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DRMS notes that Table 3B of the 2019 Annual Hydrology Report(AHR),the groundwater analyte suite <br /> does not match Ex 29 Table 8. Table 3B lists hydroxide and omits hardness.Hydroxide monitoring and <br /> reporting were removed as part of TR94-23 as indicated on page Ex 29-4a. <br /> 21. Please resolve this discrepancy in Table 3B of the permit with revised pages, and assure <br /> correspondence with future AHRs. Also,please update Exhibit 29 as necessary. <br /> At groundwater well No. 5 only water levels are collected. The well has not been sampled since July <br /> 2013,although Exhibit 29,Table 1 (page 29-6),of the permit indicates annual sampling. Also,well 913F <br /> listed on Ex 29 Table 1 (page 29-6),was not monitored as per the AHR. According to Note 5 of AHR <br /> Table 1,the well is required to be sampled on a quarterly basis if the No. 9 Mine waste rock backfill area <br /> has undergone final grading. <br /> 22. Please provide the missing data for groundwater well no. 5 as outlined in the permit monitoring <br /> requirements. <br /> 23. Please provide the missing data for well 913F as outlined in the permit monitoring requirements. <br /> Excursions occurred in the following wells: <br /> o Well 81-01 manganese and iron concentrations were above the baseline water quality levels for <br /> this well and also above the basic standards of groundwater.Magnesium concentrations were the <br /> highest ever recorded at this location. <br /> o The No. 9 Mine Well had the highest concentration of sulfate and was above the basic standards <br /> of groundwater.Magnesium, sodium,chloride,boron,and calcium concentrations were the <br /> highest recorded. <br /> 24. Please provide an analysis of the excursions in Well 81-01 and The No. 9 Mine Well. <br /> Rule 4.05.13(2): Surface Water Monitoring <br /> The information required by these rules is discussed in section 4.0 of the permit document and Exhibit 29, <br /> the Water Quality Monitoring Manual. <br /> Adequacy issues noted comprise item 15 in Rule,Rule 2.05.6(3),above and several discrepancies <br /> between tables in Exhibit 29, and monitoring requirements as pointed out in Rule 4.05.13 above. <br /> Rule 4.05.18: Stream Buffer Zones <br /> The information required by these rules is discussed on page 4.01-6, Section 4,of the permit document. <br /> DRMS notes that upon field inspections the stream buffer zone appears adequately marked. <br /> No adequacy issues noted. <br /> Rule 4.10: Coal Mine Waste Banks <br /> The information required by these rules is discussed on page 4.01-8, Section 4, and in section 2.05,page <br /> 2.05-29 of the permit document. DRMS notes that the waste bank is undergoing reclamation. <br /> No adequacy issues noted. <br /> Rule 4.05.8(1) -(3):Acid and Toxic-Forming Materials <br /> The information required by these rules is discussed on page 4.01-5, Sections 2.05.4,2.04.6 and 2.04.7 <br /> and Exhibit 22. <br /> 25. Based on the Division's files the last refuse pile inspection report was submitted for the fourth <br /> quarter of 2017. In accordance with Rule 4.10.2(2)inspection of coal mine waste banks shall be <br /> performed in accordance with Rule 4.09.1(11)and other requirements listed in Rule 4.10.2(2). <br /> Williams Fork Mines C1981044 -10- 2 March 2021 <br /> Mid Term Review 8 <br />