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via u <br /> Fourth Quarter 2005 Groundwater Momtonng Report <br /> Eckert Cold Storage,Manteca,Califonua <br /> February 27,2006 <br /> Page 2 <br /> Summary of January 5, 2006 Quarterly Groundwater MonitoringEvent <br /> rNumber <br /> Activi <br /> r of monitonn wells $ Number of monitonn wells sampled <br /> of monitoring wells measured for 8 4 <br /> evelDate monitored 01/OS/06 Hydrology <br /> Average depth to groundwater below 16 30 ft Increase(+)/decrease(_)in average depth to -2 60 h <br /> monitonn well measunn rots oundwater since last monitonn event <br /> Approximate oundwater flow direction Northwest shallower <br /> Groundwater Contamination <br /> Wells contam►n free roduct 0 Wells with etroleum h drocarbon odors noted 2 <br /> Nature of contamination Gasoline <br /> Range in concentrations <br /> Constituents Benzene(gg/L) <0 5—20 <br /> TPH-G(mg/L) <0 05—0 25 <br /> MTBE(µg/L) <0 5—13 <br /> 1,2-DCA(pg/L) <0 5—15 <br /> TBA(µg/L) <5 0—31 <br /> FIELD OBSERVATIONS <br /> On January 5, 2006, a Condor representative made field observations at four of the eight Site monitoring <br /> wells (MW-4, MW-5, MW-7, and MW-8) Field observations included sample odor, appearance (color, <br /> clarity, and presence of petroleum product sheen or phase in samples), and water duality field parameters <br /> No sheen was noted in the inspection sample collected from the wells, but a moderate hydrocarbon odor <br /> . was noted in the inspection samples collected from MW-5 and MW-8 <br /> GROUNDWATER ELEVATIONS <br /> The eight Site monitoring wells were measured for depth to water during this annual monitoring event <br /> The average groundwater elevation on January 5, 2006, was approximately 2 60 feet higher than the <br /> point <br /> previous sampling event conducted on September 22, 2005 The three- solution for the Site <br /> groundwater gradient on January 5, 2006, utilizing monitoring wells MW-3, pointMW- shown <br /> and MW-6, is sho <br /> in Figure 3, Attachment A, and indicates that the groundwater gradient was approximately 0 0029 wn <br /> or the January 5, 2006 monitoring event are presented <br /> toward the northwest Groundwater elevation data f <br /> in Table 1, on the next page, and are also shown in Figure 3, Attachment A <br /> to <br /> CONDOR <br />