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KLEINEELDER <br /> 4.4 SUBSURFACE SOILS <br /> Generally the subsurface conditions encountered were as follows <br /> Approximate Interval General Spill Ty1c <br /> r0 to 15 feet Silty Clay (CL) dark brown, some bricks, fill, moist, fine to <br /> medium grained <br /> 15 to 17 feet Sandy Silt (ML) brown, moist, very dense, very fine to fine grained <br /> 17 to 27 feet Sand (SP) dark brown, moist to wet,very dense or <br /> Silty Sand (SM) olive-brown, moist to wet, dense, very fine to <br /> medium grained <br /> 27 to 40 feet Sandy Silt (ML/CL) brown, wet, loose, fine to medium grained or <br /> Silty Clay (SM) gray, wet, very dense <br /> For additional details regarding the subsurface conditions encountered lease refer to the los of <br /> g g , p g <br /> borings (Plates A-1 through A-7) in Appendix A <br /> 4 4 QUALITATIVE FIELD SCREENING <br /> To provide a qualitative indication of the presence of volatile organic constituents in the soil and to <br /> ' monitor the constituent concentrations in the breathing zone, a portable organic vapor analyzer was <br /> used to screen the samples in the field A Photovac MieroTip photo-ionization detector(PID) was <br /> used to measure total ionizable compounds in parts per million by volume(ppmv) of vapor <br /> Soil samples obtained were screened in the field and the PID readings were recorded on the boring <br /> p g g <br /> logs No PID readings above background (2 ppmv) were noted in borings HP-1, HP-2 and HP-3 <br /> ' Petroleum hydrocarbon odors of soil staining was not present in any of the borings <br /> For the protection of the field crew, the PID was also used to measure the total ionizable <br /> concentration in the breathing zone prior to and while drilling the borings No consistent readings <br /> were noted in the breathing zone above 1 ppmv <br /> 20-1129-30/201 7R3 14 Page 8 of 13 <br /> © 1997 KIL1IIfc.IdLr In( July 14, 1997 <br />