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3/123/93 PHSIEHD letter stating the gradient is divergent, seasonal high <br /> groundwater level is 15 feet and current groundwater levet is 33 <br /> feet below grade so the contaminated soil should be remediated <br /> before groundwater level rises again and to submit a remediation <br /> plan. <br /> 3126193 Corrective Action Plan proposing vapor extraction submitted. <br /> 518193 PHSIEHD letter requesting cleanup levels be non detect and that <br /> when the addendum with these levels is submitted public <br /> notification will be conducted. <br /> 5126194 PHSIEHD conducted public notification. i <br /> 10/20/94 Central Valley Regional Water Quality Control Board General Order <br /> for Land Disposal of Ground Water allowing extracted water from <br /> monitoring wells to be disposed into injection wells. <br /> 12/15/94 Two reinjection wells installed. Both wells screened from 13 to 42 <br /> feet below grade. <br /> I <br /> 1117195 Start up of vapor extraction phase of remediation. <br /> 1123195 Groundwater extraction phase of remediation added. <br /> 3115195 EMCON report on Spray Aeration and Vacuum Extraction (SAVE) <br /> system. <br /> 7/95 APEX tools over as consultant for the site. <br /> I <br /> 1114195 PHS/EHD letter stating BTEX and TPH-g non detect in all wells for <br /> the first time, EDC still being evidenced, so continue to operate the <br /> SAVE remediation system. <br /> 318/96 PHSIEHD letter stating the on site water supply well was sampled <br /> and the results were .6 ug/L for EDC so the well should be sampled <br /> again. <br /> 7/15/96 PHS/EHD letter stating the results from sample from water supply <br /> well on site again show EDC present. <br /> 11/27/96 PHS/EHD letter concurring with the consultants recommendation <br /> that the remediation system should be shut off and post quarterly <br /> monitoring of the wells should occur. <br />