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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br />FOOTHILL SANITARY LANDFILL <br />Units: mg/1, unless noted <br />Page 1 of 22 <br />Sample Designation <br />MW -1* <br />MW -1* <br />MW -1* <br />MW -1* <br />MW -1* <br />MW -1 <br />MW -1 <br />MW -1 <br />MW -1 <br />MW -1 <br />MW -1 <br />MW -1 <br />MW -1 <br />Sampling Date <br />7/10/1989 <br />10/20/1989 <br />1/18/1990 <br />4/5/1990 <br />7/12/1990 <br />10/2/1990 <br />1/14/1991 <br />4/3/1991 <br />7/18/1991 <br />10/10/1991 <br />1/10/1992 <br />4/3/1992 <br />7/1/1992 <br />Ouarterly Monitoring and Field Parameters <br />Volatile Organic Compounds (ug/I) <br />(EPA Method 8260) <br />Trichloroethene (TCE) <br />1,1-Dichloroethene <br />Chloroform <br />Chlorobenzcne <br />Chloride <br />11 <br />9.2 <br />6 <br />6.9 <br />6.5 <br />5.7 <br />6.4 <br />6.8 <br />6.7 <br />6.4 <br />NR <br />13 <br />6 <br />Nitrate -Nitrogen <br />0.67[1] <br />2.5 <br />2.5 <br />2.5 <br />2.5 <br />2.6 <br />NR <br />NR <br />NR <br />NR <br />2.4 <br />3.4 <br />2.4 <br />Total Dissolved Solids <br />151 <br />184 <br />177 <br />185 <br />93 [1] <br />181 <br />131 <br />165 <br />197 <br />191 <br />240 <br />180 <br />210 <br />Sulfate <br />7 <br />7.2 <br />7.3 <br />7 <br />6.7 <br />6.3 <br />6.7 <br />6.5 <br />6.6 <br />6.8 <br /><8 <br /><8 <br />7 <br />pi{ (std. units) (field) <br />8.00 <br />NR <br />NR <br />NR <br />NR <br />NR <br />Nit <br />Nit <br />NR <br />NR <br />7.56 <br />7.35 <br />7.50 <br />Electrical Conductivity (umhos/em) (field) <br />291 <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />NR <br />271 <br />244 <br />248 <br />Turbidity (NTU) (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 />Temperature (°C) (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 />Constituents of Concern Parameters <br />Semivolatile Organic Compounds <br />(EPA Method 3520/8270) <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 />Organochlorine Pesticides and Polychlorinated Biphenyl's <br />(EPA Method 3510/8080) <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 <br />(EPA Method 8150A Modified) <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 />* = Trace Concentration <br />[ 1 ] This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br />ND = Not Detected <br />NR = Not Required <br />N:\XIS\0939\00408\Hist, Revision 1: 3/31/2000 <br />QA/QC <br />® ® = = M = ® M = ® M M = = = M = _ <br />