VERIFICATION DOCUMENT FOR HWIR99 PSEUDO -THREE DIMENSIONAL AQUIFER MODULE Work Assignment Manager Dr. Zubair A. Saleem and Technical Directions: U.S. Environmental Protection Agency Office of Solid Waste Washington, DC 20460 Prepared by HydroGeoLogic, Inc. 1 155 Herndon Parkway, Suite 900 Herndon, VA 20170 Under Contract No. 68-W7-0035 U.S. Environmental Protection Agency Office of Solid Waste Washington, DC 20460 June 1999 ------- TABLE OF CONTENTS Page 1.0 BACKGROUND 1 2.0 VERIFICATION PLAN 2 3.0 SOFTWARE VERIFIED AND DATA USED 2 4.0 VERIFICATION DESCRIPTION 2 4.1 Stage 1 - Verification of the Average Groundwater Specific Flow Rate 2 4.2 Stage 2 - Verification of the Numerical Component of the Contaminant Transport Sub-Module 3 4.3 Stage 3 - Verification of the Combined Analytical-Numerical Contaminant Transport Sub-Module 6 5.0 SUMMARY OF VERIFICATION RESULTS 6 6.0 REFERENCES 8 Appendix A A-1 Appendix B B-1 Appendix C C-l i ------- LIST OF FIGURES Page Figure 1. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 257, for Well 58 F-l Figure 2. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 504, for Well 81 F-2 Figure 3. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 955, for Well 93 F-3 Figure 4. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 1462, for Well 103 F-4 Figure 5. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 1962, for Well 115 F-5 Figure 6. Surface Water Body Verification F-6 Figure 7. Breakthrough Curves for HWIR99 and Verification Modules at Well 58. . F-7 Figure 8. Breakthrough Curves for HWIR99 and Verification Modules at Well 81. . F-8 Figure 9. Breakthrough Curves for HWIR99 and Verification Modules at Well 91. . F-9 Figure 10. Breakthrough Curves for HWIR99 and Verification Modules at Well 103. F-10 Figure 11. Breakthrough Curves for HWIR99 and Verification Modules at Well 115. F-l 1 LIST OF TABLES Page Table 1. Constant inputs to the verification model 5 Table 2. Receptor Well and Surface Water Body Locations used in Verification 6 li ------- Acknowledgments A number of individuals have been involved with the verification of the aquifer module. Dr. Zubair A. Saleem of the U.S. EPA, Office of Solid Waste, provided overall technical coordination and review throughout this work. Dr. Varut Guvanasen of HydroGeoLogic, Inc. developed the approach for verification of the module. Mr. Theodore P. Lillys of HydroGeoLogic, Inc. implemented the analytical solution and conducted the verification, and the report was prepared by Mr. Lillys, Dr. Guvanasen, and Mr. Patrick Sullivan, also of HydroGeoLogic, Inc. 111 ------- 1.0 BACKGROUND The HWIR99 computational saturated zone simulation module (referred to herein as the Aquifer module) has been developed, tested, documented (US EPA, 1998), and externally reviewed by the Dynamac Corporation (Dynamac, 1998). The Aquifer module comprises the following sub-modules: • Steady-state saturated flow; and • Advective and dispersive transport of soluble constituents. The two sub-modules are described in detail in the HWIR99 Background document for the Vadose and Aquifer modules (US EPA, 1998). The primary assumptions are steady saturated flow within a homogeneous porous media and linear transport. The steady state saturated flow sub-module is an implementation of an analytical solution to the vertically integrated, one-dimensional flow equation subject to boundary conditions as described in the background document (US EPA, 1998). The contaminant transport sub-module is a hybrid analytical-numerical model specifically designed for large scale Monte Carlo simulations where computational efficiency is desirable. The origin of both sub-modules are rooted in the EPA's Composite Model for Leachate Migration with Transformation Products (EPACMTP) (U.S. EPA, 1996a,b,c). Inputs to the saturated flow sub-module consist of • Infiltration and recharge provided by the Vadose and Watershed modules, respectively; • Hydrogeologic parameters {eg., regional hydraulic gradient, saturated thickness, saturated hydraulic conductivity); and • Site-specific parameters (eg., source area, regional groundwater flow direction); The primary output of the saturated flow sub-module is an average groundwater specific flow rate. The transport sub-module expects • Water table concentrations from the Vadose zone module; • Average groundwater specific flow rate from the saturated flow sub-module; • Chemical specific parameters; and • Site specific transport parameters. The primary output of the transport sub-module are concentrations at receptor wells and mass fluxes to an assumed fully-penetrating surface water body. 1 ------- 2.0 VERIFICATION PLAN The verification of the Aquifer module was conducted in stages, described below: 1. Verification of the average groundwater specific flow rate determined by the saturated flow sub- module using Darcy's Law and regional hydrogeologic parameters. Average groundwater specific flow rate is a primary input into the transport sub-module. 