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Pretreatment Industrial Users General Permit Conditions Page 9of14 d. Users ars required to notify the City of Stockton, Environmental Control Office, Immediately of any changes at its facility affecting the potential for a Slug Discharge. 32. Notification of Changed Conditions: Each User must notify the City of Stockton, Environmental Control Office, of any significant changes to the User's operations or system which might alter the nature, quality, or volume of its wastewater at least ninety (90) days before the change. a. The City of Stockton may require the User to submit such information as may be deemed necessary to evaluate the changed condition, including the submission of a wastewater discharge permit application, b. The City of Stockton may issue an individual wastewater discharge permit or modify an existing wastewater discharge permit in response to changed conditions or anticipated changed conditions. 33. Notification of Bypass: For the purposes of this Section, Bypass means the intentional diversion of wastestreams from any portion of a User's treatment facility. a. If a User knows in advance of the need for a bypass, it shall submit prior notice to the City of Stockton, Environmental Control Office, at least ten (10) days before the date of the bypass, if possible. b. A User shall submit oral notice to the City of Stockton, Environmental Control Office, of an unanticipated bypass within twenty-four (24) hours from the time it becomes aware of the bypass. A written submission shall also be provided within five (5) days of the time the User becomes aware of the bypass. The written submission shall contain a description of the bypass and its cause; the duration of the bypass, including exact dates and times, and, if the bypass has not been corrected, the anticipated time it is expected to continue; and steps taken or planned to reduce, eliminate, and prevent reoccurrence of the bypass. 34. Upset Provision: For the purposes of this Section, upset means an exceptional incident in which there is unintentional and temporary noncompliance with local and/or categorical Pretreatment Standards because of factors beyond the reasonable control of the Industrial User. An Upset does not include noncompliance to the extent caused by operational error, improperly designed treatment facilities, inadequate treatment facilities, lack of preventive maintenance, or careless or improper operation.