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<br />depicted on the attached figure. This azea is at a distance of approximately %z-mile upgradient <br />from the deeper of the two SLWSD water-supply wells and should provide adequate -esponse <br />time for implementation of awater-supply contingency plan in the event of the detection of <br />contaminants at this location. It is recommended that the sampling depth of the monitoring <br />well(s) be a 10-foot interval at a depth of 80 to 90 feet below land surface to best conform to the <br />open intervals of the town's water-supply wells which aze believed to be at this general depth. <br />Also, based on the above discussion, it is appropriate to recommend that the SLWSD <br />consider the need for asurface-water detection monitoring program as a means to evaluate this <br />potential contaminant migration pathway to their drinking water source. It is recommended that <br />such sampling be performed at a point within the Rito Seco just upstream to its diver:;ion into <br />Salazar Reservoir. <br />If you should have any questions, please feel free to contact me at 303-312-6595. <br />Sincerely, <br />~~ M~~ <br />Rich Muza, Hydrologist <br />Ecosystems Protection Program <br />Office of Ecosystems Protection and Remediation <br />Attachments <br />cc. Juanita Bemal, SLWSD w/ attachments <br />Mike McGowan, CCCD w/ attachments <br />Jim Dillie, CDNR-DMG w/ attachments <br />Carol Russell, 8EPR-EP w/attachments <br />