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DAKOTA TECHNOLOGIES <br />UVOST LOG REFERENCE <br />2008-12-12 <br />Main Plot : <br />Signal (total fluorescence) versus depth where signal is relative to the <br />Reference Emitter (RE). The total area of the waveform is divided by the total <br />area of the Reference Emitter yielding the %RE. This %RE scales with the <br />NAPL fluorescence. The fill color is based on relative contribution of each <br />channel's area to the total waveform area (see callout waveform). The channel- <br />to--color relationship and corresponding wavelengths are given in the upper right <br />corner of the main plot <br />Callouts : /Waveforms from <br />selected depths or <br />depth ranges showing C.-1 0.0• M •g-1 r••16) .O . 4,0 - C-.-O -- <br />.0 - <br />the multi-wavelength <br />waveform for that ' <br />depth. <br />n <br />The four peaks are due <br />to fluorescence at four <br />waveleng#Is and <br />referred to as <br />"channels: Each <br />channel is assigned a <br />color. <br />Note Al- <br />Conductivity Plot : <br />The Electrical <br />Conductivity (EC) of the <br />soil can be logged <br />simultaneously with the <br />UVOST data. EC often <br />' provides insight into the <br />stratigraphy. <br />Note the drop in EC from <br />10 - 13 ft, indicating a <br />shift from consolidated to <br />unconsolidated <br />stratigraphy This <br />correlates with the <br />observed NAPL <br />distribution. <br />.7 <br />S.Rate Plot : <br />The rate of probe <br />' advancement. - 0.Elin <br />(2cm) per second is <br />preferred. <br />Various NAPLs will . <br />have a unique <br />waveform lingerprint- i1 1,1 <br />12.S WEdue to the relative <br />amplitude of the four <br />channels and/or <br />broadening of one or <br />more channels. <br />'eo <br />..>1 Note C <br />It <br />b \ <br />A noticeable decrease in <br />the rate of advancement <br />may be indicative of <br />difncult probing <br />conditions (gravel, <br />angular sands, etc.) <br />such as that seen here <br />at -5 ft. <br />Basic waveform <br />statistics and any <br />operator notes are <br />given below the callout <br />300. 4 WI <br />1,/ <br />Not€ <br />t' <br />=0, <br />20 6 G d <br />2- Notice that this log was <br />terminated arbitrarily, not <br />due to "refusal", which <br />would have been <br />indicated by a sudden <br />4 ,o rate drop at final depth. <br />9 <br />Sample Data UVOST Ely Dahota <br />U../0-F- 4/0/ <br />40 54130700N I 0098-44 2413* <br />Info Box :DAKO-IA *fclo..Lon*de / Fk Ul"Vt <br />0„477.70.W,30 71.vIE. 1123.Contains pertinent logE#eva-aliT,1,0 <br />--"----""' St Gom»In #UVOIT1000 782, R -&11.,2,1*0*7'k info including name and <br />i location. <br />Note A: <br />Time is along the x axis. No scale <br />is given, but it is a consistent <br />320ns wide. <br />The y axis is in mV and directly <br />corresponds to the amount of <br />light striking the photodetector. <br />Note B: <br />These two waveforms are dearly <br />different. The first is weathered <br />diesel from the log itself while the <br />second is the Reference Emitter <br />(a blend of NAPLs) always taken <br />before each log for calibration. <br />Note C: <br />Callouts can be a single depth <br />(see 3rd callout) or a range (see <br />4th callout). The range is noted <br />on the depth axis by a bold line. <br />When the callout is a range, the <br />average and standard deviation <br />in %RE is given below the <br />callout.