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t <br /> CHRONOLOGY <br /> ELKHORN COUNTRY CLUB <br /> 1050 ELKHORN, STOCKTON <br /> 5/21/91 A 1000 gallon unleaded gasoline UST was removed under permit <br /> and inspection of Environmental Health Division (EHD). <br /> 8/2/91 EHD reviewed soil sample results from samples collected beneath ` <br /> the UST. An unauthorized release form and a Prop 65 form were I! <br /> filed. <br /> 6/7/94 EHD approved a work plan for a soil boring. Oversight was through <br /> the local EHD Site Mitigation Program. <br /> 6/20/94 Soil boring was drilled to 38 feet deep. Strong odor was observed <br /> during drilling. Groundwater was encountered at 36 feet below <br /> surface grade (bsg). <br /> 6/21/94 The site was placed in LOP. <br /> 7/18/94 EHD letter requesting a work plan for installation of monitoring <br /> wells. E <br /> 8/18/94 Work plan for installation of monitoring wells. h <br /> 8/30/94 Installation of 3 monitoring wells. All wells screened from 29 to 49 <br /> feet. <br /> 10/13/94 Date of Preliminary Investigation and Evaluation Report covering <br /> June 1994 and August 1994 work. MW3 closest to the UST area. <br /> MW2 had the highest groundwater contamination. f <br /> 2/1/95 Date of Quarterly Report recommending installation of 2 more <br /> monitoring wells. f <br /> 2/17/95 EHD letter requesting a well survey and work plan for installation of <br /> more monitoring wells. <br /> 8/31/95 Monitoring wells 4, 5, and 6 installed. Wells screened from 28 to l <br /> 48 feet. <br /> 12/26/95 Date of Quarterly Report that includes information on installation of <br /> monitoring wells on 8/31/95. <br /> i <br /> k <br />