Laserfiche WebLink
1 110 Sonora, Stockton, chronology <br /> "L <br /> Page 3 <br /> 11/23/98 Vapor extraction test using VW1 conducted this date. <br /> 11/24/98 Air sparge test'using VWSd (submerged vapor well) conducted and <br /> during the test it was determined that VW2s was leaking air and <br /> { probably had a'cracked well seal. <br /> 02/17/99 VW2s was destroyed by pressure grouting.this date. <br /> 04/22/99 An air sparge test was attempted using. M\/V1 and a vapor <br /> extraction test using VW 1 was conducted this date. <br /> 06/30/99 An air sparge test was conducted using. MW 1 this date. <br /> 01/13/00 Date of,Air SpargelVapor Extraction Pilot Test Results and <br /> Feasibility Study details work and tests conducted in November <br /> 1998 and in 1999 and recommends air sparge/vapor extraction for <br /> remediating the site. <br /> 04/02/00 Date of Final Remediation Plan For Soil-and Groundwater <br /> Remediation. <br /> 06/19/00 Date of EHD letter'requesting design plans for remediation system. <br /> 10/05/00 Date of Design Plans for remediation system. <br /> i - <br /> 01/03/01 Date.of'EHD letter approving.with conditions design plans for <br /> remediation system. <br /> 7124-25/01 Installation of air sparge wells IAS1, IAS2 and IAS3 (screened 35-- <br /> 40 <br /> 5 — <br /> 40 feet) and.vapor wells VW6, VW7 and VW8 (screened 15 —40 <br /> feet) occurred. ; No soil samples were collected for analysis and no <br /> PID or OVM readings taken during drilling. <br /> 10/11/01 Operation of the soil vapor extraction and air sparge system began <br /> this date. <br /> 12/20/01 Date of-Remediation:System Installation and Fourth Quarter report <br /> covering work in July 2001 and remediation system start up. <br /> 04/10/02 Piping from a previously removed UST located in the south part of <br /> j the property used for fuel dispersion to the burn areas was <br /> removed this date (fire fighting training area). Soil contamination <br /> { <br /> :s <br />