English to Russian Marketing Environment & Ecology

Добрый день, господа переводчики
вот такой термин "CLOSURE COST ESTIMATES" в контексте, который представлен ниже:

Although in many Environmental reports closure cost estimates are discussed the detail is lacking. In many cases a ball park figure is arrived at and this figure is escalated probably using the Monte Carlo simulation technique or similar techniques.

Хотелось бы понять что же это такое? "Смета стоимости закрытия"?
Речь идет об оценочной компании, которая занимается: "We have valued assets in the Mining, Industrial, Commercial and Agriculture Sectors.
Our clients include companies quoted on the London, Toronto, Johannesburg and Paris Stock Exchanges, Major Industrial Companies and Agricultural Concerns"

Благодарю за ответы
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