TM01-02 Recalculation of bromide concentration (lab code 1246)

The National Water Quality Laboratory (NWQL) will change the calculation used to determine bromide concentration, Lab Code 1246 (Test ID 71870E), for samples logged in after March 31, 2001 (Julian Date 90). The calculation historically used to determine bromide concentration overcorrected for iodide interference, resulting in bromide values that were lower than expected for some samples. (NOTE: Bromide results for Lab Code 1258 are unaffected.)