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131 LA UR 03 5862 - National Nuclear Security Administration ...

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Table 3.8-1. Groundwater Characterization WellsTOTALWELL LOCATIONDATEDRILLEDDEPTH(FEET)P<strong>UR</strong>POSE/FINDINGSR-5 Pueblo Canyon May 2001 902 Investigate regional aquifer, intermediate perchedgroundwater zones, and intercalated unsaturated zonesin the northeast part of <strong>LA</strong>NL.No contaminants in regional aquifer.R-7 Los AlamosCanyonR-8 Los AlamosCanyonR-9, R-9iLos AlamosCanyonJanuary 2001 1,097 Investigate regional aquifer, intermediate perchedgroundwater zones, and intercalated unsaturated zonesin the north-central part of <strong>LA</strong>NL.No contaminants in regional aquifer.January 2002 860 Determine regional aquifer quality down gradient ofreleases in Los Alamos and DP Canyons.Tritium in regional aquifer indicating a component ofwater less than 60 years old.September 1999 771 Determine regional aquifer quality at the Laboratoryboundary down gradient of releases in Los Alamos andDP Canyons.Tritium in perched zones and regional aquifersindicating a component of water less than 60 years old.R-12 Sandia Canyon January 2000 886 Determine regional aquifer quality at the Laboratoryboundary down gradient of releases in Sandia Canyon.Tritium in perched zones and regional aquifersindicating a component of water less than 60 years old.R-13 Mortandad Canyon October 2001 1,133 Examine water quality at the Laboratory boundarydown gradient of releases within the MortandadCanyon.No contaminants detected in the regional aquifer.R-14 Ten Site Canyon July 2002 1,325 Examine water quality near the discharge point for theRLWTF (TA-50).No contaminants detected in the regional aquifer.R-15 Mortandad Canyon September 1999 1,107 Examine water quality down-gradient from thedischarge point for the RLWTF (TA-50).Contaminants detected in the regional aquifer aretritium, nitrate, and perchlorate. None are abovedrinking water standards.R-16 Cañada del Buey August 2002 1,287 Measure water levels and vertical gradients in regionalaquifer in the discharge area.No contaminants detected in regional aquifer.R-19 Mesa south ofThree-MileCanyonMarch 2000 1,9<strong>03</strong> Determine regional aquifer quality at the Laboratoryboundary down gradient of potential releases in upperPajarito Canyon.No contaminants detected in perched or regionalaquifer.R-20 Pajarito Canyon August 2002 1,365 Sentry well for water supply well PM-2.Regional aquifer water quality upgradient of TA-54.No contaminants detected in the regional aquifer.R-21 Cañada del Buey November 2002 995 Evaluate and monitor hydrologic and geochemicalconditions near MDA-L.No contaminants detected in the regional aquifer.R-22 Mesita del Bueyabove PajaritoCanyonOctober 2000 1,489 Regional water quality and water level down gradientof TA-54.Tritium in regional aquifer indicating a component ofwater less than 60 years old.3-28SWEIS Yearbook—2002

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