2. Verification of the numerical component of the contaminant transport sub-module using an analytical solution. Mass fluxes to the surface water body are derived from this component of the transport solution. Also, receptor well concentrations are based upon the numerical component of the solution 3. Verification of the combined analytical-numerical contaminant transport sub-module using verification results of Stage 2 subject to the analytical portion of the Aquifer transport sub- module. Receptor well concentrations are the product of this stage. The verification approach and results described herein are based on the assumption that initial testing and verification of the Aquifer module has been conducted. The emphasis of the current verification is on the consistency of the output of the Aquifer module. 3.0 SOFTWARE VERIFIED AND DATA USED The Aquifer module is written in Fortran 77 and utilizes features of Fortran 90 for memory management, computational efficiency, and source code readability. The compiler is Digital Visual Fortran V 5.0. The verification plan was executed using the site simulation files (SSF) and global result files (GRF) generated by the HWIR99 Softwate System User Interface (SUI) for a non-degrading Benzene release from a land application unit (LAU) at site identifier "1632106". The concentration in waste level (CW) was set to "3". A complete description of input and output file formats used in HWIR99 is given in Section 4.0 of "The Vadose and Saturated Zone Module Extracted from EPACMTP for HWIR99" (U.S. EPA, 1998). 4.0 VERIFICATION DESCRIPTION 4.1 Stage 1 - Verification of the Average Groundwater Specific Flow Rate The saturated flow sub-module computes the analytic specific flow rate at each node in the computational grid. Print statements were added to the Aquifer module to output these velocities to a file. The contents of that file are in Appendix A. The average flow rate calculated from those results is 732.05 m/y. A regional groundwater specific flow rate, q, can be determined using Darcy's Law ------- where dh/dl is the hydraulic gradient, and K is the saturated hydraulic conductivity. The regional values of gradient and conductivity are given in the site layout SSF, slLA1632106.ssf, as AquGrad 0.013 AquSatK 56341 m/y Using the above values, Equation 1 gives q = 732.43 m/y, a difference of less than 0.1% from the average calculated by the flow sub-module. 4.2 Stage 2 - Verification of the Numerical Component of the Contaminant Transport Sub-Module The Aquifer module simulates the transport of a dissolved contaminant using a hybrid analytical- numerical formulation designed specifically for large scale Monte Carlo simulations. The numerical component of the transport sub-module is a transient, one dimensional numerical solution of the advection dispersion equation aligned with the primary flow direction (U.S. EPA, 1996a,b,c). This approach is verified with an analytical solution by Ogata (1970) and is presented by Freeze and Cherry (1979). The solution is in the form c(x,t,co,u,Dx) = lr erfc I \ x-lJt -exp ' Ux"1 J). erfc / \ x+Ut (2) where u= DX = R= 1 + a*. §R <$>R P B^QcfoC (3a) (3b) (3c) and qx = the average linear groundwater specific flow rate [L/T] aL = the longitudinal dispersivity [L] x = the independent space variable [L] t = the independent time variable [T] R = the retardation factor pB = the bulk density of the saturated porous media [M/L3] Koc = the normalized distribution coefficient for organic carbon foc = the fraction of organic carbon content of the porous media (J) = the effective porosity C0 = the source concentration [M/L3] 3 ------- Equation 2 is subject to the following boundary conditions: C(x, 0) = 0, x > 0, (4a) C(0,t) = Co,t>0, (4b) C(°°,t) = 0, t> 0 (4c) Taken together, Equations 4a-c, define an initially contaminant free semi-infinite domain with a constant source at one end having concentration C0. The boundary condition stated in Equation 4b is inconsistent with the delivery of contaminant mass to the water table from the vadose zone module. Contaminant mass is assumed to arrive at the water table as an arbitrary function of time. The transport sub-module approximates the arbitrary source function with a series of finite step functions. A similar approach may be taken when using Equation 2. Exploiting the linearity of the transport equation, the method of superposition may be employed. For example, let the source concentration, C0, be defined as follows: CoV^beg) ~ C- ^BEG ~ t END) ~ Ca, ( U ' ) - 0. (5a) (5b) (5c) Where C'0 is the Ith constant concentration pulse applied at the water table over the time interval t'BEG < t < t'END. Equations 5 a-c describe a finite, constant concentration or square pulse source that may be used in conjunction with equation (2) to give: Nn Cs{x,t)=. h C(x, t I C BEG'' o ,U,D)-C(x,t t C END'' o U,D) 5 x' (6) where: Cs = Concentration based on superposition at location x and time t [M/L3]. NP = Number of finite source function pulses used to approximate the arbitrary source function. The constant inputs to the verification model, summarized in Table 1, are taken directly from the site layout SSF (slLA1632106.ssf) and the aquifer