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CSAPR (Cross-State Air Pollution Rule) Overview Information

FIP - Federal Implementation PlanSIP - State Implementation Plan

The Cross-State Air Pollution Rule (CSAPR) is a new set of standards for controlling how much oxides from nitrogen (NOX) and sulfur dioxide (SO2) (which combine and become ozone and fine PM that travel downwind and across state lines. These standards are an enforceable Federal Implementation Plan (FIP). Individual States can elect to replace the FIP with their own State Implementation Plan (SIP). These implementation plans use tradable air permits to reduce emissions. Every State has its own set of required emissions reduction.

CSAPR divides the states required to reduce SO2 into two groups. During Phase I, both groups must reduce their SO2 emissions.  States located in Group 1 must make additional reductions in SO2 emissions during Phase II to eliminate their contribution to air quality problems in downwind areas. (

Compliance can be done in may ways.  Including the use low sulfur coal, increased maintenance, or technologies such as scrubbers, dry sorbent injection, and low NOX burners. SAS Global can assist in reducing these emissions through boiler testing, tuning, and patented equipment.