[#item_full_content]COSTA MESA, Calif. & HAMILTON, Ontario–(BUSINESS WIRE)–Astro Pak LLC (“Astro Pak”), a portfolio company of The Stephens Group, LLC (“Stephens Group”), is pleased to announce its acquisition of Purepass Services, Inc. (“Purepass”), a provider of on-site and shop-based high purity cleaning services. Located in Hamilton, Ontario, the acquisition establishes Astro Pak’s footprint in Canada and increases the total number of locations to 13 across the United States, Canada, and Puerto Rico. Purepas