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Ripon Farm Service Incor[f1!Yr)ated Page 3 932 South Highway 99 East Frontage Road October 18, 2011 Ripon, California 95366 01/20/00 Date of Remedial Action Work Plan submitted by Advanced GeoEnvironmental, Inc. that proposed the design of an SVE/IAS remediation system that included the installation of 6 SVE wells and 12 IAS.; wells, and proposed°that after 12 months of operating the SVE/IAS system, soil confirmation samples would be collected in the area most impacted by petroleum hydrocarbon contamination. The work plan is available on Questys, file XR0005807. 03/10100 Date of Remedial Action Work Plan Addendum submitted by Advanced GeoEnvironmental, Inc. that specified corrective action requirements that included a list of clean-up goals for groundwater using the SVE/IAS system and estimated the volume of soil to be remediatea by the SVE/IAS system to be 645 cubic meters. The addendum is available in the. Unit IV files. 04/10/00 Date of Revised Addendum for Remedial'l Action Work Plan submitted by Advanced GeoEnvironmental, Inc. proposing the advancement of four soil borings to further assess the soil type prior to and in conjunction with the installation of the proposed IAS wells, collection .of soil samples in the source area following twelve months of operating the SVE system to determine the effects of SVE/IAS,. and performance of a drawdown test to assist in determining whether operation of the well at the Jimco Truck .Plaza facility can potentially induce vertical migration of the petroleum hydrocarbon plume toward the Jimco facility well screen. The work plan is.available''in the'.-Unit IV files. 04125-27100 Dates when four IAS wells (IAS1 through IAS4) and 11 SVE wells (VW3A/B, VW4 through VW8, VW9A/B, VW10 and VW11) were installed at the site. 11/27/00 Date when the installation of the SVE system was begun. 12/05/00 Date when the SVE system began operation. 06/08/01 Date of Remediation System Installation and Start-up Report submitted by Advanced GeoEnvironmental, Inc. that described the`installation of four IAS wells and 11 SVE wells, and the installation and start up of the SVE system. 10114-17/03 Dates when soil borings CB-1 through CB-5 were advanced to collect soil and groundwater samples to evaluate the effects of the SVE system in reducing petroleum hydrocarbon contaminant concentra#ions at the site. 01/05/04 Date of Quarterly Report -- Fourth Quarter 2003 submitted by .Advanced GeoEnvironmental, Inc. that documented the advancement of Geoprobe borings CB-1 through CB-5 and presented the soil and groundwater analytical results from the investigation. The report is available on Questys, file XR0005857. 05/14/04 Date of Quarterly Report — First Quarter` 2004 submitted by Advanced GeoEnvironmental, Inc. that documented the.'termirsation of operating the SVE system in January 2004 following a malfunction of.the equipment. The SVE system was not restarted since contaminants of concern were not detected in the soil vapor samples collected during the fourth quarter. 2003 monitoring event. The report is available on Questys,.file XR0005855.