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CHRONOLOGY <br /> page 3 <br /> 2421 Holy Dr„ Tracy j <br /> 06/05/011 "Addendum to Closure Summary Report" received May 4, 2001 reviewed. I�I <br /> Most concerns adequately handled. Still missing are groundwater plume 4 <br /> delineation, quarterly monitoring, vertical soil delineation, and sensitive <br /> receptor survey. <br /> 06111101PHS-EHD comments on "Addendum to Closure Summary Request" and ' <br /> requires additional groundwater monitoring well sampling event and lists <br /> exact analytes and methods and detection limits. Results to be evaluated <br /> prior to granting the request for NFA. <br /> 07/13/01 PHS-EHD onsite for groundwater monitoring well sampling event. <br /> DTW/MW-1=6.71' bgs. <br /> 08/27/01 PHS-EHD reviews ATC's "Third Quarter 2001 Groundwater Monitoring <br /> Report" dated August 21, 2001 received August 22, 2001. Only MW-2 <br /> reports any petroleum after full suite of tests performed. TPHg @ 270 µgll <br /> and Benzene @ 1.3 µg11 only detections in MW-2. PHS-EHD evaluates <br /> site as qualified for NFA. Site placed on list to be discussed with <br /> CVRWQCB at LOP meeting. <br /> 09/26/01 Site discussed with CVRWQCB. Marty Hartzel concurrs with NFA <br /> evaluation. <br /> 10/24/01 Site closure activities begin. <br /> 11/28/01 Closure papers submitted. <br /> i <br />