Oil and Grease Errata
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Errata Sheet: Method 1664 (April 1995)
This errata sheet modifies Method 1664 to correct the definition of the variable "x" in Equation 1. This variable was originally defined as the "Concentration in each sample". The correct definition is "% recovery in each sample". This change is reflected in Equation 1 below.