ESI Membership The ESI has many members located across the state from a variety of business interests. Read below to learn how to become an ESI member! Application Process The DEQ Internal Workgroup coordinates compliance reviews of all applications and recommends Partner applicants for membership directly to DEQ's Secretary. All Rising Steward and Steward applicants receive an onsite verification visit by an ESI team to verify application information. These applications are reviewed annually in the spring and fall by the ESI Advisory Board. Following review, the Advisory Board then makes recommendations for membership. The final decision is up to the discretion of the DEQ Secretary. Apply to become an ESI member.