SBCT Final EIS - Govsupport.us
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SBCT Final EIS - Govsupport.us

SBCT Final EIS - Govsupport.us SBCT Final EIS - Govsupport.us

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Chapter 3 ⎯ Affected Environment3.1.11.1 Department of Defense Noise GuidelinesThe DoD began developing noise evaluation programs in the early 1970s. Initial program developmentinvolved the Air Installation Compatible Use Zone (AICUZ) program for military airfields.Early application of the AICUZ program emphasized Air Force and Navy airfields. The Army implementedthe program as the Installation Compatible Use Zone (ICUZ) program by addressing bothairfield noise issues and other major noise sources, such as weapons testing programs and firingranges. Joint Air Force, Army, and Navy planning guidelines were issued in 1978 (DoD 1978). The1978 guidelines use annual average L dn values to categorize noise exposure conditions on military installations.The following three broad noise exposure zones are used as the basis for characterizingvarious land use compatibility conditions:• Zone I—areas with Ldn levels below 65 dBA or 62 “C-weighted” decibel (dBC);• Zone II—areas with Ldn levels of 65 to 75 dB or 62 to 70 dBC; and• Zone III—areas with Ldn levels above 75 dB or 70 dBC.Table 3-2 A-Weighted Decibel Values for Example Noise SourcesCharacterization dBAExample Noise Sourceor ConditionOther Noise ExamplesThreshold of pain 130 Surface detonation, 30 pounds ofTNT at 1,000 feetPossible building damage120 Mach 1.1 sonic boom under aircraftat 12,000 feetAir raid siren at 50 feet; B–1 flyoverat 200 feet115 F/A–18 aircraft takeoff with afterburnerat 1,600 feetCommercial fireworks (5 poundcharge) at 1,500 feet110 Peak crowd noise, pro football game,open stadiumPeak noise at firing position of riflerange100 F/A–18 aircraft departure climb outat 2,400 feetJackhammer at 10 feet; B–52 flyoverat 1,000 feetExtremely noisy 95 Locomotive horn at 100 feet; 2-milerange, foghorn at 100 feetWood chipper processing treebranches at 30 feet8-hour OSHA limit 90 Heavy truck, 35 mph at 20 feet; leafblower at 5 feetPerson yelling at 5 feet; dog barkingat 5 feetVery noisy 85 Power lawn mower at 5 feet; city busat 30 feetPneumatic wrench at 50 feet; jet skiat 20 feetNoisy75 Street sweeper at 30 feet; idling locomotiveat 50 feetBeach with medium wind and surf70 Auto, 35 mph at 20 feet; 300 feetfrom busy 6-lane freewayStream bank 10 feet from small/medium waterfallModerately noisy 65 Typical daytime busy downtown areaconditionsBeach with light wind and surf; treebranches, light wind55 Typical daytime urban residentialarea away from major streetsLeaves, tall grass rustling inlight/moderate wind50 Typical daytime suburban conditions Open field, summer night, insectsQuiet45 Typical rural area daytime conditions40 Quiet suburban area at nightVery quiet30 Quiet rural area, winter night, nowindQuiet bedroom at night, no air conditioner20 Empty recording studio Barren area, no wind, water, insects,or animalsBarely audible 10 Audiometric testing boothThreshold of hearing 0February 2008 3–84 2/25th SBCT Final EIS

Chapter 3 ⎯ Affected EnvironmentThe guidelines indicate that all land uses are compatible with Zone I noise levels. Educational, medical,and residential land uses generally are not compatible with Zone II noise levels unless specialacoustic treatments and designs are used to ensure acceptable interior noise levels. Acoustical insulationalso may be needed for administrative and office facilities located in Zone II areas. Residential,medical, and educational land uses are not compatible with Zone III noise levels. Industrial, manufacturing,and office land uses may be acceptable in Zone III areas if special building designs and othermeasures are implemented.The Army has recently supplemented the original 1978 guidelines to develop a more comprehensiveEnvironmental Noise Management Program (ENMP). The ENMP program incorporates ICUZevaluations as one component of the program. Other components of the ENMP include programs forhandling noise complaints and undertaking supplemental noise evaluations when warranted by the natureof discrete noise events. Criteria for evaluation of noise levels have been expanded beyond thenormal A-weighted L dn descriptor to include the use of C-weighted L dn values to characterize majorblast noise sources and the use of peak unweighted decibel values to characterize small arms firing(Table 3-3). While AR 200–1 identifies the peak unweighted dB value as the method for characterizingnoise from small arms firing, A-weighted L dn values often are used instead as the preferredmethod for assessing land use compatibility issues (Army 2002). USAG-HI will use the ENMP to explorethe following:• Improvements in land use compatibility adjacent and proximal to USAG-HI facilities;• The feasibility of increasing acoustical insulation in structures or areas where noise sensitive receptorsreside, specifically in areas that are or may become exposed to Zone III and Zone II noiseconditions, giving priority to family and troop housing areas affected by Zone III conditions; and• Ways to improve notification to surrounding communities about the scheduling and nature ofnighttime training exercises, which are possible sources of complaints about noise and vehicle activity.While enhanced public information programs will not reduce actual noise levels, they canhelp reduce the frequency of noise complaints.The Army Center for Health Promotion and Preventive Medicine (CHPPM) assists Army installationsin developing environmental noise management plans. CHPPM also undertakes special noise studiesto evaluate noise problems associated with various types of noise sources. When investigating noiseconditions related to weapons firing or ordnance detonations, CHPPM typically measures peak unweighteddecibel levels and/or C-weighted SEL levels. Table 3-3 summarizes the noise criteria mostoften used by CHPPM when evaluating blast noise issues.possibility of damageOver 140 dB Higher than 115 dBC threshold for permanenthearing damage; high riskof physiological and structuraldamage claimsTable 3-3 CHPPM Blast Noise Assessment CriteriaPredicted ImpulseSound LevelPeak Unweighted dB LevelC-Weighted SEL Value Risk of Complaint Recommended ActionLess than 115 dB Lower than 90 dBC low risk of complaint No restrictions115 to 130 dB 90 to 105 dBC moderate risk of complaint Postpone non-critical testsif possible130 to 140 dB 105 to 115 dBC high risk of complaints; Postpone all but extremelyimportant testsPostpone all explosiveoperationsNotes: Source: U.S. Army CHPPM 2001CHPPM normally uses peak unweighted dB measurements to investigate blast noise complaint issues. For rapid-fire test events with majorweapons, noise level criteria should be reduced by 15 dB. C-weighted SEL values often are used to predict the potential for sleep disturbance.February 2008 3–85 2/25th SBCT Final EIS

