| Air Quality Criteria | WNP Processing Plant Air Discharge Assessment | 4397169-66885702-113 | 16/06/2022 | 11 Sensitivity: General Table 3-2 Relevant air quality assessment criteria for non-mercury metals Contaminant Averaging period Threshold concentration Source Arsenic 1-hour 0.2 µg/m3 OEHHA 8-hour 0.015 µg/m3 OEHHA annual 0.0055 µg/m3 AAQG Cadmium17 annual 0.0056 µg/m3 USEPA Chromium (VI) annual 0.0011 µg/m3 AAQG Copper 1-hour 100 µg/m3 OEHHA Manganese 8-hour 0.17 µg/m3 OEHHA annual 0.09 µg/m3 OEHHA Nickel 1-hour 0.2 µg/m3 OEHHA 8-hour 0.06 µg/m3 OEHHA annual 0.014 µg/m3 OEHHA Lead 3-month 0.2 µg/m3 AAQG Selenium annual 20 µg/m3 OEHHA 17 Calculated from the USEPA Cancer Inhalation Unit Risk of 1.8 x 10-3 per µg/m3. Derived guideline concentration represented a 1 /100,000 risk. The same guideline was used in the 2012 assessment. The non-cancer chronic exposure guideline level published by OEHHA is 0.02 µg/m3.
RkJQdWJsaXNoZXIy MjE2NDg3