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Site Reclamation Activity <br /> April 1999 - March 2000 <br /> Page 9 <br /> 2) American Tunnel area <br /> a) Cement Creek above (CC1/CC1A/CC1B) and below (CC2) <br /> complex. <br /> b) Springs in the area of the now reclaimed waste dump <br /> (ATS1, ATS2) . <br /> 3) Eureka Creek between Sunnyside Basin and the Terry Tunnel <br /> (EC1) . <br /> 4) Mine Pool <br /> a) American Tunnel <br /> b) Terry Tunnel <br /> MONITORING - Discussion of Water Quality Monitoring Results <br /> 1) Mayflower Millsite area <br /> The Animas River and Boulder Creek monitoring results <br /> continued to exhibit increased zinc and manganese <br /> concentrations between the upstream and downstream <br /> monitoring points during the spring sampling event although <br /> the differential was significantly less for the spring, <br /> 1999 sample. Summer or fall sampling events have continued to <br /> show smaller or no significant change between these same <br /> points. The fall Boulder Creek sample differential was <br /> comparable to the spring sample differential in 1999. This is <br /> most likely due to the continuous summer rains experienced in <br /> 1999. If the diversion projects completed in 1999 have an <br /> impact on water quality, differentials should decrease <br /> although influences from natural groundwater quality and other <br /> sources will still exist. <br /> Other surface and groundwater sample results in the Mayflower <br /> Mill area (Pond No. 3 stream SCTP31 and SCTP32 and Wells EOMW1 <br /> and EOMW2) were at or below levels of metals observed in the <br /> past. <br /> 2) American Tunnel area <br /> Cement Creek monitoring reflects some improvement due to <br /> stream treatment. Seeps entering the stream bed between CC1 <br /> and CC2 carry enough metals that CC2 quality is not the same <br /> as treated effluent from the American Tunnel treatment system <br />