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Ripon Farm Service Incorpated Page 4 <br /> 932 South Highway 99 East Frontage Road October 18, 2011 <br /> Ripon, California 95366 <br /> 10/05/04 Date when the SVE system was restarted for a SVE rebound-response test. <br /> 11/01/04 Date of Additional Site Assessment Work Plan submitted by Advanced <br /> GeoEnvironmental, Inc. proposing the installation of three monitoring wells, two <br /> in the City of Ripon right-of-way, and one on-'site. The work plan is available in <br /> the Unit IV files. <br /> P <br /> 12/16/04 Date of Quarterly Report — Fourth Quarter 2004 submitted by Advanced <br /> GeoEnvironmental, Inc. that reported non-detect results for air samples collected <br /> during the SVE rebound-response test. The report'is available on Questys, file <br /> XR0005852. <br /> 04/15/05 Date when monitoring wells. MW-9 and MW-10 were installed in the Frontage <br /> Road to delineate the petroleum hydrocarbon plume. <br /> s <br /> 06/08/05 Date of Quarterly Report — Second Quarter 2005 submitted by Advanced <br /> GeoEnvironmental, Inc. that described the installation of MW-9 and MW-10 in the <br /> City of Ripon right-of-way. The report is available on GeoTracker. <br /> 08104/06 . Date of Additional Off-site Assessment Work Plan submitted by Advanced <br /> GeoEnvironmental, Inc. proposing the advancement of three soil borings in the <br /> City of Ripon right-of-way west of Highway 99, 'near municipal well #12, to assess <br /> the presence. of petroleum hydrocarbon constituents down-gradient of the site. <br /> The work plan is available on GeoTracker. <br /> 08/15/06 Date that ownership of monitoring wells MW-6,° MW-7 and MW-8 was transferred <br /> from Ripon Farm Service, Inc. to Olympian.JV. <br /> 08/16/07 Date when four soil borings, B20 through B23were advanced west of Highway <br /> 99 to total depths of approximately 30 feet bsg.� . <br /> 11/30/07 Date of Quarterly Report — Third Quarter. 2007 submitted by Advanced <br /> GeoEnvironmental, Inc. that reported non-detect results for grab, groundwater <br /> samples collected during the advancement of soil borings B20 through B23. The <br /> E report is available on GeoTracker. <br /> 07/18/08 Date of Soil Vapor Assessment Work .i Plan ' submitted by Advanced <br /> GeoEnvironmental, Inc. proposing the advancement: of three soil borings to <br /> collect soil gas samples to evaluate the potential for.' intrusion into existing <br /> onsite buildings from hydrocarbon-impacted soil. Advanced GeoEnvironmental, <br /> Inc. proposed analyzing total petroleum hydrocarbon as gasoline (TPH-g) by <br /> method TO-3, total petroleum hydrocarbons asa'diesel (TPH-d) by method TO-17, <br /> and volatile organic constituents by method TO-15 or method 8260B. The work <br /> plan is available on GeoTracker. <br /> .I <br /> 03/11/09 Date when three soil borings, VP-1 through".VP-3,,were advanced on-site to <br /> approximately 5.5 feet bsg to collect soil gas samples. <br /> 06/22/09 Date of Vapor Intrusion Investigation Report submitted by Advanced <br /> GeoEnvironmental, Inc. that reported TPH'g at ;concentrations of 71,000 <br /> micrograms per cubic meter (pg/m3), 64,000 pg/m3, and 54,000 pg/m3 by method <br />