MBTA Trimester Report Bus Emissions
Testing conducted from 12-10-2007 to 4-09-2008 All buses flagged as high emitters were removed from service, repaired, and retested prior to returning to revenue service.
Trimester Summary
Depots Tested # Buses Tested # Individual Tests # Screened for Retest Charlestown, Arborway, Fellsway, Lynn, Albany St, Cabot, Southampton, Quincy 748 1520 9
Repair Summary
Bus # 458 2176 6001 2197 2149 2264 2299 2229 2168 Fuel Type ECD Diesel CNG CNG CNG CNG CNG CNG CNG CNG Reason Carbon Monoxide/Hydrocarbons Hydrocarbons/Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Oxides of Nitrogen Repair cleaned diesel particulate filter replaced catalytic converter, spark plugs and coils. changed Electronic Control Module. plugs, o2 sensor, reset air fuel ratio tables. tune up, changed closed crankcase vent filter and diaphragm. changed catalytic converter. changed catalytic converter, o2 sensor AFR tables. plugs, coils, diaphragm. changed turbo, spark plugs.