Laserfiche WebLink
1 <br /> The reversal of trends over the past 3 years may have resulted from the extreme changes in <br /> groundwater elevation,this is illustrated in Figure 9 <br /> 6.2 Data Anomalies <br /> No data anomalies were found during this quarter's sampling <br /> 6.3 Variations from Sampling Procedures <br /> iField testing for natural attenuation indicators of groundwater samples, including pK <br /> conductivity,and temperature,was conducted this quarter <br /> 6.4 Well Conditions and Appearance of Purged Water <br /> ' 6 4.1 MW-1 <br /> Water purged from MW-1 has a slight hydrocarbon odor The seal at grade has been <br /> deteriorating since installation due to the large number of trucks that pass over it daily Also, <br /> t the well cap needs replacement <br /> 6 4.2 MW-2 <br /> rThe water purged from MW-2 has visible floating product but is otherwise clear As with MW- <br /> 1,the seal at grade and the well cap are deteriorating <br /> 6.4.3 MW-3 <br /> MW-3's purged water is cloudy and free from any floating product The well cap needs <br /> 1 replacement <br /> 6 4 4 MW-4 <br /> ' Water purged from MW4 is silty with a slight hydrocarbon odor The well is in good <br /> condition <br /> 6.5 Management of Purge Water <br /> Water purged from MW-i, MW-3 and MW4 as well as decontamination water was placed in <br /> ' e an on-site 55-gallon drum and labeled <br /> E <br /> 6.6 Recommendations <br /> El recommends <br /> ■ Continued removal of floating oil from MW-2 every four weeks until motor oils no <br /> longer appear <br /> ■ Continued quarterly monitoring of the four groundwater monitoring wells at CTL to <br /> accumulate data as a basis for future actions, or to show when contamination levels <br /> have dropped to insignificant levels <br /> L r_ 5 <br />