[#item_full_content]COSTA MESA, Calif. & FREMONT, Calif.–(BUSINESS WIRE)–Astro Pak LLC (“Astro Pak”), a portfolio company of The Stephens Group, LLC (“Stephens Group”), is pleased to announce its acquisition of Clean Sciences, LLC (“Clean Sciences”), a precision cleaning services provider. The acquisition expands Astro Pak’s cleanroom footprint into Northern California, while also expanding its service capabilities and its semiconductor and defense end market expertise. Clean Sciences will supplement and complem