I saw on the website for the California Department of Toxic Substances Control (DTSC), the agency that regulates hazardous waste, that they had a settlement with Heavenly Valley ski area for certain violations primarily related to managing their used oil at a maintenance shop. The total fines and fees excluding their legal fees was $150,000. Curiously, I searched and did not find any reported news articles.
From my experience, most fines are much less than that, so there must have been other factors that ratcheted up the amount. Factors can include: a long term pattern of noncompliance; potential for severe impact on the environment; or endangering human health.
As an Epic Local Passholder (Northstar, Heavenly, Kirkwood), I sent an email to Vail resorts expressing my displeasure with their performance. If anybody has an email for management at Heavenly, I will send it to them as well.