For question C21a, how can I determine the type of aeration that occurs in my facilitys surface impoundment?

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For question C21a, how can I determine the type of aeration that occurs in my facilitys surface impoundment?

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The manufacturer of the aeration equipment may define its type in written materials supplied with the equipment. Q: We have a surface impoundment that we used until April 1995, when we stopped putting waste in it, and drained it. Your questions in section C ask about the latest three complete calendar years. Are we supposed to answer those questions for this surface impoundment, since we didn’t use it in the last three complete calendar years? A: Questions C15, C22, C23 and C24 all ask for data from the latest three complete calendar years the surface impoundment was in use. In your case, the latest three complete calendar years were 1992 through 1994. Please provide information for those years. Q: We have a surface impoundment that we used until July 1992, when we stopped putting waste in it, and drained it. Your questions in section C ask about the latest three complete calendar years we used the surface impoundment, which would be 1989, 1990, and 1991. But in the first survey you se

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