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Home My WebLink AboutAir PM Results November 2024Friday, November 1, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/01/2024 8 AM Matter • 11 Level of Concern Good Hangar Fenceline - E Side 11/01/2024 8 AM 12 Good Hangar Fenceline - N Center 11/01/2024 8 AM 12 Good Hangar Fenceline - N Corner 11/01/2024 8 AM 8 Good Hangar Fenceline - NE Corner 11/01/2024 8 AM 14 Good Hangar Fenceline - NE Side 11/01/2024 8 AM 10 Good Hangar Fenceline - S Corner 11/01/2024 8 AM 10 Good Hangar Fenceline - S Side 11/01/2024 8 AM 13 Good Hangar Fenceline - SW Corner 11/01/2024 8 AM 14 Good Hangar Fenceline - SW Side 11/01/2024 8 AM 9 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/01/2024 8 AM Particulate Matter • 7 Level of Concern Good Legacy Road 11/01/2024 8 AM 13 Good Moffett and Tustin Ranch 11/01/2024 8 AM 11 Good Valencia and Armstrong 11/01/2024 8 AM 26 Good Valencia and Columbus Square 11/01/2024 8 AM 13 Good Valencia and Legacy 11/01/2024 8 AM 14 Good Victory and Tustin Ranch Rd. 11/01/2024 8 AM 15 Good Warner Avenue 11/01/2024 8 AM 13 Good Warner and Armstrong 11/01/2024 8 AM 14 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Saturday, November 2, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction. Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/02/2024 8 AM Matter • ** Level of Concern ** Hangar Fenceline - E Side 11/02/2024 8 AM 18 Good Hangar Fenceline - N Center 11/02/2024 8 AM 20 Good Hangar Fenceline - N Corner 11/02/2024 8 AM 13 Good Hangar Fenceline - NE Corner 11/02/2024 8 AM 22 Good Hangar Fenceline - NE Side 11/02/2024 8 AM 15 Good Hangar Fenceline - S Corner 11/02/2024 8 AM 16 Good Hangar Fenceline - S Side 11/02/2024 8 AM 21 Good Hangar Fenceline - SW Corner 11/02/2024 8 AM 23 Good Hangar Fenceline - SW Side 11/02/2024 8 AM 16 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/02/2024 8 AM Particulate Matter • 14 Level of Concern Good Legacy Road 11/02/2024 8 AM 19 Good Moffett and Tustin Ranch 11/02/2024 8 AM 16 Good Valencia and Armstrong 11/02/2024 8 AM 36 Good Valencia and Columbus Square 11/02/2024 8 AM 21 Good Valencia and Legacy 11/02/2024 8 AM 20 Good Victory and Tustin Ranch Rd. 11/02/2024 8 AM 22 Good Warner Avenue 11/02/2024 8 AM ** ** Warner and Armstrong 11/02/2024 8 AM 29 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Mq Hazardous 425 to 504 Health warning of emergency conditions: ever• • - likely • be affected. Sunday, November 3, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction. Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/03/2024 8 AM Matter • 11 Level of Concern Good Hangar Fenceline - E Side 11/03/2024 8 AM 12 Good Hangar Fenceline - N Center 11/03/2024 8 AM 13 Good Hangar Fenceline - N Corner 11/03/2024 8 AM 8 Good Hangar Fenceline - NE Corner 11/03/2024 8 AM 14 Good Hangar Fenceline - NE Side 11/03/2024 8 AM 9 Good Hangar Fenceline - S Corner 11/03/2024 8 AM 9 Good Hangar Fenceline - S Side 11/03/2024 8 AM 12 Good Hangar Fenceline - SW Corner 11/03/2024 8 AM 15 Good Hangar Fenceline - SW Side 11/03/2024 8 AM 10 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/03/2024 8 AM Particulate Matter • 8 Level of Concern Good Legacy Road 11/03/2024 8 AM 13 Good Moffett and Tustin Ranch 11/03/2024 8 AM 9 Good Valencia and Armstrong 11/03/2024 8 AM 21 Good Valencia and Columbus Square 11/03/2024 8 AM 13 Good Valencia and Legacy 11/03/2024 8 AM 12 Good Victory and Tustin Ranch Rd. 11/03/2024 8 AM ** ** Warner Avenue 11/03/2024 8 AM 11 Good Warner and Armstrong 11/03/2024 8 AM 18 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Mq Hazardous 425 to 504 Health warning of emergency conditions: ever• • - likely • be affected. Monday, November 4, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/04/2024 8 AM Matter • 10 Level of Concern Good Hangar Fenceline - E Side 11/04/2024 8 AM 11 Good Hangar Fenceline - N Center 11/04/2024 8 AM 11 Good Hangar Fenceline - N Corner 11/04/2024 8 AM 7 Good Hangar Fenceline - NE Corner 11/04/2024 8 AM 12 Good Hangar Fenceline - NE Side 11/04/2024 8 AM 8 Good Hangar Fenceline - S Corner 11/04/2024 8 AM 8 Good Hangar Fenceline - S Side 11/04/2024 8 AM 12 Good Hangar Fenceline - SW Corner 11/04/2024 8 AM 11 Good Hangar Fenceline - SW Side 11/04/2024 8 AM 8 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/04/2024 8 AM Particulate Matter • 5 Level of Concern Good Legacy Road 11/04/2024 8 AM 10 Good Moffett and Tustin Ranch 11/04/2024 8 AM 10 Good Valencia and Armstrong 11/04/2024 8 AM 23 Good Valencia and Columbus Square 11/04/2024 8 AM 11 Good Valencia and Legacy 11/04/2024 8 AM 12 Good Victory and