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Table SB <br />SUMMARY OF <br />MULTIMED INPUT PARAMETERS AND RESULTS <br />DISPOSAL <br />ALTERNATIVE 2 <br />Forward Landfill, San <br />Joaquin County, California <br />PARAMETER <br />UNITS <br />AREA 1 <br />AREA 2 <br />AREA 3 <br />AREA 4 <br />BASIS <br />Layer 1 <br />no units <br />1.09 <br />109 <br />1.09 <br />1.09 <br />Based on Sharp -Hansen et al. (1990) Table 6-5 value for silty clay <br />Layer 2 <br />no units <br />2.68 <br />2.6_8_ <br />2.68 <br />2.68 <br />Based on Sharp -Hansen et al. (1990) Table 65 value for sand <br />Organic Matter <br />_ _ <br />Layer 1_ _. _ <br />percent <br />0 <br />0 <br />0 <br />0 <br />Conservative assumption (does not allow model attenuation) <br />Layer 2_. <br />_ percent <br />0 <br />-- 0 <br />0 <br />0 <br />Conservative assum tion does not allow model attenuation <br />P ( a_. ) <br />Bulk Density. __ <br />- <br />- <br />- --- <br />--__- el <br />Layer 1 <br />g/cm' <br />1.8 <br />1.8 <br />1.8 <br />1.8 <br />Site data (dry soil) <br />Layer <br />g/cm3 <br />1.7 <br />1.7 <br />1.7 <br />1.7 <br />Median site data (dry soil) <br />Biological Decay Coefficient. ---- <br />-- -- <br />--- - <br />- <br />_ <br />.-_._. <br />Layer 1 <br />1/yr <br />0 <br />0 <br />0 <br />0 <br />Conservative assumption (not significant for copper) <br />La er 2 <br />1/yr <br />0 <br />0 <br />0 <br />0 <br />Conservative assumption not significant for copper) <br />Groundwater <br />Trans <br />ort Parameters <br />Aquifer Thickness <br />_ in <br />12.2 <br />12.2 <br />12.2 <br />12.2 <br />Site data (Andrew Eng/Herst Revised EFS and Annual Corrective Action Reports) <br />Effective Porosity <br />no units <br />0.35 <br />0.35 <br />0.35 <br />0.35 <br />Site data or estimate for uppermost saturated zone <br />Bulk Density---- <br />g/cm3 <br />1.7 <br />1.7 <br />1.7 <br />1.7 <br />Median site data (dry soil) <br />Mixing Zone Thickness <br />m <br />Derived <br />Derived <br />Derived <br />Derived <br />Derived by Model <br />Mean Particle Diameter <br />cm <br />0.02 <br />0.02 <br />0 02 <br />0.02 <br />Averasite grain size data <br />Hydraulic Conductivity _ <br />m/yr <br />1.89E+03 <br />1.89E+03 <br />1.89E+03 <br />1.89E+03 <br />Based on Victor formation slug tests (2E-02 to 2E-03 cm/sec) <br />Gradient <br />m/m <br />0.002 <br />ozo2 <br />_ 0.002 <br />0.002 <br />Median site data (see Figure 1) <br />Seepage Velocity <br />m/yr, <br />Derived <br />Derived <br />Derived <br />Derived <br />Calculated by Model <br />Retardation Coefficient <br />no units <br />Derived <br />Derived <br />Derived <br />Derived <br />Derived by Model <br />Vertical Dispersivity _. <br />m <br />Derived <br />_ <br />Derived <br />Derived <br />Derived <br />Derived by Model <br />Transverse Dispersivity _ <br />in <br />Derived <br />Derived <br />Derived <br />Derived <br />Derived by Model <br />Aquifer Temperature <br />°C <br />19 <br />19 <br />19 <br />19 <br />Average site monitoring data <br />pH <br />units <br />7.3_ <br />7.3 <br />7.3 <br />7.3 <br />Median site monitoring data <br />Fraction Organic Carbon <br />nunits <br />0 <br />0 <br />0 <br />0 <br />Conservative assumption (does not allow model attenuation) <br />Radial Distance to Well <br />m <br />213 <br />165 <br />332 <br />205 <br />Measure from center of assumed disposal area to closest downgradient monitoring well <br />ogle Off Gradien- <br />t Axis <br />degrees <br />0 <br />0 <br />0 <br />-1 <br />0 <br />Assumed to be directly downgradient from the source <br />j <br />Well Screen Depth Fraction <br />I no units <br />0.23 <br />0.23 <br />0.50 <br />0.50 <br />Site-specific ratio of screen length to depth of uppermost saturated zone <br />Results <br />Predicted Maximum Well Concentration <br />mg/L <br />5.46E-10 <br />1.04E-09 <br />2.90E-11 <br />6.92E-13 <br />Transient Dilution Attenuation Factor <br />no units <br />5.86E+10 <br />3.09E+SO <br />1.09E+12 <br />7.37E+13 <br />Ratio Initial Concentration:Detected Concentration <br />Time Required to Reach Maximum <br />yrs <br />679,000 <br />679,000 <br />2,570,000 <br />14,000,000 <br />ical Copper, Detection Limit <br />mg/L <br />0.0011 <br />_ <br />0.0011 <br />0.0011 <br />Detectable <br />no units <br />_ <br />NO <br />.0.0011 <br />NO <br />NO <br />NO <br />Mufti le Required for Detection <br />no units <br />- 2,015,390 <br />1,062,802 <br />37,931034 <br />1,589,136,088 <br />