FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

March 23,2006 NOA PROJECT NUMBER E05131A Table 2: Monitoring o tortng Well Ground Water Information ' Depth Ground Depth of Total Well Ref. to Water Water monitoring Boring Direction of Elev. ID Elevation well Depth Flow Gradient ' (TOC) (TOC) (ft) (ft) (TOC)(ft) (bgs)(ft) MW-1 43.21 48.50 -5.29 61.28 59.0 ' MW-2 45.64 51.17 -5.53 62.68 59.5 S 70 E 0.0009 MW-3 44.17 1 50.87 -6.70 61.72 60.0 TOC-Top of Casing bgs-Below Ground Surface ' Review of the ground water elevation data shows that the measured direction ofg roundwater flow beneath the site is to the southeast with a calculated hydraulic gradient of approximately 0.0009 feet/foot. The indicated direction and gradient are consistent with the reported data for the site showing an easterly direction of groundwater flow and hydraulic gradient of approximately 0.0004. Contoured groundwater elevation data from the March 20, 2006 sampling event are shown in ' Appendix A - Plate 3. Appendix E - Cumulative Tables - Table 1 shows the summary of groundwater elevation data accumulated to date from the site. 4.2 Monitoring Well Sampling Event Wells were then purged of three standing volumes of water, or until dry,using a new disposable bailer ' at each well. Purge water was monitored for pH, specific conductance, total dissolved solids, and temperature during purging, and purge water was disposed of on the ground. Field Sampling Sheets for the March 20, 2006 sampling event are presents in Appendix F - Field Sampling Sheets. Groundwater samples were collected by emptying the disposable bailers directly into appropriate laboratory containers which were then labeled,and temporarily stored on ice. Samples were transported on ice,under proper chain of custody documentation to Argon Laboratories (A Certified Laboratory) ' for analysis. Results of laboratory analysis of groundwater samples for the March 20, 2006 sampling event are summarized in Table 3. Copies of the laboratory analytical data sheets are included in Appendix C. Appendix E - Table 2 shows cumulative groundwater analytical data for the site ' arranged in time series and sorted by analytical constituent and well. The time series arrangement of analytical data shown in Appendix E-Table 2 is useful for identifying annual fluctuations and longer term variations in groundwater quality.