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A ENV1RQ?jM[NTAI MEAT Th <br /> s >'F�u9911 �-gVjrE <br /> v "S SEP -9 AM 11: 48 <br /> September 6 , 1996 <br /> Cal/EPA <br /> Mr. Robert Doss, P.E. <br /> Department of Project Manager Pete Wilson <br /> Toxic Substances Pacific Gas & Electric Company Governor <br /> Control Environmental Services <br /> 77 Beale Street, Room F-1636 James M. Strock <br /> 10151 Croydon Way Secretary for <br /> Suite San Francisco, California 94106 Environmental <br /> Sacramento, CA Protection <br /> 95827-2106 PG&E STOCKTON, PRASE IV GROUNDWATER INVESTIGATION REPORT <br /> APPROVAL <br /> Dear Mr. Doss : <br /> This letter is to acknowledge receipt of your <br /> August 7, 1996 letter "Response to Comments on the Phase <br /> IV Groundwater Investigation Report" submitted to address <br /> the Department of Toxic Substances Control and Regional <br /> Water quality Control Board (Agencies) comment letter <br /> issued July 9, 1996 . A majority of the comments have <br /> been addressed, unfortunately a few comments require <br /> additional information. Comments #1 and #2 below will <br /> require modification to the Phase IV report, Comment #3 <br /> is provided only for clarification. The Department <br /> hereby approves the Phase IV report contingent on the <br /> following being adequately addressed: <br /> 1 . Response to DTSC comment #2 states "as outlined in <br /> Section 5 . 0, the recommendations regarding <br /> ground,vater . . . are to assume a non detect line for <br /> the purpose of preparing the Feasibility Study" . <br /> Section 5 . 0 does not include such a recommendation. <br /> DTSC concurs that an assumed ND line for Zone B <br /> along the perimeter of Area I and II of the Site <br /> would be beneficial to allow preparation of the FS. <br /> The assumed ND line can then be varied once it is <br /> defined and the FS could then be finalized. If this <br /> is the direction PG&E proposes, then it should. be <br /> clearly stated in the recommendations listed in <br /> Section 5 . 0 . How and when the ND line will be <br /> defined is another issue that must be addressed in <br /> Section 5 . 0 . <br /> PA.I.. <br /> 1:\do s0820.wN <br /> %, <br /> RnMan IlrrycN!Pper <br />