Enviro Tech Expansion to Add 120 Helena Jobs by Luke Jones Posted 4/17/2013 01:07 pm Updated 5 years ago Enviro Tech Chemical Services of Modesto, Calif., is expected to create as many as 120 new jobs after its 110,000-SF facility in Helena is completed. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 15 days. Purchase Now Already have archive access? Login to view this article.