(log ppb) HPRT VF (x 10
(log ppb) HPRT VF (x 10
(log ppb) HPRT VF (x 10
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Butadien<br />
• BD monomer, styrene-BD polymer plants<br />
• Synthetic rubbers, resins, and plastics<br />
•Cigarette smoke, automobile exhaust, industrial<br />
emissions, gas formulations<br />
• Gas at 24°C, volatile, aromatic<br />
What is the route of entry?