Tustin Ranch Rd. 11/04/2024 8 AM 13 Good Warner Avenue 11/04/2024 8 AM 11 Good Warner and Armstrong 11/04/2024 8 AM 8 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Tuesday, November 5, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/05/2024 8 AM Matter • 8 Level of Concern Good Hangar Fenceline - E Side 11/05/2024 8 AM 7 Good Hangar Fenceline - N Center 11/05/2024 8 AM 8 Good Hangar Fenceline - N Corner 11/05/2024 8 AM 4 Good Hangar Fenceline - NE Corner 11/05/2024 8 AM 4 Good Hangar Fenceline - NE Side 11/05/2024 8 AM 7 Good Hangar Fenceline - S Corner 11/05/2024 8 AM 5 Good Hangar Fenceline - S Side 11/05/2024 8 AM 9 Good Hangar Fenceline - SW Corner 11/05/2024 8 AM 7 Good Hangar Fenceline - SW Side 11/05/2024 8 AM 5 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/05/2024 8 AM Particulate Matter • ** Level of Concern ** Legacy Road 11/05/2024 8 AM 5 Good Moffett and Tustin Ranch 11/05/2024 8 AM 7 Good Valencia and Armstrong 11/05/2024 8 AM 14 Good Valencia and Columbus Square 11/05/2024 8 AM 4 Good Valencia and Legacy 11/05/2024 8 AM 8 Good Victory and Tustin Ranch Rd. 11/05/2024 8 AM 10 Good Warner Avenue 11/05/2024 8 AM 6 Good Warner and Armstrong 11/05/2024 8 AM 8 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Mq Hazardous 425 to 504 Health warning of emergency conditions: ever• • - likely • be affected. Wednesday, November 6, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/06/2024 8 AM Matter • 12 Level of Concern Good Hangar Fenceline - E Side 11/06/2024 8 AM 15 Good Hangar Fenceline - N Center 11/06/2024 8 AM 14 Good Hangar Fenceline - N Corner 11/06/2024 8 AM 10 Good Hangar Fenceline - NE Corner 11/06/2024 8 AM 13 Good Hangar Fenceline - NE Side 11/06/2024 8 AM 11 Good Hangar Fenceline - S Corner 11/06/2024 8 AM 9 Good Hangar Fenceline - S Side 11/06/2024 8 AM 14 Good Hangar Fenceline - SW Corner 11/06/2024 8 AM 13 Good Hangar Fenceline - SW Side 11/06/2024 8 AM 8 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/06/2024 8 AM Particulate Matter • 5 Level of Concern Good Legacy Road 11/06/2024 8 AM ** ** Moffett and Tustin Ranch 11/06/2024 8 AM 11 Good Valencia and Armstrong 11/06/2024 8 AM 25 Good Valencia and Columbus Square 11/06/2024 8 AM 15 Good Valencia and Legacy 11/06/2024 8 AM 23 Good Victory and Tustin Ranch Rd. 11/06/2024 8 AM 15 Good Warner Avenue 11/06/2024 8 AM 13 Good Warner and Armstrong 11/06/2024 8 AM 11 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Mq Hazardous 425 to 504 Health warning of emergency conditions: ever• • - likely • be affected. Thursday, November 7, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/07/2024 8 AM Matter • 7 Level of Concern Good Hangar Fenceline - E Side 11/07/2024 8 AM 15 Good Hangar Fenceline - N Center 11/07/2024 8 AM 8 Good Hangar Fenceline - N Corner 11/07/2024 8 AM 7 Good Hangar Fenceline - NE Corner 11/07/2024 8 AM 6 Good Hangar Fenceline - NE Side 11/07/2024 8 AM 9 Good Hangar Fenceline - S Corner 11/07/2024 8 AM ** ** Hangar Fenceline - S Side 11/07/2024 8 AM 9 Good Hangar Fenceline - SW Corner 11/07/2024 8 AM 8 Good Hangar Fenceline - SW Side 11/07/2024 8 AM 8 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/07/2024 8 AM Particulate Matter • 4 Level of Concern Good Legacy Road 11/07/2024 8 AM 4 Good Moffett and Tustin Ranch 11/07/2024 8 AM ** ** Valencia and Armstrong 11/07/2024 8 AM 17 Good Valencia and Columbus Square 11/07/2024 8 AM 5 Good Valencia and Legacy 11/07/2024 8 AM 8 Good Victory and Tustin Ranch Rd. 11/07/2024 8 AM 8 Good Warner Avenue 11/07/2024 8 AM 12 Good Warner and Armstrong 11/07/2024 8 AM 29 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Friday, November 8, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/08/2024 8 AM Matter • 9 Level of Concern Good Hangar Fenceline - E Side 11/08/2024 8 AM 10 Good Hangar Fenceline - N Center 11/08/2024 8 AM 11 Good Hangar Fenceline - N Corner 11/08/2024 8 AM 6 Good Hangar Fenceline - NE Corner 11/08/2024 8 AM 7 Good Hangar Fenceline - NE Side 11/08/2024 8 AM 10 Good Hangar Fenceline - S Corner 11/08/2024 8 AM 7 Good Hangar Fenceline - S Side 11/08/2024 8 AM 11 Good Hangar Fenceline - SW Corner 11/08/2024 8 AM 9 Good Hangar Fenceline - SW Side 11/08/2024 8 AM 6 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/08/2024 8 AM Particulate Matter • 7 Level of Concern Good Legacy Road 11/08/2024 8 AM ** ** Moffett and Tustin Ranch 11/08/2024 8 AM 10 Good Valencia and Armstrong 11/08/2024 8 AM 15 Good Valencia and Columbus Square 11/08/2024 8 AM 5 Good Valencia and Legacy 11/08/2024 8 AM 9 Good Victory and Tustin Ranch Rd. 11/08/2024 8 AM 11 Good Warner Avenue 11/08/2024 8 AM 8 Good