The conversion factor is applied to the reported value from the source to obtain a value with standardized units.
| SOURCE PARAMETER NAME | SOURCE UNITS | DIE PARAMETER NAME | DIE PARAMETER UNITS | CONVERSION FACTOR | NOTES |
|---|---|---|---|---|---|
| - | m | - | ft | 3.28084 | Applies to all records where source and die parameter names are equivalent |
| - | ft | - | m | 0.3048 | Applies to all records where source and die parameter names are equivalent |
| - | ppm | - | mg/L | 1 | Applies to all records where source and die parameter names are equivalent |
| - | ug/L | - | mg/L | 0.001 | Applies to all records where source and die parameter names are equivalent |
| - | ton/ac-ft | - | mg/L | 735.47 | Applies to all records where source and die parameter names are equivalent |
| bicarbonate | mg/L as CaCO3 | bicarbonate | mg/L | 1.22 | equivalent mass HCO3 - = 61 |
| calcium | mg/L as CaCO3 | calcium | mg/L | 0.4 | equivalent mass Ca 2+ = 20 |
| carbonate | mg/L as CaCO3 | carbonate | mg/L | 0.6 | equivalent mass CO3 2- = 30 |
| nitrate as n | mg/L as N | nitrate | mg/L | 4.427 | - |
| nitrate | mg/L as N | nitrate | mg/L | 4.427 | - |
| nitrate | ug/L as N | nitrate | mg/L | 0.004427 | - |
| nitrate | mg/L as NO3 | nitrate | mg/L | 1 | - |
| sulfate as SO4 | mg/L | sulfate | mg/L | 1 | - |
| sulfur sulfate | mg/L | sulfate | mg/L | 1 | - |
| uranium | pCi/L | uranium | mg/L | 0.00149 | conversion factor source |
mg/L as CaCO3 = mg/L * (equivalent mass CaCO3/equivalent mass analyte)
mg/L = mg/L as CaCO3 * (equivalent mass analyte/equivalent mass CaCO3)
where equivalent mass analyte = atomic mass analyte/valency analyte
so equivalent mass CaCO3 = (equivalent mass Ca 2+) + (equivalent mass CO3 2-) = 40/2 + (12+3*16)/2 = 50
mg/L * (molecular weight N/molecular weight NO3) = mg/L as N
mg/L = mg/L as N * (molecuar weight NO3/molecular weight N)
where molecular weight N = 14.007 g/mol and molecular weight NO3 = (14.007+15.999*3) = 62.004 g/mol
ug/L = pCi/L * 1.49
Records with the following source parameter names, source units, die parameter names, and die parameter units are not included in the output.
| SOURCE PARAMETER NAME | SOURCE UNITS | NOTES |
|---|---|---|
| - | tons/day | This is not a unit of concentration |
| - | mg/kg | This is not a unit of aqueous concentration |
| sodium | % | This is "Sodium fraction of cations, water, percent in equivalents of major cations" - see USGS pcode 00932 |