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Geospte& <br /> consultants <br /> within the A-Zone aquifer beneath the site generally flows to the east-northeast <br /> (ARCADIS, 2011). <br /> The results of an aquifer-pumping-test conducted at the site in March 1997 indicate that <br /> the transmissivity of the A-Zone aquifer at the eastern boundary of the site (monitoring <br /> well MW-101A) ranges from approximately 0.4 to 3.4 square feet per minute (4,500 to <br /> 36,000 gallons per day per foot [gpd/ft]). Assuming an average aquifer thickness of <br /> 25 feet, these transmissivity values are equivalent to hydraulic conductivities of 0.017 to <br /> 0.134 foot per minute (24.5 to 193 feet per day [ft/day]). The estimated storativity of <br /> the A-Zone aquifer ranges from 0.0019 to 0.05 (LFR, 1999). <br /> B-Zone <br /> A pumping test was performed in B-zone groundwater extraction well GEW-29B <br /> (downgradient from the site, on Inglewood Avenue) in 2001 indicates that the <br /> transmissivity of the B-zone aquifer ranges from 5,000 to 15,000 gpd/ft. Assuming an <br /> average thickness of 40 feet, these transmissivity values correspond to hydraulic <br /> conductivities of 17 to 51 ft/day (LFR, 2002). The results of an additional aquifer- <br /> pumping-test conducted downgradient from the site in February 2010 confirmed the <br /> results from the 2001 pumping test. Groundwater-elevation measurements in B-Zone <br /> monitoring wells indicate that groundwater in the B-Zone aquifer generally flows to the <br /> northeast(ARCADIS, 2011). <br /> C-Zone <br /> The distribution of hazardous substances in groundwater in these units suggests that the <br /> B/C aquitard is competent and has impeded the migration of chemically affected <br /> groundwater from the B-Zone aquifer to the C-Zone aquifer(LFR, 1999). Groundwater <br /> in the C-Zone aquifer generally flows toward the northeast(ARCADIS,2011). <br /> Vertical Gradients <br /> In general, water level measurements within the A-, B-, and C-Zone wells indicate that <br /> there is not a dominant vertical flow direction between the hydrostratigraphic units. <br /> 2.2 SITE HISTORY <br /> Lincoln Center is a commercial property located in Stockton, California (Figure 1). <br /> Portions of the property occupied by Lincoln Center are currently owned by Lincoln <br /> Properties, Ltd. (LPL), and the remainder is owned by Metro Properties (the Fahn <br /> property) (Figure 2). Past dry-cleaning and waste-handling practices included disposal <br /> Pre-Design Investigation Work Plan 6 18.05.12 <br />