SSF (aqOl.ssf) (see Appendix B). The vadose zone GRF (vzLA1632106.grf) contains the point estimates of concentrations at the water table (parameter CWT) 4 ------- over time (TWT). These data require pre-processing for use in the verification model. There are NTS concentration-arrival time pairs in the vadose GRF which must be converted into NP average concentrations over NP time intervals, where NP = NTS -1 The pre-processed water table concentrations are presented in Appendix C. Table 1. Constant inputs .0 the veri 'ication model. Source Parameter Value Units Description cpaq.ssf ChemKoc 48.3 mL/g Normalized distribution coef. for organic carbon slLA1632106 AquGrad 0.013 Regional gradient in saturated zone slLA1632106 AquSATK 56341 m/y Saturated hydraulic conductivity aqOl.ssf AL 67.696 m Longitudinal dispersivity aqOl.ssf BDENS 1.3663 g/cm3 Bulk density aqOl.ssf FOC 0.0003 fraction Fraction organic carbon aqOl.ssf POR 0.2228 Effective porosity The site coordinate system used in HWIR99 places the origin at the center of the waste management unit (WMU) and aligns the X and Y axes with true East and North, respectively. The aquifer module transforms the global site coordinates into a local coordinate system whose X axis is aligned with the regional groundwater flow direction and originates at the center of the down gradient edge of the WMU. Receptor locations are also transformed to the local system (see U.S.EPA, 1998). The pseudo-three dimensional aquifer module requires a single discretized space dimension (i.e., the X direction) for numerical simulation. The numerical grid is designed to include a node corresponding to each receptor's local X coordinate resulting in a unique node for each receptor. A logical flag in the aquifer module source code controls the output of the numerical solution for debugging purposes. This flag was turned on so that the aquifer module would report to a file the concentrations over time at each node in the numerical grid. Five receptor wells were selected from the aquifer GRF that are evenly distributed along the direction of flow. The receptor well numbers used for verification are given in Table 2 with site and model coordinates. In addition, the surface water body connection location is included in Table 2. The selection of a surface water body connection location is detailed in "The Vadose and Saturated Zone Modules Extracted from EPACMTP for HWIR99" document (US EPA, 1998). In this instance the connection location is located along the down gradient edge of the WMU. 5 ------- Table 2. Receptor Well and Surface Water Body Locations used in Verification. Receptor Well Number Site Coordinates [m] Model Coordinates [m] X Y Z X Y Z 58 -213.8 -478 0.4896 257.87 308.49 2.9863 81 -289.3 -746.1 0.0321 504.31 438.13 0.196 93 -270.3 -1203 0.6136 955.06 514.44 3.7432 103 920.73 -1469 0.8547 1462.6 595.29 5.2138 115 -17.54 -2179 0.7731 1962.4 470.17 4.7156 Surface Water Body Water Body Network 2, Reach 3, Node 8 400.31 0.25 na 0 0 na 4.3 Stage 3 - Verification of the Combined Analytical-Numerical Contaminant Transport Sub-Module The Aquifer module computes transient receptor well concentrations using a hybrid analytical numerical simulator. The verification of the numerical component was described in the previous section. The analytical component extrapolates the one-dimensional numerical results to receptor well locations (see the The Vadose and Saturated Zone Modules document for details). A select number of well concentrations reported in aquOl.grf file are verified by applying the analytical extrapolation to the one- dimensional verification solution used in section 4.2. Verification is based on the assumption that the initial dimensions of the vertical representation of the source boundary conditions are correct. The selected receptor well locations are given in Table 3. A spread sheet was constructed to compute the analytical extrapolation terms for each of the five receptor well locations. The verification results for each receptor well location are presented in figures 7-11. The module results are in good agreement with the analytical results. 5.0 SUMMARY OF VERIFICATION RESULTS The HWIR99 Aquifer Module developed and document by HydroGeoLogic has been successfully verified. The major components of the Aquifer Module are the steady-state saturated flow sub module and contaminant transport sub-module. The average groundwater specific flow rate flow computed by the flow sub-module is in excellent agreement with the regional flow rate predicted by Darcy's Law. Receptor well concentrations and surface water body mass fluxes are in good agreement with the analytical verification model. A summary of each verification stage is provided below. 1. The saturated groundwater flow sub-module has been verified. Agreement between the sub-module generated average groundwater specific flow rate and the hand-calculated flow rate is excellent. 2. The numerical component of the transport sub-module has been verified. The one-dimensional numerical results are in good agreement with the one-dimensional analytical verification model, as described in section 4.2. 