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<br /> Introduction
<br /> Mobil oil corporation is conducting site evaluations of ser-
<br /> vice stations as part of a prope-rty transfer program with H.P. Oil,
<br /> TARGET Environmental Services, Inc, (TARGET) was contracted as part
<br /> of this program to perform soil gas surveys to determine the pas-
<br /> sible
<br /> pretence and extent of subsurface hydrocarbon contamination
<br /> at these sites. The field phase of the soil gas survey performed
<br /> at Mobil Service Station #10-297, 1403 Country Club Boulevard,
<br /> Stockton, California, %,'as conducted on March 11, 1989.
<br /> oetectablity
<br /> The soil gam survey data presented in this repert are the
<br /> result of precise sampling and measurement of contaminant concen-
<br /> trations in the vadese zone. Analyte detection at a particular
<br /> location is representative of vapor, dissolved, and/or liquid phase
<br /> contamination at that location. The presence of detectable levels
<br /> of target analytes in the vadose zone is dependent upon several
<br /> factors, including theresence o
<br /> p f vapor--phase hydrocarbons or
<br /> dissolved or liqufd concentrations adequate to facilit;.te volatili-
<br /> zation into the unsaturated zone.
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