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MEMO <br /> IIIDistrict Board,Leadville Sanitation District <br /> ,-��a-'.`. //� Union Milling-Permit M1990-057 <br /> `��e �"' Job No.:1119.2e <br /> March 18,2024 <br /> C O N S U L i l Id,, '41'/k, S <br /> Page 4 of 4 <br /> TABLE 4-30: MILL.TAILINGS TCLP RESULTS <br /> EPA Hazardous Standard ALS Test %of <br /> Waste No. Constituent (mg/I) Result(mg/I) Standard <br /> 0004 Arsenic 5.000 0.045 0.90% <br /> D005 Barium 100.0 0.182 0.18% <br /> D006 Cadmium 1.000 0.008 0.80% <br /> D007 Chromium 5.000 0.020 0.40% <br /> D008 Lead 5.000 0.037 0.74% <br /> D009 Mercury 0.200 0.00975 4.88% <br /> D010 Selenium 1.000 0.050 5.00% <br /> D011 Silver 5.000 0.010 0.20% <br /> TABLE 4-31: RCRA TCLP METAL RESULTS <br /> Hazardous Final Residue TCLP Limit %Reporting to <br /> Constituent Solids Seepage (ppm) Final Seepage <br /> (ppm) (ppm) Residue <br /> Barium 520 0.182 100.00 0.04% <br /> Lead 1,500 0.037 5.00 0.00% <br /> Silver 13 0.010 5.00 0.08% <br /> Arsenic 340 0.045 5.00 0.01% <br /> Cadmium 1.6 0.008 1.00 0.50% <br /> Chromium 14 0.020 5.00 0.14% <br /> Selenium 1 0.050 1.00 5.00% <br /> Mercury 5.2 0.00975 0.20 0.19% <br /> Lastly,the Mill is proposing to use a lift station for the sanitary sewer.The lift station will be privately owned, <br /> operated and maintained by the Milll. Lastly,another concern is low level metals leaving the facility from employees <br /> washing their hands as this wastewater would enter the District's sanitary sewer collection system and ultimately end <br /> up at the District's WWTF influent. <br /> This summarizes our review of the Mill permit and objections based on our understanding of the proposed Mill and <br /> operations. <br /> `� <br /> Signed: cithia 7�/KCopies to: <br /> Chelsea Fagan Danielle DiMauro- Welborn Sullivan Meck & Tooley, <br /> Senior Project Engineer P.C. <br /> Joseph Fattor-District Attorney <br />