| SamplePurposeCode | SamplePurposeName | SamplePurposeDescr | | Algae | Algae Analysis | Algae Event either abundance or diversity, freshwater or marine |
| Benthics | Benthics Analysis | Benthic Event either abundance or diversity, freshwater or marine |
| FieldMeasure | Field Measure | Measurement taken in the field |
| Habitat | Non-Quantified Field Observations | Used to capture non-quantified Field Observations |
| SedChem | Sediment Chemistry Analysis | Sediment Event with Chem but no Tox Analysis |
| SedTox | Sediment Toxicity Analysis | Sediment Event with Tox Analysis but no Chem |
| TimeSeries | Time Series Event | Time Series Event |
| Tissue | Tissue Chemistry Analysis | Tissue Event with Chemistry Analysis |
| TissueAbun | Tissue Abundance | Tissue Abundance Event |
| VegChem | Vegetation Chemistry Analysis | Vegetation event with chemistry analysis |
| WaterChem | Water Chemistry Analysis | Water Event with Chemistry but no Tox Analysis |
| WaterTox | Water Toxicity Analysis | Water Event with Toxicity Analysis but no Chem |