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12 <br /> • The treatment system operation and maintenance (O&M) procedures will consist of the <br /> following Upon successful system start-up a BCC technician trained in O&M of remediation <br /> systems will visit the site weekly The technician will record flow rates and pressure readings, <br /> test the backup system (sump and high level float switch) check the system for leaks and adjust <br /> pumping rates (if needed) Any items noted that affect the system operation will be immediately <br /> repaired by the technician If any such items cannot be immediately repaired, the system will <br /> be temporarily shut down until satisfactorily repaired The technician will sample the treatment <br /> system inlet, between the GAC units, and the system effluent at a schedule agreed to by the City <br /> and the Regional Board Typically, samples are collected approximately weekly for a month, <br /> then monthly following that period, unless the first month's sampling indicated a need for <br /> additional weekly sampling The samples will be analyzed for TPH and BETX using U S <br /> Environmental Protection Agency (EPA) method 8015m/5030/8020 <br /> Process controls include a high level switch in the sump containment area that automatically <br /> shuts down the entire system in case of a system leak The system must be re-started manually <br /> Each pumping well is equipped with level controllers that automatically start and stop the pumps <br /> based on water levels <br /> Implementation <br /> Construction of the remediation system is anticipated to begin within 90 days of approval <br /> of this final remediation plan and upon issuance of the necessary permits The plumbing, <br /> electrical, and general infrastructure required for groundwater extraction will be installed at the <br /> same time as the vapor extraction and sparge system However, the granulated carbon vessels <br /> and groundwater pumps will not be installed until needed. <br /> i <br /> 7403\REPORTSIREMEDATN PLN <br />