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CHRONOLOGY <br /> 5458 SECTION, STOCKTON <br /> 12/30/98 An 8000 gallon gasoline UST, an 8000 gallon diesel UST and a <br /> 1000 gallon unknown fuel UST were removed this date? Soil <br /> samples were collected from beneath the USTs and analysis <br /> confirmed contamination. <br /> 01/29/99 Date of "Interim Soil Remediation Work Pian". <br /> 02/19/99 Excavation of 90 cubic yards of soil took place. Total depth of the <br /> excavation Was 18 feet. Six soil samples from the bottom and sides <br /> of the excavation were collected. MTBE at 14 mg/kg was detected ' <br /> in an 18 feet sample. <br /> 05/06/99 Date of"Interim Soil Remediation Report" of 2119199 work. <br /> 07/27/99 Date of "Prel,iminary Site Assessment Work Plan" to perform further <br /> site assessment. <br /> 09/10/99 Work plan dated 7127199 approved by Environmental Health (EHD).'. <br /> 11/21/00 EHD letter requesting work proposed 7127199 be completed. <br /> 02/20/01 Four soil borings were drilled with collection of soil and "a grab water.` <br /> sample. <br /> 08/07/01 Date of"Preliminary Investigation & Evaluation Report"of 2120101 <br /> work_ Only contamination found was from 20 to 40 feetf in the boring <br /> placed in the known area of contamination. The only contaminant <br /> found in the grab water sample was TPH-mo at 360 ug/i. <br /> 10/22/01 EHD letter requesting specific further investigation after'discussing <br /> the site with RWQCB staff. <br /> 12/06/01 Date of"Soil,Vapor Extraction Feasibility Pilot Test Work Plan". <br /> 03/19/02 Installation of vapor well and collection of soil samples. <br /> 03/27/02 Vapor Extraction test conducted. <br /> 09/05/02 Date of"Closure Summary Report" that has results of 3127102 <br /> investigation and recommends closure. <br />