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CITY OF STOCKTON <br /> PRETREATMENT INDUSTRIAL USERS <br /> GENERAL PERMIT CONDITIONS <br /> (Revised April 2017) <br /> 1. Permittee shall not allow any materials or any liquid waste to be discharged into the City <br /> of Stockton sewer system which could be harmful to the system or create a hazard or <br /> nuisance, as defined in sections 13.08.100 through 13.08.290 of the Stockton Municipal <br /> Code (SMC). If the permittee is found to be responsible for damage to the City of Stockton <br /> stormwater or sanitary sewer system, or for the excessive deposits of objectionable <br /> Atmials in said systems, permittee may be required to bear the cost to the City for <br /> ng, or shall restore the affected part of the system to proper working condition. A <br /> violation of any provision of these permit conditions, local codes, slate codes, federal <br /> codes or Federal Pretreatment Regulations may result in civil and/or criminal actions and <br /> fines of up to$25,000 per calendar day for each violation. <br /> 2. Permittee shall not allow any pollutants, including oxygen demanding pollutants (BOD, <br /> TSS, etc.)to be released at a flow rate and/or pollutant concentration which the permittee <br /> knows, or has reason to know, will cause interference to the Publicly Owned Treatment <br /> Works (POTW). in no rase, shall a sudden, unexpected discharge have a flow rate or <br /> contain concentrations of qualities of pollutants that exceed forany time period longer than <br /> 15 minutes more than five times the average 24-hour concentration, quantities, or flow <br /> { 1 during normal operation (SMC 13.08.100). <br /> 3. Permittee shall insure that all pretreatment facilities, including but not limited to flow, pH <br /> temperature and lower explosive limit (LEL) measuring, recording and sampling <br /> equipment, are operational and maintained in proper working order at all times; and that <br /> flow, pH, temperature and LEL measuring and recording devices are certified for accuracy <br /> by an approved qualified licensed technician prior to the initial discharge and then at a <br /> minimum frequency of once per six months, or more frequently if prescribed by the <br /> manufacturer of the monitoring device, or more frequently if required by this permit or any <br /> City of Stockton Environmental Control representative. Seasonal industries shall have the <br /> devices certified prior to the start of each season.All documentation relating to monitoring <br /> equipment calibration and certification shall be included in the self-monitoring report for <br /> the time period in which the work was performed. <br /> 4. Permittee shall calibrate all pH monitoring equipment using pH 4.0, 7.0 and 10.0 buffer <br /> solutions at a minimum frequency of once per day,or as directed by Environmental Control <br /> staff. Permittee shall perform calibration procedures as specified in the City of Stockton, <br /> Department of Municipal Utilities, Quality Assurance Manual for Self-Monitored Industries. <br /> The pH meter and recorder shall be calibrated to within 0.1 pH unit of each using 4.0, 7.0 <br /> and 10.0 buffer solutions. The permittee's representative performing the calibration shall <br /> record the date and time of calibration on the pH recording chart and shall initial the entry. <br /> 5. If continuous pH monitoring is required by this permit, and unless otherwise directed by <br /> Environmental Control staff, permittee shall ensure that the discharge of all flow to the <br /> sanitary sewer shall automatically and immediately cease upon the occurrence of a pH <br />