Key legal question
Whether anticipatory emergency cleanup measures were permissible for an oil spill in zone B.
Extracted holding
Yes. The court held that anticipatory substitute performance can also be ordered for an oil spill occurring only in zone B.
Extracted reasoning
Zone B under the water protection ordinance still serves groundwater protection purposes and includes various preventive requirements. In an acute spill situation, immediate cleanup may be justified despite the less sensitive zone, even if in some cases a brief delay might be conceivable.