Other - Pneumatic Devices BreadcrumbsFAQs, Rule Subparts, Subpart W. Petroleum and Natural Gas Systems ChangedLast updated: 2 weeks ago Q600. Equation W-1, legend entry for GHGi includes reference to facilities listed in 98.230(a)(3) through (a)(8). However, reporting for this source (pneumatic device venting) is required only for onshore production.