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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-1 <br /> Units:m p,unless noted <br /> amp a esignation -1 ' <br /> 1 MW-1 <br /> Sampling Date 1/5/94 4/5/94 7/5/94 11/28/94 4/21/95 7/6/95 10/11/95 1/5/96 4/2/96 7/9/96 10/2/96 1/16/97 4/10/97 7/10/97 10/3/97 3/11/98 4/30/98 <br /> Monitorina and Field.Parameters <br /> General Water QualijParamet rs <br /> em erature (field) NR NR NR 13.7 20.2 22.5 21.5 18.6 21.3 22.3 21.8 15.2 24.4 21.5 2 1 .5 0.6 <br /> Chloride 7 5 7 6.3 4.9 5 6 6 5 6 6 4.7 4.7 4.7 6.1 8 6.8 <br /> urate- itro en 1.3 2 1.4 2.4 .6 .3 .5 2. 2. 2. 3. 2. <br /> ota i" ve Solids 210 220 220 186 200 160 240 2h 230 250 210 225 187 194216 196 186 <br /> Sulfate <8 <8 10 6.5 4.9 6 7 6 6 6 7 4.9 5.1 4.8 6 6.5 6.6 <br /> pH(std.units ie 7.80 7.62 7.89 8.48 7.89 7.81 1.8b 7.97 7,35 7.65 7.25 9.28 7.65 7.83 7.93 7.97 8.03 <br /> ectrica on uctivi umhos/cm) 305 294 281 287 245 263 269 246 236 257 245 610 153 173 278 224 245 <br /> urbi i field NR 6.9 1 4 14 11 20.8 16.9 2.27 3. 2. 9 5 .5 1 9. <br /> a cwm <br /> Potassium <br /> Magnesium <br /> sodium <br /> Vol the OEganic Com ounds u /1 <0. <0.8 < . <br /> nc oroet ene <br /> 1,1- ich oroet ene <0.72 `0.72672 <br /> Chloroform <br /> <0.83 <0.83 <6.83 <br /> Benzene <br /> m/p-Xylene <br /> oro enzene <br /> et eneChloride <br /> cetone <br /> ata ene <br /> Methyll ter-butyl ether <br /> Toluene <br /> 1,4-Dichlorobenzene <br /> etrac oroethene <br /> - utanone <br /> 1,3-Dichloropropane <br /> Chloromethane <br /> - rimeth enzene <br /> 1,3,5-Trimethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Comoounds <br /> EPA Method 3520/8270 <br /> All Compouncis NR N R NR ND NR N R N R NR N R NR N R NR N R N R NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> EPA Method 3510/8080 <br /> ompoun s NR NR NR ND NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Trace Concentration <br /> [1]This analytical result appears to be anomalous and therefore was not used in statistical evaluation procedures. <br /> (1)Parameter also detected in one or more quality control blanks <br /> ND=Not Detected <br /> NM=Not Measured <br /> NR=Not Required <br /> MW-1;Printed:1/30/2004 3 of 28 <br />