Ore City, New Diana School Busses Will Get Emisions Retrofits

ISD's will receive grants to install equipment that will reduce emissions from school bus diesel engines.

Students riding New Diana or Ore City buses will soon get a bit of fresh(er) air. Both ISD's have asked for, and will receive money to retrofit school buses from the Texas Clean School Bus Program.

The program, offered by the Texas Commission of Environmental Quality, is aimed at improving student and bus driver health by reducing the amount of pollutants they breath in while boarding and riding the bus.

According to information provided by the TCEQ, diesel exhaust contains small particles, known as fine particulate matter (PM). PM can easily pass through the nose and throat, penetrate deep into the lungs and pose serious health risks, including aggravated asthma and allergies. Some studies suggest that long-term exposure can increase the risk of lung cancer.

The information also says that children may be more susceptible to this pollution because they breathe more air per pound of body weight when compared to adults. In addition, as children’s respiratory systems are still developing, they are more susceptible than adults to environmental pollution.

To counter the risks, the grant money is to be used for the installation of any combination of the following devices:

* Diesel Particulate Filters - devices that collect particulate matter in the exhaust stream. Used with the correct fuel, these filters can reduce organic compounds, and carbon monoxide in the exhaust gases by 60 to 90 percent.

* Closed Crankcase Filtration Systems - devices that allow a diesel engine’s crankcase to be closed and use an air filter to trap oil droplets, carbon, traces of wear debris, and particles that are smaller than 10 micrometers in diameter. Blow-by gas emissions can be as much as 25 percent of the total emissions from a diesel engine. These systems may be more effective at reducing children’s in-cabin exposures to pollutants than control systems fitted into the exhaust systems alone.

* Diesel Oxidation Catalysts - devices that use a chemical process to break down pollutants in the exhaust stream into less harmful components. Diesel oxidation catalysts can reduce emissions of particulates by 20 to 40 percent, hydrocarbons by 50 percent and carbon monoxide by 40 percent.

* Partial Flow-Through Filters - tailpipe filters that can lower diesel particulate matter emissions by 70 to 75 percent. These can also reduce total vehicle emissions by up to 80 percent when paired with a closed crankcase filtration system.

The program does place limits on funding, based on the devices the ISD elects to install, and how many buses will be retrofitted. Closed crankcase filtration systems may receive up to $800, diesel oxidation catalysts up to $1,500, partial flow-through filters up to $6,000, and diesel particulate filters up to $8,250. These caps are per device and include installation costs.