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z Chronology r 1 <br /> Page 4 <br /> 595 E. 11`h Street, Tracy 1 <br /> 05/1-2/07 Five (5) soil vapor probes were placed on site around the mobile homes <br /> j and vapor samples were collected at this time. <br /> 1 12/21/07 The date of the EHD letter commenting on Wright Environmental's E <br /> Results of Soil Vapor Sampling dated June 4, 2007, and requesting <br /> preparation of a No Further Action Required (NFAR) report. <br /> 03/20/08 The date the EHD receives Wright Environmental's No Further Action <br /> Summary Report for Case Closure dated March 4, 2008. <br /> i 07/10/08 The date of the EHD letter commenting on Wright Environmental's No <br /> Further Action Summary Report for Case Closure that requires additional <br /> soil data to update the ten year old data for residual mass calculations. <br /> i <br /> 09/15/08 ;On this date at the request of the responsible parties a meeting was held <br /> ,with the EHD, the responsible parties, and the Regional Board in <br /> attendance. It was agreed that soil and ground water samples would be <br /> collected near MW2 and MW6 for current data. <br /> 12/12/08 Hydropunch borings were advanced, HP1 near MW2 and HP2 thru HP4 <br /> near MW6, on this date. `I <br /> 03/20/09 The date the EHD receives Wright Environmental's NFAR Addendum, i <br /> Ground Water Sampling and Up/Gradient Source Report dated March 9, <br /> 2009, that contains ground water and soil data from HPI thru HP4 <br /> performed in December 2008. <br /> i <br />