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I i CHRONOLOGY CAL TRANS - LODI MAINTENANCE STATION 845 PINE STREET LODI, CA 95240 . APN 049-050-30 11/30/89 One 1000 gallon unleaded gasoline UST and one 1000 gallon diesel UST removed this date. Soil clinging to unleaded tank had hydrocarbon odor. Slab encountered under tanks, no soil samples collected this date. 12/01/89 Soil samples collected this date from under the piping. Analytical results all non-detect, except for 92-mg/kg kerosene at piping #3. 02/06/90 Unauthorized Release Form #90-U58 and Prop 65#90-136 filled out this date. 05/02/90 Soil samples collected this date from under the concrete slab. Contamination noted in the analytical results from under the east end of each tank. i 03/07/94 Site "Dirty Letter' sent this date to the California State Department of Transportation. 07/31/95 Site placed into the San Joaquin County Local Oversight Program. 08/01/95 NOR and Site Letter sent this date to the California State Department of Transportation. 08/07/95 Site investigation began this date, direct push soil borings advanced near tank pit and dispenser island area. 09/15/95 Date of Site Investigation Report that was submitted by GEOCON Environmental Consultants. Analytical results of soil samples had minor detections in two shallow samples. 04/13/00 Record Title Owner Letter sent to California State Department of Transportation. 05/29/01 SJC/EHD issues directive to the California State Department of Transportation to submit a work plan for a groundwater investigation. 02/15/02 Site Investigation this date, one soil and two groundwater samples were collected by Cone Penetrometer Testing method. 04/10/02 Site Investigation Report submitted this date. Analytical results from soil and groundwater samples submitted for analysis were all non-detect, including oxygenate analyses. The report recommends site closure.