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fi 1 Il■ <br /> C A M B R I A <br /> i <br /> Screened Intervals The screened intervals for wells MW-7 through MW-9 extend <br /> from 55 to 70 fbg <br /> Well Development/Sampling Blaine gauged and developed the new wells on June 4, 2004 <br /> All site wells were then gauged, purged, and sampled on <br /> June 15, 2004 Appendix D presents Blaine's groundwater <br /> monitoring and well development report <br /> Wellhead Survey On May 21, 2004, Virgil Chavez Land Surveying (licensed land <br /> I <br /> surveyor No 6323) of Vallejo, California surveyed the top of <br /> casing elevations for wells MW-7 through MW-9 relative to <br /> mean sea level and surveyed the wells' latitude and longitude <br /> (Appendix F) <br /> Groundwater Flow Direction Cambria prepared a groundwater contour map using the water <br /> level measurement data collected on June 15, 2004 from the site <br /> wells (Figure 3) Groundwater flow direction is generally <br /> • towards the east at an approximate hydraulic gradient of 0 003 <br /> feet/feet <br /> Groundwater Elevations Static groundwater elevations gauged on June 15, 2004 ranged <br /> I <br /> from 34 92 to 35 30 feet below mean sea level <br /> HYDROCARBON DISTRIBUTION IN SOIL <br /> No TPHg, BTEX, or fuel oxygenates were detected in soil samples collected from well borings <br /> MW-7 through MW-9 <br /> The soil chemical analytical data (including data from previous investigations) are summarized <br /> in Table 2, and TPHg, benzene, and MTBE concentrations are presented on Figure 2 <br /> I <br /> Laboratory analytical reports are presented in Appendix E <br /> 1 <br /> , <br /> I I I <br /> 0953 5 <br />