Hydrogen sulfide (H2S) is very toxic and corrosive even at low levels. The occupational exposure limit is 10 ppm and the gas is fatal above 150 ppm. Corrosion due to H2S can lead to catastrophic failures, which may occur without warning. Consequently, the maximum permitted level of H2S in gas pipelines, for example, is typically less than 5 ppm.

Our H2S mitigation services comprise metering, monitoring and sampling in fields or at facilities, laboratory analysis, data interpretation and treating high H2S samples to remove H2S to non-detect (gases and hydrocarbon fluids). Our technology and program provides for the safe and controlled transfer of pressurized high H2S sample gases to Tedlar sample bags removing H2S to non-detect levels.

ISCT use a variety of ASTM and GPA methods for sampling, field testing and analysis of H2S. For our Texas clients we offer testing to comply with Statewide Rule 36:

• Color metric tubes (Storage Tanks Only)
• Tutweiler (titration method)
• Lead-acetate method (ASTM D4084)