6 ------- The combined analytical-numerical transport sub-module has been verified. Agreement between select receptor well concentrations in the aquifer GRF file and the extrapolated one-dimensional analytical verification model is good. ------- 6.0 REFERENCES Dynamac Corporation, Technical Memo to U.S. EPA OSW. Independent Testing of Groundwater Modules (Interm Comments), 1998. Freeze, R. Allan, Cherry, J. Groundwater. Prentice-Hall, Inc. Englewood Cliffs, New Jersey, p. 391, 1979. Ogata, Akio. Theory of Dispersion in a Granular Medium. U.S. Geol. Surv. Prof. Paper, 411-1, p. 134, 1970. U.S.EPA. The Vadose and Saturated Zone Modules Extracted from EPACMTP for HWIR99, Office of Solid Waste, U.S.EPA, 1988. U.S.EPA, EPA's Composite Model for Leachate Migration with Transformation Products, EPACMTP. Background Document, Office of Solid Waste, U.S. EPA, 1997. 8 ------- Appendix A ------- The table below lists the velocities determined along the one-dimensional numerical described in Section 4.2. Specific Flow Rates from Analytic Solution at all Computational Grid Nodes. Node Number Velocity [m/yr| Node Number Velocity [m/yrl Node Number Velocity [m/yrl Node Number Velocity [m/yrl 1 716.14 49 722.24 97 731.58 145 737.04 2 716.27 50 722.36 98 731.71 146 737.17 3 716.40 51 722.49 99 731.84 147 737.31 4 716.53 52 722.62 100 731.97 148 737,15 5 716.65 53 722.74 101 732.10 149 737.58 6 716.78 54 722.87 102 732.14 150 737.72 7 716.91 55 723.00 103 732.15 151 737.86 8 717.03 56 723.12 104 732.28 152 737.90 9 717.16 57 723.25 105 732.37 1 53 737.96 10 717.29 58 723.38 106 732.47 154 738.09 11 717.41 59 723.50 107 732.60 1 55 738.19 12 717.54 60 723.63 108 732.73 156 738.33 13 717.67 61 723.76 109 732.74 157 738.47 14 717.79 62 723.89 110 732.87 158 738.61 15 717.92 63 724.01 111 733.00 1 59 738.75 16 718.05 64 724.14 112 733.13 160 738.89 17 718.18 65 724.27 113 733.26 161 739.03 18 718.30 66 724.39 114 733.33 162 739.18 19 718.43 67 724.52 115 733.46 163 739.32 20 718.56 68 724.65 116 733.59 164 739.46 21 718.68 69 724.77 117 733.72 165 739.60 22 718.81 70 725.06 118 733.76 166 739.74 23 718.94 71 725.39 119 733.90 167 739.88 24 719.06 72 725.72 120 734.03 168 740.02 25 719.19 73 726.05 121 734.16 169 740.10 26 719.32 74 726.38 122 734.29 170 740.24 27 719.44 75 726.70 123 734.42 171 740.38 28 719.57 76 727.03 124 734.56 172 740.52 29 719.70 77 727.36 125 734.69 173 740.66 30 719.82 78 727.69 126 734.82 174 740.80 31 719.95 79 728.02 127 734.95 175 740.94 32 720.08 80 728.34 128 735.08 176 741.08 33 720.21 81 728.67 129 735.22 177 741.23 34 720.33 82 729.00 130 735.35 178 741.35 35 720.46 83 729.10 131 735.43 179 741.43 36 720.59 84 729.42 132 735.56 180 741.58 37 720.71 85 729.75 133 735.70 181 741.60 38 720.84 86 730.08 134 735.83 182 741.75 A-2 ------- Specific Flow Rates from Analytic Solution at all Computational Grid Nodes (continued).. Node Number Velocity [m/yr] Node Number Velocity [m/yr] Node Number Velocity [m/yr] Node Number Velocity [m/yr] 39 720.97 87 730.40 135 735.96 183 741.77 40 721.09 88 730.45 136 736.10 184 741.85 41 721.22 89 730.57 137 736.23 185 742.00 42 721.35 90 730.70 138 736.24 186 742.16 43 721.47 91 730.83 139 736.38 187 742.31 44 721.60 92 730.96 140 736.41 188 742.46 45 721.73 93 731.08 141 736.55 189 742.61 46 721.86 94 731.20 142 736.68 190 742.70 47 721.98 95 731.33 143 736.76 191 742.85 48 722.11 96 731.46 144 736.90 192 743.01 A-3 ------- Appendix B ------- Site layout SSF for LAU at location 1632106 (Abbreviated Version) 1, "slLA1632106.ssf',''data group", 204, "AquDir",l,"FLOAT",0,"degrees", 1,168, "AquFEOX",0,"FLOAT",0,"fraction", 0.005100186766, "AquGrad",l,"FLOAT",0,"", 1.0.013, "Aquld",l,"STRING",0,"", 1,"01", "AquLOM",0,"FLOAT",0,"mg/L", 215.7726547, "AquLWSIndex",l,"INTEGER",0,"", 1.1, " AquLWS Sub Arealndex", 1," INTEGER" ,0, 1.2, "AquPh",0,"FLOAT",0,"pH units", 7.32982788, "AquSATK",l,"FLOAT",0,"m/yr", 1,56341.03694, "AquTemp",0,"FLOAT",0,"degrees Celsius", 17.5, "AquThick", 1,'"FLOAT", 0,"m", 1,6.1, "AquVadlndex", 1,"INTEGER",0,"", 1,1, "AquWellFracZ", 1,"FLOAT",0,"fraction", 118,0.1303760265,0.4498786407,0.9103182528,0.4588826075,0.3399876257,0.2920285591, 0.7839942473,0.01132040661,0.6420738755,0.07562981604,0.5503186417,0.4654157475, 0.3824716561,0.881 1273 143,0.8267783 717,0.7440995084,0.8004442546,0.1265936472, 0.5794296947,0.7148834835,0.7467134715,0.6333215199,0.9547891191,0.1407318295, 0.05985923887,0.094228117,0.5 119630832,0.6635433359,0.2728513934,0.8933701439, 0.7920153102,0.5613238677,0.2102486088,0.2683705081,0.06313142241,0.209816857, 0.8519177709,0.8819823527,0.4974082789,0.06094699285,0.7361092272,0.7677869674, 0.05556703025,0.475077848,0.09339523387,0.2336963295,0.3942108833,0.2223179226, 0.2573264802,0.6461549159,0.06567580517,0.8332579917,0.8670721536,0.7816924806, 0.5255276944,0.3039633838,0.4725941303,0.4895521982,0.3237984547,0.6406298478, 0.3058571352,0.9408732605,0.4768958497,0.2685496416,0.1338281422,0.6495863238, 0.8973490732,0.04588049138,0.3534188984,0.6314281888,0.4935739133,0.2967650001, 