OAR 340-202-0130: Ambient Air Quality Standards: Lead

The concentration of lead and its compounds in ambient air must not exceed: (1) 0.15 micrograms per cubic meter as a maximum arithmetic mean averaged over a calendar quarter, as measured by a reference method based on appendix G of 40 CFR part 53 or an equivalent method designated in accordance with 40 CFR part 53. (2) The standard is met when the maximum arithmetic 3-month mean concentration for a 3-year period, as determined in accordance with appendix R of 40 CFR part, is less than or equal to 0.15 micrograms per cubic meter. [NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.] [NOTE: View a PDF of referenced appendices by clicking on "Tables" link below.] [ED. NOTE: To view attachments referenced in rule text, click here to view rule.]