The following remark codes may appear with data in this report:
| PRINT OUTPUT | REMARK |
|---|---|
| E | Estimated value. |
| > | Actual value is known to be greater than the value shown. |
| < | Actual value is known to be less than the value shown. |
| S | Snowfall-affected precipitation |
| K | Results based on colony count outside the acceptance range (non-ideal colony count). |
| L | Biological organism count less than 0.5 percent (organism may be observed rather than counted). |
| D | Biological organism count equal to or greater than 15 percent (dominant). |
| V | Analyte was detected in both the environmental sample and the associated blanks. |
| & | Biological organism estimated as dominant. |
| * | Biological organism present in qualitative sample. |
| P | Biological organism in pupal life stage. |
| LV | Biological organism in larval life stage. |
| A | Biological organism in adult life stage. |
NOTE.--Traditionally, dissolved trace-element concentrations have been reported at the microgram per liter (ug/L) level. Recent evidence, mostly from
large rivers, indicates that actual dissolved-phase concentrations for a number of trace elements are within the range of 10's to 100's of
nanograms per liter (ng/L). Data above the ug/L level should be viewed with caution. Such data may actually represent elevated environmental
concentrations from natural or human causes; however, these data could reflect contamination introduced during sampling, processing, or
analysis. To confidently produce dissolved trace-element data with insignificant contamination, the U.S. Geological Survey began using new
trace-element protocols at some stations in water year 1994 (Horowitz, A.J. and others, 1994).