Laserfiche WebLink
Trend analysis also notes an increasing trend in TDS this quarter at this well. The increasing trend <br /> in TDS is also related to the trend in EC. Because of these trends in the landfill's upgradientt well, <br /> 1 increasing levels of EC and TDS in the downgradient wells should be expected. <br /> No VOCs were reported in MW-1 this quarter. <br /> MW-2 <br /> MW-2 is an impacted well. <br /> No general water quality parameters were exceeded in MW-2 this quarter. A statistically significant <br /> increasing Chloride trend continue this quarter. However, the Chloride concentration this well <br /> (24 mg/L) is far below the secondary maximum contaminant level of 250 mg/l. <br /> Trend analysis indicates an increasing trend for Turbidity this quarter. However, it is unlikely that <br /> the increasing tend in turbidity is a result of landfill activities. The increase in turbidity could be due <br /> to siltation within the well. This trend will be monitored in future reports to determine if action is <br /> necessary. <br /> Three VOCs, Tetrachloroethene(PCE), 1,2-Dichloropropane, and Dichlorodifluoromethane were <br /> reported this quarter. These compounds are those historically impacting this well. <br /> Trend analysis indicates an increasing trend for both 1,2-Dichloropropane and PCE this quarter. The <br /> vacuum at landfill gas wells in the vicinity system has been increased to reverse this trend. <br /> MW-3 <br /> EC was detected in well MW-3 at a concentration of 241 uS/cm, which exceeded its tolerance limit <br /> of 130 uS/cm. However, it did not exceed the secondary maximum contaminant level of 900 uS/cm. <br /> 1 An increasing trend in Chloride continues thisuart <br /> q er, however, Chloride concentrations are <br /> generally lower in the past nine quarters. Because this fluctuation also occurs in the upgradient well, <br /> we believe that changes in groundwater quality are due to natural fluctuation of groundwater quality <br /> in the region. This was noted in previous reports (beginning with the second quarter 2004) and <br /> continues at present. <br /> An increasing trend in turbidity was also noted this quarter. However, it is unlikely that the <br /> increasing tend in turbidity is a result of landfill activities. The increase in turbidity could be due to <br /> siltation within the well. This trend will be monitored in future reports to determine if action is <br /> necessary. <br /> 1 <br /> Hamey Lane Sanitary Landfill Department of Public Works/Solid Waste <br /> 1t Quarter 2007 Groundwater Monitoring Report County of San Joaquin—April 15,2007 <br /> 5 <br />