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GealogicalTecknuslfc Page 4 <br /> Gs oundwater Monitoring Report <br /> Pioject No 724 2 <br /> November 17, 2003 <br /> 1 conductivity, and pH) had stabilized (Appendix C) This indicated that water representative <br /> of actual aquifer conditions was entering the well Groundwater parameter stabilization was <br /> characterized by three successive readings within 10% variance <br /> Before a sample was collected, the water level was allowed to recharge to at least 80% of <br /> the initial level All purge water removed from the monitoring well was placed in a <br /> properly labeled 55-gallon DOT (Department of Transportation t7-H) approved container <br /> ' and is temporarily stored on-site <br /> A dedicated Wattera pump was used to collect each sample <br /> ' Water samples were transferred in a manner that minimizes sample aeration during transfer <br /> of the sample into 40-ml VOA vials preserved with hydrochloric acid All samples were <br /> checked for headspace bubbles, labeled, inserted into foam holders and placed into an ice <br /> chest cooled to 4°C for transport to the laboratory <br /> ' The sampling technician, while collecting all samples, wore disposable gloves <br /> A chain of custody document, listing all samples collected and their intended analyses, <br /> accompanied the samples from field to the laboratory, thereby providing a means to track <br /> their movement and ensure their integrity <br /> 1.3 Laboratory Analyses <br /> The groundwater samples collected on September 26, 2003, were delivered to Sherwood <br />' Labs of Hilmar, California(certification #1400) for analyses of <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX), MTBE by EPA method 8020 <br />' • Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 8015(M) <br /> The detection limits for the above analyses are listed in Table 4 of Appendix A, while the <br /> lab analytical results are presented in Appendix B <br /> As required under AB2886, the groundwater elevation and laboratory data were submitted <br />' electronically to GeoTracker on October 29 and November 12, 2003 - confirmation <br /> numbers 9254504680 and 2219959855 <br /> 2.0 FINDINGS AND DISCUSSION <br /> iThe results of the groundwater sample analysis indicate the following <br /> • Well MW-1 contain petioleum hydrocarbon contaminants for the first time since <br /> September 2000 <br />