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1 <br /> NEWS REL EASE <br /> Karen Furst, MD, M.P.H., Health Officer <br /> San Joaquin County Public Health Services <br /> (209) 468-3411 <br /> Date: October 29, 1998 <br /> FOR IMMEDIATE RELEASE <br /> Contact: Karen Furst, M.D., Health Officer <br /> TRACY TIRE FIRE - GENERAL INFORMATION <br /> • Monitoring for smoke constituents continues to be performed by the Air Resources <br /> Board in the area adjacent to the Tracy tire fire site. The monitoring indicates that <br /> overall, particulate levels are what would be expected for this time of year; however, <br /> there are periods of time when the weather conditions allow the smoke from the tire <br /> fire and agricultural fires to be at ground level. <br /> • According to the Air Pollution Control District and the Air Resources Board, <br /> seasonal changes in the weather pattern for this region cause temperature inversion <br /> to form. The temperature inversions lead to an increase in ground level smoke in <br /> the area. So at times the smoke can be detected in Tracy neighborhoods near the <br /> fire. This tends to occur during the night and early morning hours, but may <br /> occasionally occur at other times of the day. <br /> • In addition, according to the Air Resources Board, during this time of year there is <br /> an increase in particulate matter in the atmosphere overall in the San Joaquin Valley. <br /> This is due to a combination of motor vehicle exhaust, agricultural fires, occasional <br /> grass fires, the tire fire and some use of fireplaces. The increased particulate matter <br /> in the atmosphere combined with moisture in the air is the cause of the recent <br /> haziness. <br /> **Continued** <br /> 1601 E. Hazelton Avenue, Stockton CA 95205 <br />