SBCT Final EIS - Govsupport.us

Chapter 3 ⎯ Affected EnvironmentHawaii show a two-season pattern, with a winter season of 7 months (October through April) and asummer season of 5 months (May through September). The summer months generally are warmerand drier than the winter months. Most major storms occur during the winter season. Seasonal variationsin temperature conditions are mild at lower elevations, with daytime temperatures commonlybetween 75 and 85 degrees Fahrenheit (°F) and nighttime temperatures between 65 and 75°F.3.1.10.5 Schofield Barracks Military ReservationNo air quality monitoring stations are close to the SBMP or SBER. The closest ambient air qualitymonitoring station is about 6 miles from SBMR at Pearl City. In recent years, the Pearl City monitoringstation has reported a few instances in which PM 10 levels exceeded the state 24-hour standard, butnot the federal 24-hour standard. These instances of high PM 10 levels have been attributed to fireworksuse during New Year celebrations. The instances of high PM 10 levels at Pearl City are not representativeof conditions at SBMR.Existing emission sources at SBMR include:• A small quarry with gravel processing equipment;• Boiler systems in various buildings;• Generator systems in various buildings for backup power;• Two incinerators for document destruction;• Personal and government vehicle traffic;• Aircraft and helicopter flight operations;• Warehousing and related equipment operations;• Equipment maintenance activities;• Ordnance firing and detonations during training exercises;• Controlled burning of ranges to restrict vegetative fuel growth; and• Unplanned wildfires.The Army operates three automated weather stations at SBMR that are used for monitoring and predictingfire hazard conditions at the SBMR range areas. Weather data from these stations have notbeen fully summarized. Historical data from WAAF show that average daily minimum temperaturesrange from 60°F in January to 69°F in August. Average daily maximum temperatures range from75°F in March to 83°F in September. Precipitation averages 37.9 inches per year, with monthly averageprecipitation ranging from 1.38 inches in July to 5.22 inches in December (WeatherDisc Associates1990). Wind speeds recorded at SBMR generally are light. Wind speeds at the Main Post generallyaverage between 1 and 7 miles per hour (mph); wind speeds at SBER generally average between1 and 8 mph. Maximum wind speeds seldom exceed the 15 mph threshold commonly associated withwind erosion processes.3.1.10.6 Dillingham Military ReservationThere are no air quality monitoring stations close to DMR. The closest air quality monitoring stationsare on the south side of Oahu. Vehicle traffic and aircraft flight operations represent the major Armyemission sources that are present intermittently at DMR. Live-fire training exercises are not conductedat DMR, but blank ammunition and ground-based smoke devices are used in other types oftraining exercises. Army use of the airfield at DMR is rather limited, accounting for about 3 percentof total annual flight operations. DMR sometimes is used as a refueling and rearming location forFebruary 2008 3–80 2/25th SBCT Final EIS