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Regulatory frameworks

This page describes the regulatory frameworks that WS.PEMS supports. For each framework, it gives what the framework requires, what the product calculates, and which report produces the result. The product supplies the calculations and the records. The operator remains responsible for the permit, the submission and the verification.

EU Industrial Emissions Directive (stationary plants)​

What the framework requires​

The Industrial Emissions Directive regulates the emissions of large industrial installations in the EU, such as combustion plants. The permit of each installation sets emission limit values for pollutants such as NOx, SO2, CO and dust. For large combustion plants, Annex V of the Directive sets how the operator monitors these pollutants. It also sets how to form validated hourly and daily averages, and when the plant complies with its limits. National rules and the permit add details. EN 17255-1 specifies how a data acquisition and handling system processes the measured values into these averages.

What the product calculates​

  • Short-term averages (STA) for each interval of the regime, normally each hour.
  • Standardized averages (SSTA) at the reference oxygen content of the permit.
  • Validated averages (VSTA), with the uncertainty deducted. The regime selects a deduction relative to the value or relative to the emission limit, and the percentage for each component.
  • Daily long-term averages from the valid hourly values, with a daily validity rule. Monthly and yearly averages are also available.
  • The applicable emission limit for each period. The selection can depend on the fuel, a tag threshold such as load, the plant status and a validity window.
  • Separate gas and liquid averages for plants that use more than one fuel.
  • The number of OTNOC hours (other than normal operating conditions), from conditions that you define.
  • Counts of reportable and invalid periods, for data availability.
  • Emission masses for a period, for example the annual NOx mass.

When a long-term average exceeds its limit, the product raises an ELV exceedance alarm.

Reporting periods and emission limits explains these calculations.

Which report produces it​

A report template defines the columns of the compliance report: the tags, the averaging level (STA, SSTA or VSTA), the fuel and the unit. The ordinary report shows the hourly or daily values with their quality, the totals and the named results, such as the number of invalid periods. A composed report can arrange the same values as a document, for example a daily compliance grid for each emission source of an asset. Every reported value has data lineage back to the per-minute records.

See Generate a report, Composed reports and Report data lineage.

Official references​

  • Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions (integrated pollution prevention and control), with its later amendments: EUR-Lex
  • EN 17255-1, Stationary source emissions, data acquisition and handling systems. The standard is available from the national standards bodies.

OGMP 2.0 (methane from oil and gas)​

What the framework requires​

The Oil and Gas Methane Partnership 2.0 (OGMP 2.0) is a voluntary reporting framework of the United Nations Environment Programme. Member companies report the methane emissions of their assets every year. They report the emissions for each source category. A reporting level describes the quality of each estimate. The highest level reconciles the source-level estimates with independent measurements at site level.

What the product calculates​

  • The methane mass flow of each emission source, from its model. The model can be a first-principle combustion model or a custom model for a source category. The custom models include, for example, flaring, leaks, venting and purging, and pneumatic devices.
  • The methane mass for a period, for example a year, through a report column that sums the mass.
  • The CO2-equivalent mass, through a report column with the CO2-equivalent conversion.

Which report produces it​

A report template with methane mass columns gives the annual mass for each emission source. A composed report can present the annual inventory of an asset as one document. It can repeat a section for each emission source. The OGMP submission also needs company information. Examples are the reporting level and the method of each source, the ownership share and the site-level reconciliation records. You can add this information to the composed report as text.

Official references​