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o Changes in product composition, |
o Changes in production rate, |
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o Changes in equipment efficiency, |
o Changes in design standards, |
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o Cost effectiveness |
o Extending design life |
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o Safety precautions |
o Environnemental conditions & acceptable emission rates |
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o Water system, flare, drain to sea & land, |
o Disposal of waste. |
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o Separation Efficiency |
o Power generation facilities |