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M M M M i <br /> TABLE 4 <br /> SGLP Analytical Results <br /> Varra Coal Ash Project <br /> Weld County, Colorado <br /> CGRS No. 1-135-2755 <br /> Sample Other Analydcal Results m /L <br /> Total Cyanide Free Cyanide Chloride Fluoride Sulfate Nitrate Nitrite <br /> Class F Silo Ash With Gypsum (C Silo) ND NA 150 45 2700 4.1 4.63 <br /> Bottom Ash ND NA 110 0.9 3000 1.9 ND <br /> Cherokee Silo Ash 213 ND NA 83 5.3 3400 0.083 ND • <br /> Cherokee 4 Fly Ash with Sodium ND NA 84 44 3300 0.86 ND <br /> Recycled Concrete ND NA 110 0.19 2500 1.3 0.12 <br /> Recycled Asphalt ND NA 97 0.95 2800 1 ND <br /> Gravel Quarry Water ND NA 78 40 2900 1 ND <br /> State Water Quality Standards 0.2 250 2.0 250 10 1 <br /> P S A P P P <br /> Note: <br /> NA-Not Analyzed <br /> ND-Not Detected <br /> A-Agricultural Standard <br /> P-Primary Drinking Water Standard <br /> S-Secondary Drinking Water Standard <br /> • <br /> Page 2 of 2 <br />