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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />Units: me/l unless noted <br />Sample Designation <br />S®tpiing Date <br />G-1 <br />07/01/93 <br />G-1 <br />10/05/93 <br />G-1 <br />11/03/94 <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-1 <br />07/07195 <br />G-1 <br />10/02/95 <br />G-1 0-1 G-1 <br />01/02/96 04/05/96 07/11196 <br />G-1 G-1 <br />10/03/96 01/16/97 <br />G-1 G-1 <br />04/09/97 07/10/97 <br />G-1 <br />10/01/97 <br />- - - <br />G-1 G-1 <br />01/28/98 04/16/98 <br />Moaitoring and Field Parameters <br />General Water Quality Paameters <br />4 <br />3 <br /><1.5 <br /><1.5 <br />Mm <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 />_pH (old units) (field) <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 (umlros/cm)(field) <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) (field) <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) (lield) <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 Oxygen (D.0 (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(NfU)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 />Chloride <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 />9.1 <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 />sulfate <br /><5 <br /><5 <br /><8 <br /><8 <br /><8 <br />3.6 <br />3.3 <br />trace <br />3 <br />5 <br />13 <br />trace <br />4 <br />4 <br />3 <br />3 <br />4 <br />3 <br /><1.5 <br /><1.5 <br />Mm <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 /><1.3 <br /><1.3 <br /><1.3 <br />Ceicium <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 />Magnesium <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 />Potassium <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 />Bodian <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 Comoamds ("m <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 /><0.3 <br /><0.53 <br /><0.53 <br /><0.53 <br />Benzene <br />NR <br /><I <br />NR <br />NR <br />NR <br /><0.36 <br /><0.36 <br /><0.36 <br />5" <br /><0.5 <br />1" <br />0.6" <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.08 <br /><0.5 <br /><1.0 <br /><1.0 <br />5.6 <br />Bmmbemmro <br />NT <br />NT <br />NT <br />NT <br />NT <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 /><0.1 <br /><0,1 <br /><0.1 <br /><0.1 <br /><0.74 <br /><0.74 <br /><0.74 <br />B-noehloromelhane <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 /><p.I <br /><0.1 <br /><0.1 <br /><1.2 <br /><1.2 <br /><1.2 <br />Bromodichloromethave <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 />Bro- orm <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 /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><1.4 <br /><1.4 <br /><1.5 <br />Bromomelhmro NT NT NT NT NT NT NT NT <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.4 <0.4 <0.4 <1.1 <Ll <l.l <br />n-bulylbenzene NT NT NT NT NT <0.3 <0.3 <0.3 0.4" <0.3 <0.3 <0.3 <0.3 <0.3 <0.2 <0.2 <0.2 <1.6 <1.6 <L6 <br />sec-butylbenzem <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.3 <br /><0.3 <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 /><1.5 <br /><1.5 <br /><1.5 <br />tert-butylbenzene <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 /><1.3 <br /><1.3 <br /><1.3 <br />Carbon tetrachloride <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 /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><0.5 <br /><1.3 <br /><1.3 <br /><1.3 <br />Chlmobenzem <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.1 <br /><0.I <br /><0.1 <br /><0.I <br /><0.I <br />NT <br />NT <br />NT <br /><0.90 <br /><0.90 <br /><0.90 <br />Chloroethane <br />NR <br /><10 <br />NR <br />NR <br />NR <br /><0.50 <br /><0.50 <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 />adoretorot <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 /><0.2 <br /><0.2 <br /><0.83 <br /><0.83 <br /><0.84 <br />Chloromdham <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 /><0.3 <br /><0.53 <br /><0.53 <br /><0.53 <br />2-chlorololmne <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 /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><0.71 <br /><0.71 <br /><0.71 <br />4-chlorotoluene <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 /><0.2 <br /><0.2 <br /><0.2 <br /><0.2 <br /><I.1 <br /><LI <br /><l.l <br />dibroaochlorometham <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.I <br /><0.1 <br /><0.1 <br /><Q.I <br /><0.1 <br /><0.1 <br />NT <br />NT <br />NL <br /><0.97 <br /><0.97 <br /><0.97 <br />1,2-dibrmno-3-chloropane <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 /><11 <br /><1.2 <br />1,2-dib,omaetham <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 />Dibrorn-them <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 /><0.4 <br /><0.4 <br /><I.5 <br /><1.5 <br /><1.5 <br />1,2 -dichlorobenzene <br />NT <br />NT <br />NT <br />NT <br />NT <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.I <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0.1 <br /><0, t <br /><0.1 <br /><0.95 <br /><0.95 <br /><0.96 <br />1,3 -Dichlorobenzene NR <I NR NR NR <0.49 <0.49 <0.49 <0.I <0.1 <0.1 NR <0.1 <0.1 <0.10 <0.1 <1,l <l.l <Ll <br />1,4 -Dichlorobenzene NR <I NR NR NR <0.43 <0.43 <0.43 <0.I <0.1 <0.1 NR <0.1 <0.1 <),II <0.1 <0.89 <0.89 <0.90 <br />n.,-.t.t.,.nam,.,...,...at...,. NT NT NT NT NT NT NT NT <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 _ <0.3 <0.3 <0.19 <0.19 <0.19 <br />NR - Not Required <br />NT - Not Tested <br />" = Truce Co aftatimt <br />(11 This data point appears momelmra ad therefore was mt used for at -ti -tical purposes. <br />1) Parameter also detected in one or rare quality control blades <br />