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 articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.