(a) For each measurement or sample taken, the permittee shall maintain records of the following information:
  (1) the records required in §305.125(11)(C) of this title (relating to Standard Permit Conditions); and
  (2) the technique or method of analysis, including the results of adequate verifications of analytical precision and/or accuracy verified by means of the recommended guidelines in the Environmental Protection Agency manual entitled Handbook for Analytical Quality Control in Water and Wastewater Laboratories, which are to be determined on the day the analyses are performed. The permittee shall meet the quality control requirements specified in §319.6 of this title (relating to Quality Assurance).
(b) The permittee shall be subject to routine inspection of its compliance with subsection (a) of this section.
(c) All records and information resulting from the required monitoring activities shall be retained at the facility site in accordance with §305.125(11)(B) of this title.
(d) Unless otherwise specified in the permit, a discharge monitoring report or monthly effluent report must be submitted each month by the 20th day of the following month for each discharge which is described in the permit whether or not a discharge is made for that month.

Source Note: The provisions of this §319.7 adopted to be effective July 27, 1988, 13 TexReg 3514; amended to be effective November 12, 2020, 45 TexReg 8000