---
kind: "section"
citation: "40 C.F.R. § 60.6590"
title: "40"
number: "60.6590"
heading: "What records must I keep for stack tests?"
url: "https://uscodex.org/cfr/40/60.6590"
---

# §60.6590. What records must I keep for stack tests?


For stack tests required under [§ 60.6515](/cfr/40/60.6515.md), you must keep records of all the following four items:

- (a) The results of the stack tests for eight pollutants or parameters recorded in the appropriate units of measure specified in Table 3 to [Subpart WWWW](/cfr/40/subpartWWWW.md):
  - (1) **Dioxins/furans.**
  - (2) **Cadmium.**
  - (3) **Lead.**
  - (4) **Mercury.**
  - (5) **Opacity.**
  - (6) **Particulate matter.**
  - (7) **Hydrogen chloride.**
  - (8) **Fugitive ash.**
- (b) **Test reports including supporting calculations that document the results of all stack tests.**
- (c) The maximum demonstrated load of your municipal waste combustors and maximum temperature at the inlet of your particulate matter control device during all stack tests for dioxins/furans emissions.
- (d) **The calendar date of each record.**

## Notes

### Source

Source: 91 FR 11860, Mar. 10, 2026, unless otherwise noted.

### Authority

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

### Source

Source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.