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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />Units' mg/1 unless acted <br />Sample Designation <br />Sampling Dale <br />G-1 <br />07/01/93 <br />G -I <br />10/05193 <br />G-1 <br />11/03194 <br />G-1 <br />04/04/94 <br />G-1 <br />07/01/94 <br />G-1 <br />12/01/94 <br />G-1 <br />01/03/95 <br />0-1 <br />04/03/95 <br />G -I <br />07/07/95 <br />G -h <br />10/02/95 <br />G-1 <br />01/02/96 <br />G-1 <br />04/05/96 <br />G -I <br />07/11/96 <br />G-1 <br />10/03/96 <br />G-1 G-1 <br />01/16197 04/09/97 <br />0-1 <br />07/10/97 <br />6-1 G-1 <br />10/01/97 01/28/98 <br />G-1 <br />04/16/98 <br />Monituri- nad Field Parameters <br />General Water Quality Parameters <br />pH (std. units) (fell) <br />7.21 <br />6.49 <br />6.95 <br />6.97 <br />7.25 <br />7.08 <br />7.34 <br />6.72 <br />7.30 <br />7.15 <br />7,21 <br />6.84 <br />6.90 <br />6.75 <br />8.22 <br />8.02 <br />7.37 <br />6.97 <br />6.95 <br />7.15 <br />Electrical Conductivity (undros/an) (Geld) <br />219 <br />206 <br />192 <br />273 <br />255 <br />241 <br />218 <br />203 <br />227 <br />214 <br />211 <br />215 <br />211 <br />212 <br />60 <br />410 <br />140 <br />190 <br />205 <br />180 <br />Temperature (°C (fiaid) <br />NR <br />NR <br />NR <br />NR <br />NR <br />19.8 <br />19,7 <br />22.1 <br />23.8 <br />22.8 <br />19.9 <br />21.8 <br />23.0 <br />22.5 <br />19.2 <br />22.0 <br />23.6 <br />21,5 <br />20.5 <br />21.4 <br />Oxygen Reduction Potential (ORP) (Geld) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR_ <br />_Dissolved Ogg r (D O) (field) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Turbidity(NTU) field <br />NR <br />NR <br />NR <br />NR <br />NR <br />0,8 <br />0.8 <br />0.1 <br />0.2 <br />4 <br />0.20 <br /><1 <br />5.1 <br />2.7 <br />0.3 <br />5.1 <br />1.5 <br />2.3 <br />1.0 <br />2.5 <br />Cldoridc <br />8 <br />8 <br />14 <br />8 <br />7 <br />9.4 <br />8.0 <br />7 <br />8 <br />9 <br />9 <br />8 <br />8 <br />8 <br />7.1 <br />7.5 <br />10.6 <br />91 <br />10 <br />9.6 <br />Total Hardness (calculated) <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Total Dissolved Solids <br />170 <br />190 <br />200 <br />200 <br />190 <br />178 <br />176 <br />210 <br />200 <br />210 <br />190 <br />210 <br />220 <br />180 <br />195 <br />191 <br />178 <br />146 <br />159 <br />134 <br />Chemical Oxygen Demand <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nitrate Nitrogen <br />1.5 <br />1.3 <br />1.3 <br />1.9 <br />1.3 <br />1.4 <br />1.4 <br />1.4 <br />1.4 <br />1.2 <br />1.3 <br />1.3 <br />1.2 <br />1.4 <br />1.3 <br />1.4 <br />1.3 <br />1.1 <br />Ib <br />1.3 <br />Sulfate <br /><5 <br />5 <br /><8 <br /><8 <br /><8 <br />3.6 <br />3.5 <br />trace <br />3 <br />5 <br />13 <br />trace <br />4 <br />4 <br />3 <br />3 <br />4 <br />3 <br />5 <br />4 <br />Metals <br />Calcium <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Magnesias <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Potassimn <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Sodium <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />Volatile Organic Compounds (ug/I) <br />Benzene <br />NR <br /><l <br />NR <br />NR <br />NR <br /><0.36 <br />10.36 <br /><0.36 <br />_ <br />5" <br />'<0.5 <br />1* <br />0.6• <br /><0.5 <br />10.5 <br />10.5 <br /><0.08 <br /><0.5 <br />11.0 <br /><I.0 <br />5.6 <br />Bronaobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />10.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br />10.1 <br /><0.1 <br /><0.1 <br /><0.74 <br /><0.74 <br /><0.74 <br />Bromocldoromelhane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0,1 <br /><0.I <br /><0.1 <br /><1.2 <br /><1.2 <br /><1,2 <br />Br omodlchloroaefhane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.4 <br /><0,4 <br /><0.4 <br /><0.4 <br /><0,4 <br /><0.4 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.90 <br /><0.90 <br /><0.90 <br />Bromofomn <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />10.2 <br />10.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />10.2 <br /><1.4 <br /><1.4 <br /><1.5 <br />Bromomethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0-2 <br /><0.4 <br /><0.4 <br /><0.4 <br /><LI <br /><IA <br /><I.1 <br />a-butyll enzene <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br />0.4" <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br />10.2 <br /><0.2 <br /><0.2 <br /><1.6 <br /><1.6 <br />11.6 <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><1.5 <br /><1,5 <br /><1.5 <br />_sec-butylbenzene <br />teat-butylbenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />10.