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CHRONOLOGY.- <br /> 532 <br /> HRONOLOGY.-532 E. LOCKEFORD STREET, LODI <br /> 7116193 A 550 gallon UST was removed. A soil sample was collected <br /> beneath the tank at 8.5 feet below surface grade. There,was odor <br /> to the soil. Laboratory analysis of the soil sample confirmed <br /> gasoline contamination. <br /> 4/24/97 PHS/EHD directive to submit a work plan to define the.extent of the <br /> contamination. <br /> 615197 PHSIEHD received a work plan.for a soil boring to be converted to <br /> a monitoring well if necessary: <br /> 8122197 Monitoring well installed in the former UST location. <br /> 10/16/97 PHSIEHD received results of soil and groundwater samples <br /> collected during and after installation of the monitoring well. .Soil <br /> contamination evidenced in clay soil from 20 to 30 feet below <br /> grade. Low level contamination in sand at 35 feet below grade. <br /> Non detect in soil from 40 to 55 feet below grade. Groundwater at <br /> about 46 feet below grade. Low levels of BTEX & TPH-g'detected <br /> in the groundwater. Non detect for oxygenates in soil and <br /> groundwater. <br /> 1127198 Water sample collected from monitoring well. <br /> 2123198 PHS/EHD received report of results of water samples collected <br /> from the monitoring well. Fine particles in first water sample <br /> collected so a second sample.was collected, both to be analyzed. <br /> Low levels of BTEX detected in the groundwater. Non detect for <br /> TPH-g and oxygenates_ Consultant recommends closure. <br /> 514198 PHSIEHD concurs that site is low risk and should be closed <br /> t <br />