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CPT Interpretations The parameters selected for output from the program are often specific to a particular project. As such, • not all of the interpreted parameters listed in Table 1 may be included in the output files delivered with this ' report. Table 1 CPT Interpretation Methods Interpreted Description Equation Ref Parameter Mid Layer Depth Depth Depth(Layer Top)+Depth(Layer Bottom)12.0 (where interpretations are done et each point then Mid Layer Depth=Recorded Depth) Elevation Elevation of Mid Layer based on sounding collar elevation Elevation=Collar Elevation-Depth supplied by client Avgqc Avgqc Averaged recorded tip value(qc) " n=1 when interpretations are done at each point Averaged corrected tip(qt)where: Avggr-n±q Avgqt q,=q,+(1_a)•u n=1 when interpretations are done at each point Avgfs-t fs Avgfs Averaged sleeve friction(f,) - n n=1 when interpretations are done at each point Averaged friction ratio(Of)where friction ratio is defined AVgRf_100%*Avols AvgRf as: fs Avggr Rf=100%•— n=1 when interpretations are done at each point qt L Avgu=—Y_ili Avgu Averaged dynamic pore pressure(u) n i.1 n=1 when interpretations are done at each point Averaged Resistivity(this data is not always available Avgu= YRESISTIVITY, AvgRes since it is a specialized test requiring an additional n,., module) n=1 when interpretations are done at each point Averaged UV IF ultra-violet induced fluorescence (this Avg„=t jUVIF' AvgUVIF data is not always available since it is a specialized test n I, requiring an additional module) n=1 when interpretations are done of each point 1 Avg7emp Averaged Temperature(this data is not always available Avgu=n�TEMPERATURE, since it is a specialized test) n=1 when interpretations are done at e4.1 ach paint Averaged Gamma Counts(this data is not always Avgu= 1 EGAMMA, AvgGamma available since it is a specialized test requiring an n=1 whenIinferpretations are dans at each point additional module) SBT { soil Behavior Type as defined by Robertson and See Figure 1 2,5 I Campanella Unit Weight of soil determined from one of the following user selectable options: U.Wt. See references 5 1) uniform value 2) value assigned to each SBT zone 3) user supplied unit weight profile Total vertical overburden stress at Mid Layer Depth. Tst,--,= T.Stress �Y'h A layer is defined as the averaging interval specified by where n is layer unit weight 6v the user. For data interpreted at each point the Mid Layer hi is layer thickness Depth is the same as the recorded depth. EGG CpTSUMM-1.20C-Rev.02-07-31 0