(a) The Director shall create an Air Pollutant Exposure Zone Map according to Rules and Regulations as authorized by Section 3809. The Air Pollutant Exposure Zone Map shall depict all locations in the City where the estimated cumulative PM2.5 concentration is greater than 10 μg/m3
or where the estimated cumulative excess risk of cancer from air pollutants resulting from lifetime (70 year) exposure is greater than 100 in a million. Additionally, the Air Pollutant Exposure Zone Map shall include all locations within 500 feet of any Freeway, if those locations were not otherwise captured by modeling estimates. Within Health Vulnerable Locations, the Air Pollutant Exposure Zone Map shall depict all locations where the estimated cumulative PM2.5 concentration is greater than 9 μg/m3
or where the estimated cumulative excess risk of cancer from air pollutants resulting from lifetime (70 year) exposure is greater than 90 in a million. The Director shall update the Air Pollutant Exposure Zone Map to identify new sources, updated pollutant standards, additional pollutants and standards tor those pollutants, and updated methodologies in accordance with Section 3809 and the accompanying Rules and Regulations for this Article 38.
(b) The Director shall, at least once every five years, updated the Rules and Regulations governing creation of the Air Pollutant Exposure Zone Map to account for changes in information including, but not limited, to:
(1) Information available to estimate air pollutants of health concern;
(2) Information available to determine Health Vulnerable Locations; and
(3) Information that may affect delineation of the Air Pollutant Exposure Zone, including, but not limited to:
(A) Construction, expansion or modification of major roadways;
(B) Changes in traffic patterns in the City’s roadway system;
(C) Changes in area sources or siting of industrial or commercial sources of air pollution; and
(D) Climatic factors for which there is evidence of changes to air quality.
(c) The Director shall post the Air Pollutant Exposure Zone Map on the Department's website, and make paper copies of the map available to the public upon request.
(d) In creating and updating the Air Pollutant Exposure Zone Map, the Director shall follow the procedures specified in Section 3809.
(e) The Air Pollutant Exposure Zone Map that is operative as of the effective date of Ordinance No. 224-14
amending this Article 38, is on file with the Clerk of the Board of Supervisors in File No. 140806.
(Added as Sec. 3805 by Ord. 281-08, File No. 080934, 12/5/2008; redesignated and amended by Ord. 224-14
, File No. 140806, App. 11/7/2014, Eff. 12/7/2014)
(Former Sec. 3806 added by Ord. 281-08, File No. 080934, 12/5/2008; repealed by Ord. 224-14
, File No. 140806, App. 11/7/2014, Eff. 12/7/2014)