40 CFR § 60.4372a - How can I demonstrate compliance with my SO emissions standard using records of the fuel sulfur content?

---
identifier: "/us/cfr/t40/s60.4372a"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.4372a - How can I demonstrate compliance with my SO emissions standard using records of the fuel sulfur content?"
title_number: 40
title_name: "Protection of Environment"
section_number: "60.4372a"
section_name: "How can I demonstrate compliance with my SO emissions standard using records of the fuel sulfur content?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---


# 60.4372a How can I demonstrate compliance with my SO emissions standard using records of the fuel sulfur content?

(a) If you elect to demonstrate compliance with a SO<sub>2</sub> emissions standard according to § 60.4333a(d)(3), you must maintain on-site records (such as a current, valid purchase contract, tariff sheet, or transportation contract) documenting that total sulfur content for the fuel combusted in your stationary combustion turbine at all times does not exceed the conditions specified in paragraph (b) through (e) of this section, as applicable to your stationary combustion turbine.

(b) If your stationary combustion turbine is subject to the SO<sub>2</sub> emissions standard in § 60.4330a(a), then the fuel combusted must have a potential SO<sub>2</sub> emissions rate of 26 ng/J (0.060 lb/MMBtu) heat input or less.

(c) If your stationary combustion turbine is subject to the SO<sub>2</sub> emissions standard in § 60.4330a(b), then the total sulfur content of the gaseous fuel combusted must be 650 (mg/scm) (28 gr/100 scf).

(d) If your stationary combustion turbine is subject to the SO<sub>2</sub> emissions standard in § 60.4330a(c) or (d), the total sulfur content of the fuel combusted must be:

(1) For natural gas, 140 gr/100 scf or less.

(2) For fuel oil, 0.40 weight percent (4,000 ppmw) or less.

(3) For other fuels, potential SO<sub>2</sub> emissions of 180 ng/J (0.42 lb/MMBtu) heat input or less.

(e) Representative fuel sampling data following the procedures specified in section 2.3.1.4 or 2.3.2.4 in appendix D to part 75 of this chapter documenting that the fuel meets the part 75 requirements to be considered either pipeline natural gas or natural gas. Your stationary combustion turbine may not cause to be discharged into the atmosphere any gases that contain SO<sub>2</sub> in excess of:

(1) 110 ng SO<sub>2</sub>/J (0.90 lb SO<sub>2</sub>/MWh) gross energy output or 26 ng SO<sub>2</sub>/J (0.060 lb SO<sub>2</sub>/MMBtu) heat input; or

(2) 780 ng SO<sub>2</sub>/J (6.2 lb SO<sub>2</sub>/MWh) gross energy output or 180 ng SO<sub>2</sub>/J (0.42 lb SO<sub>2</sub>/MMBtu) heat input if your combustion turbine is in a noncontinental area.