School Bus - Ward Clean Air Products

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Risk to Children

Air pollution from diesel vehicles has health implications for everyone, but children are more susceptible to this pollution than healthy adults because their respiratory systems are not fully developed. Children breathe 50 percent more air per pound of body weight than adults. Diesel exhaust contains significant levels of small particles, known as fine particulate matter. Exposure to particulate matter, especially fine particles, is associated with increased frequency of childhood illnesses.

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School Bus Solutions

Children who ride on a diesel school bus may be exposed to up to 4 times more toxic diesel exhaust than someone traveling in a car. A study found that diesel exhaust levels on school busses were 23-46 times higher than levels considered to be unsafe and a significant cancer risk according to the U.S EPA and federal guidelines. Exposure to untreated diesel exhaust can also be a factor in childhood asthma and lung disease.

Fortunately, the harmful components of diesel exhaust; particulate matter (PM), carbon monoxide (CO), and hydrocarbons (HC), are easily reduced with current and readily available technologies which provide immediate emissions reductions and hence immediate health benefits to the local population.

Ward Clean Air Products offers three retrofit solutions designed with school bus fleets in mind; which are both industry leading verified solutions*. In addition, our application engineering approach to your emission control mandate is the difference between a one-size-fits-all solution and a comfortable custom-fit solution insuring quick and easy installations:

	1. First is the diesel oxidation catalyst (DOC), available in two configurations:
		a. The AZ Purifier – offering 20-40%* reduction dependent on the vehicle
		b. AZ Purimuffler (a combined AZ Purifier catalyst and silencer solution to enhance the packaging of the DOC solution within the vehicle)

	2. The second is the Purifilter, a passively regenerating diesel particulate filter (DPF) which offers extraordinary and industry leading reductions of PM (90%*), HC and CO. ECS retrofit technology solutions offer superior performance at maximum cost effectiveness per retrofit dollar.

	3. A closed crankcase ventilation system which can be combined with either product above which will eliminate 100% of engine crankcase gases which studies have found penetrate the school bus cabin greatly impacting cabin air quality.
	These are solutions you can also feel good about, knowing your emission control dollars are serving the environment and the children well with the best verified solution in the industry*. Because particulate exposure increases exponentially with proximity to the source, reducing emissions with these retrofit technologies in the vicinity of people provides critical public health benefits and minimizes a person's exposure to these harmful emissions. The products offered by Ward Clean Air Products go through a strict testing and validation regime. WCAP holds more product certifications and verifications than our competitors. Letters of evaluation from agencies, testing results, and papers are readily available to our customers.

What Is Diesel Exhaust?

Diesel exhaust contains a mixture of thousands of different chemical substances. Many of the components of diesel exhaust, such as carbon monoxide, carbon dioxide, nitrogen oxides, sulphur dioxides, hydrocarbon gases and diesel particulate matter (soot), arsenic and benzene, can cause health problems. Diesel exhaust contains 20-100 times more harmful particles than gasoline exhaust.

Health Effects of Diesel Exhaust

Due to expanding use of diesel equipment, more and more workers are exposed to diesel exhaust. More than one million workers are exposed to diesel exhaust and face the risk of adverse health effects, ranging from headaches and nausea to cancer and respiratory disease. Such workers include mine workers, bridge and tunnel workers, railroad workers, loading dock workers, truck drivers, material handling machine operators, farm workers, longshoring employees, and auto, truck and bus maintenance garage workers.