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NSI products are now available on our new website at zeptometrix.com.

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Environmental Reference Materials
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Environmental Wastewater Standards

Environmental Reference Materials

VOCs in Soil – Low Level #SPEO-008L

Environmental Reference Materials

VOCs in Soil – Mid Level #SPEO-008H

Drinking Water (WS) PTs

WS – Carbamate Pesticides #PEO-001

Drinking Water (WS) PTs

WS – Chloral Hydrate #PEO-077

Drinking Water (WS) PTs

WS – Chlorinated Acid Herbicides #PEO-123

Inorganics - WS PT

WS – Color #PEI-131

Inorganics - WS PT

WS – Corrosivity #PEI-142

Inorganics - WS PT

WS – Cyanide #PEI-015

Drinking Water (WS) PTs

WS – Diquat/Endothall/Glyphosate/Paraquat #PEO-097

Drinking Water (WS) PTs

WS – EDB/DBCP/TCP #PEO-007-4

Inorganics - WS PT

WS – Hardness #PEI-145

Inorganics - WS PT

WS – Hexavalent Chromium #PEI-128

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