TEMPE, Ariz.--(BUSINESS WIRE)--Mobile Mini, Inc. (Nasdaq GS:MINI) today announced that it has signed a definitive agreement to purchase Houston, TX-based Evergreen Tank Solutions ("ETS"), a leading provider of specialty containment solutions, for $405 million in cash. ETS, which directly serves large, blue-chip customers in the petrochemical, industrial and energy sectors, is the leader in integrated liquid and solid containment solutions in the Gulf region, and is the third largest provider of