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!� � l� � irk � � l• � � �� 1� �� �� � <br /> Is <br /> RECEPTOR <br /> SURFACE <br /> INHALATION ELEVATION <br /> EXPOSURE SLAB ON GRADE <br /> ROUTE <br /> PREDOMINANTLY <br /> SAND <br /> I <br /> Q_ GROUNDWATER <br /> ELEVATION <br /> VOLATILIZATION OF CONTAMINANT MASS <br /> PREDOMINANTLY <br /> SILT/SAND <br /> REMAINING CONTAMINANT MASS <br /> 4 (PREDOMINANTLY CONFINED IN ZONE B) <br /> LINCREASED VOLATILIZATION THROUGH SPARGING <br /> I <br /> AIR SPARGE WELL <br /> I <br /> SITE CONCEPTUAL MODEL FIGURE <br /> VAPOR INTRUSION PATHWAY <br /> Former UNOCAL Station 5098 Request for <br /> 5606 Pacific Avenue Reduction in Sampling <br /> 10411 Old Placerville Road Suae 210 Stockton,California <br /> Sacamertito Cal fomie 95827 <br /> Phone (916)362 7100 <br /> Fax (916)362100 DRAWN BY REVIEWED BY DATE PROJECT NUMBER <br /> Web WWWENSRCOM P RHOADS RL 727/2005 06940-293 <br />