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Chapin Brothers Page 6 <br /> 1766 Monte Diablo May 21, 2009 <br /> Stockton, CA <br /> extraction system back on and installing additional extraction wells, the EHD <br /> responded in a letter this date that they agreed with turning the ground water <br /> extraction system back on and requested justification for the additional extraction <br /> wells. <br /> 02/23/07 The date of the EHD letter approving installation of additional ground water <br /> extraction wells and expressing concern that additional site assessment, <br /> especially vapor intrusion, was not included in the work plan. <br /> 03/14-15/07 Ground water extraction wells EW4 through EW6 were installed on these dates. <br /> 06/04/07 The date of Quarterly Report- First Quarter 2007 that discusses the March 2007 <br /> installation of extraction wells and recommends restarting operation of the <br /> ground water extraction system. <br /> 09/10/07 The date of the EHD letter approving the ground water extraction work plan to <br /> restart the ground water extraction system. <br /> 09/24/07 The ground water extraction system was put back into operation on this date. <br /> 11/25/08 The date of the EHD letter that they had been notified that the ground water <br /> extraction system had been shut down without approval and directed that <br /> operation of the system was to resume within 14 days. <br /> 12/11/08 The operation of the ground water extraction system was resumed on this date. <br /> 02/17//09 The date of a second petition by Russell Chapin for closure of the site. This time <br /> it was sent to the Governor of California. <br /> 02/27/09 The date of a request from Advanced GeoEnvironmental Inc. (Chapin's <br /> consultant) for suspension of corrective action at the site and notification that the <br /> ground water extraction system would be turned off on 2/28/09. <br /> 03/19/09 The date of the EHD response to Ron Duff, the Cleanup Fund Manager, <br /> regarding the petition for closure of the site. <br /> 04/20/09 The date of the SWRCB letter requesting the EHD to respond to the petition for <br /> closure. <br /> 04/27/09 The date of the EHD letter to Chapin Brothers informing them that the ground <br /> water extraction system had been shut down for the second time without EHD <br /> approval so the case would be referred to the CVRWQCB for enforcement <br /> action. <br /> 05/17/09 The date of the EHD letter to the SWRCB providing information as to why the site <br /> should not be closed. <br />