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A S S O C I A T E S I N CI <br /> Isoconcentration maps showing the lateral extent of impacted groundwater for TPHg and <br /> benzene are shown on Figures 5 and 6,respectively <br /> 1 <br /> 5.0 DISCUSSION <br /> Based on the analytical results of soil samples collected from bonngs SB8 and SB9A, it is the <br /> Judgment of ATC that vertical extent of impacted soil is limited to less than 45 feet bgs The <br /> lateral extent of impacted soil is generally limited to within 50 feet of the former USTs <br /> upgradient and crossgradient, but extends to well MW7 in the downgradient direction The <br /> ' extent of impacted groundwater has not been defined downgradient to the northeast <br /> According to information provided by Mr Raymond Farmer, the property owner, the City of <br /> ' Stockton has leased the lot adjacent to 610 North Hunter containing wells MW3, MW6, and <br /> MW7 Apparently, the City of Stockton is planning on constructing a building to be placed on <br /> the northern portion of the lot west of well MW7 Mr Farmer stated in an onsite meeting June <br /> ' 23, 1999, that the proposed building might be on top of well MW7 ATC proposes to meet with <br /> the City of Stockton to discuss how their development of the property may affect the subsurface <br /> investigation and will propose additional site activities to the PHS/EHD after that meeting <br /> 1 <br /> 1 <br /> w 1625961reportslphui doe 6 <br />