All data shown are preliminary until validated every 90 days.
Benzene is a chemical that is a colorless or light-yellow liquid at room temperature. It has a sweet odor and is highly flammable. Benzene evaporates into the air very quickly. Its vapor is heavier than air and may sink into low-lying areas.
The AEGL-1 value for 4-hour exposure of 18 ppm (18,000 ppb) was selected by APCD as the notification threshold value for benzene.
Hydrogen Sulfide a chemical compound with the formula H2S. It is a colorless chalcogen-hydride gas, and is poisonous, corrosive, and flammable, with trace amounts in ambient atmosphere having a characteristic foul odor of rotten eggs.
The AEGL-1 value for 4-hour exposure of 0.36 ppm (360 ppb) was selected by APCD as the notification threshold value for H2S.
Hydrogen cyanide is a chemical compound with the formula HCN. HCN has a faint bitter almond-like odor that some people are unable to detect. Exposure to HCN can harm the brain, heart, blood vessels, and lungs.
The AEGL-1 value for 4-hour exposure of 1.3 ppm (1300 ppb) was selected by APCD as the notification threshold value for HCN.
- MDL = Minimum Detection Limit
- AEGL = Acute Exposure Guideline Level
- INV= Value was invalidated due to automated QA/QC checks
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