Laserfiche WebLink
I` 110 Sonora, Stockton, chronology <br /> Page 5 <br /> �r 02/07/05 Installation of ozone sparge well OZ1 (screened 30 —32 feet) <br /> occurred this date. <br /> 02/25/05 Date of Site Conceptual Model. <br /> 04/13/05 Date of First Quarter 2005 Report that contains information on <br /> I installation of ozone well in February 2005. <br /> 07/14/05 Geoprobe.boring B18 drilled inside fire station building northeast of <br /> USTs. 2 and 5 this date.' Total depth was 35.feet. <br /> 10/06/05 Date of Third Quarter.2005 Report that contains information.on <br /> 1318. Soil.-and water samples were non detect. <br /> 12105 Ozone. system turned off. <br /> 1 <br /> 01/27/06 EHD meeting with.City.of Stockton at which it was agreed there <br /> 3 would be two more quarters of monitoring for post remediation <br /> ' monitoring evaluation. <br /> 1 09/19/06 Geoprobe borings CB1, CB2, CB3 and CB4 were advanced to 30. <br /> { feet and soil samples collected to evaluate effectiveness of the <br /> vapor extraction and.investigate the extent of any remaining. soil <br /> contamination.` <br /> 12/12/06 Date of Closure Summary. Report that includes work performed in <br /> J September 2006. The only soil contamination found was in C133 <br /> that was placed in the former Tank,1 location. ..The soil <br /> contamination found was at 25 feet which is the first interface.with <br /> ground.water and 30 feet which is below ground water. <br /> s <br /> t . <br />