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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />~:~??~ <br /> <br />. <br /> <br />similar to those imposed for basin-wide discharges into Cherry Creek and Chatfield <br />Reservoirs. <br /> <br />Imposition of phosphorous and total nitrogen standards would severely limit any exchange <br />into the Barr system absent enormously costly advanced wastewater treatment. Comparison <br />of recommended standards for unrestricted irrigation uses with present discharge standards <br />imposed on Metro reveals the following (asterisk indicates that no discharge limit is imposed): <br /> <br />Constituent Recommended Standard Metro Limit <br />fecal coniform 2.21100 ml (total col.) 2, 10011 00 ml <br /> max. 23/100 ml 4,200/100 ml <br />VIruS o pfu * <br />protozoa, cysts 0 * <br />nitrogen < 10 mgfl (30 max) * <br />total dissolved solids > 320 < 480 mgfl * <br />total suspended solids 10mgfl 45 mgfl <br />biochemical oxygen 10 mgfl 30 mgfl <br />demand <br /> <br />There are no trace element standards imposed on Metro's discharge to the Burlington-O'Brian <br />Canal. The trace element discharge standards imposed on Metro's discharge to the Platte, <br />however, suggests that Metro's trace element discharge into the Burlington-O'Brian Canal is <br />within recommended limits. <br /> <br />Notwithstanding that municipal exchanges have become a cornerstone of present and future <br /> <br />17 <br />