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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-3 <br /> Units:m n,unless noted _ _ _ _ <br /> Sample Designation -3 - MW-3 M - M -3 - M -3 MW-3 M - - <br /> 3 MW-3 Sampling Date 1/16/95 4/20/95 7/6/95 10/11/95 1/4/96 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 7/7/98 10/9/98 1/15/99 <br /> Monitoring and Field Parameters <br /> General Water Quali!y Parameters _ __ _ __ <br /> Tem erature °C field 18 1 19 8 21 5 22 5 18.4 20.8 22.5 21 3 17 1 25.3 24 22 2 20.17 21 8 23.8 _2.0. 6 17.7 <br /> P __t._��__� _T.-- --- <br /> Cfiloride 10 8.6 i 9---- -9----- 9.- 9 -9 - _ 9 --7 3- -- 7 5----- 7 __ 8 7-.__ 11- ---11T--10 _ 10 _...10.2 <br /> Nitrate- trogen 3.6 3.8 3.7 3.5 3.3 39 3.3 4.1 3 3.6 2 6 <br /> 3.3-3.9 4.2- 4.2 4 2 0.23 <br /> Total Dissolved Solids 230 220 179 260 250 250 230 230 230 178 220 246 216 215 -229 196 1.8 <br /> Sulfate - __ (28] . 4 3 5 6 6. 5 6 6 4.9 - 4.5 5 5.5 6._ 6.1 8.2 - 6 6.8 <br /> pH(std.unit�_(field) - _ 774-----7. .83 7.80 _7.62 7.81 7.48 7.49 7.34 8 68 7 7.08 7 8 7.81 7.72 8.18 �_7.5 8.28 <br /> Electrical Conductiwt umhos�) 304 275 299 286 294 277 289 _ 275 _ 460 238 266 267 242 277.3 271 264 272 <br /> Turbidit NTU)(field) 100.6 140 136 68 42 120.3 58.0 65.1 2.3 �2.1 1.98 19.38 0.8 18.7 2.5 15.1 LOW <br /> Calcium -- <br /> Potassium - <br /> Ma nesium ------- --------Sodium. - - ----------- <br /> Volatile <br /> _--Volatile Organic Compounds(ug/I) <br /> Trichloroethene(TCE) 0.9 <0.43 <0.4 <0.4 0.5" <0A <0.4 0.7" <0.5 0.86 <0.4 <0.89 <0.89 <0.89 <0.89 <0.89 4.0 <br /> 1,1-Dichloroethene <0.4 <0.4 <0.4 0.29" <0.4 <0.72 <0.72 <0.72 <0.72 <0.72 4.0 <br /> <0.83 <0.83 <0.83 2.6 <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <br /> hloroform <0.83 _ <br /> 4.2 <br /> Benzene - <br /> 1.5 <br /> m/p-Xylene <br /> 4.0 <br /> Chlorobenzene <br /> Methylene Chloride <br /> Acetone <br /> Napthalene <br /> Methyl ter-butyl ether 4.1 <br /> Toluene <br /> 1,4-Dichlorobenzene - <br /> Tetrachloroethene <br /> 2-Butanone <br /> 1,3-Dichloro ropane <br /> Chloromethane <br /> 1 2 4-Trimethylbenzene <br /> 1 3 5-Trimethylbenzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All Compounds NR NR NR NR -NR NRi�NRF� -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-3:Printed:1/30/2004 19 of 28 <br />