PURPOSE: This rule describes the records that must be maintained for monthly release detection activity.

1. (1) All underground storage tank (UST) system owners and operators must maintain records in 10 CSR 26-2.034 demonstrating compliance with applicable release detection requirements in 10 CSR 26-2.040–10 CSR 26-2.048. These records must include the following:

   1. (A) All written performance claims of any release detection system used, and the manner in which these claims have been justified or tested by the equipment manufacturer or installer, must be retained for five (5) years from the date of equipment installation or for another reasonable period of time determined by the department;
   2. (B) The results of any sampling, testing, or monitoring must be retained for at least one

2. (1) year, or for another reasonable period of time determined by the department, except that—

   1. 1. The results of tank tightness testing

conducted in accordance with 10 CSR 26- 2.043(1)(D) must be retained until the next test is conducted; and

1. 2. The results of annual operability tests

of release detection equipment must be retained until the next test is performed; and

1. (C) Written documentation of all calibration, maintenance, and repair of release detection equipment permanently located onsite must be retained for at least one (1) year after the servicing work is completed. Any schedules of required calibration and maintenance provided by the release detection equipment manufacturer must be retained for five (5) years from the date of installation.

AUTHORITY: sections 319.105, 319.107, and 319.137, RSMo 2016.* This rule originally filed as 10 CSR 20-10.045. Original rule filed April 2, 1990, effective Sept. 28, 1990. Moved to 10 CSR 26-2.045 and amended: Filed April 15, 2011, effective Dec. 30, 2011. Moved to 10 CSR 26-2.048 and amended: Filed Aug. 15, 2016, effective May 30, 2017. *Original authority: 319.105, RSMo 1989; 319.107, RSMo 1989, amended 1994; and 319.137, RSMo 1989, amended 1993, 1995, 2004.