ARCHIVED REPORTS_XR0005852 - Laserfiche WebLink

Home Browse Search

Quarterly Report - Fourth Quarter 2004 ; RIPON FARM SERVICE ' 22871 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 at 22871 South Highway 99, Ripon, California (the site). The location of the site and its surroundings are illustrated on Figure 1. Structures,monitoring well and remediation well locations associated with the site are depicted on Figure 2. This report documents the performance of the quarterly ground water monitoring event on 21 October 2004, and performance of a soil-vapor extraction rebound-response test. Background ' information, including details of previous site assessment work, is presented in Appendix A. ' 2.0. PROCEDURES , ' Quarterly ground water monitoring activities were conducted on 21 October 2004;monitoring wells MW-1 through MW-5 were monitored and sampled. In addition, a soil-vapor extraction (SVE) rebound-response test was performed at the site in October 2004. ' • All field work was performed in accordance with Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites. ' Ground water monitoring and sampling was performed in accordance with San Joaquin County Environmental Health Department (EHD) guidelines for the sampling of ground water monitoring wells. 2.1. WELL MONITORING AND EVACUATION ' 'A Solinst water level meter was used to measure the depth to ground water in on-site wells MW-1 p - through MW-5 relative to the tops of the well casings. The total depth of each well was also ' measured, after sediment was removed from the well casing. 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 3 to 4 gallons of water(a minimum of 3 casing water-volumes per , ' well)were removed from wells MW-1 and MW-3 through MW-5;well MW-2 was purged near-dry after 2 gallon of water was removed.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 Department of Transportation (DOT)-approved 55-gallon drums and was stored on-site. Field sheets and data are included in Appendix B. ' Advanced GeoEnvironmeotal,Idc.