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1 <br />' Quarterly Report - Fourth Quarter 2005 <br /> . NATIONAL FREIGHT <br />' 2850 Loomis Road, Stockton, California <br />' 1.0. INTRODUCTION <br /> At the request of Mr Daniel Folcher of Vineland Construction Co ,Advanced GeoEnvironmental, <br />' Inc (AGE) has prepared this report of environmental activities conducted at 2850 Loomis Road, <br /> Stockton,California(site) The scope of work included the monitoring and sampling of four ground <br /> water monitoring wells, analysis of the ground water samples, and preparation of this report The <br /> location of the site and surrounding area are illustrated on Figure 1 On-site structures and the <br /> locations of monitoring wells are illustrated on Figure 2 <br />' Site background information can be found in the AGE-prepared Preliminary Investigation and <br /> Evaluation Report, dated 12 October 1999, and Additional Site Assessment Report, dated 09 April <br />' 2002 <br />' 2.0. PROCEDURES <br /> Field procedures were performed in accordance with Central Valley Regional Water Quality Control <br />' •� Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites and <br /> San Joaquin County Environmental Health Department(EHD)guidelines for the sampling of ground <br /> water monitoring wells The procedures were performed in accordance with the AGE-prepared and <br />' EHD-approved Monitoring Well Installation Work Plan, dated 09 June 2000 <br />' 2 1 WELL MONITORING AND PURGING <br /> On 07 December 2005, the depth to ground water in monitoring wells MW-1 and MW-3 through <br />' MW-5 was measured from the top of each well casing to the nearest 0 01-foot utilizing a Solinst <br /> water level meter Monitoring well MW-2 was covered by cargo and was inaccessible this quarter <br /> The ground water elevation in each well was calculated by subtracting the measured depth to ground <br />' water from the surveyed casing elevation (Table 1) <br /> i <br />' After water levels were measured,4 to b gallons of water(a minimum of three casing water volumes <br /> per well) were purged from the three wells using a Waterra Hydro-Lift Il pump equipped with a <br /> mechanical arm utilized to surge each well with dedicated tubing,while monitoring well MW-5 was <br /> purgeiand later sampled with a disposable bailer Ground water temperature, pH, and conductivity <br />' - - were measured at regular intervals during purging using an Oakton water analyzer Field sheets and - <br /> data are included in Appendix A Purged water was stored on-site in properly labeled, Department <br />' of Transportation(DOT)-approved 55-gallon drums pending proper disposal <br />' Advanced GeoEnvironmentai,Inc <br /> 1 <br />