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Third Quarter 2005 Groundwater Monitoring and Remediation Status Report Moore Petroleum Bulk Plant,5491 F Street,Banta,California Page 4 November 10, 2003 - An addendum to the workplan was requested in a letter by the SJCEHD to increase the scope of work to further delineate the hydrocarbon plume by installing additional monitoring wells. Technical data on the ozone system and the spacing of the sparge points was also requested. On January 14, 2004, Apex submitted a report titled,Addendum to Workplan for Ozone Sparging. January 14, 2004 - Apex submitted a workplan, titled Workplan for a Limited Subsurface Site Investigation, proposing the installation of five additional groundwater monitoring wells. May 12, 2004 - The SJCEHD responded to the aforementioned Addendum to Workplan for Ozone Sparging, by approving the proposed ozone sparge wells and requesting application for drilling permits. The SJCEHD requested an addendum to the workplan,proposing an additional cone penetration testing (CPT)boring and relocation of the proposed groundwater monitoring well MW-17. August 16, 2004 - The SJCEHD directed in a letter that an addendum be made to the Workplan for a Limited Subsurface Site Investigation, dated January 14, 2004, in order to define the vertical extent of contamination. Apex submitted the report, titled Workplan Addendum Letter for a Limited Subsurface Investigation, dated June 2, 2004, September 2004 - Apex installed and tested an SVE system with activated carbon adsorption as the control device. In addition, Apex installed an ozone generator system for eventual ozone sparging. Results from the SVE startup were reported to San Joaquin Valley Air Pollution Control District (SJVAPCD) in a letter dated November 11, 2005, entitled Source Test Report. December 6-8, 2004 - Apex supervised the drilling of nine ozone sparge wells (OS-2 through OS-10). Results of the ozone well installations are reported by Apex in a document, titled Interim Results Report for Ozone sparge wells dated March 4, 2005. The ozone system began full time operation on February 17, 2005. October 31, 2005 - Apex supervised the installation of four groundwater monitoring wells (MW- 13, MW-14, MW-16 and MW-17). In addition, on November 9, 2005, Apex advanced two cone penetration test borings (CPT-1 and CPT-2). The wells were installed in an attempt to delineate the vertical extent of petroleum hydrocarbons in soil and groundwater at the site and to assess the extent the site is being impacted by upgradient off-site sources. A results report documenting field activities is pending the installation of groundwater monitoring well MW-15.