ARCHIVED REPORTS_2010_2011 ANNUAL MONITORING REPORT

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Table 2 Summary of Groundwater Elevations UPRR Storrie, California First Quarter 2011 Status Report Well Date Casing Depth to Groundwater Location Measured Elevationa Groundwater Elevation (feet msl) (feet) (feet msl) Domestic Well 7/26/2010 27.40 1,764.25 10/12/2010 29.68 1,761.97 1/17/2011 26.75 1,764.90 BST-01A 8/27/2008 1,804.97 39.05 1,765.92 10/7/2008 39.05 1,765.92 11/20/2008 39.96 1,765.01 BST-01 B 8/19/2008 1,805.07 39.71 1,765.36 10/7/2008 40.25 1,764.82 11/20/2008 41.09 1,763.98 12/16/2008 41.03 1,764.04 1/12/2009 40.09 1,764.98 2/9/2009 39.84 1,765.23 3/10/2009 35.54 1,769.53 VEW-03 3/19/2008 1,830.43 39.45 1,790.98 4/24/2008 41.48 1,788.95 VMP-01 1/22/2008 1,811.36 40.33 1,771.03 4/24/2008 40.02 1,771.34 VMP-02 1/22/2008 1,808.76 39.44 1,769.32 4/24/2008 39.69 1,769.07 Notes: *Water level in MW-03A was measured at 52.94 feet on 4/27/09 during the monthly sampling event. This was inconsistent with historic water level measurements so it was re-measured on 5/5/09 resulting in a measurement consistent with historic data. It was later discovered that the water level meter used on 4/27/09 had malfunctioned. **Water level in MW-06 was measured at 46.22 feet on 4/27/09 during the monthly sampling event. This was inconsistent with historic water level measurements so it was re-measured on 5/5/09 resulting in a measurement consistent with historic data. It was later determined that the water level meter used on 4/27/09 had malfunctioned. a = Elevations in feet above mean sea level (msl). b = Feet below top of casing. BST = biosparge test well MW = Monitoring well VEW =Vapor extraction well VMP =Vapor monitoring point Monitoring data collected prior to May 2009 was collected with oversight by CH2M Hill. Table 2-Summary of GW ElevationsAs ARCADIS 11 of 11