---
kind: "section"
citation: "40 C.F.R. § 98.485"
title: "40"
number: "98.485"
heading: "Procedures for estimating missing data."
url: "https://uscodex.org/cfr/40/98.485"
---

# §98.485. Procedures for estimating missing data.


Whenever the value of a parameter is unavailable or the quality assurance procedures set forth in [§ 98.484](/cfr/40/98.484.md) cannot be followed, you must follow the procedures set forth in Clause 9.2 of CSA/ANSI ISO 27916:19 (incorporated by reference, see [§ 98.7](/cfr/40/98.7.md)).


## Notes

### Source

Source: 89 FR 31948, Apr. 25, 2024, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.