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JIAM B R IA <br /> RW-lA on a biweekly basis Vacuum truck events were discontinued after the July 17, 2001 <br /> event <br /> On June 20, 2001, a permanent GWE and treatment system began removing groundwater, <br /> treating it, and discharging it directly into the sanitary sewer system. GWE system analytical <br /> data and GWE system mass removal data are presented in Table 1 and Table 2, respectively <br /> Methyl tertiary butyl ether (MTBE) concentrations and mass removal from well RW-lA are <br /> depicted in Figure 3 Volume and mass removal data for vacuum truck operations and the <br /> permanent GWE system, through February 28, 2005, are summarized in the table below <br /> Mass TPHg Mass MTBE Volume <br /> Removed (pounds) Removed (pounds) Groundwater <br /> Removed(gallons) <br /> Vacuum Truck 397 671 622,649 <br /> Operations <br /> Permanent GWE 659 810 2,435,077 <br /> System <br /> • Total(GWE) 1,056 1,481 3,057,726 <br /> During the first quarter of 2005, Cambria operated the GWE system in compliance with the City <br /> of Stockton Groundwater Discharge Permit The GWE system was shut down from <br /> December 14, 2004 through January 18, 2005 pending carbon replacement activities The GWE <br /> system was again shut down between February 28, 2005 and March 30, 2005 for LEL meter <br /> sensor repair and carbon replacement <br /> ANTICIPATED SECOND QUARTER 2005 ACTIVITIES <br /> Blaine will gauge and sample the site wells according to the established sampling schedule and <br /> tabulate the data Cambria will prepare a groundwater monitoring report Cambria will continue <br /> to operate the GWE system <br /> Cambria is preparing a report which documents over excavation activities that took place in late <br /> 2004 This document will be submitted during the second quarter of 2005 and will include a Site <br /> Conceptual Model and a work plan for reinstallation of well MW-5 <br /> i <br /> 0783 2 <br />