---
type: threshold
id: limestone-calcium-carbonate-see-particulates-not-otherwise-regulated
asset: workplace-exposure-limits
title: "Limestone; calcium carbonate; see Particulates not otherwise regulated — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side"
sources:
  - https://www.dir.ca.gov/title8/5155.html
source_quote: "1317653 | | Limestone; calcium carbonate; see Particulates not otherwise regulated"
generated: true
harvested: 2026-08-05
stale_after: 2027-08-05
substance: "Limestone; calcium carbonate; see Particulates not otherwise regulated"
verified: true
---
**Substance:** Limestone; calcium carbonate; see Particulates not otherwise regulated

> 1317653 | | Limestone; calcium carbonate; see Particulates not otherwise regulated

Source: <https://www.dir.ca.gov/title8/5155.html>