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Section 5 <br />With the construction of the sound walls, the construction of the monitoring well <br />would result in noise levels that would range frorn a 0.1 dB increase to an 11.9 <br />dB increase. As shown in Table 69, the construction activity would exceed the <br />night time noise standard at Receptors 18 by less than 1 dB, The construction <br />activity would occur at night when school is not session at Godinez High School. <br />Because no sensitive receptors would be present potential noise impacts would <br />be less than significant. <br />Monitoring Well Development <br />The noise levels generated during well development of the monitoring well are <br />shown in Table 70 and Table 71. The well development activities would occur 24 <br />hours seven days a week over an 8 day period. Additionally, test engines utilized <br />in the well development of the monitoring well would be required to operate 12 to <br />24 hours a day to Simulate well operations. The duration of engine testing would <br />be 6 days for 12 hours and 1 day for 24 hours, <br />Table 70, Monitoring Well Development Day Time Noise levels <br />Receiver <br />Descriptlon <br />Existing <br />Existing + <br />'Ingresse, <br />Thilroslill <br />Construotion <br />I <br />Multi Family west <br />41.8 <br />421 <br />03 <br />55,0 <br />Santa Ana River <br />Multi Family west <br />61.9 <br />62,0 <br />0.1 <br />64.9 <br />Santa Ana River <br />3 <br />Single Family north <br />65e <br />65.6 <br />0.0 <br />68.6 <br />Edinger Ave. <br />4 <br />Single Family north <br />64 A <br />64.4 <br />0.0 <br />67.6 <br />Edinger Ave. <br />5 <br />Single Family north <br />64.7 <br />647 <br />0,0 <br />67.7 <br />Edinger Ave. <br />6 <br />Single family north <br />71.7 <br />71.7 <br />0,10 <br />74.7 <br />Edinger Ave. <br />7 <br />Single family north <br />676 <br />67,6 <br />0,0 <br />70,6 <br />Edinger Ave. <br />6 <br />Multi Family north <br />68.2 <br />68.2 <br />0,0 <br />Edinger Ave. <br />9 <br />North Centennial <br />59.5 <br />59.5 <br />0.0 <br />62.5 <br />Education Center <br />10 <br />Southeast Centennial <br />54.8 <br />54.8 <br />0,0 <br />55 <br />Education Center <br />11 <br />Single Family east <br />71,8 <br />71.8 <br />0.0 <br />748 <br />Fairview Street <br />12 <br />Single Family east <br />71.3 <br />71.3 <br />0 <br />Fairview Street <br />13 <br />Single Family east <br />71.3 <br />71.3 <br />0 <br />Mid Basin, Centennial Park Injection Well Project Final EIR 5-196 <br />25C-297 <br />