ARCHIVED REPORTS XR0001829 - Laserfiche WebLink

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1 Data Provided with this Report i Regional Site Location Map(Figure 1) ' Topographic Map of Site(Figure 2) Site Activity Map(Figure 3) Map Depicting Groundwater Flow Direction(Figure 4) ' Hydrograph and TPH-Gas and Benzene Concentrations for PT-MW-1 (Figure 5) Monitoring Well Soundmg Data(Table 1) ' Summary of Monitoring Well Sounding Data(Table 2) Summary of Water Sample Analytical Results(Table 3) Summary of Individual Monitoring Well Water Sample Results(Table 4) ' Appendix 1- Groundwater Monitoring Procedures Appendix 2- Groundwater Monitoring Well Data Logs ' Appendix 3- Analytical Laboratory Reports for Samples Collected from the Wells ' 2.0 GROUNDWATER MONITORING AND SAMPLING 221 Groundwater Monitoring ' Groundwater monitoring wells for the 521 North Cherokee Lane (former Parmar Texaco site)were monitored on June 11, 2004 The locations of the monitoring well are depicted on both Figures 3 and 4 All well monitoring and sampling was conducted in accordance with the monitoring procedures outlined in the attached Appendix 1 and by verbal directives issued by PHSEHD The wells were initially inspected ' for integrity and general maintenance condition with the findings reported on the Monitoring Well Data Sheets presented in Appendix 2 The wells were then probed for depth to the groundwater surface and depth to bottom of each well Initially, the depth to water surface was measured by an electronic water level indicator that allowed measurement of depth to approximately 0 01 foot These water surface depths for each well were then ' recorded on the individual monitoring well data sheets contained in Appendix 2 After depth to water was determined, a clear, acrylic bailer was used to visually inspect an undisturbed sample from the top of the water column to determine if a product layer or sheen was present A pronounced sheen and product layer ' was visible on the tape and the bailers used to sample monitoring walls MW-1, 2, and 3 These wells had a slight free-product layer at least 0 005 foot thick All other wells had no reported petroleum hydrocarbon actor or sheen on the water surface The water level indicator was then used with a weight to measure the total depth of each monitoring well in order to determine the volume of water in each well casing volume These measurements and the Icalculated well casing volume for each well was recorded in Appendix 2 Each of the wells was then purged with a low-purge rate submersible electric water pump or hand bailed ' using a disposable bailer Groundwater electrical conductivity, pH, and temperature were all recorded as each casing volume of water was removed from the wellbore Data was recorded on the Monitoring Well Data Sheets Groundwater monitoring results are tabulated in Tables 1 and 2 Once the groundwater ' parameters were stabilized a water sample was collected • Ma-D\Envunnmmm]\PwmarTexaco\Repom\063004QMR wN 2 I