VOC Control Efficiency Compliance Test

Skyworks Solutions, Inc. (Skyworks) selected CK to perform a compliance emissions testing program to determine the control efficiency of a new Roto-Concentrator followed by a thermal oxidizer (RC/TOx) used to control volatile organic compounds/hazardous air pollutants (VOC/HAP) from multiple manufacturing processes.

A facility air permit condition required compliance testing of the subject RC/TOx to demonstrate, at minimum: a) whether or not the enclosures around each controlled process comply with the United States Environmental Protection Agency’s (USEPA) Alternative Method 020 as a means of demonstrating capture efficiency; b) the VOC and HAPs destruction/removal efficiency of the RC/TOx system; and c) the maximum hourly VOC and HAP emissions rate, after control, in pounds per hour.

CK prepared and submitted a pre-test protocol to MADEP following an on-site meeting which specifically addressed the upstream and downstream distance requirements for sampling locations contained in a permit condition. Utilizing inlet sampling locations that satisfied the permit condition would have required that measurements be made in three separate inlet ducts rather than a single “combined” inlet sampling location. It was agreed that the “combined” inlet location would be acceptable provided that the combined flow rate of three inlet sampling locations (measured using EPA Method 2) were comparable to the “combined” inlet flow rate (measured using a 3D probe).

Prior to compliance testing a flow evaluation was performed. The results of which demonstrated that flow rate at the “combined” inlet sampling location averaged 7.1% lower than the sum of the flow rate through the three individual inlet ducts. This comparison allowed inlet measurements during compliance testing to be performed at the single “combined” inlet location, thereby reducing the overall cost of testing.

The results of testing determined that the RC/TOx satisfies the VOC control requirement contained in the permit.