IEST publishes two new contamination control RPs


The Institute of Environmental Sciences and Technology (IEST) has published two new Recommended Practices (RPs)-one provides guidance for maintaining a cleanroom at the level for which it was designed, and the other covers the design and testing of modular gas-phase adsorber cells in single pass or recirculating air-cleaning systems where high-efficiency removal of gaseous contaminants is required.

IEST-RP-CC018.4: Cleanroom Housekeeping: Operating and Monitoring Procedures includes a new test procedure to establish frequency, monitor effectiveness, and determine appropriate levels of surface cleanliness. The RP incorporates a new surface cleaning efficiency test method for nonviable particles. The test provides an automated measurement of surface cleanliness as it pertains to the efficiency of a wiping material to remove liquid contaminants from a surface. The document also has an expanded section on housekeeping equipment and supplies.

IEST-RP-CC008.2: High-efficiency Gas-phase Adsorber Cells discusses three types of modular cells in detail, including new material on Type IV (vee-bed) cells. The RP incorporates allowable materials, design, construction, quality assurance requirements, and packaging and shipping for adsorber cells. Appendices in the document cover recommended installation requirements, calculation of residence time of adsorber cells, and recommendations for ordering, marking, and shipping.

For more information or to order the document, visit or call IEST at 847-981-0100.