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M® r®®®® s M s M M® M M <br />HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />GROUNDWATER <br />NORTH COUNTY SANITARY LANDFILL <br />G -2/G -2A <br />Units: mg/I, 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 />Vinyl Chloride <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 />Total Xylenes <br /><2 <br />NR <br /><1 <br />NR <br />NR <br />NR <br /><1 <br />NR <br />NR <br />NR <br /><1 <br />NR <br />NR <br /><10 <br /><10 <br /><10 <br />NR <br />NR <br />NR <br /><20 <br />NR <br />NR <br />NR <br /><20 <br />NR <br />NR <br />_Acetone <br />Acrylonitrile <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 />Carbon Disulfide <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 />trans-1,4-dichloro-2-butene <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 />2-hexanone <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 />Methyl ethyl ketone (MEK) <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 />Methyl Iodide <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 />Methyl isobutyl ketone <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 />vinyl acetate <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 />Acrolein <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 />Acetonitrile <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 />Allyl chloride <br />NT <br />NT <br />NT <br />NT <br />NT <br />(2.3*) <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />NT <br />2-chloroethyl vinyl ether <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 />Chloropmrie <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 />Isobutanol <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 />Methacrylonitrile <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 />Methyl methacrylate <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 />Propionitrile <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 />m/p Xylene <br /><2 <br />NR <br /><2 <br />NR <br />NR <br />NR <br /><2 <br />NR <br />NR <br />NR <br /><2 <br />NR <br />NR <br />o -Xylene <br /><3 <br />NR <br /><3 <br />NR <br />NR <br />NR <br /><3 <br />NR <br />NR <br />NR <br /><3 <br />NR <br />NR <br />Constituents of Concern <br />Total Organic Carbon <br />6.4 [1] <br />NR <br /><0.5 <br />0.9 <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 />Alkalinity, Bicarbonate <br />NR <br />NR <br />84 <br />80 <br />82 <br />82 <br />83 <br />85 <br />94 <br />88 <br />77 <br />81 <br />85 <br />Alkalinity, Carbonate <br />NR <br />NR <br /><1 <br /><1 <br /><1 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br /><5 <br />5 <br />Total Alkalinity <br />110 <br />NR <br />84 <br />80 <br />82 <br />82 <br />83 <br />85 <br />94 <br />88 <br />77 <br />81 <br />85 <br />Cyanide <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 />Sulfide <br />NR <br />NR <br /><0.1 <br />0.2 <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 />Semivolatile Organic Compounds (ug/p <br />Bis(2-ethylhexyl) Phthalate <br /><2 <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 />4-Methylphenol <br /><2 <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-Methylphenol <br /><2 <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 />3 and 4-Methylphenol <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 />Diethyl Phthalate <br /><2 <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 />1,4 -Dichlorobenzene <br /><3 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><2.2 <br />NR <br />NR <br />NR <br />NR <br />Isophrone <br /><4 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><2.2 <br />NR <br />NR <br />NR <br />NR <br />Phenol <br /><5 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br /><2.6 <br />NR <br />NR <br />NR <br />NR <br />