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><1.3 <br /><I.3 <br /><1.3 <br />Carbon tetrachloride <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />10.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><L3 <br /><I.3 <br /><1.3 <br />_ <br />Chlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />10.1 <br />10.1 <br /><0.1 <br /><0.1 <br /><G.I <br /><0.1 <br />NT <br />NT <br />NT <br /><0.90 <br /><0.90 <br /><0.90 <br />Clloroethaae <br />NR <br /><10 <br />NR <br />NR <br />NR <br /><0.50 <br />10.50 <br /><0.50 <br /><0.3 <br /><0.3 <br /><0.3 <br />NR <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.25 <br /><0,3 <br /><1.2 <br /><1,2 <br /><1.2 <br />CLlorolomn <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br />10.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.83 <br /><0.83 <br /><0.84 <br />Chloromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><03 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br />10.3 <br /><0.53 <br /><0.53 <br /><0.53 <br />2-chlorotohiene <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />10.2 <br /><0.2 <br /><0,2 <br /><0.2 <br /><0.71 <br /><0.71 <br /><0.71 <br />4-c1doroto1vrene <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br />10.2 <br />10.2 <br />10.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0,2 <br /><0.2 <br /><I.l <br /><I.1 <br /><I.1 <br />dib-nael bromelhane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.I <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br />NT <br />NT <br />NT <br /><0.97 <br /><0.97 <br /><0.97 <br />1,2-dibromo-3-chloropmre <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><1,2 <br /><1,2 <br /><1.2 <br />1,24bromoelhane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.5 <br /><0.5 <br /><0.5 <br /><0,94 <br /><0.94 <br /><0.94 <br />Dibromonrothane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.4 <br /><0.4 <br /><0,4 <br /><0.4 <br /><0.4 <br /><0.4 <br /><0A <br /><0.4 <br /><0.4 <br /><1.5 <br /><1.5 <br /><1.5 <br />1,2 -dichlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0,I <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br />10.1 <br /><0.1 <br /><0.1 <br /><0.95 <br /><0.95 <br /><0.96_ <br />_ <br />1,3 -Dichlorobenzene <br />NR <br /><I <br />NR <br />NR <br />NR <br /><0.49 <br /><0.49 <br /><0.49 <br /><0,1 <br /><0.I <br /><0.1 <br />NR <br /><0.1 <br />10,1 <br /><0.10 <br /><0.1 <br /><I.1 <br /><I.l <br /><l.l <br />1,4 -Dichlorobenzene <br />NR <br /><I <br />NR <br />NR <br />NR <br /><0.43 <br /><0.43 <br /><0.43 <br /><0.1 <br /><0.1 <br /><0.1 <br />NR <br /><0.I <br /><0.1 <br /><0.II <br /><0.1 <br /><0.89 <br /><0.89 <br /><090 <br />_ <br />Dicblorodifuoromethane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><0.3 <br /><03 <br />10,19 <br /><0. 19 <br /><0. 19 <br />1,1-Dichloroelhene <br />NR <br /><I <br />NR <br />NR <br />NR <br /><0.28 <br /><0.28 <br /><0.28 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.08 <br /><0.2 <br /><1.2 <br /><1.2 <br />1.2 <br />1,2-Dichloroelhane <br />NR <br /><I <br />NR <br />NR <br />NR <br /><OA6 <br /><0.46 <br /><0.46 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br />1_0.12 <br />10.5 <br /><I.1 <br /><LI <br /><Ll <br />I,1-dichloroethene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.4 <br /><0.4 <br /><0.4 <br /><0.4 <br /><0.4 <br /><0.4 <br /><0.4 <br />104 <br /><0.4 <br /><032 <br /><0.72 <br /><0.73 <br />cis-1,2-Dichhoreellua <br />NR <br /><5 <br />NR <br />NR <br />NR <br /><0.50 <br /><0.50 <br /><0.50 <br />10.1 <br /><0.1 <br /><0.1 <br /><0,1 <br />10.1 <br /><0.1 <br /><0.1 <br /><0.09 <br /><0.1 <br /><0.82 <br /><0.82 <br /><0.82 <br />turns-1,2-dichloroethene <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />10.2 <br /><0.2 <br /><0.2 <br />10,2 <br /><0.2 <br /><0.94 <br /><0.94 <br /><0.95 <br />1,2-dichloropropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><05 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.15 <br /><0. 15 <br /><OJ5 <br />1,3-dichl-laropane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br />10.2 <br />10.2 <br /><L1 <br /><1.1 <br /><LI <br />2.2-dichloroprooane <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.4 <br />10.4 <br /><0.4 <br /><0A <br />10.4 <br /><0.4 <br /><0A <br /><0.4 <br />10.4 <br /><I.0 <br /><I.0 <br /><L0 <br />NR - Not Required <br />NT = Not Tested <br />' = Trace Concentration <br />111 This data point appears anomalous and therefore was not used for statistical purposes. <br />111 Parameter also detected in one or more quality control blanks. <br />