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CAMBRIA <br /> directly into the sewer system GWE system analytical data and GWE system mass removal data <br /> are presented in Table 2 and Table 3, respectively MTBE concentrations and mass removal <br /> from well RW-lA are depicted in Figure 3 Volume and mass removal data for vacuum truck <br /> operations and the permanent GWE system 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 567 712 1,845,710 <br /> System <br /> Total (GWE) 964 1383 2,468,359 <br /> ANTICIPATED FOURTH QUARTER 2003 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 <br /> The City of Stockton has advised us that they may be altering their discharge limits for our GWE <br /> system effluent in the near future The discharge limits for fuel oxygenates may be set at non- <br /> detect levels We will make appropriate design changes to our treatment system if the discharge <br /> limits are changed <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> The petroleum hydrocarbon and MTBE concentrations in groundwater samples collected from <br /> the shallow wells this quarter are within the historical norm for this site Wells MW-5 and <br /> RW-lA continue to contain the highest levels of hydrocarbons and MTBE <br /> Cambria recommends continued operation of the GWE system and continued monitoring and <br /> sampling of site monitoring wells to evaluate concentration trends at the site <br /> • <br /> 0783 2 <br />