TM93-05 Establishment of one analytical range for silica method

This technical memorandum is to inform the Districts of the use of a single analytical range used to determine silica (Lab Code 56, WATSTORE 00955, TWRI I-2700-85) utilizing a new Alpkem autoanalyzer, which has been in operation since October 20, 1992. This single analytical range replaces a single range system utilizing an old Technicon autoanalyzer which was recently found not capable of achieving the stated method detection level of 0.1 mg/L.