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f <br /> V <br /> Chronology page 2 <br /> 110 N. Filbert Street, Stockton <br /> 01/16/95 Offsite soil borings SB-1 to SB-7 installed. Details in CH2M Hill's Problem <br /> Assessment Report (PAR) and Final Remediation Report (FRP) dated April <br /> 1995. <br /> 01/17/95 Offsite monitoring wells MW-DIS-BS& 8D, onsite MW-DIS-9, and offsite wells <br /> to and MW-DIS-10 installed. Details in CH2M Hill's Problem <br /> 02/08/95 Assessment Report and Final Remediation Plan dated August 3, 1995. <br /> 02/00/95 SVE and IAS systems goes online. <br /> 10/00/95 SVE offline due to rising groundwater levels. <br /> 12/15/95 Wells SVE-3 and SVE-4 installed. <br /> 12/16/99 CPT-1 through CPT-15 installed on and offsite. Details in CH2M Hill's Additional <br /> to Site Characterization Report, dated June 2000 <br /> 03/14/00 <br /> 08/09/01 Additional CPT-16 through CPT-22 and monitoring wells MW-DIS-11 S, -11 D, <br /> to -12, -13, -14S, and -14D installed. Details CH2M Hill's Additional CPT <br /> 12/10/01 Investigation and Monitoring Well Installation Report, dated March 2002. <br /> 06/05/02 Date of EHD correspondence commenting on ozone sparging work plan and <br /> approves pilot test. <br /> 11/25/02 Date of Kleinfelder's Pilot Test Letter Report concluding ozone sparging offsite <br /> would effectively mitigate 1,2-DCA impact to groundwater. <br /> 02/10/03 Offsite MW-DIS-15 installed to monitor effects of ozone on groundwater. Details <br /> in Kleinfelders's Groundwater Monitoring Well Installation report dated April 2, <br /> 2003. <br /> 05/00/03 New SVE system goes online onsite. Later in 2003, offsite ozone sparge system <br /> goes online. <br /> 09/00/03 Ozone sparging system goes online. <br /> 09/01/06 Monitoring wells MW-DIS -4, MW-DIS-S, MW-DIS-6, MW-DIS-7S &7D destroyed <br /> to under EHD approval and permit. Historical data indicates no need for wells and <br /> 06/04/08 changes in property usage requires wells to be removed. <br /> 02/25/08 Date of EHD correspondence approving 'rebound' testing for SVE/IAS and ozone <br /> sparge system. <br /> 03/24/08 Date of State Water Resources Control Board (SWRCB) Clean Up Fund (CUF) <br /> 5-year review letter recommending site closure. <br />