What are the numbers that appear in the “Parameter” box of the preprinted DMR?
These are code numbers used by EPA’s PCS (Permit Compliance System) to enter data to the computer. The first (a 5-digit code), is specific to the printed parameter name in that box. The next single digit, is a code specific to the printed monitoring location. The next digit is a code number used by the computer to specify seasonal spans for parameters (if seasonal limits are involved), and the last digit is a sequential modification number used to specify any limit changes that may have occurred during the 5-year permit renewal period. These codes are of no concern to the permittee, but are necessary for data entry.
