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• <br />Table 3 (continued) <br />Comparison of Water Quality Standards with Analyses from Rollins Sandstone Monitoring Sites <br />(All results mg/L unless stated otherwise, and al! metals are dissolved) <br /> CDMG Material Balance Standards CDPHE Rollins Sandstone Monitoring Sites <br /> Domestic, Ground Water <br /> Irri anon A riculture Class I Standards RSS N-Decline RSN UTL <br />Calcium 10 9 9 7 <br />Magnesium 3 Gl <1 1 <br />Potassium 62 4.8 6.2 7.2 <br />Sodium 306 526 768 765 <br />Sodium Absorption Ratio 21.8 47.2 68.9 76.9 <br />Aluminum 5 ®pH <5 5° 0.023 <0.001 0.007 0.020 <br />Arsenic 0.1 0.1 0.05 0.05`, 0.1° O.Ol2 0.025 <0.001 0.004 <br />Antimony 0.004 0.002 <0.001 0.002 <br />Barium 1 1 0.13 0.64 1.31 0.72 <br />Beryllium O.l O.l° <O.OOI <0.001 <0.001 0.0018 <br />Boron 0.5/2.0 0.75° 0.075 0.410 0.337 0.692 <br />Cadmium O.OI 0.01 0.01 0.01`, 0.01° 0.0012 0.0006 <0.0002 0.0007 <br />Chromium 0.1 0.05 0.05`, 0.1° <0.(!Ol 60.001 0.001 60.001 <br />Cobalt 0.05° 0.001 O.OOI 0.002 0.003 <br />Copper 0.2 0.2 1.0 1`, 0.2° 0.006 0.005 60.001 0.003 <br />Iron 5.0 0.3 0.3`, 5° 1.68 0.74 0.2 0.15 <br />Lead 5 0.1 0.05 0.05`, 0.1° <0.001 0.004 <0.001 0.003 <br />12 <br />