Table 10. Station Class Codes used for EPA EMAP data
|
Code |
Explanation |
| BASE | Stations that were randomly selected based on EMAP sampling design (grid). |
| INDEX | Stations that were paired with small estuary and tidal river base sites. They were intended to represent the area of sediment deposition with the estuary or river. Not Random. |
| ITE | Indicator Testing and Evaluation Sites - only for '91. Selected specifically to test indicators' ability to discriminate between degraded and reference sites. |
| SUPPL | Stations that were randomly selected by using the emap grid design and reducing it to fit within a single estuary. |
| QA/QC | The replicate sampling of a Base station (Exact location) within a short time span. (Collection methods quality reference). |
| REP-91 | Between-year replicates of 1991 base sites. These 1991 sites were sampled every year to represent variation and long term trends. (No within-year replicates, see next definition) |
| REP-92 REP-93 REP-94 |
Randomly selected sites that are "near-by" to one another to evaluate variability REP-93 within a given area. (e.g., within a hexagon or small estuary). Used to test the REP-94 EMAP design |
| VARIANCE | Trend sites selected to evaluate variation and long term trends (Selected in addition to the REP-91 sites). |
Also, see http://www.epa.gov/emap/html/dataI/estuary/data/ for further information regarding the EMAP program.
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