Laserfiche WebLink
TECHNICAL MEMORANDUM <br />Evaluation of Bed Ash Disposal <br />Forward Landfill <br />San Joaquin, California <br />November 1, 2016 <br />Page 11 <br />function of low leakage rates and the relatively thick vadose zone between the bottom of the <br />landfill and the groundwater table. Based on these findings, it can reasonably be concluded that <br />the potential leaching of copper from the bed ash and subsequent leakage (should it occur) would <br />have no measurable effect on groundwater quality below or adjacent to the site. <br />SUMMARY OF MULTIMED EVALUATION RESULTS <br />ITEM <br />UNITS I <br />AREA 1 1 <br />AREA 2 1 <br />AREA 3 <br />AREA 4 <br />Alternative 1 (Larger Area, Higher Leakage, Shorter Source Duration) <br />Predicted Maximum Well Concentration <br />mg/L I <br />1.77E-07 <br />5.60E-07 <br />4.08E-08 <br />8.21E-09 <br />Transient Dilution Attenuation Factor <br />Time Required to Reach Maximum <br />no units <br />yrs <br />1.81E+08 <br />22,000 <br />5.72E+07 <br />11,600 <br />7.73E+08 <br />20,600 <br />6.21E+09 <br />41,200 <br />Typical Method 6010 Detection Limit for Copper <br />mg/L <br />0.0011 <br />0.0011 <br />0.0011 <br />0.0011 <br />Concentration Z Method 6010 Method Detection Limit <br />no units <br />NO <br />NO <br />NO <br />NO <br />Multiple Required for Detection <br />no units <br />6,211 <br />1,965 <br />26,981 <br />133,983 <br />Alternative 2 (Smaller Area, Lower Leakage, Longer Source Duration) <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 />_ <br />Transient Dilution Attenuation Factor <br />Time Required to Reach Maximum <br />no units <br />yrs <br />5.86E+10 <br />679,000 <br />3.09E+10 <br />679,000 <br />1.09E+12 <br />2,570,000 <br />7.37E+13 <br />14,000,000 <br />Typical Method 6010 Detection Limit for Copper <br />0.0011 <br />0.0011 <br />0.0011 <br />0.0011 <br />Concentration z Method 6010 Method Detection Limit <br />-mg/L <br />no units <br />NO <br />NO <br />NO <br />NO <br />Multiple Required for Detection <br />no units <br />2,015,390 <br />1 1,062,802 <br />137,931,0341 1,589,136,088 <br />