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<br />BROWN ANDCALDWELJ C~~ <br />CONSULTING ENGINEERS <br /> <br />"I!CEIVED <br /> <br />,-'! LL '89 <br />COL.VMI\LJV ~AtEA <br />oONSERVA1ION <br />BOARD <br /> <br />February 23, 1989 <br /> <br />Mr. Keith Eberhardt <br />Colorado Water Conservation Board <br />State Centennial Building <br />1313 Sherman Street, Room 721 <br />Denver, CO 80203 <br /> <br />Dear Mr. Eberhardt: <br /> <br />21/35 <br /> <br />Water providers face new challenges in a changing regulatory environment. One example <br />is the new regulations for controlling lead and copper in drinking water proposed by the <br />U.S. Environmental Protection Agency last August. <br /> <br />When enacted, these new regulations will have a direct effect on most water utilities. Why? <br />Because lead and copper primarily occur as corrosion by-products from household piping <br />and plumbing fixtures. Therefore, EPA has proposed a corrosion control treatment <br />standard along with numerical standards "at the tap." <br /> <br />As a result, water conditioning may be necessary to stabilize your water, control corrosion, <br />and thereby limit the lead and copper concentrations at the tap. The enclosed <br />compendium. entitled Water Stability. Corrosion. and Lead Control, reviews factors <br />affecting lead and copper including an overview of corrosion control and calcium carbonate <br />stability. <br /> <br />We trust you will find this information helpful. Within the next few weeks, one of our staff <br />will call to discuss the effect new regulations may have on your operations and answer any <br />questions you may have. <br /> <br />Very truly yours, <br /> <br />BROWN AND CALDWELL <br /> <br />2J () WM-- <br /> <br />Ed Duerr <br />Engineering Manager <br /> <br />EJD:hs <br />Enclosures <br /> <br />SUITE 403 7535 EAST HAMPDEN AVENUE DENVER, COLORADO 60231-4838. (303) 750-3983 FAX: (303)750-1912 <br />