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<br />Table 11 <br /> <br />Numeric Standards for Protection of a Water Source <br />for Agricultural Uses (Source: Draft Copy of <br />"The Basic Standards for Ground Water" <br />April, 1986 - Colorado Department of Health, <br />Water Quality Control Commission) <br /> <br /> <br />Parameter) Maximum Level <br />Al 5.0 mg/i <br />As 100 ug/1 <br />Be 100 ug/1 <br />B 75D ug/1 <br />Cd 10 ug/1 <br />Cr 100 ug/1 <br />Co 100 ug/1 <br />Cu 0.2 mg/1 <br />F 2.0 mg/1 <br />Fe 5.0 mg/1 <br />Pb 100 ug/1 <br />Li 2.5 mg/1 <br />Mn 0.2' mg/1 <br />Hg 10 ug/1 <br />Mo 10 ug/1 <br />Ni 200 ug/1 <br />N02-N 10 mg/1 as N <br />N02+N03-N 100 mg/1 as N <br />5e 20 ug/1 <br />V 100 ug/1 <br />Zn 2.0 mg/1 <br />pH 6.5 - 8.5 <br />SAR 10 unitless <br />RSC 1.5 meq/1 <br />)All concentrations are dissolved. The sample water shall be filtered <br />through a 0.45 micron membrane filter prior to preservation. The total <br />concentration (not filtered) may be required on a case-by-case basis if <br />deemed necessary to characterize the pollution caused by the activity. <br />37 <br />