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M= r® M M M s it ® M M M r w® M r M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />G -2/G -2A <br />Units: mg/l, unless noted <br />Sample Designation <br />Sampling Date <br />G-2 <br />8/12/87 <br />G-2 <br />10/31/89 <br />G-2 <br />11/15/90 <br />G-2 <br />1/25/91 <br />G-2 <br />4/10/91 <br />G-2 <br />7/22/91 <br />G-2 <br />10/31/91 <br />G-2 <br />1/9/92 <br />G-2 <br />4/2/92 <br />G-2 <br />7/2/92 <br />G-2 <br />10/1/92 <br />G-2 <br />1/4/93 <br />G-2 <br />8/20/93 <br />Monitoring and Field Parameters <br />3- Nitroaniline <br />ND <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />ND <br />NR <br />NR <br />NR <br />NR <br />Napthalene <br />All Compounds <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />ND <br />Organochlorine Pesticides and Polychlorinated Biphenyl's (PCBs) <br />delta -BHC <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 />All Compounds <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 />Chlorinated Herbicides (ug/Il <br />2,4-D <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 />2,4,5 -TP (Silvex) <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 />All Compounds <br />Metals <br />Aluminum, Dissolved <br /><0.5 <br />0.14 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br />0.077 <br />NR <br />NR <br />Antimony, Dissolved <br /><0.05 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />Arsenic, Dissolved <br />_<0.5 <br /><0.005 <br /><0.005 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Barium, Dissolved <br />0.02 <br />0.041 <br />0.045 <br />NR <br />NR <br />NR <br />0.045 <br />NR <br />NR <br />NR <br />0.046 <br />NR <br />NR <br />Beryllium, Dissolved <br /><0.01 <br /><0.005 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Boron, Dissolved <br />0.03 <br /><0.05 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />Cadmium, Dissolved <br /><0.05 <br /><0.002 <br /><0.003 <br />NR <br />NR <br />NR <br /><0.003 <br />NR <br />NR <br />NR <br /><0.003 <br />NR <br />NR <br />Chromium, Total Dissolved <br /><0.05 <br />0.007 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Chromium Hexavalent <br />NR <br />NR <br />0.24 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />Cobalt, Dissolved <br /><0.05 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />Copper, Dissolved <br /><0.05 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />Iron, Dissolved <br />0.12 <br />0.08 <br /><0.02 <br />0.31 <br />0.16 <br /><0.05 <br /><0.02 <br /><0.05 <br /><0.05 <br /><0.05 <br /><0.02 <br /><0.05 <br /><0.05 <br />Lead, Dissolved <br /><0.2 <br /><0.002 <br /><0.002 <br />NR <br />NR <br />NR <br /><0.002 <br />NR <br />NR <br />NR <br /><0.002 <br />NR <br />NR <br />Manganese, Dissolved <br /><0.05 <br /><0.005 <br />0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Mercury, Dissolved <br /><0.0005 <br /><0.0005 <br /><0.0005 <br />NR <br />NR <br />NR <br /><0.0005 <br />NR <br />NR <br />NR <br /><0.0005 <br />NR <br />NR <br />Nickel, Dissolved <br /><0.05 <br /><0.02 <br /><0.02 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />NR <br /><0.02 <br />NR <br />NR <br />Selenium, Dissolved <br /><0.005 <br /><0.005 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Silver, Dissolved <br /><0.01 <br /><0.01 <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />Thallium, Dissolved <br /><0.5 <br /><0.005 <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />NR <br /><0.005 <br />NR <br />NR <br />Tin, Dissolved <br /><0.1 <br /><0.05 <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />NR <br /><0.05 <br />NR <br />NR <br />Vanadium, Dissolved <br /><0.1 <br />0.02 <br />0.02 <br />NR <br />NR <br />NR <br />0.019 <br />NR <br />NR <br />NR <br />0.018 <br />NR <br />NR <br />Zinc, Dissolved <br />1.1 <br /><0.01 <br />0.01 <br />NR <br />NR <br />NR <br /><0.01 <br />NR <br />NR <br />NR <br />0.014 <br />NR <br />NR <br />NR = Not Required <br />NT = Not Tested <br />* = Trace Concentration <br />[1] pH meter was not functioning properly. <br />This data point was not used for statistical <br />analysis. <br />