Warner and Armstrong 11/08/2024 8 AM 11 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Saturday, November 9, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/09/2024 8 AM Matter • 12 Level of Concern Good Hangar Fenceline - E Side 11/09/2024 8 AM 14 Good Hangar Fenceline - N Center 11/09/2024 8 AM 13 Good Hangar Fenceline - N Corner 11/09/2024 8 AM 10 Good Hangar Fenceline - NE Corner 11/09/2024 8 AM 15 Good Hangar Fenceline - NE Side 11/09/2024 8 AM 9 Good Hangar Fenceline - S Corner 11/09/2024 8 AM 11 Good Hangar Fenceline - S Side 11/09/2024 8 AM 15 Good Hangar Fenceline - SW Corner 11/09/2024 8 AM 14 Good Hangar Fenceline - SW Side 11/09/2024 8 AM 9 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/09/2024 8 AM Particulate Matter • 11 Level of Concern Good Legacy Road 11/09/2024 8 AM 10 Good Moffett and Tustin Ranch 11/09/2024 8 AM 11 Good Valencia and Armstrong 11/09/2024 8 AM 23 Good Valencia and Columbus Square 11/09/2024 8 AM 11 Good Valencia and Legacy 11/09/2024 8 AM 14 Good Victory and Tustin Ranch Rd. 11/09/2024 8 AM 16 Good Warner Avenue 11/09/2024 8 AM 13 Good Warner and Armstrong 11/09/2024 8 AM 11 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Sunday, November 10, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/10/2024 8 AM Matter • ** Level of Concern ** Hangar Fenceline - E Side 11/10/2024 8 AM 26 Good Hangar Fenceline - N Center 11/10/2024 8 AM 24 Good Hangar Fenceline - N Corner 11/10/2024 8 AM 22 Good Hangar Fenceline - NE Corner 11/10/2024 8 AM 33 Good Hangar Fenceline - NE Side 11/10/2024 8 AM 20 Good Hangar Fenceline - S Corner 11/10/2024 8 AM 22 Good Hangar Fenceline - S Side 11/10/2024 8 AM 27 Good Hangar Fenceline - SW Corner 11/10/2024 8 AM 27 Good Hangar Fenceline - SW Side 11/10/2024 8 AM 21 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/10/2024 8 AM Particulate Matter • 22 Level of Concern Good Legacy Road 11/10/2024 8 AM 21 Good Moffett and Tustin Ranch 11/10/2024 8 AM 21 Good Valencia and Armstrong 11/10/2024 8 AM 43 Good Valencia and Columbus Square 11/10/2024 8 AM 25 Good Valencia and Legacy 11/10/2024 8 AM 27 Good Victory and Tustin Ranch Rd. 11/10/2024 8 AM 31 Good Warner Avenue 11/10/2024 8 AM 24 Good Warner and Armstrong 11/10/2024 8 AM 22 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Monday, November 11, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/11/2024 8 AM Matter • 37 Level of Concern Good Hangar Fenceline - E Side 11/11/2024 8 AM 37 Good Hangar Fenceline - N Center 11/11/2024 8 AM 36 Good Hangar Fenceline - N Corner 11/11/2024 8 AM ** ** Hangar Fenceline - NE Corner 11/11/2024 8 AM 46 Good Hangar Fenceline - NE Side 11/11/2024 8 AM 30 Good Hangar Fenceline - S Corner 11/11/2024 8 AM 31 Good Hangar Fenceline - S Side 11/11/2024 8 AM 39 Good Hangar Fenceline - SW Corner 11/11/2024 8 AM 41 Good Hangar Fenceline - SW Side 11/11/2024 8 AM 31 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/11/2024 8 AM Particulate Matter • 33 Level of Concern Good Legacy Road 11/11/2024 8 AM 32 Good Moffett and Tustin Ranch 11/11/2024 8 AM 31 Good Valencia and Armstrong 11/11/2024 8 AM 62 Moderate Valencia and Columbus Square 11/11/2024 8 AM 40 Good Valencia and Legacy 11/11/2024 8 AM 37 Good Victory and Tustin Ranch Rd. 11/11/2024 8 AM 44 Good Warner Avenue 11/11/2024 8 AM 33 Good Warner and Armstrong 11/11/2024 8 AM 33 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Tuesday, November 12, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/12/2024 8 AM Matter • 25 Level of Concern Good Hangar Fenceline - E Side 11/12/2024 8 AM 28 Good Hangar Fenceline - N Center 11/12/2024 8 AM 29 Good Hangar Fenceline - N Corner 11/12/2024 8 AM 21 Good Hangar Fenceline - NE Corner 11/12/2024 8 AM 39 Good Hangar Fenceline - NE Side 11/12/2024 8 AM 23 Good Hangar Fenceline - S Corner 11/12/2024 8 AM ** ** Hangar Fenceline - S Side 11/12/2024 8 AM 30 Good Hangar Fenceline - SW Corner 11/12/2024 8 AM 33 Good Hangar Fenceline - SW Side 11/12/2024 8 AM 25 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/12/2024 8 AM Particulate Matter • ** Level of Concern ** Legacy Road 11/12/2024 8 AM 24 Good Moffett and Tustin Ranch 11/12/2024 8 AM 22 Good Valencia and Armstrong 11/12/2024 8 AM 49 Good Valencia and Columbus Square 11/12/2024 8 AM 32 Good Valencia and Legacy 11/12/2024 8 AM 29 Good Victory and Tustin Ranch Rd. 11/12/2024 8 AM 32 Good Warner Avenue 11/12/2024 8 AM 26 Good Warner and Armstrong 11/12/2024 8 AM 21 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Wednesday, November 13, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/13/2024 8 AM Matter • 13 Level of Concern Good Hangar