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1444 TILLIE LEWIS , <br /> STOCKTON CA <br /> "CHRONOLOGY <br /> TANK #1 4000 GALLON XYLENE REMOVED 06-29-90 <br /> 06-29-90 One 4000 gallon xylene tank removed this date under permit and <br /> inspection of PHS-EHD. The inspector noted the steel tank to be in <br /> poor condition with corrosion and pitting on the bottom. Two soil <br /> samples were obtained from beneath the tank at approx. 12' bgs in <br /> loa'mlclay soil. The soil was discolored and had strong petroleum odors. <br /> 07-18-90 PHS-EHD receives soil sample results. The results are shown below. <br /> Initial Laboratory Analysis - Soil <br /> Laidlaw Corporation <br /> Stockton, CA <br /> (in ppm) <br /> SAMPLE ED $< T....: 'X TPHG <br /> 06/29/90 LS-TPI-I 2'N NO 10 740 5,220 8,000 <br /> f <br /> LS-TPI-12'S NO 42 4,700 27,100 47,000 <br /> METHOD DEI E:CTEON LIMIT 10 10 10 I 10 2.000 <br /> 07-24-90 PHS-EHD flies prop 65 and UAR this date. <br /> f <br /> 03-04-91 PHS-EHD receives workplan to over-excavate the former tank.pit area. <br /> 03-11-91 PHS-EHD places site into the LOP this date. <br /> 03-19-91 Former tank pit over-excavated this date. Final dimensions are <br /> 40'Ix35'x14'. Approx. 750 cubic yards of soil removed from the pit. Six <br /> sidewail and 4 bottom samples were. collected from the finished <br /> excavation. <br /> 03-27-91 Three monitoring g wells installed this date. <br /> a <br /> 06-10-91 PHS-EHD receives verbal groundwater results that indicate groundwater <br /> has been impacted. PHS-EHD updates MFR and prop 65 notification <br /> this date. <br /> I <br />