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MEMO <br /> District Board,Leadville Sanitation District <br /> Union Milling Permit M1990-OS7(Version 4) <br /> Job No.:1119.2e <br /> August 24,2021 <br /> Page 2 of 4 <br /> ZUNI <br /> PLACER <br /> I Fm we..av�.�c� <br /> I Lc 1oaa "Cu <br /> Fihtiu85®+N'Scwa(,ue _---(SS <br /> Tamp Pa <br /> iq®dotio. �C <br /> FW Rebr wMed > <br /> P Cap LS9024 <br /> C <br /> Do Rads(•PP— l <br /> m <br /> C- a <br /> z <br /> T.Nw Pwd I 12 <br /> --- ® <br /> T.I.v o— <br /> (Mo—zr ! "..d... <br /> WW <br /> r � I <br /> _----V <br /> errs 9 sesftw - - <br /> sr�'�pp1,w <br /> Figure 1.Existing Sanitary Sewer line. <br /> The District is currently under a compliance schedule to reduce inflow and infiltration into the collection system. <br /> Inflow is water,other than wastewater,that enters a sewer system from sources such as roof leaders,cellar drains, <br /> yard drains,area drains,foundation drains,drains from springs and swampy areas,manhole covers,cross sections <br /> between storm drains and sanitary sewers,catch basins,cooling towers,storm waters,surface runoff,street wash <br /> waters or other drainage. Inflow does not include,and is distinguished from, infiltration. Infiltration is water other <br /> than wastewater that enters a sewer system(including sewer service connections and foundation drains)from the <br /> ground through such means as defective pipes,pipe joints,connections,or manholes. Infiltration does not include, <br /> and is distinguished from, inflow. <br /> The new crushing facility could impact the collection system by disturbing the manholes,pipes and service lines <br /> resulting in an increase in the infiltration of groundwater into the collection system.This increase in infiltration is in <br /> direct conflict with the CDPHE compliance schedule to reduce inflow and infiltration into the collection system. <br /> Damage to the collection system could also result in exfiltration or seepage of wastewater into the ground. <br /> The District is also under the Colorado Department of Public Health and Environment(CDPHE/Division),Water <br /> Quality Control Division Notice of Violation/Cease and Desist Order, Number: DO-181109-1(NOV/CDO)dated <br /> November 9,2018.The NOV/CDO sited a failure to comply with permit effluent limitations,specifically for the 30-day <br /> average mercury limit of 0.077 ug/L.The District is required to follow a compliance schedule to identify sources of <br />