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. I <br /> CHRONOLOGY <br /> 10842 S.HARLAN ROAD,LATHROP <br /> APN: 19333028 <br /> LOP CODE: 0001685 <br /> 12/15/04 On this date EHD issued a permit for a self-directed investigation associated with I <br /> a lease of the property. GeoProbe soil and groundwater samples were collected <br /> for analysis. <br /> 12/20/04 An EHD inspection was performed on this date to observe the groutine of the <br /> GeoProbes. <br /> 01/11/05 Date on MB Environmental report of findings for work performed in December <br /> 2004. Soil and groundwater sample results were positive for TPH-diesel <br /> although the lab noted the chromatogram did not match the typical pattern for <br /> diesel. <br /> 05/09/05 The date EHD filed a Notification of Hazardous Waste Discharge and an <br /> Unauthorized Release Report. <br /> 05/23/05 Date of EHD letter to the responsible parties recommending additional <br /> investigation to confirm positive sample results evidenced during self-directed <br /> environmental site assessment. <br /> 01/31/06 The site was placed in the Local Oversight Program on this date. <br /> 04/06/06 On this date a permit was issued for additional investigation including three on- <br /> site monitoring wells. The work plan had been approved on 3/28/06. <br /> 09/5-6/06 Installation of three on-site monitoring wells occurred on these dates. <br /> i <br /> I <br /> 09/18/06 On this date the first groundwater samples were collected for analysis. The <br /> sample results were non-detect. <br /> I <br /> 10/27/06 A second round of groundwater sampling was conducted on this date. The <br /> results were non-detect and confirmed the first sample results. <br /> 02/21/07 On this date after reviewing"The Subsurface Investigation Summary Report" <br /> dated January S. 2007, which recommended site closure, prepared by-the <br /> consultant, Lee and Pierce,EHD staff discussed our concurrence with the closure <br /> request with the Central Valley Regional Water Quality Control Board staff. <br />