2021-07-01_PERMIT FILE - M2021007

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V� Knight Piesold C O N S U LT I N G Table 1 EPA Regional Screening Level Standards Compared to TCLP, SPLP,and Whole Rock Analysis Results EPA SGLLC SGLLC E-1 Regional Average SGLLC W- SGLLC C- SGLLC E- W-1 SGLLC C-1 Whole Analyte Screening TCLP 1 SPLP 1 SPLP 1 SPLP Whole Whole Rock Rock Level (mg/kg) (mg/kg) (mg/kg) (mg/kg) Rock Analysis Analysis (mg/kg) An I ksis (mg/kg) (mg/kg) Aluminum 1,100,000 ND 0.13 0.41 0.04 6.83%* 6.30%* 6.94%* Antimony 470 <0.10 0.00008 0.00007 0.00002 5.1 2.7 2.8 metallic Arsenic, 3 <0.10 0.0003 0.0002 0.0001 28.6 23.4 32.8 Inorganic Barium 220,000 0.2 0.072 0.046 0.001 863 391 676 Cadmium(Diet) 980 <0.10 0.002 0.003 0.003 0.67 0.22 0.49 Chromium(III) 1,800,000 ND ND ND ND ND ND ND Chromium,Total <0.10 <0.00010 <0.00010 <0.00010 156 193 161 Copper 47,000 0.2 0.10 0.08 0.03 78 53 145 Fluoride 47,000 ND ND ND ND ND ND ND Iron 820,000 0.9 0.6 1.3 0.2 3.22%* 2.91%* 4.05%* -Lead and 800 1.2 0.02 0.06 0.05 380 177 479 Compounds Lithium 2,300 ND 0.003 0.005 0.005 8.9 13.1 17.1 Manganese 26,000 ND 0.60 1.86 1.43 219 232 388 Non-diet -Mercury 46 <0.0020 ND ND ND ND ND ND elemental Molybdenum 5,800 <0.10 <0.000050 <0.000050 <0.000050 2.46 1.13 1.01 Selenium 5,800 <0.10 <0.000040 0.000045 <0.000040 <0.3 <0.3 <0.3 Silver 5,800 <0.010 0.00003 0.00002 0.00001 9 2 4 Thallium 12 <0.10 0.00005 0.00006 0.00004 1.8 1.7 1.7 Soluble Salts Tin 700,000 ND <0.00020 <0.00020 <0.00020 2.6 3.1 4.5 Tungsten 930 ND <0.000010 <0.000010 <0.000010 13.6 17.8 8.2 Uranium 230 <0.10 0.0001 0.0003 0.00008 3.2 2.0 3.5 Vanadium and 5,800 <0.10 <0.00020 <0.00020 <0.00020 77 62 80 Compounds Zinc and 350,000 0.3 0.2 0.3 0.3 201 124 190 Compounds NOTES: 1. ND-No data available for these parameters. 2. *These constituents are in units total percent of whole rock analysis. 3. Values in red text indicate the value exceeds the EPA RSL. June 29,2021 DV-21-0775 4 of 5