Source Zone Delineation Demonstration Report - Triad Resource ...

More documents

Recommendations

Info

Davis-Weber CanalDetail AreaHillAir ForceBaseROYOperable Unit 12 (OU 12)TCE PlumeRoyGateWeber CountyDavis CountyCLINTONSource Investigation AreaTCE Concentrations ( g/L)5 - 1010 - 100100 - 10001000 - 10000SUNSETHILLAIR FORCEBASEAdapted from:Montgomery Watson Harza , 2002.Draft Operable Units 5 and 12Active Soil-Gas Survey Source AreaInvestigation ReportHill Air Force Base, Utah, April 2002.Site map showing TCE PlumeOperable Unit 12 (OU 12)Hill Air Force Base, Utah500 0 500 1,000FeetFIGURE 2-1March 2003 2-2 OU 12 Demonstration ReportFinal
held as a residual phase within the unsaturated soils and possibly within a capillary smear zone underlyingOU 12. Indirect evidence supporting the presence of a vadose zone TCE source area included:A well-defined groundwater plume with high TCE groundwater concentrations in the central, nearsourceregion (see Figure 2-1).Results of recent soil gas surveys defining the presence of TCE in soil gas within the vadose zoneunderlying OU 12. The recent discovery of buried drums near the ground surface generally correlated with soil-gassurvey results (see Figure 2-2). The presence of a solid ash-like material within a drum having TCE concentrations exceeding 16,000mg/kg.The apparent absence of pure-phase TCE within the saturated zone underlying OU 12 (as indicated bypast investigations).Fluctuations in groundwater TCE concentrations in down-gradient monitoring wells suggestingperiodic dissolution of residual-phase TCE within the vadose zone during infiltration events, and/orperiodic dissolution of TCE within the capillary smear zone during changes in the local water tableelevation.2.3 Preliminary Vadose Zone StratigraphyThe vadose zone stratigraphy of the OU 12 site is complex. The upper portion consists mainly of sandwith gravel and silty-sand interbeds, grading to increasing amounts of sandy-silt and silt with depth. Thehighest measured concentrations of TCE in the soil gas appear to be associated with the deeper, finergrainedintervals. Depth to groundwater increases from approximately 50 feet bgs in the south to 80 feetbgs in the north. The cross-section shown in Figure 2-3 illustrates the initial conceptualization of thevadose zone stratigraphy, based on a generalized interpretation of logs from CPT borings advancedduring a soil gas survey conducted at the site in late 2001 and early 2002 [MWH, 2002a].Figure 2-2. Recently discovered drums located near ground surface at OU 12.March 2003 2-3 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 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 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 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 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
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 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
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 ...

Create successful ePaper yourself

Delete template?

Save as template?