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I I <br /> f C 1 <br /> � I <br /> I <br /> r 15 September 2003" <br /> AGE-NC,Project No 97-0333 ( I I <br /> Page 7,'4 lit <br /> I ' <br /> I <br /> determining the difference between ground water elevations (dh) and dividing by the difference of <br /> ' the[screen Interval midpoints (dl) Generally, a pronounced downward gradient was.observed <br /> between the First Zone and the upper Second Zone at all three well locations, and between the lower <br /> Second Zone and the upper Primary Zone at wells MW-11 and MW-12 ,A pronounced upward <br /> gradient was observed at wells MW-11 and MW-12 between the upper,and lower Second Zone i <br /> Neutral gradients were observed at all other locations <br /> The 05 June 2003 ground water elevation data collected from the Rainwater Car Wash site was <br /> plotted for the Informal First Zone, Second Zone, Third Zone and Primary Aquifer Zone <br /> ' hydrogeologic flow units, and are depicted in Figures 4 through 7 <br /> I <br /> ' 3 5 1 1 First Zone Aquifer <br /> I <br /> Ground water elevation data collected in the First Zone Aquifer (15 to 47 feet bsg) Inferred an <br /> inward-radiating ground water flow towards a ground water depression in the area bf well MW-3 <br /> (Figure 4), ground water gradients ranged from 0 002 ft/ft or less to greater than 0 02 ft/ft within the <br /> depression <br /> F <br /> I � <br /> I11 , IE� I <br /> 3 5-12 Second Zone Aquifer <br /> ' II <br /> Ground water elevation data collected in the Second Zone Aquifer (58 to 92 feet bsg) inferred a <br /> northwest ground water flow direction, Ground water gradients were approximately 0 001 ft/ft or <br /> i less near the site (Figure 5) <br /> 113 5 1 3 Third{Zone Aquifer I r <br /> Ground water elevation data collected in the(Third Zone Aquifer(102 to 120,feet bsg) inferred an <br /> ' outward-radiating ground water flow from an apparent northwest-southeast trending ground water <br /> mound in the area of wells MW-7D, MW-11'D and MW-12D (Figure 6) Ground water gradients <br /> were estimated at'approximately 0 062 ft/ft or less ?; "If <br /> ' I <br /> 3 5 1 4 Pnrnary Aauifer Zone <br /> ��0 <br />' l 'Ground water elevation data collected in'the Pnmary,Aquifer'Zone(128 to 150 feet bsg)inferred an, <br /> inward-radiating ground water flow from an apparent northwest-southeast,trending ground water' , <br /> r I „ „ <br /> ' <br /> � ' `' <br /> li ilI Illi <br /> f I f E Advanced GcoEnv ran <br /> � i mental,Inc <br /> I <br />