A natural gas-fired tunnel kiln was constructed in 1970 to replace the existing kiln. No permit has been issued for any sources at the plant. The facility currently produces 500,000 bricks per week or 26 million bricks per year. Dust from the crushing operation is controlled with a fine water mist, and the grinding room is enclosed and equipped with a cyclone type dust collection system. These stacks emit pollutants resulting primarily from raw material handling operations and operation of the tunnel kiln and dryer.
Particulate emissions result primarily from storing, crushing, and grinding the raw clay.
In this particular facility, the crushing operation is performed with a fine mist of water that minimizes the amount of dust created. The grinding room is enclosed and equipped with a cyclone type dust collection system. However, note that these controls are not considered for PTE calculations. Units are pounds of pollutant emitted per ton of brick produced. Again, PTE is based on 71,500 tons of bricks produced per year.