Are there any threshold levels for determining the chemical constituents in an impoundment in order to complete table B-2?
There is no threshold limit. For completeness, EPA is interested in knowing about any quantities of the Appendix 2 chemicals that you reasonably expect to be present in the impoundment, based on your knowledge of the chemicals in use or produced at your facility. Complete Table B2 for Appendix 2 chemicals that you reasonably expect to be present, even if the chemical is present simply because of naturally occurring background levels in native soils or source water. You may annotate the survey to indicate the source of an Appendix 2 chemical if you know its source and the source is unrelated to your facility’s activities. Q: Question B3 requires facilities to identify all known groundwater supply wells within 2 kilometers of an in-scope surface impoundment. If a facility is located along a river, should the facility identify wells on the opposite side of the river? A: The facility should identify all known wells within 2 kilometers of the surface impoundment, regardless of any water bod
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