|
� v
<br /> 0
<br /> A S S O C I A T E S I N C
<br /> me
<br /> 5.0 SUMMARY OF SOIL AND GROUNDWATER CONDITIONS
<br />'
<br /> 51 Extent of H drocarbon-Im acted Soil
<br />' The lateral extent of TPHg in soil is delineated by borings MW5, MW 10, SB 10, and SB 16 to the
<br /> northeast and north, borings MW4 and MW2 to the west, borings MW9, SB 10, SB 14, SB 15, and
<br /> SB16 to the east, and borings MW8, SB 11, SB13, and SB14 to the south The highest
<br /> concentrations of TPHg appear to be in the vicinity of the former USTs, from approximately 20 feet
<br /> bgs to 30 feet bgs TPHg was detected in soil samples at concentrations ranging from nondetect to
<br /> 8,700 parts per million The lateral extent of TPHg in soil is shown on Figure 7
<br /> The lateral extent of benzene in soil is delineated by borings MW5, SB9, and SB 12 to the north,
<br />' borings MW4 and MW2 to the west, bonngs MW7, MW9, MW10, SB 10, SB 15, and SB16 to the
<br /> east, and bonngs MW4, MW6, MW8, SB7, SB 11, SB13, and SB14 to the south The highest
<br /> concentrations of benzene appear to be in the vicinity of the former USTs, from approximately 20
<br />' feet bgs to 30 feet bgs Benzene was detected in soil samples at concentrations ranging from
<br /> nondetect to 35 parts per million The lateral extent of benzene in soil is shown on Figure 8
<br /> 5.2 Estimated Extent of Hydrocarbon-Impacted Groundwater
<br /> The lateral extent of TPHg in groundwater is delineated by groundwater samples from borings
<br />' SB16 and wells MW10 and the Canepas Well to the northeast and northwest, groundwater samples
<br /> from wells MW2, MW4, and the Canepas Well to the west, groundwater samples from borings
<br /> SB15 and SB16 and wells MW9 and MW10 to the east, and groundwater samples from borings
<br /> SB13 and SB14 and wellMW8 to the south The highest concentrations of TPHg appear to be in
<br /> the vicinity northeast of the former USTs TPHg was detected in groundwater samples at
<br />' concentrations ranging from nondetect to 84,000 parts per billion The lateral extent of TPHg in
<br /> groundwater is shown on Figure 9
<br /> The lateral extent of benzene in groundwater is delineated by groundwater samples from borings
<br /> SB16 and wells MW5, MW10, and the Canepas Well to the northeast and northwest, groundwater
<br /> samples wells MW2, MW4, and the Canepas Well to the west, groundwater samples from borings
<br />' SB15 and SB16 and wells MW9 and MW10 to the east, and groundwater samples from borings
<br /> SB13 and SB14 and wells MW4 and MW8 to the south The highest concentrations of benzene
<br /> appear to be in the vicinity northeast of the former USTs benzene was detected in groundwater
<br />' samples at concentrations ranging from nondetect to 2,100 parts per billion The lateral extent of
<br /> benzene in groundwater is shown on Figure 10
<br />' 6.0 REVIEW OF ADJACENT SITE ANALYTICAL DATA
<br /> ATC has reviewed the Condor Earth Technologies', Additional Soil and Groundwater
<br /> Investigation Report, Canepa's Car Wash, 248 Park Street, Stockton, California, dated May 8,
<br />' w lwordpro1625961reponsloff-site doe 7
<br />
|