---
kind: "section"
citation: "40 C.F.R. § 63.9915"
title: "40"
number: "63.9915"
heading: "What test methods and other procedures must I use to demonstrate initial compliance with dioxin/furan emission limits?"
url: "https://uscodex.org/cfr/40/63.9915"
---

# §63.9915. What test methods and other procedures must I use to demonstrate initial compliance with dioxin/furan emission limits?

- (a) You must conduct each performance test that applies to your affected source according to the requirements in [§ 63.7(e)(1)](/cfr/40/63.7.md?p=e-1).
- (b) To determine compliance with the applicable emission limit for dioxins/furans in Table 1 to this subpart, you must follow the test methods and procedures specified in paragraphs [(b)(1)](#b-1) and [(2)](#b-2) of this section.
  - (1) Determine the concentration of dioxin and furan according to the following test methods in appendix A to [40 CFR part 60](/cfr/40/part60.md):
    - (i) **Method 1 to select sampling port locations and the number of traverse points.** Sampling ports must be located at the outlet of the control device and prior to any releases to the atmosphere.
    - (ii) **Method 2, 2F, or 2G to determine the volumetric flow of the stack gas.**
    - (iii) **Method 3, 3A, or 3B to determine the dry molecular weight of the stack gas.**
    - (iv) **Method 4 to determine the moisture content of the stack gas.**
    - (v) **Method 23 to determine the concentration of dioxins/furans.** For each dioxin/furan congener measured in accordance with this paragraph (b)(v), multiply the congener concentration by its corresponding toxic equivalency factor specified in Table 2 of this subpart.
  - (2) **Collect a minimum sample of 100 dscf during each test run.** Three valid test runs are needed to comprise a performance test.

## Notes

### Source

Source: 68 FR 58620, Oct. 10, 2003, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.