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hole drilled just below the riser cap. This hole allows air pressure in the well to equilibrate <br /> with atmospheric pressure as water levels or the atmospheric pressure fluctuates. This <br /> weep hole should not be closed. If the well is a flush-mount installation and the riser has a <br /> weep hole, note this fact in the inspection documentation. Weep holes are generally not <br /> recommended for flush-mount wells as they permit liquids to enter the well if the flush- <br /> mount vault becomes flooded. Weep holes in the risers of flush-mount wells are <br /> permissible if the vault of the flush-mount installation has been installed to permit drainage <br /> from the vault or the vault has a watertight cover. <br /> • Check for the presence of guard posts. If present, note whether guard posts are adequately <br /> painted for high visibility. If guard posts are not present, note this on the Well Maintenance <br /> Checklist. <br /> • Check for the presence of a concrete surface pad surrounding the security casing. If the <br /> concrete surface pad is absent or damaged, note this information on the Well Maintenance <br /> Checklist. <br /> • Check the well number or well identification to determine if it is clearly marked and in <br /> agreement with the well location map. <br /> B.15.5. Maintenance Criteria and Corrective Action Protection <br /> This section describes criteria used to evaluate the conformance or nonconformance aspects of <br /> each component of the well inspection. For each nonconformance criteria, a corrective action <br /> is described. Whenever possible, corrective action should be implemented during the same <br /> field trip during which a nonconformance aspect was identified. Any corrective action taken <br /> should be noted on the maintenance work orders. <br /> • If the lid on the security casing is missing or damaged to the point of permitting access to <br /> the well, arrange a temporary cover, if possible, and make arrangements to have a new lid <br /> fixed to the security casing (commonly by welding). <br /> • If the lock on the steel security casing is missing, it should be replaced. If all monitoring-well <br /> locks currently in use at a site are keyed identically, a similarly keyed lock should be used to <br /> replace a missing one. However, if a lock of the same key type as other security casing locks <br /> is not immediately available; any strong lock should be installed for temporary well <br /> protection. In such a case, note the need for a new lock on the field data sheet. If a lock <br /> has become difficult to operate because of exposure, a lubricant should be added to the <br /> tumbler assembly. Do not over lubricate, as these actions will give rise to contamination of <br /> the well or sampling equipment that will be used at the well in the future. <br /> • If the entire steel security casing is missing, make arrangements to replace it. The bottom <br /> of the security casing should be set 3 feet below the ground surface in concrete. The <br /> concrete should extend to the surface and be sloped away from the well. Repairs should be <br /> made if the security casing is in place but is damaged and allows liquids to drain into the <br /> annular space around the well casing or is preventing proper access to the well. If repairs <br /> cannot be made,the need for these should be noted on the checklist. <br /> Daub &Associates, Inc. Page B-36 Natural Soda LLC 2022 SAP <br />