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i <br /> UNOCAL #6981 0 • Page 2 of <br /> C Residential C Commercial O Utility Worker <br /> Petroleum Constituents in Soil: <br /> C s 5 Feet bgs C>5 Feel bgs and 510 Feet bgs G Unknown <br /> Soil Concentrations of Benzene: <br /> C>1.9m91k9ands2.8mglkg 0>2.8mglkgand58.2m9*9 C>8.2mglkgand512mg1k9 C>12m9lkgand514mgAg 0>14mg1kg @Unknown <br /> Soil Concentrations of EthylBenzene: <br /> C>21 mg/kg and s 32 mg/kg 0>32mgBgands89m9lkg C>89mglkgand5134mglkg 0>l34mg/kgand5314mglkg C>314mg&g GUnknown <br /> Soil Concentrations of Naphthalene: <br /> O>9.7 mgfkg and s 45 mg/kg O>45 mg/kg and s 219 mg/kg O>219 mglkg @Unknown <br /> Soil Concentrations of PAN: <br /> C>0.063 mg/kg and s 0,68 mglkg C>0.68 mg/kg ands 4.5 mg/kg O>4.5 mg/kg G Unknown <br /> Area of Impacted Soil: <br /> C Area of Impacted Soil>82 by a2 Feet O Unknown <br /> Additional Information <br /> ShoUld this use be closed in spite of NOT meeting policy criteria? <br /> Explain: <br /> Problem with passing all the LTCP criteria is that soil samples from only two borings were <br /> analyzed for four not enough to <br /> (aced;atleguately characterize the site in my opinion (ad; most soil data starts at 20 to 25 feet bag, some <br /> ti <br /> at 15 feet bag, s OO VES C NO <br /> deeper. The deeper soil data is suggestive of favorable shallow soil conditions, but too little hard data. Despite this, the <br /> site is <br /> in the closure process as the dissolved plume has lost mass and Concentration intensity and is trending toward FgOs. <br /> Th, site is in a commercial area and there are no sensitive receptors reported to be potentially threatened. <br /> SPELL CHECK <br /> Fsave in Progress save as Final <br /> LOGGED IN AS HENOERSONN CONTACT GEOTRACKER HELP <br /> https:Hgeotracker.waterboards.ca.gov/regulators/screens/closure policy.asp?global id=T06... 8/7/2013 <br />