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HISTORICAL SUMMARY OF ANALYTICAL RESULTSGROUNDWATERNORTH COUNTY SANITARY LANDFILLG-14Sample DesignationG-14 G-14 G-14 G-14 G-14 G-14 G-14 G-14 G-14Sampling Date08/29/22 10/03/22 01/17/23 04/17/23 06/27/23 07/17/23 10/24/23 01/23/24 04/02/24Field MeasurementsTemperature (°C)NS NS NS NS 21.5 21.2 NS 18.8 NSpH (std. units)NS NS NS NS 7.37 7.21 NS 7.31 NSElectrical Conductivity (umhos/cm) NS NS NS NS 255.2 268.1 NS 271.6 NSTurbidity (NTU)NS NS NS NS 548 51.1 NS 117 NSDissolved Oxygen (D.O) NS NS NS NS 1.14 4.71 NS 0.9 NSOxygen Reduction Potential (ORP) NS NS NS NS +163 +152 NS 248 NSAnalytical Laboratory Parameters:General Chemistry (mg/L)Calcium, dissolved NS NS NS NS 25 20 NS 19 NSMagnesium, dissolved NS NS NS NS 15 11 NS 11 NSSodium, dissolvedNS NS NS NS 19 NR NS 17 NSPotassium, dissolved NS NS NS NS 5.4 NR NS 3.5 NSAlkalinity, Bicarbonate NS NS NS NS 120 NR NS 120 NSAlkalinity, Carbonate NS NS NS NS NR NR NS NR NSTotal AlkalinityNS NS NS NS 96 97 NS 96 NSChlorideNS NS NS NS 15 15 NS 15 NSNitrate NitrogenNS NS NS NS 2.3 NR NS 2.3 NSSulfateNS NS NS NS 4.1 NR NS 4.4 NSDissolved Hardness (calculated) NS NS NS NS 130 92 NS 93 NSTotal Dissolved Solids NS NS NS NS 220 220 NS 220 NSCyanideNS NS NS NS 0.0019* NR NS NR NSSulfideNS NS NS NS <0.050 NR NS NR NSChemical Oxygen Demand NS NS NS NS 46 6.2* NS <4.3 NSTotal Organic Carbon NS NS NS NS NR NR NS NR NSVolatile Organic Compounds (ȝg/L)BenzeneNS NS NS NS <0.083 <0.083 NS <0.083 NSBromobenzeneNS NS NS NS <0.13 <0.13 NS <0.13 NSBromochloromethane NS NS NS NS <0.24 <0.24 NS <0.24 NSBromodichloromethane NS NS NS NS <0.14 <0.14 NS <0.14 NSBromoformNS NS NS NS <0.27 <0.27 NS <0.27 NSBromomethaneNS NS NS NS <0.25 <0.25 NS <0.25 NSn-butylbenzeneNS NS NS NS <0.11 <0.11 NS <0.11 NSsec-butylbenzeneNS NS NS NS <0.15 <0.15 NS <0.15 NStert-butylbenzeneNS NS NS NS <0.13 <0.13 NS <0.13 NSCarbon tetrachloride NS NS NS NS <0.18 <0.18 NS <0.18 NSChlorobenzeneNS NS NS NS <0.093 <0.093 NS <0.093 NSChloroethaneNS NS NS NS <0.14 <0.14 NS <0.14 NSChloroformNS NS NS NS <0.12 <0.12 NS <0.12 NSChloromethaneNS NS NS NS <0.14 <0.14 NS <0.14 NS2-chlorotolueneNS NS NS NS <0.20 <0.20 NS <0.20 NS4-chlorotolueneNS NS NS NS <0.15 <0.15 NS <0.15 NSdibromochloromethane NS NS NS NS <0.13 <0.13 NS <0.13 NS1,2-dibromo-3-chloropane NS NS NS NS <0.44 <0.44 NS <0.44 NS1,2-dibromoethaneNS NS NS NS <0.16 <0.16 NS <0.16 NSDibromomethaneNS NS NS NS <0.24 <0.24 NS <0.24 NS1,2-dichlorobenzene NS NS NS NS <0.072 <0.072 NS <0.072 NS1,3-Dichlorobenzene NS NS NS NS <0.15 <0.15 NS <0.15 NS1,4-Dichlorobenzene NS NS NS NS <0.062 <0.062 NS <0.062 NSDichlorodifluoromethane NS NS NS NS <0.099 <0.099 NS <0.099 NS1,1-Dichloroethane NS NS NS NS <0.11 <0.11 NS <0.11 NS1, 2-Dichloroethane NS NS NS NS <0.17 <0.17 NS <0.17 NS1,1-dichloroetheneNS NS NS NS <0.18 <0.18 NS <0.18 NScis-1,2-Dichloroethene NS NS NS NS <0.085 <0.085 NS <0.085 NStrans-1,2-dichloroethene NS NS NS NS <0.15 <0.15 NS <0.15 NS1,2-dichloropropane NS NS NS NS <0.13 <0.13 NS <0.13 NS1,3-dichloropropane NS NS NS NS <0.086 <0.086 NS <0.086 NS2,2-dichloropropane NS NS NS NS <0.13 <0.13 NS <0.13 NS1,1-dichloropropene NS NS NS NS <0.085 <0.085 NS <0.085 NSCis-1,3-dichloropropene NS NS NS NS <0.14 <0.14 NS <0.14 NStrans-1,3-dichloropropene NS NS NS NS <0.079 <0.079 NS <0.079 NSEthylbenzeneNS NS NS NS <0.098 <0.098 NS <0.098 NSHexachlorobutadiene NS NS NS NS <0.17 <0.17 NS <0.17 NSIsopropylbenzeneNS NS NS NS <0.14 <0.14 NS <0.14 NSp-isopropyltolueneNS NS NS NS <0.12 <0.12 NS <0.12 NSMethylene Chloride NS NS NS NS <0.48 <0.48 NS <0.48 NSMethyl tert-butyl ether NS NS NS NS <0.11 <0.11 NS <0.11 NSNaphthaleneNS NS NS NS <0.36 <0.36 NS <0.36 NSn-propylbenzeneNS NS NS NS <0.11 <0.11 NS <0.11 NSStyreneNS NS NS NS <0.068 <0.068 NS <0.068 NS1,1,1,2-tetrachloroethane NS NS NS NS <0.18 <0.18 NS <0.18 NS1,1,2,2-tetrachloroethane NS NS NS NS <0.17 <0.17 NS <0.17 NSTetrachloroethene (PCE) NS NS NS NS <0.13 <0.13 NS <0.13 NSTolueneNS NS NS NS <0.093 <0.093 NS <0.093 NS1,2,3-Trichlorobenzene NS NS NS NS <0.16 <0.16 NS <0.16 NS1,2,4-Trichlorobenzene NS NS NS NS <0.19 <0.19 NS <0.19 NS1,1,1-trichloroethane NS NS NS NS <0.11 <0.11 NS <0.11 NS1,1,2-trichloroethane NS NS NS NS <0.16 <0.16 NS <0.16 NSTrichloroetheneNS NS NS NS <0.085 <0.085 NS <0.085 NSTrichlorofluoromethane NS NS NS NS <0.13 <0.13 NS <0.13 NS1,2,3-trichloropropane NS NS NS NS <0.24 <0.24 NS <0.24 NS1,1,2-Trichloro-1,2,2-trifluoroethane NS NS NS NS <0.15 <0.15 NS <0.15 NS59 of 146