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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-1 <br /> Units:mg/l,unless noted <br /> Sample Uesignation <br /> Sampling Date 10/14/02 1/29/03 5/30/03 8/13/03 1/22/04 <br /> Monitoring and Field Parameters <br /> General Water uality Parameters <br /> em��erature (field) 20.4 23. <br /> Chloride 9.2 6.7 NM 6.4 9.5 <br /> Nitrate-Nitrogen <br /> Total Dissolved Solis 360 180 NM 170 18 <br /> Sulfate 5.8 6.5 NM 6.3 15 <br /> pH(std.units a 7.81 7.42 7.04 <br /> Electrical Concluctivi!yum os cm 379 234 208 231 <br /> ur i i ie 2.9 0. 3.7 <br /> cium 8 <br /> Potassium NM 3.3 <0.92 2 <br /> Magnesium NM 9.8 9.7 9. <br /> 50dium NM 11 11 11 <br /> Volatile.0 anic om ounds /I <br /> me oroet ene <0.2 <0.36 <0.36 < . <br /> i 1-Dic oroe ene <0. <0.24<0..2 <br /> Chloroform < , <0.37 NM <0.37 <0.37 <br /> Benzene <0.20 <0.28 <0.28 <0.28 <br /> m p- Y ene <0.20 <0.38 NM <0.38 <0.38 <br /> Chlorobenzene <0.2 <0.32 <0.32 <0.32 <br /> e ene one <0. < . ( .2 <0.23 <br /> cetone <2.0 11.01 <U.52 <br /> Naphthalene <0.3 <0.93 NM <0.9 <0.93 <br /> Methyl tert- uty et er 5.3 <0.36 NM <0.3 <0.36 <br /> toluene <0. <0.32 <0.32 <0.32 <br /> 1,4-Dichlorobenzene < < <0.46 <0.46 <br /> etrac oroet ene <0.3 <0.44 <0.44 <0.44 <br /> - utanone < <0.14 <0. <0.14 <br /> 1,3- c oro ro ane < < <-0.40- <0.40 <br /> Chloromethane <0.3 <0.18 NM { . 0.18 <br /> 0,2,4-Trimethyl enzene N < 8 < <br /> 1,j,5-j nmethyibenzene NM <0.28 <0.28 <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All ompoundsNR NRNR1FR NR <br /> Organochlorine.Pesticides and.Polychlorinated Biphenyl's <br /> (EPA Method 3510/8080) <br /> All ompounds NIS ISR 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:7/26/2004 7 of 28 <br />