0.02935975878,0.02946589438,0.8332870378,0.3752499193,0.04539645486,0.05821703843, 0.9137652432,0.5724502965,0.03213778308,0.6597203416,0.6997865204,0.8320535276, 0.2236443238,0.01015139895,0.5945620796,0.2448765539,0.1402440272,0.6813658433, B-2 ------- 0.9157339689,0.3408230882,0.6136452591,0.5158737137,0.7295093025,0.5828522582, 0.4179075467,0.6121414083,0.7206537917,0.7082821551,0.5381863287,0.3976304348, 0.854721029,0.9563407066,0.7382632302,0.7101155599,0.9722209091,0.09682617999, 0.07760771798,0.4729166137,0.02953032708,0.9362073516,0.456965759,0.4635147886, 0.773055043,0.3961142485,0.8521776114,0.3491212875, "AquWellLocX",l,'"FLOAT", 0,"m", 118,-2136.137451,1555.615479,-1952.069458,-2142.320312,-1878.50708,-1728.283081, -1824.026123,-2028.638062,-2170.210938,1540.11792,-1770.554688,2052.708008, -1387.862305,-1944.950073,-2230.998291,-1727.347534,1176.8396,-2122.023193, -1893.184448,-1686.659424,-1987.536377,-1090.647949,-2051.892578,-2234.576904, -1843.018677,-1982.254028,-1791.220093,-1191.522095,-670.365051,-1396.386841, -1792.486328,-964.60321,-525.401917,-2067.012939,1937.051392,1640.464966, -622.671936,-696.989014,1351.159668,-769.020447,2150.605225,-597.051086, -651.501038,-427.009033,-903.814453,-727.071289,-579.128723,-627.788574, -704.978027,-1150.218994,-540.346191,-939.658447,-800.947876,-1110.778809, 1927.744385,-579.950317,-1049.884033,-213.7659,1606.708008,-1087.546387, -487.460266,-334.041779,1434.803101,-768.863525,-417.483368,-1013.16217, -1067.181274,-883.695801,-1084.001587,-511.095703,-423.107391,-1239.020264, -963.86377,-613.008179,-81.388252,-713.178894,1832.21521 ,-808.86322,2178.450928, -1278.977905,-289.341858,-557.533813,-962.943237,-775.348999,2023.296753, -1618.175659,-1083.27417,-264.852051,335.766388,1845.804077,-921.582153,-504.769409, -270.264404,-628.690369,1664.956055,482.726532,-733.525146,218.64624,-102.864113, 537.033325,-652.676697,-881.839539,920.733704,1695.517822,-1096.834717,-555.644897, 313.409607,819.461182,-342.328094,-50.154484,-449.662506,-500.076416,-563.826843, -409.862152,-17.540335,-1512.812256,-714.187256,-1197.937256, "AquWellLocY",l,"FLOAT",0,"m", 118,601.23999,883.325012,516.953735,402.157654,369.864471,313.876221,267.933502, 234.034409,216.029999,546.487061,162.629517,486.563293,156.033585,75.774521, 26.046474,65.6563 19,3 10.93927,-25.91 1 165,-29.926208,-35.338997,-89.772972,-5.768955, -102.199707,-163.244232,-130.559479,-223.236328,-236.243454,-211.364899,-186.098618, -262.839111,-308.061127,-268.588867,-228.124161,-379.160461,-20.20853,-55.541386, -272.806366,-295.947601,-117.581886,-330.572662,-69.71711,-353.727142,-380.049835, -365.48526,-414.165802,-405.68277,-399.299622,-427.381104,-460.693298,-513.398315, -471.371277,-509.89975,-506.58963,-541.575073,-252.712875,-508.201294,-555.49353, -478.043976,-331.519165,-596.572937,-542.743042,-531.158264,-377.132843,-590.613647, -563.962952,-624.061279,-631.492432,-616.407227,-649.13562,-621.453674,-620.206299, -710.396484,-693.663757,-667.203918,-631.022705,-713.916626,-505.235657,-759.765747, -491.919861,-839.51178,-746.051575,-776.996704,-860.099792,-845.699585,-620.374817, -1005.274292,-966.489563,-993.795532,-1003.183105,-883.719971,-1243.506104, -1204.806396,-1202.813232,-1260.419678,-1108.867188,-1232.152588,-1404.12085, -1318.044678,-1349.489624,-1331.11438,-1512.562134,-1551.493774,-1468.519775, -1405.713135,-1738.098511,-1744.164673,-1784.509155,-1757.613525,-1943.339844, -1916.407227,-2031.823975,-2054.631836,-2066.664062,-2154.0625,-2178.894287, -1044.25,-1644.5,-1755.25, B-3 ------- "Num AquWell", 0, "INTEGER" ,0, 118, "NyrMax",0,"INTEGER",0,"years", 10000, "SrcArea",0,"FLOAT",0,"mA2", 109269, "SrcLocX",0,"FLOAT",0,"m", 0, "SrcLocY",0,"FLOAT",0,"m", 0, " SrcLWSNumSub Area", 1, "INTEGER",0,"", 1,3, "SrcLWSSubAreaArea",2,"FLOAT",0,"m2", 1, 3,204854.0152,109269,280882.4974, "SrcLWSSubArealndex", 1, "INTEGER",0,"unitless", 1,2, "TermFrac",0,"FLOAT",0, "fraction", 0.01, "WBNRchAquIndex",3,"INTEGER",0,"", 2,2, 1,0, 1,0, 4, 1,0, 1.0, 1.1, 1,0, "WBNRchBody Type",2,"STRING",0,"", 2, 2," stream"," stream", 4," stream"," stream"," stream"," 1 ake", "WBNRchLength",2,"FLOAT",0,"m", 2, 2,202.9729872,1993.1 13791, 4,153.914739,1 186.1 12184,1326.526364,0, "WBNRchLocX",3,"FLOAT",0,"m", 2.2, 3,-1899.656006.-1899.656006.-1799.656006, 25,-1699.656006,-1599.656006,-1699.656006,-1599.656006,-1699.656006,-1699.656006, -1699.656006,-1599.656006,-1599.656006,-1599.656006,-1799.656006,-1599.656006, -2199.656006,-1799.656006,-1799.656006,-1799.656006,-1799.656006,-1799.656006, -1799.656006,-1799.656006,-1899.656006,-1999.656006,-2099.656006,-1699.656006, -1699.656006, 4, B-4 ------- 2,1700.343994,1700.343994, 18,1400.343994,1700.343994,1600.343994,1600.343994,1500.343994,1500.343994, 1400.343994,1100.343994,1700.343994,1200.343994,1100.343994,1000.343994, 1000.343994,900.343994,900.343994,800.343994,1300.343994,1100.343994, 20,600.343994,500.343994,500.343994,600.343994,700.343994,700.343994,800.343994, 400.343994,800.343994,300.343994,300.343994,200.343994,-99.655998,200.343994, 700.343994,100.344002,100.344002,0.344,-99.655998,400.343994, 