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' C,ealogica(reCkitICS lrtc AP Page 7 <br /> Groundwater Monitoring Report <br /> Project No 770 2 �'V� <br /> February 7, 2005 <br /> ' screened below the water table, exhibits a typical on/off trend {alternating between detecting <br /> diesel at —100 µg/l to ND<50 µg11), thus suggesting that the vertical extent of the diesel <br /> ' plume is near the depth interval of MW-105 <br /> Figure 10 illustrates the distribution of diesel in the deeper wells The data is skewed toward <br /> ' the single detection point in well MW-105 <br /> GTI makes the following recommendations <br /> ' • Maintain the quarterly monitoring schedule <br /> • Analyses for 1,2 DCA and EDB by EPA Method 8260 have been completed for three <br /> consecutive events and have been found to be non-detect These analyses should' b1, Jan discontinued to achieve laboratory cost savings r-6�v a PPrw'� °m'W� `J z Dvffd'Vb .17 suoS <br /> • In response to the comments from S7CEHD on the site conceptual model report, we <br /> recommend that an additional site characterization work plan and interim remedial action <br /> ' plan be implementation ASAP 6 0 T f --m -,'a a;f� 'r,?vc.n'F� +� <br /> n 1�i'1�Gl�'c.til �l�. �avS• <br /> ' 3.0 LIMITATIONS <br /> This report was prepared in accordance with the generally accepted standard of care and <br /> practice in effect at the time Services were rendered It should be recognized that definition <br /> and evaluation of environmental conditions is an inexact science and that the state or practice <br /> of environmental geology/hydrology is changing and evolving and that standards existing at <br /> the present time may change as knowledge increases and the state of the practice continues to <br /> improve Further, that differing subsurface soil characteristics can be experienced within a <br /> small distance and therefore cannot be known in an absolute sense All conclusions and <br /> ' recommendations are based on the available data and information. <br /> The tasks proposed and completed during this project were reviewed and approved by the <br /> local regulatory agency for compliance with the law No warranty, expressed or implied, is <br /> made <br /> 1 <br /> 1 <br /> 1 <br />