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<br />. <br /> <br />concentrations at or below levels presently found in the lower main stem, " <br /> <br />U) <br />00 <br />...... <br />W <br /> <br />(2) that the implementation of this policy should not interfere with the <br /> <br />. <br /> <br />perogative and right of the Upper Basin.to develop its compact-apportioned <br /> <br />waters, (3) that programs to implement this policy should be developed <br /> <br />. <br /> <br />on a basin-wide basis, (4) that the program described in Interior 's <br /> <br />February, 1972 report, "Colorado River Water Quality Improvement <br /> <br />Program, II should be implemented under the direction of the Bureau of <br /> <br />. <br /> <br />Reclamation with assistance from the Environmental Protection Agency, <br /> <br />and (5) that "the adoption of numerical criteria for salinity be deferred <br /> <br />. <br /> <br />until the potential effectiveness of Colorado River salinity control measures <br /> <br />is better known. II These conclusions and recommendations were approved <br /> <br />in June, 1972 by the Administrator of the Environmental Protection <br /> <br />. <br /> <br />Agency. <br /> <br />The Colorado River Basin Salinity <br />Control Act (PL 93-320) <br /> <br />. <br /> <br />All of the foregoing events preceded and led up to passage of the <br /> <br />1974 Colorado River Basin Salinity Control Act (PL 93-320), the most <br /> <br />recent addition to the "Law of the River. II Title I of this act authorizes <br /> <br />. <br /> <br />implementation of the Brownell-negotiated Minute 242, which requires <br /> <br />that salinity at the border shall be within 115 ppm (give or take 30 ppm) <br /> <br />. <br /> <br />of the quality of Imperial Dam. Accordingly, Title I calls for a large <br /> <br />desalting complex to treat drainage waters from the Welton-Mohawk <br /> <br />Irrigation Project, provisions to assure that drainage outflow from the <br /> <br />. <br /> <br />22 <br /> <br />. <br />