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Underground Injection on-site to Class I Wells Underground injection is the subsurface emplacement of fluids through wells. TRI chemicals associated with manufacturing, the petroleum industry, mining, commercial and service industries, and Federal and municipal government related activities may be injected into class I, II, III, IV, or V wells, if they do not endanger underground sources of drinking water (USDW), public health or the environment. Class I wells are industrial, municipal, and manufacturing related wells which inject fluids into deep, confined and isolated formations below potable water supplies. Data from Section 5.4.1 on the TRI Form R. Prior to reporting year 1996, these amounts were included in Section 5.4 (underground injection).


Disposal or Other Release Reports Metadata


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