Source Zone Delineation Demonstration Report - Triad Resource ...

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1400.491200.42TCE Concentration (ppmv)1008060400.350.280.210.14Cumulative TCE Removal (grams)200.0700.000 20 40 60 80 100 120 140 160Time (min)14016.812014.4TCE Concentration (ppmv)10080604012.09.67.24.8Extraction Rate (scfm)202.400 20 40 60 80 100 120 140 1600.0Time (min)Figure 5-36. TCE vapor data obtained at U12-VP7 during OU 12 SVE demonstration (red linedenotes cumulative TCE removal in grams [top graph] and extraction rate in scfm [bottom graph]).March 2003 5-51 OU 12 Demonstration ReportFinal
streamtubes can result in the mixing of contaminated streamtubes with uncontaminated streamtubes.Under these conditions, concentrations of contaminants are diluted to values below those concentrationsat, or in the immediate vicinity of, a source zone. As the source zone is progressively removed from thewell, the well sees a smaller and smaller source as the angle subtended by the contaminated streamtubebecomes smaller. Thus, the amount of streamtube dilution increases with the distance of the source zonefrom the extraction well. For soil vapor extraction, operating conditions significantly influence the zoneof influence of the treatment system, and subsequently, the amount of streamtube dilution experienced bythe flow field. The effects of streamtube dilution are compounded as the flow regime transitions fromlow-flow to high-flow conditions where mass transfer limitations become increasingly important and canlimit the rate of mass removal thereby, reducing the TCE concentration in the extracted vapor.The position of the screened intervals of the vapor extraction wells in relation to the modeled vadose zonesoil architecture is shown in Figure 5-37. The screened interval of each well is shown in red on a west-toeastvertical cross section through the model at a northing corresponding to the northing of the well. Theinferred soil types immediately adjacent to the screened interval of each well are summarized in Table 5-6. The spatial continuity of soil types between extraction wells, partially apparent on Figure 5-37, isillustrated in Figure 5-38, which shows a series of eight horizontal slices at five-foot increments throughthe soil architecture. The elevation of the slices shown in Figure 5-38 includes the screened interval of allsix of the vapor extraction wells and ranges from 4,560 to 4,525 feet amsl. A red circle surrounding ablue dot indicates that a well is screened at the indicated elevation, whereas a solid blue dot indicates thata well is not screened at that elevation.The modeling of TCE contamination in the soil illustrated that the highest levels of soil contamination arelocated at an elevation approximately between 4,555 and 4,560 feet amsl, and at an easting between1,856,090 and 1,856,110 feet and a northing between 298,250 and 298,280 feet. The top of the screenedinterval of U12-VP1 is located within this region while the top of the screened interval of U12-VP2 islocated on its outer perimeter. In addition, the upper nine feet of the screened interval in both wells arelocated in an extensive silty-sand region, similar to the highest soil contamination. The middle six feet ofTable 5-6. Percentage of Soil Type in Screened Interval of Vapor Extraction WellsBoringScreenedPercentage of Soil Type in Screened Interval 1Interval Length(ft) Sand Silty-Sand Sandy-Silt SiltU12-VP1 20.0 0 70 30 0U12-VP2 20.0 0 70 30 0U12-VP3 20.0 0 5 95 0U12-VP4 19.4 0 45 55 0U12-VP5 19.1 0 0 80 20U12-VP6 14.9 0 30 45 25U12-VP7 15.3 25 60 15 01 Rounded to nearest 5 percentMarch 2003 5-52 OU 12 Demonstration ReportFinal
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FinalSource Zone Delineation Demons
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EXECUTIVE SUMMARYThis report docume
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The SVE demonstration conducted in
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TABLE OF CONTENTSEXECUTIVE SUMMARY
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LIST OF FIGURESFigure ES-1 Iso-Conc
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Figure 5-38 Horizontal slices at fi
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LIST OF ACRONYMS AND ABBREVIATIONSA
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Hill Air Force BaseUtahRIVERDALEWeb
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Co-Team LeaderCo-Team LeaderURS Pro
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1.4 Report OrganizationThe remainin
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Davis-Weber CanalDetail AreaHillAir
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ANorthSouthU5-18864,580CROSS SECTIO
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Approx. LocationOf BarrelsInitial S
