plant stockage

Hydrocarbon leaks on storage tanks

Prevent VOC emissions from storage tanks.


Whether the tanks have fixed or floating roofs, static storage containers and hydrocarbon movements generate VOC emissions in the surrounding air.
These emissions must be declared and it is therefore important to quantify them.

This service is split into two distinct fields:

  • empirical quantification of emissions using mathematical models such as those used by trade software (Tanks 4.09d, Tanks ESP, etc.)
  • leak detection and measurement of emissions at roof seals on storage tanks

In terms of quantification of emissions by measurement, Bureau Veritas has developed techniques to pinpoint the exact location of emissions sources and to quantify their associated rates.
Bureau Veritas also carries out inspections of hydrocarbon storage tanks using special infra-red cameras suited to detecting gas leaks.


The quantification of emissions from hydrocarbon storage tanks is required for annual administrative declarations (GEREP declaration in France, etc.). It is possible to quantify these emissions by applying emissions factors defined by the US EPA AP-42.

As a specialist in industrial data collection and database management, Bureau Veritas can manage all the phases required to quantify the emissions from your hydrocarbon storage tanks. Several software packages compliant with US EPA AP-42 can be used with our customers:

  • public version of Tanks 4.09d
  • pro version of TankESP
  • API 2517 factors
  • customer software

Bureau Veritas ensures data input, calculates emissions levels and produces a full report for the declaration of your emissions to the applicable authorities.


Our teams conduct leak testing on your storage tanks, around all skirting and feet, as well as floating roof seals.
Our extensive experience in this field has enabled us to develop a variety of methodologies using an array of leak detection tools.

This type of inspection aims to meet the following objectives:

  • detect leaks and failures
  • optimise maintenance programmes
  • reduce soil pollution
  • help reduce airborne emissions
  • quantify emissions

Using our pioneering methodology which can be drone-assisted when necessary, we detect and map out your biogas emissions in accordance with the Order of 15/02/2016.

Depending on customer requirements, we offer remote inspections with IR cameras specific to gas detection, or FID analyser measurements in contact with the VOC emission sources.
We can also quantify detected emissions, either using the conventional bagging technique or using our proprietary experimental methodology.