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r , <br /> Pombo Ranch Property <br /> First Quarter Groundwater Sampling Report January 2005 <br /> Page: 3 <br /> CONCLUSIONS AND RECOMMENDATIONS <br /> Shallow ground water flow was to the northeast and southwest with very flat gradients. <br /> Low concentrations of gasoline petroleum hydrocarbons and volatile aromatic <br /> hydrocarbons were detected by the analytical laboratory in water samples collected from <br /> the monitoring wells MW4 and MW5 located at and immediate down gradient from the <br /> former underground storage tanks. Low concentrations of fuel oxygenates were detected <br /> in the water sample collected from the monitoring well MW4 located at and immediate <br /> down gradient from the former underground storage tanks. The contamination is defined <br /> laterally and vertically. The dissolved oxygen low in the vicinity and down gradient of the <br /> release indicates that the biological breakdown of the groundwater contamination is <br /> occurring. The San Joaquin County [ Environmental Health Division modified and <br /> approved on November 3, 2004, the M.J. Kloberdanz work plan for the over excavation <br /> and removal of impacted soils in the source area. Quarterly monitoring will continue to <br /> confirm the breakdown of the remaining contaminants. <br /> I <br /> i <br />