Forms THM and HAA5 (Stage 2) Sample site plan (monitoring plan). Sample site change form (monitoring plan). Operational evaluation level (OEL) report template and worksheet. Calculations (do not submit to us). Locational running annual average (LRAA) - Online. Locational running annual average (LRAA) - MS Excel. Chlorite and chlorine dioxide Chlorite/Chlorine Dioxide (monitoring plan). Daily entry point chlorine dioxide and chlorite form (Instructions). Disinfection byproduct precursors Disinfection byproduct precursor compliance calculation form instructions. Disinfection byproduct precursor compliance calculation form. Guidance Total Trihalomethanes (TTHM) and Haloacetic Acids (HAA5) Fact Sheet. Disinfectants and Disinfection Byproduct Rule guidance handbook (2002). Quick guide: Disinfection Byproduct Precursors. Quick guide: Minimum disinfection for groundwater. Quick guide: Disinfectant residual. Color wheel.