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Table 5 <br /> Historical Groundwater Gradient Data <br /> Chevron Service Station#9-4275 <br /> 2905 West Benjamin Holt Drive . <br /> and <br /> ARCO Service Station#2133 <br /> 2908 West Benjamin Holt Drive <br /> Stockton, California <br /> f" l 14 " �; s, , v- , , Approximate s <br /> ��s Approximate flow, ti' J " <br /> Date Sampled �� �� E` �� 1, ,,Hydraulic- <br /> , <br /> � aDirection p " <br /> Gradlent az <br /> 03/10/99 Radial North-Northeast 00007 <br /> 06/22/99 Northwest 00009 <br /> 09/13/99 North-Northeast 0 001 <br /> 12/15/99 Variable -- <br /> 03/23/00 Northeast 0 002 <br /> 06/21/00 Northeast/Variable 0 002 <br /> 09/13/00 Northeast 0 002 <br /> 12/15/00 - - - Northeast 0 002- <br /> .03/02101. <br /> 02.03/02101. _Northeast 0002 <br /> 05/10/01 <br /> 002 <br /> 05/10/01 Northeast to Northwest 0 001-0 005 <br /> ~ � —08122/01— North to Northeast� —0 002=0 004 <br /> 12/05/01 Northeast to Northwest 0 003 <br /> 03/11/02 Northeast to Northwest 0002-0004 <br /> 06/06/02 Northeast to Northwest 0007-0004 <br /> 09/24/02 North to Northeast 0007-0003 <br /> - 12117/02 North 0 009 <br /> 03/18/03 North 0 002 <br /> 06/17/03 North 0 002 <br /> 09/24/03 South 0 003 <br /> 12/18/03 North 0 003 <br /> 03/17/03 North 0 003 <br /> 6121 -6/29104 North-Northeast 006-0006 <br /> 09/21/04 North-Northeast 0 001 -0004 <br /> 12/28/04 North-Northeast 0005-0009 <br /> 03/07/05 North-Northeast 0 003-0 004 <br /> 06/30/05 North-Northeast 00025 <br /> 09/22/05 Northwest, Eeast-Southeast 0 0017, 0 00095 <br /> 11/18/05 Northeast 0 002 <br /> 03/20/06 North-Northeast 0 003 <br /> 06/19/06 North-Northeast 0 001 <br /> Notes <br /> a=flow direction and gradient could not be <br /> calculated due to influence of remediation system <br /> --= not applicable <br /> 2133 QMR-Tables 2&4 Page 2 of 2 SECOR <br />