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<br />MONITORING SYSTEM <br /> <br />TYPES OF MONITORING <br /> <br />Four types of monitoring will be used in <br />program: scheduled, unscheduled, demand, and <br />monitoring. <br /> <br />I. <br /> <br />the pretreatment <br />industrial self- <br /> <br />Scheduled Monitoring <br /> <br />Scheduled monitoring involves the systematic sampling <br />comprehensive inspection of significant industrial contributors to <br />wastewater system in accordance with a predetermined schedule. <br />determining a monitoring schedule, the following considerations <br />be used: <br /> <br />II. <br /> <br />and <br />the <br />In <br />will <br /> <br />* <br /> <br />A monitoring visit should be scheduled at least once per <br />year for each significant industrial unit (IU), or more so <br />if resources allow. <br /> <br />* <br /> <br />Provisions should be made with the IU for on-site inspection <br />of plant operations to ensure that pretreatment facilities <br />are being operated properly and that no intentional dilution <br />of wastewater is occurring. <br /> <br />* <br /> <br />Composite samples will be collected and flow <br />measurements performed during the sampling period. <br /> <br />rate <br /> <br />Unscheduled Monitoring <br /> <br />Unscheduled monitoring will be used to randomly spot check all <br />sources within the collection system and is a requirement of the <br />Federal pretreatment regulations. Unannounced visits and sampling <br />will be used to verify compliance. Essential elements of unscheduled <br />monitoring include but are not limited to: <br /> <br />* <br /> <br />Monitoring performed on a unannounced <br />industry at normal operations, <br /> <br />basis, <br /> <br />with <br /> <br />the <br /> <br />* <br /> <br />One unscheduled monitoring event each year, at a minimum for <br />each significant IU, <br /> <br />* <br /> <br />Use of grab samples and flow measurements, when possible, <br /> <br />* <br /> <br />Inspection of plant operations and pretreatment <br />(optional). <br /> <br />activities <br /> <br />III. Demand Monitoring or Investigation Monitoring <br /> <br />Demand monitoring is conducted in response to a known or <br />suspected violation discovered in a self-monitoring report, routine <br />sampling session, or by public complaint. Additionally, any discharge <br />of prohibited materials can prompt demand monitoring. Demand <br /> <br />-68- <br />