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• <br /> Mr. Fernando Amador -3- 6 April 1995 <br /> to "Contour Interval" shows "Total PNAs' instead of benzene. The significance of not detecting <br /> sulfide in the ground water should be explained in the memo. <br /> 9. Section 4.0, Conclusions and Recommendations <br /> The ground water flow direction in Zones A, B, and C has not been fully defined. Therefore, it is <br /> premature to discuss upgradient or downgradient directions. As stated in Item 8 above, the PNA <br /> plume has not been defined in all directions in all zones. The benzene plume has been defined in <br /> Zone A but not in Zones B and C. <br /> The memo frequently referred to contamination in MWs 14, 15, and 16 which are allegedly <br /> upgradient of the site. As stated in Item 7, PG&E should determine if offsite sources have <br /> contributed any contamination to PG&E's plume. <br /> 10. The lithologic log for NW-IR was not included in Appendix A. <br /> If you have any questions, please call me at (916) 255-3049. <br /> PHILI] ISORENA <br /> Associate Engineer <br /> PSI:psi <br />