---
kind: "section"
citation: "40 C.F.R. § 270.23"
title: "40"
number: "270.23"
heading: "Specific part B information requirements for miscellaneous units."
url: "https://uscodex.org/cfr/40/270.23"
---

# §270.23. Specific part B information requirements for miscellaneous units.


Except as otherwise provided in [§ 264.600](/cfr/40/264.600.md), owners and operators of facilities that treat, store, or dispose of hazardous waste in miscellaneous units must provide the following additional information:

- (a) **A detailed description of the unit being used or proposed for use, including the following—**
  - (1) Physical characteristics, materials of construction, and dimensions of the unit;
  - (2) Detailed plans and engineering reports describing how the unit will be located, designed, constructed, operated, maintained, monitored, inspected, and closed to comply with the requirements of §§ [264.601](/cfr/40/264.601.md) and [264.602](/cfr/40/264.602.md); and
  - (3) For disposal units, a detailed description of the plans to comply with the post-closure requirements of [§ 264.603](/cfr/40/264.603.md).
- (b) Detailed hydrologic, geologic, and meteorologic assessments and land-use maps for the region surrounding the site that address and ensure compliance of the unit with each factor in the environmental performance standards of [§ 264.601](/cfr/40/264.601.md). If the applicant can demonstrate that he does not violate the environmental performance standards of [§ 264.601](/cfr/40/264.601.md) and the Director agrees with such demonstration, preliminary hydrologic, geologic, and meteorologic assessments will suffice.
- (c) Information on the potential pathways of exposure of humans or environmental receptors to hazardous waste or hazardous constituents and on the potential magnitude and nature of such exposures.
- (d) For any treatment unit, a report on a demonstration of the effectiveness of the treatment based on laboratory or field data.
- (e) Any additional information determined by the Director to be necessary for evaluation of compliance of the unit with the environmental performance standards of [§ 264.601](/cfr/40/264.601.md).

## Notes

### Authority

Authority: 42 U.S.C. 6905, 6912, 6924, 6925, 6927, 6939, and 6974.

### Source

Source: 48 FR 14228, Apr. 1, 1983, unless otherwise noted.