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low <br /> R.W. Reade <br /> Page 2 <br /> PHS/EHD does not agree with your findings that soil contamination left in <br /> place at 22 feet below ground surface (bgs) 'would pinch to 0 ppm at a depth <br /> of 26 feet". Data has not been submitted to PHS/ED to support this <br /> conclusion. PHS/EHD considers further investigation warranted to determine <br /> the vertical and lateral extent of this soil contamination. If, after data is <br /> received and reviewed by PHS/EHD, your recommendation is to leave this soil <br /> in the ground, the potential impact on groundwater below this soil is to be <br /> evaluated using guidelines detailed in both the L.U.F.T. manual and Tri <br /> Regional guidelines. <br /> Prior to any discussion of site closure, PHS/EHD requires the submittal of the <br /> above missing information by June 15, 1992. Based on the review of these <br /> documents,PHS/EHD will determine if MW#3 is serving its intended purpose. <br /> If you have any questions please contact Michael Infurna, Senior RENS, of my <br /> staff at (209) 468-3454. <br /> Jogi Kh M.D., M.P.H. <br /> Health r <br /> urie A. Cotulla, REH , Program Manager <br /> nvironmental Health Division <br /> LAC/1VII:lb <br /> c: T.P. Tiscornia, Jr. <br /> P.O. Box 1115 <br /> Zephyr Cove, NV 89448 <br /> c: WHF <br /> P.O. Box 6729 <br /> Modesto, CA 95355-6729 <br />