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Figure 3-2. Wireline locking and re
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3.3 DSITMS Soil AnalyticsDirect sam
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4.0 SOIL VAPOR EXTRACTION DEMONSTRA
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The equilibrium four-phase distribu
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3520 ft. from well, 3.5 cfmTCE in E
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The SVE system included piping from
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SVE Process System and On-Site DSIT
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Table 4-3. Summary of OU 12 SVE Ste
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3,000U12-VP1 Calibration Curve2,500
Page 46 and 47: 5.0 RESULTS OF SOIL SAMPLING AND SV
Page 48 and 49: 0U12-1802100U12-1803100U12-18051020
Page 50 and 51: 0102030405060700U12-1804U12-1807102
Page 52 and 53: Figure 5-4. Soil samples collected
Page 54 and 55: 298400298360Northing (ft)2983202982
Page 58 and 59: The final TCE soil contamination mo
Page 62 and 63: Figure 5-12. Isometric view, lookin
Page 64 and 65: An isometric view of the upscaled a
Page 66 and 67: March 2003 5-21 OU 12 Demonstration
Page 68 and 69: 4620WE460045804560454045204500Verti
Page 70 and 71: 4620WE460045804560Elevation (ft)454
Page 72 and 73: Volumetric calculations yield an es
Page 74 and 75: The position of the water table in
Page 76 and 77: 5.2 OU 12 SVE EvaluationThe OU 12 S
Page 78 and 79: Vapor Probe #1Vapor Probe #2Vapor P
Page 80 and 81: Thus, the in situ air permeability
Page 82 and 83: 0.0000-0.0010U12-VP1 ResponsePressu
Page 84 and 85: 0.000020.00000U12-VP1 ResponsePress
Page 86 and 87: Table 5-5. Estimated In Situ Air Pe
Page 88 and 89: 10.0U12-VP1 Pneumatic Response8.0Ai
Page 90 and 91: 1,400841,20072TCE Concentration (pp
Page 92 and 93: 800.98700.84TCE Concentration (ppmv
Page 94 and 95: 200.018180.016TCE Concentration (pp
Page 98 and 99: 4600OU12-VP1OU12-VP2 OU12-VP3 OU12-
Page 100 and 101: the screened interval in U12-VP1 an
Page 102 and 103: permeability layer. Final adjustmen
Page 104 and 105: Table 5-7. Comparison of Measured a
Page 106 and 107: Table 5-8. continuedFile Name Extra
Page 108 and 109: U12-1802U12-VP3U12-1812U12-1803U12-
Page 110 and 111: U12-1802U12-VP3U12-1812U12-1803U12-
Page 112 and 113: U12-1802U12-VP3U12-1812U12-1803U12-
Page 114 and 115: Figure 5-42 shows a comparison betw
Page 116 and 117: U12-VP1 50 mg/kg source 10 ft thick
Page 118 and 119: 5 10 15 20 25 30 35 40 455 10 15 20
Page 120 and 121: 25 - 30 feet bgs30 - 35 feet bgs35
Page 122 and 123: U12-VP1 200 mg/kg source 10 ft thic
Page 124 and 125: A comparison between the predicted
Page 126 and 127: 5 10 15 20 25 30 35 40 455 10 15 20
Page 128 and 129: U12-VP1 EVS Maximum Soil Concentrat
Page 130 and 131: 9,200Predicted TCE Concentration (p
Page 132 and 133: 6.1 Conventional Sampling and Analy
Page 134 and 135: Table 6-2. Estimated Cost for OU 12
Page 136 and 137: 6.1.2 Direct Push Technology (DPT)T
Page 138 and 139: Table 6-4. Estimated Cost for OU 12
Page 140 and 141: that the Wireline CPT sampler canno
Page 142 and 143: Table 6-5. Summary of Estimated Cos
Page 144 and 145: The Wireline CPT tool is not effect
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Figure 7-1. Iso-concentration surfa
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24U12-VP5 Combined Testing201612846
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8.0 REFERENCESBear, J. 1979. Hydrau
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TABLE A-1FIELD ANALYICAL RESULTS FO
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APPENDIX BSimulated TCE Vapor-Phase
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TCE Concentration (ppmv2,4702,4602,
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U12-PV1Source Area #2TCE Concentrat
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U12-PV1Source Area #2250VP1 i=24, j
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TCE Concentration (ppmvTCE Concentr
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U12-PV1Source Area #9500450VP1 i=24
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TCE Concentration (ppmTCE Concentra
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700600U12-PV1Source Area #9VP1 i=24
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U12-PV2Source Area #10250VP2 i=23,
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TCE Concentration (ppm1.00.90.80.70
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U12-PV6Source Area #101816VP6 i=33,
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TCE Concentration (ppm6050403020100
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