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2014 Groundwater <br /> ARCADIS Monitoring Report <br /> Florence, Colorado <br /> groundwater monitoring wells that were no longer active. Details of the field activities <br /> performed as part of the groundwater monitoring well installation and abandonments <br /> were documented in the Final April 2009 Groundwater Monitoring Report (ARCADIS, <br /> 2009). <br /> Following installation in April 2009, MW-13 was sampled on a quarterly basis for five <br /> consecutive quarters at the request of the DRMS for the purpose of determining the <br /> appropriate parameters and setting compliance standards for the well. Analytical <br /> results were provided in the March 2010 Groundwater Monitoring Report (ARCADIS, <br /> 2010). Subsequently, MW-13 was added to the annual groundwater monitoring <br /> program in March 2011. <br /> 1.3.4 July 7,2010 Groundwater Monitoring Plan <br /> On July 7, 2010 Holcim proposed another revision to the GMP, including proposed <br /> compliance standards for MW-13. This GMP revision can be found in Appendix B. <br /> The DRMS responded with numeric protection levels (NPLs) [previously referred to as <br /> compliance standards] for MW-13 in a letter dated November 27, 2012. This letter has <br /> been included in Appendix A. The DRMS approval letter stipulated that in addition to <br /> MW-7, if the analytical parameters exceeded their respective NPL by more than 10%, <br /> semi-annual sampling for those parameters would commence. <br /> 5 <br />