Air Quality Class
May 1st - May 9th, 2024

Waste and Water Class
March 19th - March 28th, 2024

Industrial Hygiene and Safety Class
April 2nd - April 10th, 2024

Learn More

Subscribe to our Newsletter

Sign up to receive semi-annual updates on various current and proposed environmental issues including air quality, hazardous waste & water, industrial hygiene, and more.

Home / News / Newsfeed / SJVAPCD Adopted Rule Changes – Fall 2023

SJVAPCD Adopted Rule Changes – Fall 2023

September 26, 2023
image of oil refineries at sunset
For more details regarding the changes discussed below, go to: https://ww2.valleyair.org/rules-and-planning/recent-actions/.

In June 2023, the San Joaquin Valley Air Pollution Control District (SJVAPCD) adopted amendments to the following rules to address Best Available Retrofit Control Technology (BARCT) and the United States Environmental Protection Agency’s (U.S. EPA’s) 2016 Control Techniques Guidelines (CTG) and establish more stringent leak detection and repair (LDAR) requirements for volatile organic compound (VOC) emissions from components associated with the production of oil and gas.

  • Rule 4401: Steam-Enhanced Crude Oil Production Wells;
  • Rule 4409: Components at Light Crude Oil Production Facilities, Natural Gas Production Facilities, and Natural Gas Processing Facilities;
  • Rule 4455: Components at Petroleum Refineries, Gas Liquids Processing Facilities, and Chemical Plants; and
  • Rule 4623: Storage of Organic Liquids, and Rule 4624: Transfer of Organic Liquid.

In general, the revised LDAR requirements begin after June 30, 2024, and include:

  • The definition of a minor gas leak for components other than pressure relief devices was typically lowered to 500 parts per million by volume (ppmv) as methane;
  • Generally, the component leak inspection frequency was modified to require quarterly inspections;
  • In some cases, the number of allowable leaks identified during inspections was reduced;
  • The allowable repair period for leaks was reduced to as short as 1 day;
  • Rule 4401, 4409, and 4455 exemptions for ½-inch or smaller stainless steel tube fittings have been removed;
  • For Rules 4401, 4409, and 4455, procedures are specified to request an extended repair period in the event a rig-up operation is required to complete the repair; and
  • Leaks detected by optical gas imaging (OGI) must be measured by U.S. EPA Method 21 to determine compliance with leak thresholds and repair timeframes.

Amendments to Rule 4623 may require additional VOC control systems. Tanks storing organic liquids with a true vapor pressure (TVP) of ≥0.1 pound per square inch absolute (psia) and <0.5 psia will require a pressure-vacuum release valve. Tanks with a potential to emit (PTE) of 6 tons per year (TPY) and actual emissions greater than 4 TPY will require a vapor control system if one is not already installed. For tanks required to install a VOC emission control device (including a pressure-vacuum relief valve), a permit application is due by March 31, 2024.

The Rule 4623 amendments also include new tank inspection requirements and leak repair timeframes as specified in Section 5.9. Pressure vessels, gasoline storage tanks <19,800 gallons, wine and spirits storage tanks, and clean-produced water storage tanks (with a PTE ≤6 TPY) are exempt from the requirements of Rule 4623.



Yorke Engineering specializes in air quality consulting and environmental consulting for stationary and mobile sources, including dispersion modeling, health risk assessments, permitting, emission inventories, air quality compliance systems, etc. Yorke Engineering has assisted over 1,800 customers, including a wide variety of industrial facilities and government organizations throughout California. Learn more about how we can help you here: Air Quality | Yorke Engineering, LLC (yorkeengr.com).

Main Office:

31726 Rancho Viejo Rd. Suite 218
San Juan Capistrano, CA 92675

Skip to content