10.20.430 Affirmative defense – Upset.
(1) For the purposes of this section, “upset” means an exceptional incident in which there is unintentional and temporary noncompliance with categorical pretreatment standards and requirements because of factors beyond the reasonable control of the industrial user. An upset does not include noncompliance caused by operational error, improperly designed treatment facilities, lack of preventative maintenance or careless or improper operation.
(2) An upset shall constitute an affirmative defense to an action brought for noncompliance with applicable pretreatment standards if the requirements of subsection (3) of this section are met.
(3) An industrial user who wishes to establish the affirmative defense of upset shall demonstrate, through properly signed, contemporaneous operating logs or other relevant evidence that:
(a) An upset occurred and the industrial user can identify the cause of the upset;
(b) The facility was at the time of the upset being operated in a prudent and workmanlike manner and was in compliance with applicable operation and maintenance procedures; and
(c) The industrial user has submitted the following information to the City within 24 hours of becoming aware of the upset (if this information is provided orally, a written submission must be provided within five days):
(i) Description of the discharge and cause of noncompliance;
(ii) The period of noncompliance, including exact dates and times or, if not corrected, the anticipated time the noncompliance is expected to continue; and
(iii) Steps being taken to reduce, eliminate and prevent recurrence of the noncompliance.
(4) In any enforcement proceeding, the industrial user seeking to establish the occurrence of an upset shall have the burden of proof.
(5) Industrial users will have the opportunity for a judicial determination on any claim of upset only in an enforcement action brought for noncompliance with applicable pretreatment standards.
(6) Industrial users shall control production of all discharges to the extent necessary to maintain compliance with applicable pretreatment standards upon reduction, loss or failure of their treatment facility until the facility is restored or an alternative method of treatment is provided. This requirement applies in the situation where, among other things, the primary source of power of the treatment facility is reduced, lost, or fails. (Ord. 106 § 9(6), passed 10-9-2012; Code 2014 § 52.09(F))