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December 1986, which initiated the permanent removal of both US-I s The <br /> two diesel-fuel US hs were removed in September 1989 <br /> In July and September 1987, Environmental Science & Engineering (ESE) <br /> installed three groundwater monitoring wells (MW-1 through MW-3) In <br /> January 1988, Anderson Consulting Group (ACG) installed wells MW-4 and <br /> MW-5 ACG subsequently drilled soil borings 90-1 and 90-2 and installed <br /> wells MW-6 and MW-7 in February 1990 and MW-8 in September 1990 PSC <br /> (formerly Burlington Environmental) installed wells MW-9 through MW-13 <br /> in March 1994 and piezometers PZ-1 and PZ-2 and air sparging well SP-1 in <br /> September 1994 <br /> PSCP erformed a soil venting and air sparging pilot test in October and <br /> November of 1994 to evaluate the effectiveness of this remediation <br /> technology Soil venting tests were performed using well MW-1, and air <br /> sparging tests were performed using well SP-1 Results of the tests, contained <br /> in PSC's February 1, 1995 Final Remediation Plan, indicated that soil venting <br /> and air sparging would be effective in remediating hydrocarbon impact <br /> In June 1995, PSC proceeded with the installation of air sparging wells SP-2 <br /> through SP-6 However, implementation of the sparge and vent remediation <br /> was postponed due to petroleum hydrocarbon concentration reductions that <br /> were observed at the time to be naturally occurring at the site <br /> In May 1999, PSC performed a subsurface investigation using cone <br /> penetrometer (CPT) technology Three CPT borings (CPT-1 through CPT-3) <br /> were driven, and soil and groundwater samples were collected for analysis <br /> This CPT investigation indicated that the lateral extent of impacted <br /> groundwater is Iargely contained within the Earthgralns property boundaries <br /> Results from this investigation were reported in PSC's May 1999 Subsurface <br /> Investigation and Groundwater Monitoring Report <br /> An additional air sparging and soil venting pilot test was performed in lune <br /> 2000 using VW-1 as the vent well This test was conducted in general <br /> accordance with procedures described in PSC's May 15, 2000 Pilot Testing <br /> Work Plan Once again, pilot test results Indicated that this technology would <br /> be an effective method of treating petroleum hydrocarbon impact at the site <br /> Test results and designs for an air sparging and soil venting remediation <br /> system are contained in PSC's August 31, 2000 Remedial Action Work Plan <br /> Operation of a full scale air sparging and soil venting remediation system was <br /> initiated on April 25, 2001 Installation of a new air sparging well (SP-A) was <br /> performed on March 14 2002 <br /> NOV6Flnbu 2602 Groundwater Monitoring And RUnedmoon Status Report <br /> I he Fartharains Baking Compan} <br /> 2651 South Airport Way-Stockton CAILIOMM <br /> Prepared for I IIF I XR Ili( KAINS B%LING COMPANl Pref)rr,-d by Ph3hp SLrVICCS Corp <br /> 11 u Nw624201 2u zi,sn cti4incKton\4iockion\1 102moo doc Dc.u.mbu 9 2002 <br />