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CHRONOLOGY <br /> ULTRAMAR <br /> 2448 W. KETTLEMAN LANE <br /> SITE CODE: 1948 <br /> APN: 058-140-01-3 <br /> I <br /> 04/12/85 PHS/EHD became involved in site assessment <br /> and cleanup of groundwater and soil <br /> contaminated with gasoline . <br /> 08/28/85 Groundwater recovery well installed and <br /> groundwater assessment continued. <br /> 08/02/89 EHD completed and processed UAR. <br /> 12/01/89 SVE wells installed and extractions/removal <br /> began. <br /> 09/1.2/90 Site placed into L.O.P. Due to drop in <br /> groundwater, replacement wells will be <br /> required to continue to assess contamination <br /> plume . <br /> 03/09/92 VES has removed 5000- pounds If gasoline to <br /> date, groundwater contaminant concentrations <br /> continue to decrease. <br /> 05/28/92 VES converted from thermo to carbon and <br /> continues to operate. <br /> 10/14/92 On site production well filled with cement <br /> grout under EHD permit ##92-3447 <br /> 04/39/94 VES taken off line, equipment dismantled and <br /> removed; 1600 gal . of gasoline treated to <br /> date. <br /> 09/08/94 Six confirmation soil boring completed to <br /> groundwater; CB #4, 5 &6 positive for <br /> gasoline-. An estimate of 60 gals. of <br /> gasoline remains in place in the vadose zone . <br /> 01/12/95 All remaining monitoring wells which contain <br /> groundwater and sampled are below detection <br /> limits; groundwater cleanup appears to be <br /> completed. <br /> 08/15/95 Delta Environmental Consultants prepared a <br /> report entitled Site Closure Evaluation <br /> Report which contained a request for site <br /> closure. <br /> 09/27/95 All MW' s sampled were below detection limits . <br />