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FOURTH QUARTER 2006 GROUNDWATER TREATMENT FACILITY MONITORING REPORT <br /> FORWARD LANDFILL WDR ORDER NO.R5-2003-0080 <br /> TABLE 2 <br /> Effluent Monitoring Results <br /> Fourth Quarter 2006 Groundwater Treatment Facility Monitoring Report,Forward Landfill WDR Order No.R5-2003-0080 <br /> Analysis Date Parameters Units Results <br /> Field Parametersa <br /> 10/12/06 pH pH units 7.8 <br /> Conductivity µmhos/cm 1,010 <br /> 11/16/06 pH pH units 8.1 <br /> Conductivity µmhos/cm 1,060 <br /> 12/14/06 pH pH units 7.9 <br /> Conductivity µmhos/cm 981 <br /> Laboratory Analysesh <br /> 10/12/06` All VOCs pg/L ND(ND)° <br /> Total Dissolved Solids milligrams per liter 553 <br /> 11/16/06° All VOCs pg/L ND <br /> Antimony pg/L 2.8 Je <br /> Barium pg/L 260 <br /> Boron pg/L 316 <br /> Calcium pg/L 85,900 <br /> Chromium pg/L 2.2 J` <br /> Iron pg/L 26.4 J9 <br /> Magnesium pg/L 43,400 <br /> Manganese pg/L 615 <br /> Mercury pg/L 0.099 Jh <br /> Nickel pg/L 4.1 JI <br /> Potassium pg/L 6,700 <br /> Sodium pg/L 50,600 <br /> Thallium pg/L 2.3 J' <br /> Vanadium pg/L 14.9 <br /> 12/14/06` All VOCs pg/L ND <br /> aField parameters were analyzed using a calibrated Horiba U-10 water quality meter. <br /> b/OCs were analyzed using U.S. Environmental Protection Agency(USEPA)Method SW8260B.Total <br /> dissolved solids were analyzed using USEPA Method 160.1.Dissolved inorganics were analyzed using <br /> USEPA Method SW6010B.The dissolved inorganics sample was filtered and digested by the laboratory prior to <br /> analysis. <br /> `Both extraction wells were operational when this sample was collected. <br /> °Results shown in parentheses are for a field duplicate sample. <br /> eThe method detection limit(MDL)and practical quantitation limit(PQL)for antimony are 1.84 and 5 pg/L, <br /> respectively. <br /> fThe MDL and PQL for chromium are 1.37 and 5 pg/L,respectively. <br /> 'The MDL and PQL for iron are 25.8 and 50 pg/L, respectively. <br /> hThe MDL and PQL for mercury are 0.041 and 0.2 pg/L,respectively. <br /> 'The MDL and PQL for nickel are 3.61 and 5 pg/L, respectively. <br /> /The MDL and PQL for thallium are 1.97 and 5 pg/L, respectively. <br /> Notes: <br /> pg/L = microgram per liter <br /> µmhos/cm = micromhos per centimeter <br /> J = estimated value, below quantitation limit <br /> ND = nondetect <br /> RDD/070170002(NLH3358.DOC) 5 <br />