Fenceline - E Side 11/13/2024 8 AM 15 Good Hangar Fenceline - N Center 11/13/2024 8 AM 14 Good Hangar Fenceline - N Corner 11/13/2024 8 AM 11 Good Hangar Fenceline - NE Corner 11/13/2024 8 AM 18 Good Hangar Fenceline - NE Side 11/13/2024 8 AM 11 Good Hangar Fenceline - S Corner 11/13/2024 8 AM ** ** Hangar Fenceline - S Side 11/13/2024 8 AM 15 Good Hangar Fenceline - SW Corner 11/13/2024 8 AM 14 Good • •24-Hour Hangar Fenceline - SW Side Period • • 11/13/2024 8 AM Particulate Matter • 10 Level of Concern Good Hangar Fenceline - W Side 11/13/2024 8 AM ** ** Legacy Road 11/13/2024 8 AM 11 Good Moffett and Tustin Ranch 11/13/2024 8 AM 11 Good Valencia and Armstrong 11/13/2024 8 AM 23 Good Valencia and Columbus Square 11/13/2024 8 AM 12 Good Valencia and Legacy 11/13/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 11/13/2024 8 AM 17 Good Warner Avenue 11/13/2024 8 AM 12 Good Warner and Armstrong 11/13/2024 8 AM 13 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health -ftorts is increased for everyone. Haza;r�O—US7 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Thursday, November 14, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/14/2024 8 AM Matter • 11 Level of Concern Good Hangar Fenceline - E Side 11/14/2024 8 AM 12 Good Hangar Fenceline - N Center 11/14/2024 8 AM 11 Good Hangar Fenceline - N Corner 11/14/2024 8 AM 10 Good Hangar Fenceline - NE Corner 11/14/2024 8 AM 17 Good Hangar Fenceline - NE Side 11/14/2024 8 AM 10 Good Hangar Fenceline - S Corner 11/14/2024 8 AM 10 Good Hangar Fenceline - S Side 11/14/2024 8 AM 12 Good Hangar Fenceline - SW Corner 11/14/2024 8 AM 13 Good • •24-Hour Hangar Fenceline - SW Side Period • • 11/14/2024 8 AM Particulate Matter • 8 Level of Concern Good Hangar Fenceline - W Side 11/14/2024 8 AM ** ** Legacy Road 11/14/2024 8 AM 10 Good Moffett and Tustin Ranch 11/14/2024 8 AM 8 Good Valencia and Armstrong 11/14/2024 8 AM 22 Good Valencia and Columbus Square 11/14/2024 8 AM 11 Good Valencia and Legacy 11/14/2024 8 AM 13 Good Victory and Tustin Ranch Rd. 11/14/2024 8 AM 13 Good Warner Avenue 11/14/2024 8 AM 11 Good Warner and Armstrong 11/14/2024 8 AM 9 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health e is is increased for everyone Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely r to be affected. Friday, November 15, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/15/2024 8 AM Matter • 11 Level of Concern Good Hangar Fenceline - E Side 11/15/2024 8 AM 13 Good Hangar Fenceline - N Center 11/15/2024 8 AM 14 Good Hangar Fenceline - N Corner 11/15/2024 8 AM ** ** Hangar Fenceline - NE Corner 11/15/2024 8 AM 20 Good Hangar Fenceline - NE Side 11/15/2024 8 AM 10 Good Hangar Fenceline - S Corner 11/15/2024 8 AM 10 Good Hangar Fenceline - S Side 11/15/2024 8 AM 14 Good Hangar Fenceline - SW Corner 11/15/2024 8 AM 15 Good Hangar Fenceline - SW Side 11/15/2024 8 AM 9 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/15/2024 8 AM Particulate Matter • 11 Level of Concern Good Legacy Road 11/15/2024 8 AM 10 Good Moffett and Tustin Ranch 11/15/2024 8 AM 6 Good Valencia and Armstrong 11/15/2024 8 AM 21 Good Valencia and Columbus Square 11/15/2024 8 AM 15 Good Valencia and Legacy 11/15/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 11/15/2024 8 AM 15 Good Warner Avenue 11/15/2024 8 AM 11 Good Warner and Armstrong 11/15/2024 8 AM 8 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Saturday, November 16, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/16/2024 8 AM Matter • 12 Level of Concern Good Hangar Fenceline - E Side 11/16/2024 8 AM 11 Good Hangar Fenceline - N Center 11/16/2024 8 AM 13 Good Hangar Fenceline - N Corner 11/16/2024 8 AM ** ** Hangar Fenceline - NE Corner 11/16/2024 8 AM 13 Good Hangar Fenceline - NE Side 11/16/2024 8 AM 9 Good Hangar Fenceline - S Corner 11/16/2024 8 AM 7 Good Hangar Fenceline - S Side 11/16/2024 8 AM 11 Good Hangar Fenceline - SW Corner 11/16/2024 8 AM 12 Good Hangar Fenceline - SW Side 11/16/2024 8 AM ** ** • •24-Hour Hangar Fenceline - W Side Period • • 11/16/2024 8 AM Particulate Matter • ** Level of Concern ** Legacy Road 11/16/2024 8 AM 9 Good Moffett and Tustin Ranch 11/16/2024 8 AM ** ** Valencia and Armstrong 11/16/2024 8 AM 16 Good Valencia and Columbus Square 11/16/2024 8 AM 10 Good Valencia and Legacy 11/16/2024 8 AM 12 Good Victory and Tustin Ranch Rd. 11/16/2024 8 AM 14 Good Warner Avenue 11/16/2024 8 AM 10 Good Warner and Armstrong 11/16/2024 8 AM 12 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Sunday, November 17, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period24-Hour Ending 11/17/2024 8 AM Particulate Matter 