55-ME4211 - (POCPs) the reference substance is the gas...

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4.3 Calculate the Photochemical Ozone Formation Potential (i) Determine whether the emission is occurring in an area with high or low background concentration of NO x . The border between the two classes lies at a mean annual concentration of NO x of 10 ppbv (parts per billion by volume) or 0.02 mg/m3 over rural areas. (ii) For individual substances , find the substance’s equivalency factor in Table 4.4. 1
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For photochemical ozone Creation Potential
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Unformatted text preview: (POCPs) the reference substance is the gas ethylene (C2H4). EF(po)i = POCPi = Contribution to ozone formation from gas, i/ Contribution to ozone formation C2H4 (4.5) There is no international panel of experts for the environmental impact of photochemical ozone formation such as there is for Global environmental impacts. 2 POCPs 3 Table 4.4 presents POCP factors calculated for an intermediate time scale of 4-5 days. 4 5...
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55-ME4211 - (POCPs) the reference substance is the gas...

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