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Tier Ts~nnel Mine Water (Leadville, CD)batch neutralization <br />experiments with limestone and pel~hle lime. U5/23/~8. AfC. <br />,a <br />- ~--Limestone <br />is <br />^ ~ Recycled Lwrnestorie <br />--- f nip pe6t~0e lime <br />i° --+3- ip°,'o pebble lime <br />-~-ZS:~d pebble lime <br />Y <br />a <br />E <br />3 ~ #' <br />2 <br />o+ <br />a <br />5 lU 1.5 Z;: '1S 3G 35 ~A^ 43 5C' <br />Tlme [FI4l1YS) <br />small amounts, caused the system to overshoot the target pH, generated a lot of heat and <br />breakdown of the pebble lime, only limestone was used in the flow system experiment. <br />A synthetic Tiger Tunnel MIW water flow system was designed based upon preliminary <br />results from the batch reactors. As stated in the Methods section, synthetic Tiger Tunnel <br />MIW flowed into a reaction vessel contaiiung limestone alone at a rate of 1.82 <br />mL/minute (corresponding to an estimate hydraulic residence time of 0.67 days). <br />Samples for metal analysis and pH were collected from May 20th through June 5th 2008, <br />however, metal analysis data was graphed as a percentage of influent water metals but <br />only for the first 11 days (Figure 2) because there is an up to 30 day turn around time on <br />metals analysis by ICP-AES. The pH was graphed over a period of 20 days (Figure 3). <br />Frg~ter~oa EP~-re1x~rt, Jztne ?~, 200<~ 3 <br />