APPENDIX I
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Project: Murietta Hot Springs at Jefferson
Construction Noise Impact on Sensitive Receptors
Parameters
Construction Hours: Daytime hours (7 am to 7 pm) 8
Evening hours (7 pm to 10 pm) 0
Nighttime hours (10 pm to 7 am) 0
Leq to L10 factor 3
Receptor (Land Use)
Distance
(feet) Shielding Direction
1 Hotel 540 0 E
2 Hotel 570 0E
3 Single-Family Residential 750 0W
RECEPTOR 1 RECEPTOR 2 RECEPTOR 3
Construction Phase Equipment Type
No. of
Equip.
Acoustical
Usage
Factor
Reference
Noise Level at
50ft per Unit,
Lmax
Noise Level
at Receptor
1, Lmax
Noise Level
at Receptor
1, Leq
Noise Level
at Receptor
2, Lmax
Noise Level
at Receptor
2, Leq
Noise Level
at Receptor
3, Lmax
Noise Level
at Receptor
3, Leq
Site Preparation
Tractor 4 40% 84 69.4 65.4 68.9 64.9 66.5 62.5
Dozer 3 40% 82 65.8 61.8 65.3 61.4 62.9 59.0
Combined LEQ 67.0 66.5 64.1
Grading
Excavator 2 40% 81 63.0 59.1 62.6 58.6 60.2 56.2
Grader 1 40% 85 64.3 60.4 63.9 59.9 61.5 57.5
Scraper 2 40% 84 65.9 62.0 65.5 61.5 63.1 59.1
Tractor 2 40% 84 66.3 62.4 65.9 61.9 63.5 59.5
Dozer 1 40% 82 61.0 57.1 60.6 56.6 58.2 54.2
Combined LEQ 67.6 67.1 64.7
Building Construction
Crane 1 16% 81 59.9 52.0 59.5 51.5 57.1 49.1
All Other Equipment > 5 HP 3 50% 85 69.1 66.1 68.6 65.6 66.2 63.2 Generator 1 50% 81 59.9 56.9 59.5 56.5 57.1 54.1
Tractor 3 40% 84 68.1 64.1 67.6 63.7 65.2 61.3
Welder/Torch 1 40% 74 53.3 49.4 52.9 48.9 50.5 46.5
Combined LEQ 68.7 68.2 65.8
Paving
Paver 2 50% 77 59.5 56.5 59.1 56.1 56.7 53.7
All Other Equipment > 5 HP 2 50% 85 67.3 64.3 66.9 63.9 64.5 61.5 Roller 2 20% 80 62.3 55.4 61.9 54.9 59.5 52.5
Combined LEQ 65.4 65.0 62.6
Architectural Coating
Compressor (air) 1 40% 78 57.0 53.1 56.6 52.6 54.2 50.2 Combined LEQ 53.1 52.6 50.2
Source for Ref. Noise Levels: RCNM, 2005