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(800)256-6110

Chain of custody (pdf)

Chain of custody instructions

Chain of Custody  (EXCEL)


Water and Wastewater 


Waste water from industries, municipalities, and communities can possibly contaminate rivers, lakes, even your own backyard. Therefore GSEL understands the importance of accurate testing and quick turn around time for your waste-water.  Our reports are simple to read, understand, and our knowledgeable staff are here to help with any questions you may have.  The majority of our waste-water testing are from clients issued EPA, NPDES or DEQ permits.


Some of our services for water and wastewater include:

  • BOD/CBOD
  • Total and Fecal Coliform
  • Ammonia
  • COD
  • TOC
  • Trace Metals
  • Cyanide
  • Chlorides
  • Oil&Grease
  • Total TPH
  • TPH Oil, Gasoline, and Diesel
  • Specific Gravity
  • Conductivity, Resisitivity
  • Phenol
  • Semi-Volatiles
  • BTEX
  • Fluorides
  • Nitrates, Nitrites
  • pH
  • Sulfides
  • Solids (Total, Suspended, Settleable)



GSEL offers a wide spectrum of water quality testing services ranging from Total Coliform Bacteria to Lead.  We provide testing for private well water for those who may who may be concerned about their well water quality.

Contact us today for your water testing needs!