Chapter 3 ⎯ Affected Environment3.1.11.1 Department of Defense Noise GuidelinesThe DoD began developing noise evaluation programs in the early 1970s. Initial program developmentinvolved the Air Installation Compatible Use Zone (AICUZ) program for military airfields.Early application of the AICUZ program emphasized Air Force and Navy airfields. The Army implementedthe program as the Installation Compatible Use Zone (ICUZ) program by addressing bothairfield noise issues and other major noise sources, such as weapons testing programs and firingranges. Joint Air Force, Army, and Navy planning guidelines were issued in 1978 (DoD 1978). The1978 guidelines <strong>us</strong>e annual average L dn values to categorize noise exposure conditions on military installations.The following three broad noise exposure zones are <strong>us</strong>ed as the basis for characterizingvario<strong>us</strong> land <strong>us</strong>e compatibility conditions:• Zone I—areas with Ldn levels below 65 dBA or 62 “C-weighted” decibel (dBC);• Zone II—areas with Ldn levels of 65 to 75 dB or 62 to 70 dBC; and• Zone III—areas with Ldn levels above 75 dB or 70 dBC.Table 3-2 A-Weighted Decibel Values for Example Noise SourcesCharacterization dBAExample Noise Sourceor ConditionOther Noise ExamplesThreshold of pain 130 Surface detonation, 30 pounds ofTNT at 1,000 feetPossible building damage120 Mach 1.1 sonic boom under aircraftat 12,000 feetAir raid siren at 50 feet; B–1 flyoverat 200 feet115 F/A–18 aircraft takeoff with afterburnerat 1,600 feetCommercial fireworks (5 poundcharge) at 1,500 feet110 Peak crowd noise, pro football game,open stadiumPeak noise at firing position of riflerange100 F/A–18 aircraft departure climb outat 2,400 feetJackhammer at 10 feet; B–52 flyoverat 1,000 feetExtremely noisy 95 Locomotive horn at 100 feet; 2-milerange, foghorn at 100 feetWood chipper processing treebranches at 30 feet8-hour OSHA limit 90 Heavy truck, 35 mph at 20 feet; leafblower at 5 feetPerson yelling at 5 feet; dog barkingat 5 feetVery noisy 85 Power lawn mower at 5 feet; city b<strong>us</strong>at 30 feetPneumatic wrench at 50 feet; jet skiat 20 feetNoisy75 Street sweeper at 30 feet; idling locomotiveat 50 feetBeach with medium wind and surf70 Auto, 35 mph at 20 feet; 300 feetfrom b<strong>us</strong>y 6-lane freewayStream bank 10 feet from small/medium waterfallModerately noisy 65 Typical daytime b<strong>us</strong>y downtown areaconditionsBeach with light wind and surf; treebranches, light wind55 Typical daytime urban residentialarea away from major streetsLeaves, tall grass r<strong>us</strong>tling inlight/moderate wind50 Typical daytime suburban conditions Open field, summer night, insectsQuiet45 Typical rural area daytime conditions40 Quiet suburban area at nightVery quiet30 Quiet rural area, winter night, nowindQuiet bedroom at night, no air conditioner20 Empty recording studio Barren area, no wind, water, insects,or animalsBarely audible 10 Audiometric testing boothThreshold of hearing 0February 2008 3–84 2/25th <strong>SBCT</strong> <strong>Final</strong> <strong>EIS</strong>

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