Laserfiche WebLink
v <br /> CANtBR9A <br /> groundwater from well EW-1 at approximately five gallons per minute. An estimate of <br /> contaminant mass removed by the GWE system is summarized in the following table. <br /> MASS REMOVAL BY GROUNDWATER EXTRACTION <br /> Constituent Total Removed <br /> Total Hydrocarbons 1.8 lbs <br /> MTBE 15.2 IN <br /> Water 2,295,500 gals <br /> During the June 19, 2001 meeting with San Joaquin County Public Health Services (SJCPHS), <br /> Equiva, and Cambria, it was agreed that Cambria would shut down the GWE system for the third <br /> and fourth quarters of 2001 and monitor gasoline constituent concentrations to determine if there <br /> is any rebound in concentrations. <br /> Cambria evaluated the groundwater sampling data collected from monitoring wells at this site <br /> since the GWE system was shut down. The groundwater analytical data suggest that there has <br /> been no rebound in gasoline constituent concentration since the GWE system was shut down. <br /> Gasoline constituent concentrations remain low or below laboratory detection limits in all wells at <br /> this site. We recommend leaving the GWE system shut down and continued groundwater <br /> monitoring at this site. <br /> ANTICIPATED THIRD QUARTER 2002 ACTIVITIES <br /> Blaine will gauge and sample all wells and tabulate the data. Cambria will prepare a groundwater <br /> monitoring report. <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Groundwater analytical data from well MW-6A from the previous two quarters showed low level <br /> detections of MTBE. However, this quarter, MTBE was not detected in this well. MTBE <br /> rnnrpntr5i6nne ;n tliP nthpr etta NuAlle %i/PTP s-;fbPr halnni wnnr;nn limits nr l^-- +l.an l.,ash <br /> _-__-----___----- --- ---- �---- ---- ••---- ..___ ----__- �--.,.. --rte^-- -a --...__.. .._ _.....,. ....�.. . �,. <br /> quarter's concentrations. One exception to this was a slight increase in MTBE concentration in <br /> MW-4B, which was 0.75 ppb last quarter and is 0.82 ppb this quarter. <br /> 0324 2 <br />