8,500.343994,600.343994,600.343994,500.343994,500.343994,400.343994,400.343994, 600.343994, "WBNRchLocYM,3,MFLOATM,0,Mm", 2,2, 3'l000.25,1100.25,1000.25, 25,400.25,200.25,-299.75,100.25,200.25,300.25,500.25,-299.75,-199.75,0.25,1000.25, -99.75,-599.75,900.25,800.25,700.25,600.25,500.25,-499.75,-599.75,-599.75,-599.75, -599.75,-399.75,-499.75, 4, 2,1400.25,1300.25, 18,900.25,1200.25,1200.25,1100.25,1100.25,1000.25,1000.25,700.25,1300.25,900.25, 800.25,700.25,600.25,600.25,500.25,500.25,900.25,900.25, 20,100.25,0.25,100.25,200.25,300.25,400.25,400.25,0.25,500.25,-99.75,-199.75, -199.75,-499.75,-299.75,200.25,-299.75,-399.75,-399.75,-399.75,-99.75, 8,-399.75,-299.75,-399.75,-299.75,-499.75,-399.75,-499.75,-499.75, "WBNRchNumLoc", 2,'"INTEGER", 0,"unitless", 2, 2,3,25, 4,2,18,20,8, B-5 ------- Aquifer module SSF for LAU at location 1632106 1, "aq01.ssf',"data group", 7, "AL",0,"FLOAT", 67.69626174, "ALATRatio",0,"FLOAT",0,"m", 8, "ALAVRatio",0,"FLOAT",0,"m", 160, "ANIST",0,"FLOAT",0,"", 8.750763722, "BDENS",0,"FLOAT",0,"g/cm3", 1.36628892, "FOC",0,"FLOAT",0, "fraction", 0.0002662181753, "POR",0,"FLOAT",0,"", 0.2227625536, B-6 ------- Vadose module GRF for LAU at location 1632106 1, "vzLA1632106.gif","data group", 5, "CWT",2,"FLOAT",0,"mg/L", 173, 1,22.36890966, 1,39.00109526, 1,47.0446458, 1,48.57814591, 1,42.95779018, 1,35.23843565, 1,30.87357271, 1,29.20798116, 1,27.64090362, 1,25.59666415, 1,24.2919035, 1,23.78850597, 1,23.70241589, 1,23.81229737, 1,23.9216849, 1,23.97199225, 1,24.00390983, 1,24.07308144, 1,24.13981531, 1,24.17477486, 1,24.34086169, 1,25.33193363, 1,26.63601227, 1,27.38593289, 1,27.84939825, 1,30.24234868, 1,34.45784343, 1,37.32593903, 1,38.39789272, 1,36.841 15399, 1,31.9360437, 1,27.79898809, 1,25.94694529, 1,25.58961 15, 1,26.36072025, 1,27.29595788, 1,27.78067878, 1,27.81267454, 1,26.91882599, B-7 ------- 1,25.62589663, 1,24.85536285, 1,24.73422527, 1,26.86571158, 1,31.11989116, 1,34.13544414, 1,35.32253928, 1,34.30315915, 1,30.46114123, 1,27.07024998, 1,25.51809562, 1,25.17498312, 1,25.75121691, 1,26.48920343, 1,26.89363845, 1,27.30105491, 1,29.47239434, 1,32.646955, 1,34.56591862, 1,35.24488887, 1,34.7062848, 1,33.20171547, 1,32.10980307, 1,31.65297244, 1,33.19762558, 1,38.25702456, 1,42.85636283, 1,45.04602094, 1,44.59137747, 1,39.44042521, 1,33.14695739, 1,29.82346854, 1,28.71212891, 1,29.07248027, 1,29.99229925, 1,30.68663753, 1,30.86437793, 1,31.13066454, 1,31.50410645, 1,31.69246952, 1,31.87951019, 1,31.42009145, 1,29.91889968, 1,28.6773662, 1,27.80437663, ------- 1,29.02242317 1,35.60053783 1,43.76100257 1,48.52765429 1,49.36835476 1,45.08399176 1,36.94609622 1,31.48760156 1,29.6508927, 1,28.00256903 1,26.06257439 1,24.55076997 1,23.77765916 1,23.75584786 1,23.74436671 1,23.84444071 1,24.0475446, 1,23.94434684 1,24.03890525 1,24.20283704 1,24.0972127, 1,24.21104162 1,25.11600953 1,26.33210958 1,27.1536944, 1,27.70705431 1,29.54848568 1,33.20928936 1,36.88667594 1,38.55022515 1,37.23699806 1,33.36636059 1,28.76161776 1,25.96837189 1,25.60397614 1,26.18410806 1,27.02178367 1,27.62761763 1,27.88040675 1,27.34374745 1,25.97508126 1,24.72655851 1,24.78694182 1,26.28666069 1,29.70361557 ------- 1,33.73234449, 1,35.48213237, 1,34.57252044, 1,31.50713503, 1,27.91669083, 1,25.58616735, 1,25.02299694, 1,25.72284527, 1,26.61066097, 1,26.50627836, 1,27.08545475, 1,29.12656996, 1,31.80269075, 1,34.07177587, 1,35.24212984, 1,34.93613056, 1,33.63663659, 1,32.24645227, 1,31.60335204, 1,32.94239087, 1,36.53456133, 1,41.59073109, 1,45.4345508, 1,44.95033844, 1,40.48332853, 1,34.99748282, 1,30.31925208, 1,28.5978351, 1,29.1064561, 1,30.18493116. 1,30.27625647, 1,30.47067322, 1,31.00683465, 1,31.82783392, 1,31.71658189, 1,31.60496849, 1,30.91744819, 1,30.33700697, 1,29.69250859, 1,28.69647072, 1,25.94758874, 1,19.64863559, 1,11.42898124, 1,4.355820081, "NTS", 0,'"INTEGER", 0,"yr", B-10 ------- 173, "SINFIL",0,"FLOAT",0,"m/yr", 0.4587217252, "TSOURC",0,"FLOAT",0,"yr", 41, "TWT",1,"FLOAT",0,"yr", 173,1,1.2346257,1.4692514,1.7038771,1.9385028,2.1731285,2.4077542,2.6423799, 2.8770056,3.1116313,3.346257,3.5808827,3.8155084,4.0501341,4.2847598,4.5193855, 4.7540112,4.9886369,5.2232626,5.4578883,5.692514,5.9271397,6.1617654,6.396391 1, 6.6310168,6.8656425,7.1002682,7.3348939,7.5695196,7.8041453,8.038771,8.2733967, 8.5080224,8.7426481,8.9772738,9.2118995,9.4465252,9.681 1509,9.9157766,10.1504023, 10.385028,10.6196537,10.8542794,11.088905 1,1 1.3235308,1 1.5581565,11.7927822, 12.0274079,12.2620336,12.4966593,12.731285,12.9659107,13.2005364,13.4351621, 13.6697878,13.9044135,14.1390392,14.3736649,14.6082906,14.8429163,15.077542, 15.3121677,15.5467934,15.7814191,16.0160448,16.2506705,16.4852962,16.7199219, 16.9545476,17.1891733,17.423799,17.6584247,17.8930504,18.1276761,18.3623018, 18.5969275,18.8315532,19.0661789,19.3008046,19.5354303,19.770056,20.0046817, 20.2393074,20.4739331,20.7085588,20.943 1845,21.1778102,21.4124359,21.6470616, 21.8816873,22.116313,22.3509387,22.5855644,22.8201901,23.0548158,23.2894415, 23.5240672,23.7586929,23.9933186,24.2279443,24.46257,24.6971957,24.9318214, 