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age 2 <br /> Descriptive literature on one clarifier system (Eimco Delta-Stak) is attached. Quotes have <br /> also been received from Mantes Chemical Systcros and Goble Sampson Assoc. <br /> Foocculants <br /> Following our meeting on July 11, samples of mine drainage were taken to Hazen Research <br /> and a series of clarification tests run in the lab using other flocculants. <br /> gar um <br /> Descriptive literature on guar gum is attached. A cationic guar, MRL 100, appeared to <br /> perform the best: <br /> Guar Dose nnm Clarification TSS <br /> Time, Hours npm <br /> 4 0.45 <br /> 4 �� 31 <br /> 3 <br /> An MSDS from Hi-Tek Polymers does not include environmental information. A second <br /> manufacturer, Aqualon, was contacted for samples of their cationic and standard guars•and <br /> also environmental data. Mr. Ralph Pettit, district manager, of Aqualon said toxicologic <br /> studies on fish were made by General Mills (former owner of Aqualon) for Dow Chemical <br /> and will forward report when located. He also said it is being used in paper mills to treat <br /> white water before discharge and off-shore oil drilling. <br /> Nalco_ 1170 (Acrylamide Polymer) <br /> The city of Arvada water treatment superintendent was contacted to see what flocculant <br /> they use in water treatment. He described the additive as Nalclear 8170 <br /> An MSDS is attached and includes some aquatic data. (See p.4 of MSDS). It reports 96 <br /> hour static acute LC50 to Rainbow Trout = greater than 100 ppm and less than 1000 p m. <br /> A lab test showed the following effectiveness on amine drainage sample taken July11: <br /> Nalclear 8170 Dose m <br /> • Clarification TSS <br /> 2 Time, Hour nnm <br /> 4 i 16 <br /> 10 <br /> The data indicate that either of the two flocculants described above would be <br /> treating mine discharge and clarification in either the 016 ponds or an inclinedtplate <br /> clarifier, pending approval from MLRD and Colorado Dept. of Health. p <br /> Sincerely, <br /> All <br /> JER:ps - <br /> J•E• Rey olds <br />