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Quarterly Report - First Quarter 2006 RIPON FARM SERVICE INC. 22871 South Highway 99,Ripon, California 1.0. INTRODUCTION At the request of Mr Allan Fetters (Ripon Farm Service Inc ),Advanced GeoEnvironmental, Inc (AGE)has prepared this report of environmental activities conducted at 22871 South Highway 99, Ripon, California(the site) The location of the site and surrounding area are illustrated on Figure 1 Structures,monitoring wells and remediation well locations associated with the site are depicted on Figure 2 The report documents the analytical results from ground water samples collected on 17 October 2005 The Central Valley Regional Water Quality Control Board(CVRWQCB)directed by letter dated 16 July 2004 that Ripon Farm Service (RFS) should characterize the quality of ground water, as well as ground water flow direction and gradient,at the RFS facility The scope of work was to determine if activities at the RFS facility have contributed to possible high nitrate concentrations in local ground water The work was also performed in accordance with procedures approved in the AGE- prepared Monitoring Well Installation Work Plan, dated 30 August 2004 and approved by the CVRWQCB by letter dated 22 October 2004 Background information,including details of previous site assessment work, is presented in Appendix A This report is prepared in accordance with CVRWQCB guidelines by a Professional Geologist as defined in Chapter 12 5 Article 4, Section 7850 of the Business and Professions Code 2.0. PROCEDURES The monitoring and sampling of ground water monitoring wells were performed in accordance with CVRWQCB guidelines Quarterly ground water monitoring activities were conducted on 10 January 2006, monitoring wells MW-101 through MW-104 were monitored and sampled '�rYn&J�_ 2 1 WELL MONITORING AND EVACUATION On 10 January 2006, a Solinst water level meter was used to measure the depth to ground water in monitoring wells MW-101 through MW-104 relative to the tops of the well casings,prior to any well purging The ground water elevations and gradient were determined from these data (Table 1) After recording water level measurements,an inertia pump and dedicated tubing were used to purge the wells of standing water Approximately 6 to 8 gallons of water(a minimum of three casing water volumes per well) were removed from wells MW-101 through MW-104 j ✓iI Wl;- • Ground water temperature,pH,and conductivity were measured at regular intervals during purging Advaneed GeoEnvironmental,Inc