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TABLE 2 <br /> First Semester 2012 Leachate Field Measurements <br /> North County Recycling Center and Sanitary Landfill <br /> Total Volume Average Flow Rate <br /> Module I al/day) <br /> .................. <br /> January 6.30 4,030 16,030 411 <br /> --February 6.70 3,891 11,380 356 <br /> March 6.55 3,630 10,300 468 <br /> April 6.59 4,018 9,630 370 <br /> May 6.33 4,364 9,660 333 <br /> June 6.61 4,077 10,810 349 <br /> ............................._ <br /> Semester average leachate collection rate: 381 <br /> Total Volume Average Flow Rate <br /> Module 3 __p E.C. (pmhos/cm) 119 s ay <br /> January 6.05 2,090 791 20 <br /> February 6.37 2,188 16,979 531 <br /> March 6.72 2,342 8,630 392 <br /> ................ ............................................. <br /> April 6.28 2,035 7,005 269 <br /> .............. <br /> May 5.73 2,016 6,765 233 <br /> June 6.75 2,386 8,190 264. <br /> qW ................................... <br /> ....­___ <br /> - .. --------- <br /> Semester average leachate collection rate: 285 <br /> Total Volume Average Flow Rate <br /> Module 4 a <br /> January 6.25 2680 2913 75 <br /> .........................................I............ <br /> February 6.68 2265 9018 282 <br /> ... ....................................... <br /> March 6.62 2655 3758 171 <br /> ................... <br /> April 6.61 1996 4525 174 <br /> .................... <br /> May 6.43 2466 7077 244 <br /> ............................. <br /> June 6.64 2310 5970 193 <br /> ............__....................... <br /> Semester average leachate collection rate: 190 <br /> ...................... <br /> All leachate was successfully returned to the refuse at least 40 feet above the LCRS, allowing dryer <br /> refuse to absorb the leachate. <br /> Average leachate collection rates for the Modules are approximately proportional to the areas of the <br /> Modules: Module 1 is approximately twice the area of Modules 3 and 4. <br /> A comparison of the leachate monitoring data to groundwater monitoring data shows that leachate <br /> generally contains significantly higher TDS, Electrical Conductivity, and Chloride than groundwater. <br /> Leachate is also slightly more acidic than groundwater. <br /> North County RC&SL Public Works/Solid Waste <br /> 15'Semester 2012 Groundwater Monitoring 8 County of San Joaquin—July 26,2012 <br />