Source Zone Delineation Demonstration Report - Triad Resource ...

More documents

Recommendations

Info

24U12-VP5 Combined Testing20161284600U12-VP2 Combined Testing500400300200100TCE Concentration (ppmv)000 20 40 60 80 100Time (min)00 50 100 150 200 250Time (min)1,400U12-VP1 Combined Testing1,2001,00080060040020000 50 100 150 200 250TCE Concentration (ppmv)TCE Concentration (ppmv)80U12-VP3 Combined Testing70605040302010TCE Concentration (ppmv)0 20 40 60 80 100Time (min)60U12-VP6 Combined Testing504030201000 20 40 60 80 100 120 140Time (min)Time (min)140U12-VP4 Combined Testing120100806040TCE Concentration (ppmv)TCE Concentration (ppmv)U12-1802U12-VP3U12-1803U12-1812 U12-1811U12-VP5140U12-VP7 Combined Testing120100806040U12-1814U12-1815U12-1806U12-1810U12-VP6U12-VP2 U12-1807U12-1804U12-1813 U12-VP1U12-1817U12-VP7U12-VP4U12-1808ApproximateLocation ofExcavatedBarrelsU12-1809U12-1805TCE Concentration (ppmv)20U12-18162000 25 50 75 100 125 150Time (min)Extent in Plan View of 3D SoilTCE Iso-concentration Surfaces00 20 40 60 80 100 120 140 160Time (min)Soil Vapor Extraction (SVE) Boring1,000 ug/kgWireline Sampler Boring10,000 ug/kg100,000 ug/kg20 0 20 40FeetTCE Vapor Phase and Soil ConcentrationsOperable Unit 12 (OU 12)Hill Air Force Base, UtahOPERABLE UNIT 12 SOURCE INVESTIGATION AREAFIGURE 7-2March 2003 7-6 OU 12 Demonstration ReportFinal
20Porosity = 30%NAPL Dilution Factor161284Moisture = 5 to 20 vol%foc = 0.002 mg/mgMoisture = 10 vol%foc = 0.001 mg/mg00 100 200 300 400 500TCE Sample Concentration (mg/kg)Figure 7-3. NAPL dilution factor as a function of TCE sample concentration.7.3 RecommendationsDuring the OU 12 soil investigation, a separate LNAPL phase was identified in the upper portions of thevadose zone located in the suspected source area adjacent to vapor extraction wells U12-VP1 and U12-VP2. Soil samples that exhibited LNAPL also were shown to have elevated concentrations of TCE. Themodeling of TCE contamination in the soil illustrated that the highest levels of soil contamination arelocated near the top of the screened intervals of U12-VP1 and U12-VP2. In addition, the upper nine feetof the screened interval in both wells are located in an extensive silty-sand region, similar to the highestsoil contamination. These observations are manifest in the high TCE concentrations observed in theextracted vapor from U12-VP1 and U12-VP2. Because the measured concentration of TCE in theextracted soil vapor corresponds to an average vapor concentration for the entire length of the screenedinterval, it is impossible to delineate the relative contribution to the total measured contaminationsupplied by the various soil intervals spanned by the screen. However, due to the close proximity of U12-VP1 and U12-VP2 to high soil contamination and the local soil stratigraphy of their screened intervals, itis inferred that the upper few feet of the intervals (typically 30 to 40 feet bgs) for these wells yielded thebulk of the contaminated vapor.Thus, it is recommended that vapor extraction operations be conducted using the existing extraction wellsU12-VP1 and U12-VP2 to evaluate contaminant mass (including both petroleum hydrocarbon andchlorinated ethenes) removal over a 30-day period. Results obtained from the 30-day investigationshould be evaluated to determine whether continued vapor extraction operations are beneficial forreduction of source zone contamination. In addition, it is recommended that any additional investigationsshould focus on determining the presence or absence of DNAPL in the saturated zone, and evaluating thepotential presence of contaminant mass in the vicinity of the two geophysical anomalies previouslyidentified to the northeast and southwest of the excavated drum area.March 2003 7-7 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 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 150 and 151: 8.0 REFERENCESBear, J. 1979. Hydrau
Page 152 and 153: TABLE A-1FIELD ANALYICAL RESULTS FO
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 184 and 185: TCE Concentration (ppmvTCE Concentr
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:
U12-PV2Source Area #1TCE Concentrat
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
TCE Concentration (ppmv1,4001,2001,
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?