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Pages 74-76

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From page 74...
... D-1 A p p e n d i x d 1. Question: Why should an airport implement an alternative system?
From page 75...
... D-2 Handbook for evaluating emissions and Costs of ApUs and Alternative Systems airports usually correspond to lower levels of funding, lower number of gates, smaller aircraft types, etc. In such cases, depending on how small the facility is, POU and portable diesel-powered systems may be better than central systems.
From page 76...
... Frequently Asked Questions D-3 12. Question: Which alternative system is better -- POU or central system?

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