25.1664471,25.4010728,25.6356985,25.8703242,26.1049499,26.3395756,26.5742013, 26.808827,27.0434527,27.2780784,27.5127041,27.7473298,27.9819555,28.2165812, 28.4512069,28.6858326,28.9204583,29.155084,29.3897097,29.6243354,29.8589611, 30.0935868,30.3282125,30.5628382,30.7974639,3 1.0320896,3 1.2667153,3 1.501341, 31.7359667,31.9705924,32.2052181,32.4398438,32.6744695,32.9090952,33.1437209, 33.3783466,33.6129723,33.847598,34.0822237,34.3168494,34.5514751,34.7861008, 35.0207265,35.2553522,35.4899779,35.7246036,35.9592293,36.193855,36.4284807, 36.6631064,36.8977321,37.1323578,37.3669835,37.6016092,37.8362349,38.0708606, 38.3054863,38.5401 12,38.7747377,39.0093634,39.2439891,39.4786148,39.7132405, 39.9478662,40.1824919,40.4171 176,40.65 17433,40.886369,41.1209947,41.3556204, B-ll ------- Appendix C ------- Pre-processed Water Table Concentrations Time vz.grf Pulse Time On Pulse Time Off Approximate Square Pulse Concentration 1 22.369 1 1.23463 30.685 1.2346 39.001 1.23463 1.46925 43.023 1.4693 47.045 1.46925 1.70388 47.811 1.7039 48.578 1.70388 1.9385 45.768 1.9385 42.958 1.9385 2.17313 39.098 2.1731 35.238 2.17313 2.40775 33.056 2.4078 30.874 2.40775 2.64238 30.041 2.6424 29.208 2.64238 2.87701 28.424 2.877 27.641 2.87701 3.11163 26.619 3.1116 25.597 3.11163 3.34626 24.944 3.3463 24.292 3.34626 3.58088 24.040 3.5809 23.789 3.58088 3.81551 23.745 3.8155 23.702 3.81551 4.05013 23.757 4.0501 23.812 4.05013 4.28476 23.867 4.2848 23.922 4.28476 4.51939 23.947 4.5194 23.972 4.51939 4.75401 23.988 4.754 24.004 4.75401 4.98864 24.038 4.9886 24.073 4.98864 5.22326 24.106 5.2233 24.14 5.22326 5.45789 24.157 5.4579 24.175 5.45789 5.69251 24.258 5.6925 24.341 5.69251 5.92714 24.836 5.9271 25.332 5.92714 6.16177 25.984 6.1618 26.636 6.16177 6.39639 27.011 6.3964 27.386 6.39639 6.63102 27.618 6.631 27.849 6.63102 6.86564 29.046 6.8656 30.242 6.86564 7.10027 32.350 7.1003 34.458 7.10027 7.33489 35.892 7.3349 37.326 7.33489 7.56952 37.862 7.5695 38.398 7.56952 7.80415 37.620 7.8041 36.841 7.80415 8.03877 34.389 8.0388 31.936 8.03877 8.2734 29.868 8.2734 27.799 8.2734 8.50802 26.873 8.508 25.947 8.50802 8.74265 25.768 8.7426 25.59 8.74265 8.97727 25.975 8.9773 26.361 8.97727 9.2119 26.828 9.2119 27.296 9.2119 9.44653 27.538 9.4465 27.781 9.44653 9.68115 27.797 9.6812 27.813 9.68115 9.91578 27.366 9.9158 26.919 9.91578 10.1504 26.272 10.15 25.626 10.1504 10.385 25.241 10.385 24.855 10.385 10.6197 24.795 C-2 ------- Pre-processed Water Table Concentrations (continued) Time vz.grf Pulse Time On Pulse Time Off Approximate Square Pulse Concentration 10.62 24.734 10.6197 10.8543 25.800 10.854 26.866 10.8543 11.0889 28.993 11.089 31.12 11.0889 11.3235 32.628 11.324 34.135 11.3235 11.5582 34.729 11.558 35.323 11.5582 11.7928 34.813 11.793 34.303 11.7928 12.0274 32.382 12.027 30.461 12.0274 12.262 28.766 12.262 27.07 12.262 12.4967 26.294 12.497 25.518 12.4967 12.7313 25.347 12.731 25.175 12.7313 12.9659 25.463 12.966 25.751 12.9659 13.2005 26.120 13.201 26.489 13.2005 13.4352 26.691 13.435 26.894 13.4352 13.6698 27.097 13.67 27.301 13.6698 13.9044 28.387 13.904 29.472 13.9044 14.139 31.060 14.139 32.647 14.139 14.3737 33.606 14.374 34.566 14.3737 14.6083 34.905 14.608 35.245 14.6083 14.8429 34.976 14.843 34.706 14.8429 15.0775 33.954 15.078 33.202 15.0775 15.3122 32.656 15.312 32.11 15.3122 15.5468 31.881 15.547 31.653 15.5468 15.7814 32.425 15.781 33.198 15.7814 16.016 35.727 16.016 38.257 16.016 16.2507 40.557 16.251 42.856 16.2507 16.4853 43.951 16.485 45.046 16.4853 16.7199 44.819 16.72 44.591 16.7199 16.9545 42.016 16.955 39.44 16.9545 17.1892 36.294 17.189 33.147 17.1892 17.4238 31.485 17.424 29.823 17.4238 17.6584 29.268 17.658 28.712 17.6584 17.8931 28.892 17.893 29.072 17.8931 18.1277 29.532 18.128 29.992 18.1277 18.3623 30.339 18.362 30.687 18.3623 18.5969 30.776 18.597 30.864 18.5969 18.8316 30.998 18.832 31.131 18.8316 19.0662 31.317 19.066 31.504 19.0662 19.3008 31.598 19.301 31.692 19.3008 19.5354 31.786 19.535 31.88 19.5354 19.7701 31.650 19.77 31.42 19.7701 20.0047 30.669 20.005 29.919 20.0047 20.2393 29.298 20.239 28.677 20.2393 20.4739 28.241 20.474 27.804 20.4739 20.7086 28.413 20.709 29.022 20.7086 20.9432 32.311 C-3 ------- Pre-processed Water Table Concentrations (continued) Time vz.grf Pulse Time On Pulse Time Off Approximate Square Pulse Concentration 20.943 35.601 20.9432 21.1778 39.681 21.178 43.761 21.1778 21.4124 46.144 21.412 48.528 21.4124 21.6471 48.948 21.647 49.368 21.6471 21.8817 47.226 21.882 45.084 21.8817 22.1163 41.015 22.116 36.946 22.1163 22.3509 34.217 22.351 31.488 22.3509 22.5856 30.569 22.586 29.651 22.5856 22.8202 28.827 22.82 28.003 22.8202 23.0548 27.033 23.055 26.063 23.0548 23.2894 25.307 23.289 24.551 23.2894 23.5241 24.164 23.524 23.778 23.5241 23.7587 23.767 23.759 23.756 23.7587 23.9933 23.750 23.993 23.744 23.9933 24.2279 23.794 24.228 23.844 24.2279 24.4626 23.946 24.463 24.048 24.4626 24.6972 23.996 24.697 23.944 24.6972 24.9318 23.992 24.932 24.039 24.9318 25.1664 24.121 25.166 24.203 25.1664 25.4011 24.150 25.401 24.097 25.4011 25.6357 24.154 25.636 24.211 25.6357 25.8703 24.664 25.87 25.116 25.8703 26.1049 