---
kind: "section"
citation: "40 C.F.R. § 766.1"
title: "40"
number: "766.1"
heading: "Scope and purpose."
url: "https://uscodex.org/cfr/40/766.1"
---

# §766.1. Scope and purpose.

- (a) This part identifies requirements for testing under section 4 of the Toxic Substances Control Act (TSCA), [15 U.S.C. 2603](/usc/15/2603.md), to ascertain whether certain specified chemical substances may be contaminated with halogenated dibenzodioxins (HDDs)/dibenzofurans (HDFs) as defined in [§ 766.3](/cfr/40/766.3.md), and requirements for reporting under [section 8](/cfr/40/8.md) of TSCA, [15 U.S.C. 2607](/usc/15/2607.md).
- (b) [Section 766.35(b)](/cfr/40/766.35.md?p=b) requires manufacturers and processors of chemical substances identified in [§ 766.25](/cfr/40/766.25.md) to submit to EPA:
  - (1) Any existing test data showing analysis of the chemical substances for concentrations of HDDs/HDFs, applicable protocols, and the results of the analysis for HDDs/HDFs, (2) allegations of significant adverse reactions to HDDs/HDFs, compiled in accordance with [part 717](/cfr/40/part717.md) of this chapter, and (3) health and safety studies on the HDDs/HDFs, in accordance with applicable provisions of [part 716](/cfr/40/part716.md) of this chapter.
- (c) [Section 766.35(a)](/cfr/40/766.35.md?p=a) requires manufacturers and, under certain circumstances, processors of chemical substances identified in [§ 766.25](/cfr/40/766.25.md) to submit letters of intent to test and protocols for the analysis of the chemical substances for the presence of HDDs/HDFs. [Section 766.20](/cfr/40/766.20.md) requires these manufacturers and processors to test their chemical substances for the presence of HDDs/HDFs. Any submissions must be in accordance with the EPA Procedures Governing Testing Consent Agreements and Test Rules contained in [part 790](/cfr/40/part790.md) of this chapter and any modifications to such procedures contained in this part.
- (d) [Section 766.32](/cfr/40/766.32.md) specifies conditions under which persons required to test may request an exclusion or waiver from testing.
- (e) Deadlines for submission to EPA of protocols, reports, studies, and test results are specified in [part 790](/cfr/40/part790.md), [subpart C](/cfr/40/subpartC.md) and [§ 766.35](/cfr/40/766.35.md).
- (f) Sections [766.10](/cfr/40/766.10.md), [766.12](/cfr/40/766.12.md), [766.14](/cfr/40/766.14.md), [766.16](/cfr/40/766.16.md), and [766.18](/cfr/40/766.18.md) prescribe analytical methods required; [§ 766.27](/cfr/40/766.27.md) prescribes target levels of quantitation (LOQ) for each congener for which quantitation is required.
- (g) If results of existing tests or tests performed under this part indicate the presence of HDDs/HDFs in the identified chemical substance above the LOQ specified in [§ 766.27](/cfr/40/766.27.md), [§ 766.35(c)](/cfr/40/766.35.md?p=c) requires the following additional reporting on the specified chemicals: production, process, use, exposure and disposal data under [section 8(a)](/cfr/40/8.md?p=a) of TSCA; health and safety studies under [section 8(d)](/cfr/40/8.md?p=d) of TSCA; and reports of allegations of significant adverse reactions under [section 8(c)](/cfr/40/8.md?p=c) of TSCA. In some cases, additional reporting may be required of manufacturers reporting no contamination of the identified chemical substances under [§ 766.35(c)(2)](/cfr/40/766.35.md?p=c-2).
- (h) [Section 766.38](/cfr/40/766.38.md) requires manufacturers of chemical substances produced from chemical substances identified as possible precursors to HDD/HDF formation, to report on chemical substances produced from such precursors.

## Notes

### Authority

Authority: 15 U.S.C. 2603 and 2607.

### Source

Source: 52 FR 21437, June 5, 1987, unless otherwise noted.