Source Zone Delineation Demonstration Report - Triad Resource ...

More documents

Recommendations

Info

Figure 5-42 shows a comparison between the predicted and the measured TCE concentration profiles inthe vapor phase at extraction wells U12-VP1 and U12-VP2 for source area 2. Source area 2 is locatedapproximately 8 feet northeast of U12-VP1 and 15 feet southeast of U12-VP2, and represents a simulatedTCE source 10 feet by 10 feet in areal extent and 5 to 15 feet thick. An initial source concentrationranging from 1,000 to 25,000 mg/kg prior to a 30-year diffusion period and from 50 to 200 mg/kg withoutdiffusion was investigated. Without a pre-extraction diffusion period, the predicted concentration profilesshow a sharp increase in TCE concentration with increased time typically associated with advectivedominatedcontaminant transport of a source located distant from the extraction well. This sharp increasein TCE concentration also was observed in the measured concentrations during the SVE demonstration atOU 12. Assuming a 10-foot thick source zone containing 200 mg/kg TCE, the predicted TCEconcentrations for extraction wells U12-VP1 and U12-VP2 are in range of the measured values.However, the exponential decline observed during the blower shutdown periods is not apparent in thepredicted concentration profiles.A comparison between the predicted and the measured TCE concentration profiles in the vapor phase atextraction well U12-VP1 for source area 6 is shown in Figure 5-43. Extraction well U12-VP1 is locatedwithin source area 6, which consists of a simulated TCE source 25 feet by 35 feet in areal extent and 10feet thick. An initial source concentration ranging from 1,000 to 5,000 mg/kg prior to a 30-year diffusionperiod and from 50 to 200 mg/kg without diffusion was investigated. The predicted TCE concentrationprofiles do not match the actual profiles obtained during the SVE demonstration and appear to resemble alocalized, diminishing source or a diffusion-dominated flow regimeFigure 5-44 shows a comparison between the predicted and the measured TCE concentration profiles inthe vapor phase at extraction wells U12-VP1, U12-VP2, U12-VP3, U12-VP4, and U12-VP6 for sourcearea 7. Source area 7 is located approximately 26 feet northeast of U12-VP1 and 28 feet southeast ofU12-VP2, and represents a simulated TCE source 5 feet by 5 feet in areal extent and 5 to 15 feet thick.An initial source concentration ranging from 4,000 to 25,000 mg/kg prior to a 10-, 20-, or 30-yeardiffusion period was investigated. The best match between the predicted and the measured TCEconcentrations was obtained assuming a 5-foot thick source located at a depth of 25 to 30 feet bgs. Thepredicted concentration profiles for U12-VP2 are in relatively good agreement with the observed profiles;however, the predicted concentrations are slightly elevated for the 20- and 30- year diffusion scenario andlow for the 10-year diffusion scenario. For wells U12-VP1 and U12-VP3, only the 30-year diffusionscenario resulted in a reasonable prediction, whereas the results for wells U12-VP4 and U12-VP6 werepoor for all scenarios investigated.The predicted TCE soil concentration after each of the diffusion periods (10, 20, or 30 years) and prior tovapor extraction operations is shown in Figure 5-45 for source area 7 assuming a 5-foot thick sourcelocated at a depth of 25 to 30 feet bgs. The concentration contours shown in Figure 5-45 represent thesoil concentration in the depth interval of the original source (i.e., 25 to 30 feet bgs). As is evident, asignificant fraction of the original simulated source has been lost due to the natural diffusive transport ofthe TCE. The results of vapor extraction conducted for 1 day at U12-VP2 as predicted for source area 7are shown in Figure 5-46 for the soil and Figure 5-47 for the soil gas. Although the short duration ofMarch 2003 5-69 OU 12 Demonstration ReportFinal
