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--, CITY OF STOCKTON PRETREATMENT INDUSTRIAL USERS GENERAL PERMIT CONDITIONS (Revised April 2017) Permittee shall not allow any materials or any liquid waste to be discharged into the City of Stockton sewer system which could be harmful to the system or create a hazard or nuisance, as defined in sections 13.08.100 through 13.08.290 of the Stockton Municipal Code (SMC). If the permittee is found to be responsible for damage to the City of Stockton stormwater or sanitary sewer system, or for the excessive deposits of objectionable miterials in said systems, permittee may be required to bear the cost to the City for cleaning, or shall restore the affected part of the system to proper working condition. A violation of any provision of these permit conditions, local codes, state codes, federal codes or Federal Pretreatment Regulations may result in civil and/or criminal actions and fines of up to $25,000 per calendar day for each violation. 2. Permittee shall not allow any pollutants, including oxygen demanding pollutants BOD, TSS, etc.) to be released at a flow rate and/or pollutant concentration which the permittee knows, or has reason to know, will cause interference to the Publicly Owned Treatment Works (POTW). In no case, shall a sudden, unexpected discharge have a flow rate or contain concentrations of qualities of pollutants that exceed for any time period longer than 15 minutes more than five times the average 24-hour concentration, quantities, or flow during normal operation (SMG 13.08.100). �r 3. Permittee shall insure that all pretreatment facilities, including but not limited to flow, pH temperature and lower explosive limit (LEL) measuring, recording and sampling equipment, are operational and maintained in proper working order at all times; and that flow, pH, temperature and LEL measuring and recording devices are certified for accuracy by an approved qualified licensed technician prior to the initial discharge and then at a minimum frequency of once per six months, or more frequently if prescribed by the manufacturer of the monitoring device, or more frequently if required by this permit or any City of Stockton Environmental Control representative. Seasonal industries shall have the devices certified prior to the start of each season. All documentation relating to monitoring equipment calibration and certification shall be included in the self-monitoring report for the time period in which the work was performed. 4. Permittee shall calibrate all pH monitoring equipment using pH 4.0, 7.0 and 10.0 buffer solutions at a minimum frequency of once per day, or as directed by Environmental Control staff. Permittee shall perform calibration procedures as specified in the City of Stockton, Department of Municipal Utilities, Quality Assurance Manual for Self -Monitored Industries. The pH meter and recorder shall be calibrated to within 0.1 pH unit of each using 4.0, 7.0 and 10.0 buffer solutions. The permittee's representative performing the calibration shall record the date and time of calibration on the pH recording chart and shall initial the entry. 5. If continuous pH monitoring is required by this permit, and unless otherwise directed by Environmental Control staff, permittee shall ensure that the discharge of all flow to the sanitary sewer shall automatically and immediately cease upon the occurrence of a pH