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GaeoCa�ua(7ecFtncrs Tru Page 4 <br /> Groundwater Monitoring Report <br /> Project No 724 2 <br /> March 7,2002 <br /> Before a sample was collected, the water level was allowed to recharge to at least 80% of <br /> the initial level All water removed from the monitoring well and not used as a sample was <br /> placed in a 55-gallon DOT (Department of Transportation 17-H) approved container that <br /> was properly labeled and is temporally stored on-site <br /> A dedicated Wattera pump was used to collect each sample <br />' Extreme care was exercised while collecting samples to prevent agitation of the water <br /> contained in the bailer Water samples were transferred into 40-m1 VOA vials preserved <br /> with hydrochloric acid in a manner that minimizes sample aeration during transfer of the <br /> sample All samples were checked for headspace bubbles, labeled, inserted into foam <br /> holders and placed in an ice 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 December 6, 2001, were delivered to Sherwood Labs <br /> of Hilmar, California (certification #1400) for analysis of <br /> • Benzene, Toluene, Ethyl Benzene, and Xylene (BTEX), MTBE by EPA method 602 <br />' 0 Total Petroleum Hydrocarbons as Gasoline (TPH-G) by EPA method 5030/8015(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 laboratory data was submitted electronically to GeoTracker <br />' on December 28, 2001 - confirmation number 7668455481 <br /> 2.0 FINDINGS AND DISCUSSION <br /> The results of the groundwater sample analysis show the following <br /> • Wells MW-1, MW-6 and MW-104 did not contain contaminant concentrations above <br /> the laboratory reporting limits <br /> • Wells MW-2 has trace to low concentrations of the BTEX analytes <br />' • Well MW-3, MW-4 and MW-5 contain low concentrations of TPH-G or BTEX <br /> • Well MW-7 has been non-detect for four consecutive events since its installation in <br /> November 2000 For this event the well contained trace BTEX constituents <br />