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' Quarterly Report - Third Quarter 2005 • RIPON FARM SERVICE South Highway 99,Ripon, California ' 1.0, INTRODUCTION At the request of Mr. Allan Fetters,Advanced GeoEnvironmental, Inc. (AGE) has prepared this ' report of environmental activities conducted at1 South Highway 99, Ripon, California(the site), The location of the site and surrounding are a� illustrated on Figure 1. Structures, monitoring wells and remediation well locations associated with the site are depicted on Figure 2. The report procedures and analytical results from the quarterly ground water monitoring event performed on 17 August 2005; a total of ten ground Water monitoring wells were monitored and sampled. Background information, including details of previous site assessment work, is rpresented in Appendix A. ' 2.0. PROCEDURES The monitoring well installation was performed in accordance with Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of underground storage tank(UST) sites and in accordance with procedures outlined in the AGE prepared work plan Additional Site Assessment Work Plan dated 01 November 2004 and approved by the San 1 • Joaquin County Environmental Health Department (EHD)be letter dated 13 January 2005. Ground water monitoring and sampling were performed in accordance with EHD guidelines for ' the sampling of ground water monitoring wells. Quarterly ground water monitoring activities were conducted on 17 August 2005; monitoring wells MW-1 through MW-10 were monitored and sampled. 2.1. WELL MONITORING AND EVACUATION ' r level meter was used to measure the depth to A Solmst Ovate round water in monitoring wells ground MW-1 through MW-10 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, disposable plastic bailers were used to purge the wells ' of standing water. Approximately 2.25 to 5 gallons of water (a minimum of three casing water volumes per well) were removed from wells MW-1 through MW-10. Ground water temperature, pH, and conductivity were measured at regular intervals during purging using an Oakton water analyzer. Purged ground water was containerized in properly labeled, DOT-approved 55-gallon, drums and stored on-site. Field sheets and data are included in Appendix B. 1 , rAdvanced GeoEnvironmental,Inc.