TM96-12 Change in the calculation of values for inorganic carbon, total in bottom material

When the National Water Quality Laboratory (NWQL) changed its computer program for calculating concentrations of inorganic carbon in sediment, we discovered that the old computer program was calculating the results incorrectly. A study, designed to estimate the magnitude of the error, demonstrated that the incorrectly calculated results were about 3 percent higher than the correctly calculated results. Although we cannot accurately establish the length of time that the incorrect calculation was used, we know that the length is at least 10 years or longer. The NWQL will implement the correct calculation beginning October 1, 1996.

Supersedes NWQL TM96-09