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DAKOTA TECHN ❑ LO7t3IES UVO ST LOG REFERENCE Main Plot Signal (total fluorescence) versus depth where signal is relative to the Reference Emitter (RE). The total area of the waveform is divided by the total _ area of the Reference Emitter yielding the %RE. This %RE scales with the NAPL fluorescence. The fill color is based on relative contribution of each channel's area to the total waveform area (see callout waveform). The channel- to-color relationship and corresponding wavelengths are given in the upper right Rate Plot : corner of the main plot. The rate of probe 6 advancement. - 0.8in (2cm) per second is Callouts : preferred. - Waveforms from selected depths or calioute Dapth(ft) Signal(%RE) 350 490 450 500 Rn.i1Nq A noticeable decrease in depth ranges showing 0.0 the rate of advancement the multi-wavelength 200 may be indicative of waveform for that 100 difficult probing conditions depth. (gravel, angular sands, 10C.0 , 50 etc.) such as that seen The four peaks are due Note A here at -5 ft. to fluorescence at four t00 wavelengths andNotice that this log was referred to as 50 10.0. not terminated arbitrarily, "channels". Each 4. but due to "refusal", as channel is assigned a 33.9 tR Note B indicated by the sudden color. 15 advancement rate drop at 29 final depth. Various NAPLs will 10 .mss have aunique — _ waveform "fingerprint" 11.3 1,E, 0 :A70�E C �T due to the relative _- _-- amplitude of the four 30 �s T channels and/or 20 broadening of one or 10 25. more channels. .. - 1. t 25.3 IRE ie 21.51 Basic waveform statistics and any 39. operator notes are given below the callout. 35. 0 20 40 60 80 0.5 Sample Data uvosT By Dakota cnMantocl.aoa•e a Site Latitude/Datum final depth: Faro ND 46 54.430700 N I WGS-94 32.08 ft DAKOTA Client Longitude/Fix Max signal Info BOX T=HNOl�Ofu ABC Consulting U8847.753700W13D 69.8% 18.161t Contains pertinent log Ho ve 1 aay.+toe Job operatorNnit. Dale 8 Time: GermainrUVOST1000 2007-03-2709:45 info including name and location. _ Note A : Note B : Note C : Time is along the x axis. No scale These two waveforms show two Callouts can be a single depth is given, but it is a consistent different products, each with a (see 3rd callout) or a range (see 320ns wide. unique waveform. The first is 4th callout). The range is noted The y axis is in mV and directly used motor oil and the second is on the depth axis by a bold line. corresponds to the amount of diesel. When the callout is a range, the light striking the photodetector. average and standard deviation in %RE is given below the callout.