31A - 100 W. MACARTHUR BLVD. - Laserfiche WebLink

Home Browse Search

3. Environmental Setting 3.1 PHYSICAL SETTING AND EXISTING LAND USES The project site is 21,413 square feet with 1,912 square feet of existing floor area. The project site is located at the southwest corner of MacArthur Boulevard and Main Street in the City of Santa Ana, Both MacArthur Boulevard and Main Street are heavily traveled roadway arterials, The project site is adjacent to the MacMain Plaza to the west and condominiums to the south the project site, 3.2 NOISE-SENSITIVE RECEIVERS Certain land uses are particularly sensitive to noise. As specified in the City's General Plan Noise Element, noise-sensitive uses include residential, school, and open space/recreation uses where quiet environments are necessary for enjoyment. The nearest sensitive receivers are residential condominium uses located 61 feet to the south of project site across a parking lot of the MacMain Plaza. Currently, a six feet masonry block wall separates the project site from the parking lot and another 6 feet wall separates the parking lot from the condominiums, 3.3 EXISTING NOISE ENVIRONMENT Noise monitoring was conducted on February 27, 2005 (Sunday) during the hours for which the automated car wash would operate which is 7 AM to 9 PM, Sunday was chosen for measurements because this day would be expected to have the lowest traffic noise and hence this would be the day that any increases in noise from the project would be most noticeable. Noise measurements were conducted in the MacMain parking lot between the project site and the condominiums to the south. The monitoring location is described below and shown in Figure 3-1: . MacMain Parking Lot: Noise levels at this location are relatively low for being in proximity of MacArthur Boulevard and Main Street. These low noise levels are due to the distance of the sound level meter from MacArthur Boulevard and Main Street as well as the presence of a six feet wall which provides noise attenuation for both streets. The noise levels are very low in the early morning hours, increase in the afternoon and decrease in the evening. Ambient noise levels are higher at locations closer to Main Street or MacArthur Boulevard which are the primary sources of noise proximate to the project site. Table 3-1 identifies the monitored ambient noise levels. The noise measurements demonstrate that the ambient noise level is lower than the City's exterior noise standards for various hours of the day. ~ Time Leq Lmax Lmin L(2) L(8) L(25) L(50) 7:00 AM 57 74 47 64 60 56 54 8:00 AM 56 76 45 62 59 56 53 9:00 AM 58 73 46 67 61 58 56 10:00 AM 65 73 54 68 67 66 65 11:00 AM 66 76 63 68 67 66 66 12:00 PM 64 81 51 67 66 65 64 1 :00 PM 63 85 50 71 64 62 60 2:00 PM 62 78 55 68 64 62 60 4:00 PM 64 71 59 68 66 64 63 6:00 PM 59 74 48 64 62 60 56 7:00 PM 56 74 45 62 59 56 54 8:00 PM 55 71 46 63 59 55 53 City's Exterior Noise Standards 75 70 65 60 55 Table 3-1 Morning Peak Hour - Ambient Noise Monitoring Summary (dBA) Tuhnical Noise Study for Mobil Oil Station/Car Wash Expamion The Planning Center March 2005 . Page 12 {!:\Sll A ,\f-O I.OF.\Shdmll)/Jh _,'\'/Ji~Rf/,rJrl-nJ\i/I/_.dfJi. 31Am98