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Table 11 <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 /> Parameterl Maximum Level <br /> Al 5.0 mg/l <br /> As 100 ug/l <br /> Be 100 ug/l <br /> 6 750 ug/l <br /> Cd 10 ug/l <br /> Cr 100 ug/l <br /> Co 100 ug/l <br /> Cu 0.2 mg/1 <br /> F 2.0 mg/l <br /> Fe 5.0 mg/l <br /> Pb 100 ug/l <br /> Li 2.5 mg/l <br /> Mn 0.2 mg/1 <br /> Hg 10 ug/l <br /> Mo 10 ug/l <br /> Ni 200 ug/l <br /> NO2-N 10 mg/l as N <br /> NO2+NO3-N 100 mg/l as N <br /> Se 20 ug/l <br /> V 100 ug/1 <br /> Zn 2.0 mg/l <br /> pH 6.5 - 8.5 <br /> SAR 10 unitless <br /> RSC 1.5 meq/1 <br /> lAll 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 />