Reports
Biotic Ligand Model

Biotic Ligand Model

The Biotic Ligand Model (BLM) takes into account many environmental conditions in order to determine if a metal exists in a form or concentration that is toxic to aquatic life.  Toxicity is usually based upon the dosage of whatever it is that we are looking at.  At...

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TCLP or SPLP on a Solid Sample

TCLP or SPLP on a Solid Sample

Why is this TCLP/SPLP on a solid sample a common question? The main reason is that people don’t understand the difference between characterization and hazardous determination.  The EPA developed the TCLP Program to determine when certain materials have to go to a...

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What does Cation/Anion Balance Mean?

What does Cation/Anion Balance Mean?

Introduction to Cation/Anion Balance (CA Balance) Water that is potable (drinkable) should be electrically neutral.  This is determined by taking into account results from the following analytical testing: pH, conductivity, total dissolved solids, and other analytical...

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Understanding Control Charts

Understanding Control Charts

What are control charts? Control charts are a visual depiction of ongoing data points that various statistics are applied to.  The EPA used to require a laboratory to adjust its spike acceptance recovery percentage based upon how spikes were recovered over time...

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