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Appendix B <br /> Inspection and Maintenance Plan <br /> City of Lathrop Consolidated Treatment Facility <br /> 1. General Information <br /> The City of Lathrop's Consolidated Treatment Facility(CTF) treats and disposes domestic <br /> wastewater generated within the City of Lathrop. On February 5, 2015,the Regional Water Quality <br /> Control Board approved a new Waste Discharge Requirements (WDRs) and Monitoring and <br /> Reporting Plan (MRP) (Order No. R5-2015-2006).This Inspection and Maintenance Plan responds <br /> to the Order's requirement to ensure all monitoring wells are maintained in good condition for <br /> current and future use. <br /> 1.1. Purpose <br /> This Inspection and Maintenance Plan outlines the steps to protect and maintain the integrity of the <br /> City of Lathrop's monitoring well network associated with the Consolidated Treatment Facility. <br /> Annually,the monitoring wells should be visited and inspected for any damage to the protective <br /> features around the monitoring well or to the well itself. <br /> 2. Visual Inspections <br /> Monitoring wells should be visited at least once a year,as access allows.The well's physical <br /> condition should be documented and recorded by evaluating the well casing,monument,bollards <br /> (when applicable),and concrete pad conditions.A well inspection checklist(Appendix B1) should <br /> be filled out and kept on file,including a photograph of each well site that documents contemporary <br /> conditions (photographs are not needed when visible site conditions have not changed from the <br /> existing photograph on file).Wells that are actively sampled as part of the monitoring well network <br /> should have this information documented during the annual sampling event by the sampling crew. <br /> 3. Well Maintenance <br /> Based on the annual inspections or other field sampling notations,monitoring well maintenance <br /> should be performed as needed.Well maintenance tasks include the following,as necessary: <br /> • Inspecting and cleaning the well,vault box,and surrounding area <br /> • Replacing or fixing protective and security measures.These can include,but are not limited <br /> to the following: <br /> o Replacing locks <br /> o Replacing well plugs <br /> o Replacing stripped vault bolts,re-tapping vault thread holes, or complete <br /> replacement of the vault if holes are non-repairable <br />