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<br />c.o <br />~ <br />c.o <br />.-j <br /> <br />---- -, <br /> <br />ENVIRONMENTAL PROTECTION AGENCY <br /> <br />concentrations should not exceed 100 micro-grams per liter (ug/l) at any <br />point within a flowing stream, nor should 50 ug/l be exceeded where waters <br />enter a lake, reservoir, or other standing water body. The mean concen- <br />tration of phosphorus in the Gunnison River west of Gunnison, Colorado <br />approximates 150 ug/l. Concentrations sometime reach a maxinru.m of <br />500 ug/l. These high concentrations in addition to the Town of Gunnison <br />contributing an increasing load as its population increases may warrant <br />controls of nutrient loads in the future. <br /> <br />If you have questions on the information provided, please feel free <br />to notify us. <br /> <br />Sincerely yours, <br /> <br />/s/ John A. Green <br /> <br />Regional Administrator <br /> <br />56 <br />