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White Slough Water PollutionlOntrol Plant -6- 21 March 2000 Inspection Report 2. The Discharger should provide a fail-safe system to prevent excursions. One method could be staffing 24-hours per day. If the Discharger chooses to not staff the plant, 24-hours per day, then adequate measures must be taken to minimize the risk associated with excursions such as adequate alarms. The Discharger should install and operate a high and low alarm system for the chlorination and dechlorination units. An explanation on how the alarm and call-out system work should be provided. 3. Discharger should update and train operators of"warning signs" that a system unit process may be in distress. There is no reason that the swing shift operator-who made the last rounds of the chlorination system should not have recognized the anomalies on the dose and residual analyzer charts. These anomalies became discernable as early as 2100 hours on 3 January 2000. 4. In order to comply with Standard Provision and Reporting Requirement, General Provision A.6. The Discharger should update standard operating procedures (SOPs) for the facility. The when and how treatment processes will be operated and updated SOP needs to specify P P maintained. >. Pursuant to Standard Provision and Reporting Requirement, General Reporting Requirement B.3., the Discharger shall be required to submit to the Board a technical report on its preventive (failsafe) and contingency (cleanup) plans for controlling accidental discharges, and for minimizing the effects of such events. This report shall include all treatment processes in use at the facility. The following attachments complete this Inspection Report: Attachment 1 Chart from "Dose" Chlorine Analyzer Attachment 2 Chart from "Residual" Chlorine Analyzer Attachment 3 Discharger's Chlorine Contingency Procedure Approved: '