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<br /> <br />Sompling river quolity <br /> <br />Modem equfpmentisused ot <br />thel6boratonr An atomic <br />abs<:)l'ptioQspectrophotometer <br />is usedtd detect the presence <br />of metals.SDQ'! as mercury. <br />leod.1ronand silver. This <br />instrui'l)ent.IJ.Jhich uses 0 gas <br />flame td atomize a water sam- <br />ple, is capobie. of measuring <br />minlit$ quontities of more than <br />25 different elements. Dis- <br />saived traces of these metols <br />are h?qlientlt,lfound in rivers <br />andleservOjr5. The ability to <br />ideqtiWthesemetals is of <br />grOlliing importance as man- <br />mode poll uti an increases <br />IV\odern \3quipment such as the <br />ga$'cnroi'l)otogroph and the <br />i'l)assspe<:trophot6meter. are <br /> <br />- ........ <br /> <br />the latest instruments used in <br />the onolysis of organic <br />compounds. <br /> <br />Water Reuse Demonstra- <br />tion Plant <br />Looking to the future. Denver <br />has constructed a Potable <br />Water Reuse Demonstration <br />Plant as part of a $30 million, 7 <br />year project to demonstrate <br />that high quality water. "equai <br />to or better than Denver's cur- <br />rent drinking water". can be <br />produced safely and reliably <br />from treated sewoge effluent. <br />Water treated by this facility <br />will undergo extensive testing <br />for more than 200 poteqtially <br />contaminating substances. <br />Included in this testing progrom <br />will be an exhaustive progrom <br /> <br />\, <br /> <br />',~,:/\", ,,,",,,; ''';,~ "",,1 <br />Autoonalyzeifoi- gas chromotography <br /> <br />of health effects testing utiliz, <br />ing generationsoflbborotory <br />animals. None of the relJse <br />water produced from this de(fl; <br />onstration plant will be added <br />ta drinking water supplies until <br />and unless.it is proven COnelu" <br />sively thot it is safe for human <br />consumptiOn: Meanwhile,Jtw~1 <br />be allocated. for use at the <br />MetropolitarJ Denver Sewpge <br />Disposal District and for other <br />industrial or 10ndscoplqg <br />purpases. <br /> <br />When the absolute d~pendiJ.. <br />bility of the reusefacillty.is <br />established a full-s<:oleplant <br />could be constructedtoprp' <br />duce up to 100 millian gdlloi)? <br />per day (mgd) or approXi- <br />mately IS perceni.afDenver's <br />potable water needsbq th? <br />veor 2000. <br />