9 Level of Concern Good Hangar Fenceline - E Side 11/17/2024 8 AM 10 Good Hangar Fenceline - N Center 11/17/2024 8 AM 11 Good Hangar Fenceline - N Corner 11/17/2024 8 AM 9 Good Hangar Fenceline - NE Corner 11/17/2024 8 AM 14 Good Hangar Fenceline - NE Side 11/17/2024 8 AM ** ** Hangar Fenceline - S Corner 11/17/2024 8 AM 10 Good Hangar Fenceline - S Side 11/17/2024 8 AM 12 Good Hangar Fenceline - SW Corner 11/17/2024 8 AM 11 Good Hangar Fenceline - SW Side 11/17/2024 8 AM ** ** Location Hangar Fenceline - W Side 24-Hour Period Endingof 11/17/2024 8 AM 9 Concern Good Legacy Road 11/17/2024 8 AM 8 Good Moffett and Tustin Ranch 11/17/2024 8 AM 7 Good Valencia and Armstrong 11/17/2024 8 AM 19 Good Valencia and Columbus Square 11/17/2024 8 AM 10 Good Valencia and Legacy 11/17/2024 8 AM 11 Good Victory and Tustin Ranch Rd. 11/17/2024 8 AM 12 Good Warner Avenue 11/17/2024 8 AM 10 Good Warner and Armstrong 11/17/2024 8 AM 11 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health effects is increased for everyone. Hazardous 425 to 504 Health warning of emergency - conditions: ever. . likely ..- affected. Monday, November 18, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/18/2024 8 AM Matter • 11 Level of Concern Good Hangar Fenceline - E Side 11/18/2024 8 AM 13 Good Hangar Fenceline - N Center 11/18/2024 8 AM 13 Good Hangar Fenceline - N Corner 11/18/2024 8 AM ** ** Hangar Fenceline - NE Corner 11/18/2024 8 AM 19 Good Hangar Fenceline - NE Side 11/18/2024 8 AM 10 Good Hangar Fenceline - S Corner 11/18/2024 8 AM 13 Good Hangar Fenceline - S Side 11/18/2024 8 AM 13 Good Hangar Fenceline - SW Corner 11/18/2024 8 AM ** Good Hangar Fenceline - SW Side 11/18/2024 8 AM 12 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/18/2024 8 AM Particulate Matter • 12 Level of Concern ** Legacy Road 11/18/2024 8 AM 11 Good Moffett and Tustin Ranch 11/18/2024 8 AM 10 ** Valencia and Armstrong 11/18/2024 8 AM 26 Good Valencia and Columbus Square 11/18/2024 8 AM 14 Good Valencia and Legacy 11/18/2024 8 AM 14 Good Victory and Tustin Ranch Rd. 11/18/2024 8 AM 14 Good Warner Avenue 11/18/2024 8 AM 13 Good Warner and Armstrong 11/18/2024 8 AM 15 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Tuesday, November 19, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/19/2024 8 AM Matter • 17 Level of Concern Good Hangar Fenceline - E Side 11/19/2024 8 AM 16 Good Hangar Fenceline - N Center 11/19/2024 8 AM 19 Good Hangar Fenceline - N Corner 11/19/2024 8 AM ** ** Hangar Fenceline - NE Corner 11/19/2024 8 AM 22 Good Hangar Fenceline - NE Side 11/19/2024 8 AM 13 Good Hangar Fenceline - S Corner 11/19/2024 8 AM 13 Good Hangar Fenceline - S Side 11/19/2024 8 AM 15 Good Hangar Fenceline - SW Corner 11/19/2024 8 AM 20 Good Hangar Fenceline - SW Side 11/19/2024 8 AM 13 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/19/2024 8 AM Particulate Matter • ** Level of Concern ** Legacy Road 11/19/2024 8 AM 15 Good Moffett and Tustin Ranch 11/19/2024 8 AM 11 Good Valencia and Armstrong 11/19/2024 8 AM 24 Good Valencia and Columbus Square 11/19/2024 8 AM 17 Good Valencia and Legacy 11/19/2024 8 AM 16 Good Victory and Tustin Ranch Rd. 11/19/2024 8 AM 18 Good Warner Avenue 11/19/2024 8 AM 15 Good Warner and Armstrong 11/19/2024 8 AM 14 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Wednesday, November 20, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthyfor Wnhealthy Sensitive Groups (255 to Unhealthy EL(155 to 254)354) See below for further category descriptions. ** Data gap due to instrument malfunction Very Unhealthy Hazardous (355 to 424) (425-504) Location Columbus Square Park Period Ending 11/20/2024 8 AM Matter • 24 Level of Concern Good Hangar Fenceline - E Side 11/20/2024 8 AM 26 Good Hangar Fenceline - N Center 11/20/2024 8 AM 28 Good Hangar Fenceline - N Corner 11/20/2024 8 AM 19 Good Hangar Fenceline - NE Corner 11/20/2024 8 AM 34 Good Hangar Fenceline - NE Side 11/20/2024 8 AM 21 Good Hangar Fenceline - S Corner 11/20/2024 8 AM 21 Good Hangar Fenceline - S Side 11/20/2024 8 AM 26 Good Hangar Fenceline - SW Corner 11/20/2024 8 AM 29 Good Hangar Fenceline - SW Side 11/20/2024 8 AM 24 Good • •24-Hour Hangar Fenceline - W Side Period • • 11/20/2024 8 AM Particulate Matter • 22 Level of Concern Good Legacy Road 11/20/2024 8 AM 22 Good Moffett and Tustin Ranch 11/20/2024 8 AM 19 Good Valencia and Armstrong 11/20/2024 8 AM 37 Good Valencia and Columbus Square 11/20/2024 8 AM 28 Good Valencia and Legacy 11/20/2024 8 AM 27 Good Victory and Tustin Ranch Rd. 11/20/2024 8 AM 29 Good Warner Avenue 11/20/2024 8 AM 24 Good Warner and Armstrong 11/20/2024 8 AM ** ** Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health eMasts is increased for everyone. Hazardous 425 to 504 Health warning of emergency conditions: ever•ne is more likely to be affected. Thursday, November21, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park 24-Hour Period Ending 11/21/2024 8 AM • 23 Good Hangar Fenceline - E Side 11/21/2024 8 AM 25 Good Hangar Fenceline - N Center 11/21/2024 8 AM 26 Good Hangar Fenceline - N Corner 11/21/2024 8 AM 22 Good Hangar Fenceline - NE Corner 11/21/2024 8 AM 35 Good Hangar Fenceline - NE Side 11/21/2024 8 AM 22 Good Hangar Fenceline - S Corner 11/21/2024 8 AM 22 Good Hangar Fenceline - S Side 11/21/2024 8 AM 26 Good Hangar Fenceline - SW Corner 11/21/2024 8 AM 29 Good Hangar Fenceline - SW Side 11/21/2024 8 AM 27 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/21/2024 8 AM Particulate Matter • 22 Level of Concern Good Legacy Road 11/21/2024 8 AM 22 Good Moffett and Tustin Ranch 11/21/2024 8 AM 20 Good Valencia and Armstrong 11/21/2024 8 AM 42 Good Valencia and Columbus Square 11/21/2024 8 AM 25 Good Valencia and Legacy 11/21/2024 8 AM 27 Good Victory and Tustin Ranch Rd. 11/21/2024 8 AM 31 Good Warner Avenue 11/21/2024 8 AM 24 Good Warner and Armstrong 11/21/2024 8 AM 23 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Friday, November 22, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) (425-504) Columbus Square Park PeriodLocation 24-Hour Ending 11/22/2024 8 AM Particulate Matter ** Level of Concern ** Hangar Fenceline - E Side 11/22/2024 8 AM 27 Good Hangar Fenceline - N Center 11/22/2024 8 AM 28 Good Hangar Fenceline - N Corner 11/22/2024 8 AM 22 Good Hangar Fenceline - NE Corner 11/22/2024 8 AM 35 Good Hangar Fenceline - NE Side 11/22/2024 8 AM ** ** Hangar Fenceline - S Corner 11/22/2024 8 AM 23 Good Hangar Fenceline - S Side 11/22/2024 8 AM 27 Good Hangar Fenceline - SW Corner 11/22/2024 8 AM 29 Good Hangar Fenceline - SW Side 11/22/2024 8 AM 22 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/22/2024 8 AM Particulate Matter • 23 Level of Concern Good Legacy Road 11/22/2024 8 AM 22 Good Moffett and Tustin Ranch 11/22/2024 8 AM 19 Good Valencia and Armstrong 11/22/2024 8 AM 43 Good Valencia and Columbus Square 11/22/2024 8 AM 27 Good Valencia and Legacy 11/22/2024 8 AM 27 Good Victory and Tustin Ranch Rd. 11/22/2024 8 AM 33 Good Warner Avenue 11/22/2024 8 AM 26 Good Warner and Armstrong 11/22/2024 8 AM 24 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Saturday, November 23, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/23/2024 8 AM Matter • 27 Level of Concern Good Hangar Fenceline - E Side 11/23/2024 8 AM 25 Good Hangar Fenceline - N Center 11/23/2024 8 AM 28 Good Hangar Fenceline - N Corner 11/23/2024 8 AM 19 Good Hangar Fenceline - NE Corner 11/23/2024 8 AM 33 Good Hangar Fenceline - NE Side 11/23/2024 8 AM ** ** Hangar Fenceline - S Corner 11/23/2024 8 AM 20 Good Hangar Fenceline - S Side 11/23/2024 8 AM 25 Good Hangar Fenceline - SW Corner 11/23/2024 8 AM 29 Good Hangar Fenceline - SW Side 11/23/2024 8 AM 22 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/23/2024 8 AM Particulate Matter • 22 Level of Concern Good Legacy Road 11/23/2024 8 AM 21 Good Moffett and Tustin Ranch 11/23/2024 8 AM 16 Good Valencia and Armstrong 11/23/2024 8 AM 38 Good Valencia and Columbus Square 11/23/2024 8 AM 25 Good Valencia and Legacy 11/23/2024 8 AM 26 Good Victory and Tustin Ranch Rd. 11/23/2024 8 AM 29 Good Warner Avenue 11/23/2024 8 AM 23 Good Warner and Armstrong 11/23/2024 8 AM 19 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Sunday, November 24, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for 5P Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/24/2024 8 AM Matter • 20 Level of Concern Good Hangar Fenceline - E Side 11/24/2024 8 AM 15 Good Hangar Fenceline - N Center 11/24/2024 8 AM 16 Good Hangar Fenceline - N Corner 11/24/2024 8 AM 12 Good Hangar Fenceline - NE Corner 11/24/2024 8 AM 21 Good Hangar Fenceline - NE Side 11/24/2024 8 AM ** ** Hangar Fenceline - S Corner 11/24/2024 8 AM 13 Good Hangar Fenceline - S Side 11/24/2024 8 AM 15 Good Hangar Fenceline - SW Corner 11/24/2024 8 AM 19 Good Hangar Fenceline - SW Side 11/24/2024 8 AM 14 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/24/2024 8 AM Particulate Matter • 14 Level of Concern Good Legacy Road 11/24/2024 8 AM 14 Good Moffett and Tustin Ranch 11/24/2024 8 AM 10 Good Valencia and Armstrong 11/24/2024 8 AM 24 Good Valencia and Columbus Square 11/24/2024 8 AM 16 Good Valencia and Legacy 11/24/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 11/24/2024 8 AM 16 Good Warner Avenue 11/24/2024 8 