U12-VP1 50 mg/kg source 5 ft thick (no diffusion) U12-VP1 200 mg/kg source 5 ft thick (no diffusion) U12-VP1 200 mg/kg source 10 ft thick (no diffusion)1,4001121,4004551,40015751,200961,2003901,20013501,000808006460048400321,0003258002606001954001301,000112580090060067540045020016200652002250 24 48 72 96 120 144 168 192 216Time (min or hrs)U12-VP1 1,000 mg/kg source 15 ft thick (30-yr diffusion) U12-VP1 5,000 mg/kg source 15 ft thick (30-yr diffusion)U12-VP1 10,000 mg/kg source 15 ft thick (30-yr diffusion) U12-VP1 15,000 mg/kg source 15 ft thick (30-yr diffusion)000Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)0 24 48 72 96 120 144 168 192 216Time (min or hrs)00Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)0 24 48 72 96 120 144 168 192 216Time (min or hrs)00Predicted TCE Concentration (ppmv)1,4005641,40039001,40018,9001,40024,5001,2005521,20038001,20016,2001,20021,0001,0005408005286005164005041,00037008003600600350040034001,00013,50080010,8006008,1004005,4001,00017,50080014,00060010,5004007,000Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)20049220033002002,7002003,5004800 24 48 72 96 120 144 168 192 21632000 24 48 72 96 120 144 168 192 216Time (min or hrs)Time (min or hrs)Time (min or hrs)Time (min or hrs)00Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)0 24 48 72 96 120 144 168 192 2160 24 48 72 96 120 144 168 192 2160000Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)1,400U12-VP1 25,000 mg/kg source 15 ft thick (30-yr diffusion)24,500600U12-VP2 200 mg/kg source 10 ft thick (no diffusion) U12-VP2 1,000 mg/kg source 15 ft thick (30-yr diffusion)U12-VP2 5,000 mg/kg source 15 ft thick (30-yr diffusion)1,0206006006004,2001,20021,0001,00017,50080014,00060010,5004007,0002003,5005008504006803005102003401001705005004004003003002002001001005003,5004002,8003002,1002001,400100700Measured TCE Concentration (ppmv)0 24 48 72 96 120 144 168 192 2160 24 48 72 96 120 144 168 192 2160 24 48 72 96 120 144 168 192 2160 24 48 72 96 120 144 168 192 216Time (min or hrs)Time (min or hrs)Time (min or hrs)Time (min or hrs)0000000Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)Measured TCE Concentration (ppmv)Predicted TCE Concentration (ppmv)Figure 5-42. Predicted versus measured TCE concentrations at U12-VP1 and U12-VP2 for source area #2 (predicted concentration shown in blue and measured concentration shown in red).March 2003 5-70 OU 12 Demonstration ReportFinal
Page 1 and 2:
FinalSource Zone Delineation Demons
Page 3 and 4:
EXECUTIVE SUMMARYThis report docume
Page 5:
The SVE demonstration conducted in
Page 8 and 9:
TABLE OF CONTENTSEXECUTIVE SUMMARY
Page 10 and 11:
LIST OF FIGURESFigure ES-1 Iso-Conc
Page 12 and 13:
Figure 5-38 Horizontal slices at fi
Page 14 and 15:
LIST OF ACRONYMS AND ABBREVIATIONSA
Page 16 and 17:
Hill Air Force BaseUtahRIVERDALEWeb
Page 18 and 19:
Co-Team LeaderCo-Team LeaderURS Pro
Page 20 and 21:
1.4 Report OrganizationThe remainin
Page 22 and 23:
Davis-Weber CanalDetail AreaHillAir
Page 24 and 25:
ANorthSouthU5-18864,580CROSS SECTIO
Page 26 and 27:
Approx. LocationOf BarrelsInitial S
Page 28 and 29:
Figure 3-2. Wireline locking and re
Page 30 and 31:
3.3 DSITMS Soil AnalyticsDirect sam
Page 32 and 33:
4.0 SOIL VAPOR EXTRACTION DEMONSTRA
Page 34 and 35:
The equilibrium four-phase distribu
Page 36 and 37:
3520 ft. from well, 3.5 cfmTCE in E
Page 38 and 39:
The SVE system included piping from
Page 40 and 41:
SVE Process System and On-Site DSIT
Page 42 and 43:
Table 4-3. Summary of OU 12 SVE Ste
Page 44 and 45:
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 56 and 57:
298400298360Northing (ft)2983202982
Page 58 and 59:
The final TCE soil contamination mo
Page 60 and 61:
298400298360Northing (ft)2983202982
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 96 and 97: 1400.491200.42TCE 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 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
Page 146 and 147: Figure 7-1. Iso-concentration surfa
Page 148 and 149: 24U12-VP5 Combined Testing201612846
Page 150 and 151: 8.0 REFERENCESBear, J. 1979. Hydrau
Page 152 and 153: TABLE A-1FIELD ANALYICAL RESULTS FO
Page 164 and 165:
TABLE A-1FIELD ANALYICAL RESULTS FO
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
APPENDIX BSimulated TCE Vapor-Phase
Page 172 and 173:
TCE Concentration (ppmv2,4702,4602,
Page 174 and 175:
U12-PV1Source Area #2TCE Concentrat
Page 176 and 177:
U12-PV1Source Area #2250VP1 i=24, j
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
TCE Concentration (ppmvTCE Concentr
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
U12-PV1Source Area #9500450VP1 i=24
Page 198 and 199:
TCE Concentration (ppmTCE Concentra
Page 200 and 201:
700600U12-PV1Source Area #9VP1 i=24
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
U12-PV2Source Area #10250VP2 i=23,
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
TCE Concentration (ppm1.00.90.80.70
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
U12-PV6Source Area #101816VP6 i=33,
Page 236:
TCE Concentration (ppm6050403020100
show all

Source Zone Delineation Demonstration Report - Triad Resource ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?