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44 <br /> 1` <br /> • spreading vertically The laboratory results show the contamination to be confined <br />• between 10 to 20 feet bgs around B-3 and B-4 <br /> A leaching potential analysis was performed using Table 2-1 from the Leaking <br /> Underground Fuel Tank (LUFT) Field Manual, California State Water Resources Control <br />• <br /> Board, October 1989 A copy of this can be found in Appendix C This leaching potential <br /> analysis considers various factors which influence the vertical migration of hydrocarbons in <br /> the soil and the depth to groundwater This analysis shows the allowable concentrations <br />• <br /> that possibly can remain in place are 1,000 ppm TPH-D and 0 3/0 3/1/1 ppm BTXE, <br /> j respectively <br />• <br />• <br />• <br />• <br /> i <br />. r2pld-08(ml4) Page 11 <br /> AMERICAN <br /> [N �[Y�ltiTn4 rnAtiwG4Hf SVT COQ+ <br />