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Chapin Brothers Page 5 <br /> 1766 Monte Diablo May 21, 2009 <br /> Stockton, CA <br /> 11/21/03 Four slant borings CB6 through CB9 were performed this date. <br /> 12/01/03 Slant boring CB 10 was performed this date. <br /> 12/26/03 The date of Russell Chapin's letters to Assemblywoman Barbara Matthews and <br /> the San Joaquin County Board of Supervisors that ask for closure of his site. <br /> 12/29/03 The date of Additional Site Assessment Report— December 2003 that discusses <br /> the November and December 2003 work. <br /> 02/19/04 The date of the State Water Resources Control Board (SWRCB) letter to Russell <br /> Chapin telling him to appeal to their agency if his closure request is denied. <br /> 04/27/04 The date the EHD mailed a letter to Chapin Brothers that commented on the <br /> 12/29/03 report that recommends further remediation and states further <br /> comments will be made after a new consultant submits their report. <br /> 08/10/04 The date of ATC consultants closure report for the site. <br /> 10/04/04 The date of the EHD letter not concurring with closure of the site and requiring <br /> continued ground water remediation. <br /> 11/23/04 The date of Chapin Brothers petition to the SWRCB for closure of the site. <br /> 01/07/05 The date of the SWRCB letter to Russell Chapin that during review of the petition <br /> monitoring and reporting for the site must continue. <br /> 01/25/05 The date of the EHD response to the SWRCB on Chapin Brothers petition for <br /> closure of the site. <br /> 02/16/05 The EHD and the SWRCB discussed the site on this date. <br /> 02/17/05 The date of the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) response to the SWRCB on Chapin Brothers petition for closure of <br /> the site. <br /> 03/03/05 The date of the EHD letter informing Russell Chapin that it is their understanding <br /> that SWRCB doesn't concur with closure of the site and recommends turning off <br /> the ground water extraction system and submitting a work plan to monitor the <br /> plume behavior under natural conditions. <br /> 04/18/05 The date of the EHD letter approving Ground Water Monitoring — Natural <br /> Attenuation Work Plan. <br /> 05/10/05 The ground water extraction system was shut down on this date. <br /> 10/19/06 After meeting with Russell Chapin on 5/31/06 and reviewing first and second <br /> quarter monitoring reports for 2006 that recommended turning the ground water <br />