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WELCOME! Policy Advisory Committee (PAC) Meeting July 23, 2003

WELCOME! Policy Advisory Committee (PAC) Meeting July 23, 2003. FIRST PUBLIC INFORMATIONAL MEETING. Held July 9 th at Randolph Clubhouse Approximately 130 People Attended Explained Process Provided Opportunity for Input on Issues Answered Questions Well Covered by Media.

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WELCOME! Policy Advisory Committee (PAC) Meeting July 23, 2003

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  1. WELCOME! Policy Advisory Committee (PAC) Meeting July 23, 2003

  2. FIRST PUBLIC INFORMATIONAL MEETING • Held July 9th at Randolph Clubhouse • Approximately 130 People Attended • Explained Process • Provided Opportunity for Input on Issues • Answered Questions • Well Covered by Media

  3. TASK 2 BRIEFING PAPER UPDATE • Comments Received from PAC Members • Reviewing Comments and Updating Paper Based on Comments Received • Will Continue to Update Through Remainder of Study • Briefing Paper is Interim Working Document • Contents Will Be Incorporated Into Final Report

  4. COMPATIBILITY CRITERIA • Avoid concentrations of people exposed to noise and safety hazards • Noise Criteria: • Limit exposure of people and noise-sensitive activities to high noise levels • Safety Criteria: • Limit concentrations of people and safety- sensitive activities in areas of highest probable accident impact

  5. NOISE CRITERIA • Typical Background Sound Levels • Suburban Residential Neighborhood – 35 to 45 db • Office (Interior) – 40 to 50 db • Traffic – 70 to 85 db • Normal Conversation – 60 db

  6. NOISE CRITERIA • Noise Sensitive Activities • Residences and places where people normally sleep, such as hospitals and hotels • Institutional land uses such as schools, libraries, and churches where it is important to avoid interference with such activities as speech, meditation, and concentration on reading material • Uses where quiet is important, such as medical offices, concert halls, cemeteries, monuments, and museums • Outdoor activities where conversation or quiet is important

  7. NOISE CRITERIA • Alternative 1 • Prohibit noise-sensitive uses in zones above 65 ldn • Require sound attenuation for effects of external noise on other indoor activities (indoor level of 45 ldn) • Notes to Table: • 1. With appropriate sound attenuation so that indoor sound levels attributable to exterior sources shall not exceed an Ldn of 45 decibels (dBA) in any habitable area

  8. NOISE CRITERIA • Alternative 2 • Prohibit noise- sensitive uses in zones above 60 db • Require sound attenuation for effects of external noise on other indoor activities (indoor level of 45 db) • Notes to Table: • 1. With appropriate sound attenuation so that indoor sound levels attributable to exterior sources shall not exceed an Ldn of 45 decibels (dBA) in any habitable area; normal construction provides a reduction of 20 to 25 decibels

  9. NOISE CRITERIA • Option 1 • Use 2003 AICUZ Noise Contours

  10. NOISE CRITERIA • Option 2 • Use Notional (Hypothetical) Noise Contours

  11. SAFETY CRITERIA • Risk • The potential for realization of unwanted, adverse consequences to human life, health, property, or the environment; estimation of risk is usually based on the expected value of the conditional probability of the event occurring times the consequence of the event given that it has occurred. Source: The Society for Risk Analysis, Risk Glossary

  12. SAFETY CRITERIA • In Areas of Most Likely Accident Impact • Avoid Uses with Concentrations of People • Residences and similar uses where people reside, such as hospitals and hotels • Employment locations with high density (e.g. offices) • Places where people may gather in large numbers (e.g. shopping centers, auditoriums, recreation areas) • Avoid Uses with Special Safety Considerations • Uses involving hazardous materials or explosives • Critical public health and safety uses (e.g. hospitals, fire stations, police communication facilities)

  13. SAFETY CRITERIA • USAF World-Wide Accident Data • All aircraft types • 1985 – 2000 • Class A accidents (greater than $1M damage, fatality, total loss of aircraft) • Data available only up to 40,000 ft from end of runway)

  14. SAFETY CRITERIA • USAF World-Wide Accident Data • All aircraft types • 1985 – 2000 • Class A accidents (greater than $1M damage, fatality, total loss of aircraft) • Data available only up to 40,000 ft from end of runway

  15. SAFETY CRITERIA • Alternative 1 • Allow low-intensity employment uses in APZs and Paddle • Graduated density with longitudinal distance (5 to 15 People per acre)

  16. SAFETY CRITERIA • Alternative 2 • Allow low-intensity employment uses in APZs and “Center” Paddle • Graduated density with longitudinal distance from runway end (4 to 15 people per acre) • Graduated density (up to 40 people per acre) and additional uses with horizontal distance from centerline

  17. SAFETY CRITERIA • Split Paddle • “Center” Paddle is 5000 ft. wide (2,500 ft on each side of centerline) • Side Paddles are balance of Paddle

  18. COMPATIBILITY CRITERIA Discussion

  19. NEXT STEPS • Task 3 and 4 Briefing Paper • Next PAC Meeting – August 20th • Second Public Information Meeting • September 23rd • 5:00 p.m. to 7:00 p.m. • Location to be Announced • Other?

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