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wells that have deteriorated. Not all prescribed methodologies will be appropriate for the <br /> various situations encountered at the NS area of operations. The methodologies may be <br /> modified to accommodate extraordinary conditions. New methods shall be approved prior to <br /> use in the field. <br /> B.15.2. Scope <br /> This procedure describes the standard practice for conducting routine inspections of <br /> groundwater monitoring wells. The procedure also provides criteria to use in determining if <br /> and when a monitoring well should receive corrective maintenance. Corrective maintenance <br /> activities are based on the results of the routine inspections. This procedure describes the <br /> standard practices for conducting well maintenance. Well maintenance includes correcting <br /> deficiencies in the surface components of the well and redeveloping the well. <br /> This procedure shall be applied only to groundwater remediation and monitoring wells. <br /> Because of the limitations associated with the redevelopment methods described in this <br /> procedure,the redevelopment section is not applicable to wells exceeding 6 inches in diameter. <br /> This procedure shall not be applied to multiport, single-string monitoring wells. <br /> Designated well maintenance personnel on all monitoring wells shall execute this procedure. <br /> At the discretion of NS and appropriate regulatory agencies, inactive monitoring wells may be <br /> excluded from redevelopment activities. At the discretion of NS, the procedure may be <br /> implemented in conjunction with routine groundwater sampling and data collection activities. <br /> In such a case, the inspection portion of the procedure shall be conducted before groundwater <br /> sampling and other data collection activities. All well maintenance activities shall be conducted <br /> after groundwater sampling activities to eliminate the potential for contaminating samples or <br /> altering the chemistry of groundwater samples. <br /> 13.15.3. Significance and Use <br /> Application of this practice will prevent most forms of degradation in monitoring wells. <br /> Application of this procedure will prevent the undetected contamination of monitoring wells by <br /> infiltrating surface water and ensure a long service life for monitoring well installations. <br /> This procedure shall be used to maintain an ongoing permanent record that documents the <br /> condition of groundwater monitoring wells, to identify when monitoring wells require <br /> maintenance, and to specify the procedures that shall be used to conduct monitoring well <br /> maintenance. If an issue is found with a well, it will be documented on the Field Data Sheet. If <br /> deemed necessary, a work order will be filled out and maintenance personnel will complete the <br /> task. <br /> This procedure shall not be applied to water-supply wells. Application of this procedure shall <br /> be limited to monitoring wells 6 inches in diameter or less. <br /> Daub &Associates, Inc. Page B-34 Natural Soda LLC 2022 SAP <br />