1. Noise or Annoyance? Is actual jet noise a problem? Or is the problem only present in complaints?

2. Approaches as portrayed by critics… Actually photographed at the edge of Mather Airport, A300-600F at ~ 150 feet above ground

3. Sanity Checks: How does our situation compare with somewhat similar ones elsewhere? Objective factors Subjective factors

4. Locations of publicly vocal complainers

5. Homeowners reporting no jet noise problem From personal contact while measuring actual noise levels 3 of 3 homeowners contacted at point of Maximum noise in El Dorado Hills 2 of 2

6. Interwoven Issues What sound levels do freighter approaches actually produce on the ground? How much traffic (approaches per day over EDH/Folsom) is there? When? How will these measures change in the future? How do complaints about noise relate to actual noise? What misconceptions are evident in complaints? How do public agencies affect public perception?

8. Mather ILS vertical profile

9. CAMRR 6,500 LDORR 5,000 YOSHE 3,000 Nominal ILS Approach

10. EDH West Ridge 3,900 EDH East Ridge 4,600 Nominal ILS Approach

11. ILS intercept @ LDORR Plus a burst of afternoon traffic

12. VFR approach South of US 50

13. Loudest 2008 freighter approach recorded in WebTrak: Probably about 85 dBA

14. Approach from south By UPS954 plus other Traffic (week before Christmas)

15. Approach Usage Data for the week of December 15 through December 22, 2008 -- The week before Christmas, busiest freight week of the year

16. Approach Noise Exposure Potential Data for the week of December 15 through December 22, 2008 -- The week before Christmas, busiest freight week of the year

17. Overflight Noise Measurement Measurements on SierraFoot.org use Lmax, the maximum noise level SEL/SENEL – Oakland, Foster City Lmax, Oakland, Foster City SEL/SENEL, EDH West Ridge Lmax, EDH West Ridge

18. Actual Crossing Altitudes on ILS at Initial Approach Fix Rescue area, north of Shingle Springs

19. Actual Crossing Altitudes on ILS at El Dorado Hills west ridge

22. Measured Noise

25. Approaches per day and Noise-Number Index for Annoyance

26. NNI Annoyance & Complaint Rate EDH CSDEDH West RidgeFoster City NNI – Noise/Number Index 7.311.746.2 Complaints per 1,000 approaches 1,9192.2 NNI is the first widely accepted index of annoyance due to exposure to jet noise, adopted by the British more than 40 years ago. Published literature, including documents cited by www.keepthepeace.org, indicate that NNI less than 35www.keepthepeace.org corresponds to insufficient annoyance to produce complaints. Values somewhat above, such as Foster City‘s 46.2, are expected to produce sporadic complaints. This table reports a composite complaint rate for Mather-correlated complaints from Folsom, El Dorado Hills, Rescue, and Shingle Springs. All complaint counts are from the first 7 months of 2008.

27. Can a single serial complainer dominate complaint statistics? Yes -- Here’s an example from LAX, July 2008:

28. Serial Complainers & MHR Noise complaint statistics correlated with Mather flights also show highly disparate rates depending on the location of complainers. Average monthly complaints : 45 per Folsom caller, 12 per EDH caller

29. Serial Complainers & SMF Location-specific complaints also apply to noise attributed to flights to and from Sacramento International Airport. Average monthly complaints: 33 per Folsom caller, 8 per EDH caller

30. MHR serial complaints by community Complaint percentage distribution for SMF is similar, ± 6% per community

31. SMF serial complaints by community Complaint percentage distribution for MHR is similar, ± 6% per community

32. Populace in general Most people in the EDH/Folsom area think we have problems with jets flying too low and too loud. The main exceptions are those who live directly under the ILS approach, who generally indicate no problem exists. The public understanding derives mainly from public dialog and media news coverage. Public agency treatment of the issue as a noise problem has carried strong influence – especially in connection with the City of Folsom‘s law 2007 law suit.

33. Public discourse and public policy determine public perception. If public agencies treat something as a problem the public perceives it as a problem.