40 CFR § 761.267 - Sampling non-porous surfaces.

---
identifier: "/us/cfr/t40/s761.267"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 761.267 - Sampling non-porous surfaces."
title_number: 40
title_name: "Protection of Environment"
section_number: "761.267"
section_name: "Sampling non-porous surfaces."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "R"
subchapter_name: "TOXIC SUBSTANCES CONTROL ACT"
part_number: "761"
part_name: "POLYCHLORINATED BIPHENYLS (PCBs) MANUFACTURING, PROCESSING, DISTRIBUTION IN COMMERCE, AND USE PROHIBITIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 2605, 2607, 2611, 2614, and 2616 and 42 U.S.C. 6939g."
regulatory_source: "43 FR 7156, Feb. 17, 1978, unless otherwise noted."
cfr_part: "761"
---


# 761.267 Sampling non-porous surfaces.

(a) Sample large, nearly flat, non-porous surfaces by dividing the surface into roughly square portions approximately 2 meters on each side. Follow the procedures in § 761.302(a) with the exception of the sampling grid size.

(b) It is not necessary to sample small or irregularly shaped surfaces.

[63 FR 35464, June 29, 1998, as amended at 88 FR 59695. Aug. 29, 2023]