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/ <br /> OEO�MATPIK <br /> indicates that exposure to residual petroleum constituents present in soil and groundwater <br /> should not pose an unacceptable health risk to hypothetical future on-site residents under <br /> the conditions evaluated In addition,based on the conservative nature of the PEA <br /> evaluation,the presence of residual petroleum constituents in soil and groundwater <br /> should also not pose an unacceptable human health risk to future commercial and <br /> construction workers at the site. In an April 27,2000 letter;DISC stated that the <br /> analytical data were adequate in both quantity and quality and the residual levels of <br /> petroleum-related hydrocarbons in soils are below levels that would constitute an <br /> unacceptable risk to human health and the envirornnent. In the investigation discussed in <br /> this report,low concentrations of BTEX constituents were detected in the grab <br /> groundwater sample from GMX-29,which is located within affected soil on the Pombo <br /> Property. These constituents had not been detected in groundwater at the time that the <br /> human health screening evaluation was completed Geomatnx will reassess risk at the <br /> site when investigation activities are complete and no additional data are planned to be <br /> collected It should be noted that BTEX has not been detected in groundwater off-site <br /> and the findings of the PEA evaluation remain unchanged in the off-site arm <br /> cvwc_sarew000swaa.MTONIDo soacw aenaovoo_DOC 8 <br />