a reference to building height (AMSL) be included in Section VII.D. Hazardlhazardous Materials, and Section XV.C. Transportation! Traffic. RESPONSE So noted. All future references to height will be made in above mean sea level (AMSL) as well as in feet and inches. The project is 28 feet tall at its highest point. The above mean sea level elevation is 62 feet, calculated using NA VD 88 datum. 2. With regards to noise impacts, the initial study discusses the project's location in Noise Impact Zone 2 and states "The project is subject to Uniform Building Code requirements which would include California Noise Insulation Standards to achieve appropriate interior noise levels for the mix of land uses proposed for the project. Please identify what the interior noise level standard would be. RESPONSE The Crazy Horse Square Project is located in Noise Impact Zone 2 (60 dB CNEL or greater, less than 65 dB CNEL). The City of Santa Ana uses the California Building Code, 2001 edition when plan checking building projects. According to the Building Department's Senior Plan Check Engineer, the Cities noise ordinance applies to residential development and the City has not adopted interior noise standards for commercial projects. Generally, a 15 dB to 20 dB drop down in decibel level is achieved between exterior and interior noise levels using conventional construction methods, so it is likely that the interior noise levels of the proposed retail and restaurant buildings will achieve the 45 dB level. The three structures will be constructed in accordance with normal City codes and standards and conventional construction methods as dictated by the California Building Code, 2001 edition. 3. If the development of HeliportslHelistops will be permitted at this project site, the initial study should address compliance with the AELUP for Heliports incorporating the following language into the document. "The City will ensure that each applicant, seeking a Conditional Use Permit or similar approval for the construction or operation of a heliport or helistop, complies fully with the state permit procedure provided by law and with all conditions of approval imposed or recommended by the Federal Aviation Administration (FAA), by the Airport Land Use Commission for Orange County (ALUC) and by 1 75A-164