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IV. Sampling Schedule <br /> A. Winter Sample Schedule <br /> During the winter/spring months, all three groundwater monitoring wells and the sump well will be <br /> sampled on a monthly basis as long as safe access is possible. If site conditions at any of the <br /> groundwater monitoring wells prevent safe access, sampling of that well will not be conducted at that <br /> time and either re-scheduled or postponed until the following month. <br /> To access the sample locations during the winter months, sampling personnel may utilize some of, but <br /> are not limited to, the following equipment, in additional to their regular required PPE,to ensure safe <br /> sampling procedures are being followed: <br /> • Snowshoes <br /> • Avalanche location beacon <br /> • Microspike footwear traction <br /> • Ladder/Tether <br /> If snowpack volumes accumulate to the point where the monitoring wells are inaccessible,notice will <br /> be provided to the DRMS and sampling will cease until access can be re-evaluated and deemed safe <br /> for personnel to resume sampling activities. <br /> B. Summer Sampling Schedule <br /> During the summer and early fall months, or when normal access is feasible, samples from the <br /> groundwater monitoring wells will occur on a monthly basis at all three (3) monitoring wells and the <br /> sump well. <br /> It may be necessary to conduct bi-monthly (2x per month) sampling of individual monitoring wells if <br /> significant changes to groundwater quality conditions are observed between sampling events, large <br /> fluctuations in water levels due to seasonal runoff, or changes to the treatment/remediation plans. <br /> Equipment used to access the sample locations may consist of, but is not limited to,the following: <br /> • Waterproof/resistant clothing& PPE <br /> • Microspike footwear traction <br /> • Ladder/Tether <br /> C. Compromised/Dania eg d/Dry Wells <br /> Should the integrity of a well be compromised by subsurface movement or other damage that prevents <br /> sampling from occurring, the well will either be plugged and abandoned in accordance with Colorado <br /> Division of Water Resources (CDWR) (also known as the Office of the State Engineer or the State <br /> Engineer's Office) requirements and a new one installed,or the monitoring of the groundwater in that <br /> area will be re-evaluated. <br /> 3 <br />