Laserfiche WebLink
Harbor Boulevard Mixed Use Transit Corridor Plan <br />Findings and Facts in Support of Findings and Statement of Overriding Considerations <br />Mitigation Measures <br />MM 9 -3 Prior to issuance of a building permit, applicants for projects within <br />the Harbor Corridor Plan that involve high- vibration construction <br />activities, such as pile driving or vibratory rolling /compacting, shall <br />be evaluated for potential vibration impacts to nearby sensitive <br />receptors. The project developer shall submit a vibration report <br />prepared to the satisfaction of the City of Santa Ana Building <br />Official or their designee to determine if the use of pile driving <br />and /or vibratory rolling /compacting equipment would exceed the <br />Federal Transit Administration's (FTA's) vibration - annoyance <br />criteria of 78 VdB during the daytime or FTA's vibration - induced <br />architectural damage PPV criteria of 0.2 inches /second for wood - <br />framed structures or 0.5 inches /second for reinforced masonry <br />buildings. The construction contractor shall require the use of <br />lower- vibration - producing equipment and techniques. Examples of <br />lower- vibration equipment and techniques would include avoiding <br />the use of vibratory rollers near sensitive areas and /or the use of <br />drilled piles, sonic pile driving, or vibratory pile driving (as opposed <br />to impact pile driving). <br />(4) Potential Impact: Construction activities would result in temporary noise increases <br />in the vicinity of the proposed project. <br />Finding: 1. The City hereby makes Finding 1 and determines that this impact is less <br />than significant with the incorporation of the proposed mitigation measures. <br />Facts in Support of Finding <br />Construction of individual developments associated with buildout of the Harbor <br />Corridor Plan would temporarily increase the ambient noise environment at nearby <br />existing and future residential areas, churches, and parks. At each individual <br />receptor, the temporary increase would likely last for a few months. Even upon <br />compliance with time -of -day constraints established in the City's Municipal Code, <br />construction activities associated with any individual development may occur in close <br />proximity to noise - sensitive receptors, and noise disturbances may occur for <br />prolonged periods of time. The specific locations, duration, and equipment required <br />for individual projects are unknown. Mitigation Measures 9 -4 and 9 -5 require that <br />project applicants employ specific construction noise reduction strategies and <br />prepare a construction management plan that requires implementation of additional <br />noise reduction strategies. Compliance with these measures would reduce this <br />impact to less than significant. <br />Mitigation Measures <br />MM 9 -4 Prior to issuance of grading permits, the project applicant shall <br />ensure the following notes are included on the grading plan cover <br />sheet, and the construction contractor shall comply with these <br />measures during the duration of all construction activities. <br />36 July 2014 <br />