Janzen-Wahl LLC, formerly U.S. Clean Lab and The Janzen Wahl Group, is now under new ownership and has reopened for business.We are a proven industry leader in high quality cleaning and precision testing services. Since 1999 Janzen-Wahl has served the aerospace and defense industries nationally with innovative and unmatched precision cleaning, engineering, and verification processes. The Janzen Wahl Group was founded by Douglas Wahl (1954-2014) in 1999. As an experienced engineer in the aerospace industry, he realized the need a for high quality precision cleaning firm to serve this market. Based in Tucson Arizona, the company now fills that need as a national supplier of precision cleaning services to numerous industry segments. Janzen-Wahl is now led by experienced staff members who epitomize the founders' values and passion for excellence.