25.724 26.105 26.332 26.1049 26.3396 26.743 26.34 27.154 26.3396 26.5742 27.430 26.574 27.707 26.5742 26.8088 28.628 26.809 29.548 26.8088 27.0435 31.379 27.043 33.209 27.0435 27.2781 35.048 27.278 36.887 27.2781 27.5127 37.718 27.513 38.55 27.5127 27.7473 37.894 27.747 37.237 27.7473 27.982 35.302 27.982 33.366 27.982 28.2166 31.064 28.217 28.762 28.2166 28.4512 27.365 28.451 25.968 28.4512 28.6858 25.786 28.686 25.604 28.6858 28.9205 25.894 28.92 26.184 28.9205 29.1551 26.603 29.155 27.022 29.1551 29.3897 27.325 29.39 27.628 29.3897 29.6243 27.754 29.624 27.88 29.6243 29.859 27.612 29.859 27.344 29.859 30.0936 26.659 30.094 25.975 30.0936 30.3282 25.351 30.328 24.727 30.3282 30.5628 24.757 30.563 24.787 30.5628 30.7975 25.537 30.797 26.287 30.7975 31.0321 27.995 31.032 29.704 31.0321 31.2667 31.718 C-4 ------- Pre-processed Water Table Concentrations (continued) Time vz.grf Pulse Time On Pulse Time Off Approximate Square Pulse Concentration 31.267 33.732 31.2667 31.5013 34.607 31.501 35.482 31.5013 31.736 35.027 31.736 34.573 31.736 31.9706 33.040 31.971 31.507 31.9706 32.2052 29.712 32.205 27.917 32.2052 32.4398 26.751 32.44 25.586 32.4398 32.6745 25.305 32.674 25.023 32.6745 32.9091 25.373 32.909 25.723 32.9091 33.1437 26.167 33.144 26.611 33.1437 33.3783 26.558 33.378 26.506 33.3783 33.613 26.796 33.613 27.085 33.613 33.8476 28.106 33.848 29.127 33.8476 34.0822 30.465 34.082 31.803 34.0822 34.3168 32.937 34.317 34.072 34.3168 34.5515 34.657 34.551 35.242 34.5515 34.7861 35.089 34.786 34.936 34.7861 35.0207 34.286 35.021 33.637 35.0207 35.2554 32.942 35.255 32.246 35.2554 35.49 31.925 35.49 31.603 35.49 35.7246 32.273 35.725 32.942 35.7246 35.9592 34.738 35.959 36.535 35.9592 36.1939 39.063 36.194 41.591 36.1939 36.4285 43.513 36.428 45.435 36.4285 36.6631 45.192 36.663 44.95 36.6631 36.8977 42.717 36.898 40.483 36.8977 37.1324 37.740 37.132 34.997 37.1324 37.367 32.658 37.367 30.319 37.367 37.6016 29.459 37.602 28.598 37.6016 37.8362 28.852 37.836 29.106 37.8362 38.0709 29.646 38.071 30.185 38.0709 38.3055 30.231 38.305 30.276 38.3055 38.5401 30.373 38.54 30.471 38.5401 38.7747 30.739 38.775 31.007 38.7747 39.0094 31.417 39.009 31.828 39.0094 39.244 31.772 39.244 31.717 39.244 39.4786 31.661 39.479 31.605 39.4786 39.7132 31.261 39.713 30.917 39.7132 39.9479 30.627 39.948 30.337 39.9479 40.1825 30.015 40.182 29.693 40.1825 40.4171 29.194 40.417 28.696 40.4171 40.6517 27.322 40.652 25.948 40.6517 40.8864 22.798 40.886 19.649 40.8864 41.121 15.539 41.121 11.429 41.121 41.3556 7.892 41.356 4.3558 C-5 ------- FIGURES ------- 5.00E+01 4.50E+01 4.00E+01 3.50E+01 3.00E+01 2.50E+01 2.00E+01 1.50E+01 1.00E+01 5.00E+00 O.OOE+OO 0 5 10 15 20 25 30 35 40 45 50 Time (yr) —x—Verify —a—Module Figure 1. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 257, for Well 58. Fig-1 ------- 5.00E+01 4.50E+01 4.00E+01 3.50E+01 B> 3.00E+01 2.50E+01 2.00E+01 1.50E+01 1.00E+01 5.00E+00 O.OOE+OO 0 5 10 15 20 25 30 35 40 45 50 Time (yr) Figure 2. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 504, for Well 81. Fig-2 ------- 5.00E+01 4.50E+01 4.00E+01 3.50E+01 d 3.00E+01 O) E. c I 2.50E+01 c 0) o o 2.00E+01 o 1.50E+01 1.00E+01 5.00E+00 0.00E+00 10 15 20 25 Time (yr) 30 35 40 45 50 -A—Verify —x—Module Figure 3. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 955, for Well 93. Fig-3 ------- 60 50 40 30 20 0 0 5 10 15 20 25 30 35 40 45 50 Time (yr) -A—Verify —x—Module Figure 4. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 1462, for Well 103 Fig-4 ------- 50 45 40 35 _i a) 30 25 20 5 0 0 5 10 15 20 25 30 35 40 45 50 Time (yr) -A—Verify —x—Module Figure 5. Centerline Breakthrough Curve for HWIR99 And Verification Modules, X = 1962, for Well 115. Fig-5 ------- 2.5E+06 2.0E+06 1.5E+06 1.0E+06 5.0E+05 O.OE+OO Time (y) "Surface Body Verify ~ Surface Body Module Figure 6. Surface Water Body Verification Fig-6 ------- 1.4E-04 1.2E-04 1.0E-04 p 8.0E-05 6.0E-05 4.0E-05 2.0E-05 O.OE+OO 10 15 20 25 Time (yr) 30 35 40 45 "Well 58 Verify -B-Well 58 Module Figure 7 Breakthrough Curves for HWIR99 and Verification Modules at Well 58. Fig-7 50 ------- 3.0E-05 2.5E-05 2.0E-05 1.5E-05 1.0E-05 5.0E-06 O.OE+OO 0 5 10 15 20 25 30 35 40 45 50 Time (yr) —A—Well 81 Verify Well 81 Module Figure 8 Breakthrough Curves for HWIR99 and Verification Modules at Well 81. Fig-8 ------- 2.0E-04 1.8E-04 1.6E-04 1.4E-04 5 1.2E-04 5) E C 0 % 1.0E-04 l. +J C 0) o ,5 8.0E-05 6.0E-05 4.0E-05 2.0E-05 0.0E+00 0 5 10 15 20 25 30 35 40 45 50 Time (yr) Well 93 Verify -*-Well 93 Module Figure 9 Breakthrough Curves for HWIR99 and Verification Modules at Well 91. Fig-9 ------- 3.0E-04 2.5E-04 2.0E-04 O) E. £ 0 '¦g 1.5E-04 L_ +J c o o c 0 o 1.0E-04 5.0E-05 O.OE+OO Figure 10 10 15 20 25 Time (yr) 30 35 "Well 103 Verify -*-Well 103 Module Breakthrough Curves for HWIR99 and Verification Modules at Well 103. Fig-10 40 45 50 ------- 9.0E-03 .0E-03 7.0E-03 6.0E-03 5.0E-03 » 4.0E-03 3.0E-03 2.0E-03 1.0E-03 O.OE+OO 0 5 10 15 20 25 30 35 40 45 50 Time (yr) -A-Well 115 Verify -*-Well 115 Module Figure 11 Breakthrough Curves for HWIR99 and Verification Modules at Well 115. Fig-11 ------- |