AM ** ** Warner and Armstrong 11/24/2024 8 AM 12 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Monday, November 25, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/25/2024 8 AM Matter • 20 Level of Concern Good Hangar Fenceline - E Side 11/25/2024 8 AM 12 Good Hangar Fenceline - N Center 11/25/2024 8 AM 14 Good Hangar Fenceline - N Corner 11/25/2024 8 AM 9 Good Hangar Fenceline - NE Corner 11/25/2024 8 AM 15 Good Hangar Fenceline - NE Side 11/25/2024 8 AM ** ** Hangar Fenceline - S Corner 11/25/2024 8 AM 9 Good Hangar Fenceline - S Side 11/25/2024 8 AM ** ** Hangar Fenceline - SW Corner 11/25/2024 8 AM 14 Good Hangar Fenceline - SW Side 11/25/2024 8 AM 10 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/25/2024 8 AM Particulate Matter • 11 Level of Concern Good Legacy Road 11/25/2024 8 AM 11 Good Moffett and Tustin Ranch 11/25/2024 8 AM 8 Good Valencia and Armstrong 11/25/2024 8 AM 20 Good Valencia and Columbus Square 11/25/2024 8 AM 12 Good Valencia and Legacy 11/25/2024 8 AM 12 Good Victory and Tustin Ranch Rd. 11/25/2024 8 AM 12 Good Warner Avenue 11/25/2024 8 AM 12 Good Warner and Armstrong 11/25/2024 8 AM 12 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Tuesday, November 26, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for 5P Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/26/2024 8 AM Matter • 32 Level of Concern Good Hangar Fenceline - E Side 11/26/2024 8 AM 28 Good Hangar Fenceline - N Center 11/26/2024 8 AM 28 Good Hangar Fenceline - N Corner 11/26/2024 8 AM 20 Good Hangar Fenceline - NE Corner 11/26/2024 8 AM 36 Good Hangar Fenceline - NE Side 11/26/2024 8 AM ** ** Hangar Fenceline - S Corner 11/26/2024 8 AM 22 Good Hangar Fenceline - S Side 11/26/2024 8 AM 31 Good Hangar Fenceline - SW Corner 11/26/2024 8 AM 32 Good Hangar Fenceline - SW Side 11/26/2024 8 AM 25 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/26/2024 8 AM Particulate Matter • 24 Level of Concern Good Legacy Road 11/26/2024 8 AM 25 Good Moffett and Tustin Ranch 11/26/2024 8 AM 19 Good Valencia and Armstrong 11/26/2024 8 AM 43 Good Valencia and Columbus Square 11/26/2024 8 AM 27 Good Valencia and Legacy 11/26/2024 8 AM 28 Good Victory and Tustin Ranch Rd. 11/26/2024 8 AM 30 Good Warner Avenue 11/26/2024 8 AM 27 Good Warner and Armstrong 11/26/2024 8 AM 24 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Wednesday, November 27, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) (425-504) Columbus Square Park PeriodLocation 24-Hour Ending 11/27/2024 8 AM Particulate Matter ** Level of Concern ** Hangar Fenceline - E Side 11/27/2024 8 AM 19 Good Hangar Fenceline - N Center 11/27/2024 8 AM 20 Good Hangar Fenceline - N Corner 11/27/2024 8 AM 14 Good Hangar Fenceline - NE Corner 11/27/2024 8 AM 25 Good Hangar Fenceline - NE Side 11/27/2024 8 AM ** ** Hangar Fenceline - S Corner 11/27/2024 8 AM 16 Good Hangar Fenceline - S Side 11/27/2024 8 AM 19 Good Hangar Fenceline - SW Corner 11/27/2024 8 AM 23 Good Hangar Fenceline - SW Side 11/27/2024 8 AM 18 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/27/2024 8 AM Particulate Matter • 17 Level of Concern Good Legacy Road 11/27/2024 8 AM 17 Good Moffett and Tustin Ranch 11/27/2024 8 AM 11 Good Valencia and Armstrong 11/27/2024 8 AM 31 Good Valencia and Columbus Square 11/27/2024 8 AM 22 Good Valencia and Legacy 11/27/2024 8 AM 19 Good Victory and Tustin Ranch Rd. 11/27/2024 8 AM 18 Good Warner Avenue 11/27/2024 8 AM 17 Good Warner and Armstrong 11/27/2024 8 AM ** ** Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Thursday, November 28, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for wr Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) (425-504) Columbus Square Park PeriodLocation 24-Hour Ending 11/28/2024 8 AM Particulate Matter Level of Concern Hangar Fenceline - E Side 11/28/2024 8 AM 41 Good Hangar Fenceline - N Center 11/28/2024 8 AM 43 Good Hangar Fenceline - N Corner 11/28/2024 8 AM 27 Good Hangar Fenceline - NE Corner 11/28/2024 8 AM 48 Good Hangar Fenceline - NE Side 11/28/2024 8 AM 36 Good Hangar Fenceline - S Corner 11/28/2024 8 AM 28 Good Hangar Fenceline - S Side 11/28/2024 8 AM 38 Good Hangar Fenceline - SW Corner 11/28/2024 8 AM 51 Good Hangar Fenceline - SW Side 11/28/2024 8 AM 37 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/28/2024 8 AM Particulate Matter • 37 Level of Concern Good Legacy Road 11/28/2024 8 AM 37 Good Moffett and Tustin Ranch 11/28/2024 8 AM 22 Good Valencia and Armstrong 11/28/2024 8 AM 61 Moderate Valencia and Columbus Square 11/28/2024 8 AM 44 Good Valencia and Legacy 11/28/2024 8 AM 38 Good Victory and Tustin Ranch Rd. 11/28/2024 8 