TM99-06 Change in the Parameter Code Used to Report Results for Chloramben Herbicide

The National Water Quality Laboratory (NWQL) analyzes filtered water samples for chloramben using laboratory schedules 2050 and 2051. The method actually determines the methyl ester of chloramben, but data have been reported as the acid form of chloramben. The NWQL will begin reporting chloramben, by using the parameter code for the methyl ester, beginning on the effective date of this memorandum. Personnel from the National Water Information System (NWIS) group will write a computer program that will correct the erroneous parameter codes currently (1999) listed in the database.