Leak detection and fugitive emissions estimates of natural gas transportation.

EHS Techniques was commissioned for a three year LDAR survey of a Natural Gas transportation network in Europe. During the 2013-2015 survey, a total of 120 regulation nodes, 15 compression stations, 3 LNG plants and 3 deep underground storage facilities (onshore & offshore) were monitored.

Client specific factors has resulted in an underestimation of 8% to 9% compared to those average HFS emission factors basically because there were some type of components without specific fac- tors (big flanges, pig traps, big connectors, etc.) and the lack of enough representative HFS results.

Results will be used to report GHG fugitive emissions of the company and future surveys are now in development.


The Spanish subsidiary of one of the largest multinationals in the world and recognized globally for its concern for environmental issues has spent years engaging the services of EHS Techniques to bring their Environmental Management System based on ISO 14001. In turn also EHS Techniques provides outsourcing support in its Product Safety and Toxicology department in the implementation of REACH.

SLDAR. Fugitive emissions in upstream oil production facilities, Oman

EHS Techniques, because of its extensive experience in LDAR methodology, was required for conducting a SLDAR campaign according to USEPA Method 21 in oil production facilities located in the desert of Oman.

Within this campaign wellheads , 3 oil early processing facilities and several valve and manifolds nodes were monitored.

Examination of environmental disaster

EHS Techniques was commissioned by one of the main worldwide insurance brokers to assess on a major environmental accident occurred in a hazardous waste treatment facility in Spain. Spill to be assessed was impacting soils, groundwater and watershed including farming and industrial receptors. Damages were estimated in more than 2 MM Eur.

Elaboration of the Baseline Report (“Informe Base”) for three pharmaceutical companies in Catalonia, including site assessment for all three and soil and groundwater remediation for two of them.

Many regional governments in Spain are requesting Baseline Reports, and EHS has got a significant experience in preparing them.

In addition, in some cases we have detected site contamination, and this has implied the need of doing additional site assessments and/or remediation, using technologies such as bioslurping, pump and treat, ISCO, enhanced bioremediation, etc.

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