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DELTA DISPOSAL QUARTERLY <br /> GROUNDWATER MONITORING DATA, DEC. 2008 TO AUG. 2009 <br /> Table 6. Groundwater Monitoring Well Water Level Data <br /> Date Well Number Depth to Top of Casing Groundwater Comments <br /> Sampled Groundwater ft Elevation ft Elevation ft <br /> Dec. 19,2008 MW-1 15.56 60.46 44.90 None <br /> May 12,2009 15.60 44.86 None <br /> Aug. 10,2009 16.19 44.27 None <br /> Dec. 19,2008 MW-2 16.36 61.07 44.71 None <br /> May 12,2009 16.30 44.77 None <br /> Aug.10,2009 16.88 44.19 None <br /> Dec. 19,2008 MW-3 16.64 61.15 44.51 None <br /> May 12 2009 16.75 44.40 None <br /> Aug. 10,2009 17.20 43.95 None <br /> City of Tracy surveyed Top of Casing elevations in feet,NGVD. <br /> Table 7. Historic Groundwater Monitoring Well Chemical Analysis Results <br /> Date Well TPHD TPHG Ben Tol Ethyl Xyl TBA MTBE DIPE ETBE TAME 1-2, EDB Eth Meth <br /> Number DCA <br /> U /I U /I U /I U /I U /I U /I U /I U /I U /I ug/1 ug/1 ug/1 U /I Ug/1 U I <br /> 12/19/09 MW-1 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 5/12/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 8/10/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 12/19/09 MW-2 1300 ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 5/12/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 8/10/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 12/19/09 MW-3 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 05 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 5/12/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 1 <50 0.5 1 0.5 0.5 f 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> 8/10/09 ND ND ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< ND< <br /> <50 <50 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.50 <br /> StateL <br /> None None 5 150 300 1750 None 13 None None None 0.5 None None None <br /> Ug/I - Micrograms per liter. ND - None detected. " - Laboratory reports that some hydrocarbons lower <br /> boiling,some higher boiling than Diesel. See laboratory reports for complete results. <br /> Pa oP 16 of 17 <br />