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75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW
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75C - PH - BRISTOL EIR FROM WARNER TO ST. ANDREW
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Last modified
4/8/2015 3:32:45 PM
Creation date
4/2/2015 4:21:45 PM
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City Clerk
Doc Type
Agenda Packet
Agency
Public Works
Item #
75C
Date
4/7/2015
Destruction Year
2020
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The construction noise impacts to the surrounding community could be <br />significant, albeit short -lived. Residences, schools and other noise - sensitive <br />land uses are most likely to be adversely affected by construction- related noise. <br />Construction activities will take place only during daytime hours to avoid <br />evening and nighttime noise nuisances and minfi i impacts to residential <br />properties. Noise will subside to normally expected levels once construction is <br />complete. <br />While the impact of project construction activities upon ambient air quality is <br />considered to be insignificant, the localized effects of fugitive dust and odors <br />may present a nuisance to adjacent properties during the period of <br />construction. Large dust particles (30 -100 microns in diameter) that may settle <br />to earth within a few hundred feet of the construction area could create a _ <br />temporary localized nuisance problem. Additionally, fine- grained particulates <br />(less than 30 microns in size) may be emitted and dispersed over greater <br />distances, occasionally annoying adjacent receptors, especially during Santa <br />Ana wind conditions. Dt1st generation is usually only a problem in <br />construction activities which involve substantial site grading or require vehicles <br />to travel over unpaved roadways. Construction of the proposed project should <br />require very little earth movement at any one location and virtually no travel <br />over unpaved roadways. Dust generation is expected to be minimal. �^ <br />Diesel construction equipment constitutes approximately 90 percent of the <br />heavy construction machinery in use today. It emits on the average about one- <br />half pound of NOx (and smaller amounts of CO and THC) for each gallon of <br />fuel burned (EPA, AP -42). Construction equipment emission rates on very <br />active days may total several hundred pounds of contaminants per hour. The <br />concentration of carbon soot in the exhaust of diesel engines makes the smoke <br />plume highly visible and acts as a minor contributor to the nuisance caused <br />by particulates. The odor associated with diesel emissions is believed to be <br />caused by combinations of unburned fuel and a 'number of various chemicals _ <br />in the exhaust gas. Exhaust emissions during the construction activities will <br />vary from day -to -day as construction activity levels change but should be <br />minimal and dispersed without significant impact on sensitive receptors, w <br />The construction activities required to widen the roadway may temporarily <br />restrict traffic flow along Bristol Street. While the roadway will remain open _ <br />to through traffic, the number of available travel lanes will probably be <br />reduced during various phases of construction, thereby reducing the capacity <br />and efficiency of the roadway. For this reason, the volume of traffic which <br />Bristol Street can handle efficiently will be decreased during the period of <br />project construction. Since this would result in an increase in travel time <br />along Bristol Street, some motorists will probably choose to take an alternative <br />route when convenient. Access to property fronting along Bristol Street will <br />also be intermittently disrupted as work progresses adjacent to individual <br />IV -78 <br />75C -213 <br />w <br />
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