AM 42 Good Warner Avenue 11/28/2024 8 AM 36 Good Warner and Armstrong 11/28/2024 8 AM 31 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Friday, November 29, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for 5P Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/29/2024 8 AM Matter • 26 Level of Concern Good Hangar Fenceline - E Side 11/29/2024 8 AM 23 Good Hangar Fenceline - N Center 11/29/2024 8 AM 25 Good Hangar Fenceline - N Corner 11/29/2024 8 AM 20 Good Hangar Fenceline - NE Corner 11/29/2024 8 AM 29 Good Hangar Fenceline - NE Side 11/29/2024 8 AM 25 Good Hangar Fenceline - S Corner 11/29/2024 8 AM ** ** Hangar Fenceline - S Side 11/29/2024 8 AM 29 Good Hangar Fenceline - SW Corner 11/29/2024 8 AM 29 Good Hangar Fenceline - SW Side 11/29/2024 8 AM 22 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/29/2024 8 AM Particulate Matter • 22 Level of Concern Good Legacy Road 11/29/2024 8 AM 21 Good Moffett and Tustin Ranch 11/29/2024 8 AM 16 Good Valencia and Armstrong 11/29/2024 8 AM 46 Good Valencia and Columbus Square 11/29/2024 8 AM 26 Good Valencia and Legacy 11/29/2024 8 AM 26 Good Victory and Tustin Ranch Rd. 11/29/2024 8 AM 29 Good Warner Avenue 11/29/2024 8 AM 23 Good Warner and Armstrong 11/29/2024 8 AM 22 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected. Saturday, November 30, 2024 North Hangar Fire Incident I City of Tustin Air Quality Updates: Particulate Matter Air monitoring and sampling locations have been set up around the perimeter of the hangar and in surrounding communities to provide real-time information on Particulate Matter (PM) in the air. While the units are in place, an average reading for the last 24 hours will be provided for the public's reference. Any questions regarding these numbers should be directed to the call center at 714-426-2444. Monitoring Air Quality for Sensitive Individuals An environmental group contracted by the U.S. Navy is monitoring the air quality around the incident for any readings above 154 micrograms per cubic meter (ug/m3), which may cause individuals in sensitive groups to experience health effects. This is a moderate threshold that is less likely to affect the general public. What is Particulate Matter? "Particulate matter," also known as particle pollution or PM, is a complex mixture of extremely small particles and liquid droplets that exists in the environment including pollen, dust, and soil. Typical particulate matter for the area ranges from 3 to 67 ug/m3. The concentration range is based on sampling results collected by South Coast AQMD in Anaheim, CA, which was the closest available dataset in proximity to the site. For more information about air quality and monitoring, visit the AirNow website at www.airnow.gov. Good Moderate (0 to 54) (55 to 154) Unhealthy for 5P Unhealthy Sensitive Groups (255 to 354) (155 to 254) * See below for further category descriptions. ** Data gap due to instrument malfunction Very UnhealthyHazardous (355 to 424) • Location Columbus Square Park Period Ending 11/30/2024 8 AM Matter • 15 Level of Concern Good Hangar Fenceline - E Side 11/30/2024 8 AM 13 Good Hangar Fenceline - N Center 11/30/2024 8 AM 14 Good Hangar Fenceline - N Corner 11/30/2024 8 AM 10 Good Hangar Fenceline - NE Corner 11/30/2024 8 AM 17 Good Hangar Fenceline - NE Side 11/30/2024 8 AM 14 Good Hangar Fenceline - S Corner 11/30/2024 8 AM ** ** Hangar Fenceline - S Side 11/30/2024 8 AM 16 Good Hangar Fenceline - SW Corner 11/30/2024 8 AM 15 Good Hangar Fenceline - SW Side 11/30/2024 8 AM 12 Good • •24-Hour Hangar Fenceline - W Side Period Ending 11/30/2024 8 AM Particulate Matter • 11 Level of Concern Good Legacy Road 11/30/2024 8 AM 11 Good Moffett and Tustin Ranch 11/30/2024 8 AM 10 Good Valencia and Armstrong 11/30/2024 8 AM 25 Good Valencia and Columbus Square 11/30/2024 8 AM 15 Good Valencia and Legacy 11/30/2024 8 AM 15 Good Victory and Tustin Ranch Rd. 11/30/2024 8 AM 15 Good Warner Avenue 11/30/2024 8 AM 12 Good Warner and Armstrong 11/30/2024 8 AM 9 Good Category Descriptions Color Green Good 0 to 54 Air quality is satisfactory, and air pollution poses little or no risk. Yellow Moderate 55 to 154 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. Orange Unhealthy for Sensitive 155 to 254 Members of sensitive groups may Groups experience health effects. The general public is less likely to be affected. Red Unhealthy 255 to 354 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects. Purple Very Unhealthy 355 to 424 Health alert: The risk of health cts is increased for everyone. 425 to 504 Health warning of emergency veryone is more co • •ns: elikely • be affected.