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• <br />X AN E PROPRIETARY & CONFIDENTIAL <br />Mine Water Treatment — Peabody Energy Page 15 of 48 <br />5.4 Waste Stream Volume and Quantity <br />The Water Treatment System consist of a double pass reverse - osmosis system <br />with the primary goal reduce the Total Dissolved Solids (TDS) and significantly <br />minimize the system's overall waste stream. The reject or condensate from the <br />primary reverse - osmosis system will be passed to the secondary reverse - osmosis <br />system for treatment. The subsequent reject or condensate from the secondary <br />reverse - osmosis system will be added back into the influent stream at a rate of 8 to <br />36 GPM, essentially completing a closed loop system The overall system capacity <br />has been adjusted to accommodate this return reject stream. <br />Table 4: Waste Stream Matrix <br />• <br />:System Component <br />Source: <br />Collection Point <br />Estimated' <br />Quantity: <br />Pre - Treatment Water <br />None <br />None <br />None <br />System <br />Multi -Media Filter <br />Solids Collection <br />30 — 120 Lbs. <br />Solids Separation <br />Backwash <br />Tank <br />per Day <br />System <br />Settling Tank <br />Solids Collection <br />1 — 5 Lbs. per <br />Solids <br />Tank <br />Hour <br />PR0450 RO <br />Reverse - Osmosis <br />Discharges to <br />g <br />(SEE Section <br />Condensate <br />PR0200 RO <br />7.1) <br />Water Treatment <br />System <br />PR0200 RO <br />Reverse - Osmosis <br />Returned to influent <br />None <br />Condensate <br />source <br />Solids <br />Solids Management <br />Backwash and <br />management <br />System <br />settling tanks <br />Dewatering System <br />range from 25 to <br />100 Ibs dry basis <br />per day. <br />Calculations based on i uu million gallons per year as supplied by TCC on 6/29/09 <br />• <br />Document Version: 4.0 © Water Tectonics, Inc. 2008. All rights reserved. <br />W WATERTECTONICS <br />