40 CFR § 761.274 - Reporting PCB concentrations in samples.

---
identifier: "/us/cfr/t40/s761.274"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 761.274 - Reporting PCB concentrations in samples."
title_number: 40
title_name: "Protection of Environment"
section_number: "761.274"
section_name: "Reporting PCB concentrations in samples."
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---


# 761.274 Reporting PCB concentrations in samples.

(a) Report all sample concentrations for non-liquid PCBs on a dry weight basis as micrograms of PCBs per gram of sample (ppm by weight). Report surface sampling results as µg/100 cm
<sup>2</sup>. Divide 100 cm
<sup>2</sup> by the surface area and multiply this quotient by the total number of micrograms of PCBs on the surface to obtain the equivalent measurement of micrograms per 100 cm
<sup>2</sup>.

(b) Report all sample concentrations for liquid PCBs on a wet weight basis as micrograms of PCBs per gram of sample (ppm by weight).