Laserfiche WebLink
' Crealagical Ttcl nlrs lncc Page 6 <br /> Groundwater Moratonng Report <br /> Project No 770 2 <br /> August 27,2004 <br /> Well MW-4 lies adjacent to the former UST field Figure 7-MW-4 TPH-D vs Groundwater <br /> Elevation suggests that a predominantly inverse relationship exists between groundwater t <br />' elevation and contaminant concentrations <br /> Well MW-5 continues to contain the highest concentrations of detected contaminants (see <br />' Figure 8) It has not been down gradient of the former UST location for the monitoring <br /> events completed by GTI to date The reason for this anomaly is not known, but could be <br /> related to geologic units that slope to the west None of the deep wells contained laboratory <br /> contaminants concentrations above the laboratory reporting limits and therefore a contour <br /> diagram was not developed <br />' In Figure 9— MW-5 & MW-105: TPH-D versus Groundwater Elevation, well MW-5 <br /> contaminant concentrations have previously correlated with changes in the water table Since <br /> September 2001 the relationship has been reverse Well MW-105, screened below the water <br />' table, exhibits a typically inverse relationship between contaminant concentrations and <br /> groundwater elevation <br />' GTI makes the following recommendations <br /> Maintain the quarterly monitoring schedule <br /> • Develop a conceptual model for the site to determine if there are data gaps that should be <br /> M) addressed prior to performing additional site characterization work - SG�'1 -� <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 protect were reviewed and approved by the <br /> local regulatory agency for compliance with the law No warranty, expressed or implied, is <br />' made <br />