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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-2 <br /> Units:mg/l,unless noted <br /> Sample Designation - - - -2 - -2 - - - - - - - - - - <br /> Sampling Date 4/30/98 7/7/98 10/9/98 1/15/99 4/1/99 7/7/99 10/20/99 3/8/00 5/11/00 7/13/00 10/9/00 1/15/01 4/30/01 8/2/01 10/29/01 2/6/02 4/30/02 <br /> Monitoring and Field Parameters <br /> General Wat r uali Parameters <br /> Temperature field 20.1 22.4 20.4 19.7 19.4 22.2 20.6 18 19.5 20.5 19.7 15.8 19.8 20.8 19.3 16.8 17.7 <br /> Chloride 7.2 7.2 6.7 7.6 9.2 6.4 6.55 7.02 7.04 6.98 7.3 7.12 7.05 6.6 <0.13 8.5 6.9 <br /> rate-N3.3 en 3.3 3.2 3.3 3.5 3.2 3.4 2.62 2.75 2.82 2.8 3.06 2.94 2.92 2.9 2.7 4 3.1 <br /> ota isso ve of s 159 188 180 157 145 172 165 163 169 162 163 171 172 160 160 160 180 <br /> Sulfate 2 2 2 2.2 1.8 5.9 3.04 3.68 2.67 3.9 3.48 3.47 3.01 2.9 2.5 2.4 1.3 <br /> H(std.units)(field) 7.34 7.14 8.27 8.16 7.7 7.78 7.94 7.15 8.3 8.47 6.7 7.98 6.54 7.4 6.19 6.71 6.80 <br /> lectncalonductivi (um os/cm . <br /> 57.9 209 198 199 196 196 1 6.9 197 88 202 2 3 98 57 1 380 180 0 <br /> TurbidityNT (field) 22.6 2.1 1.7 LOW 1.46 1.95 0.46 1.2 2 0.67 0.58 2.14 10.6 7.2 9.7 2.8 4.8 <br /> Calcium <br /> otassium <br /> Magnesium <br /> Sodium <br /> Volatile Or anic Com Min u /I <br /> Trichloroethene(TCE) <0.89 <0.89 <0.89 <0.89 <0.89 <0.89 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 _ <0.18 <0.06 <br /> 1,1-Dichioroethene <0.72 <0.72 <0.72 <0.72 <0.72 <0.72 <0.04 <0.04 <0.05 <0.06 <0.06 <0.0 <0.06 <0.06 <0.06 <0.12 <0.06 <br /> Chloroform <0.83 <0.83 <0.83 <0.83 <0.83 <0.83 <0.06 <0.07 <0.06 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.18 <0.07 <br /> Benzene <1.0 <1.0 <1.0 <0.04 <0.05 <0.04 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.14 <0.05 <br /> m -X leve <0.78 <0.78 <0.78 <0.21 <0.21 <0.07 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.24 <0.21 <br /> hiorobenzene 2.7 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.16 <0.07 <br /> Methylene Chloride (0.0821 2.45 <0.03 <0.06 <0.0 ;0.0989") <0.0 <0.06 <0.06 (1.6) (0.17* <br /> Acetone ND ND ND ND (2.09*} <1.79 <1.79 <1.79 <1.8 <1.8 (4.5-) tz.s_? <br /> �l�aptha ene D ND ND D 0.11 < .1 <011 <0.1 <0.1 <0.1 <0.46 <0.10 <br /> Methyl ter-butyl ether <0.08 <0.08 <0.08 <0.18 <0.08 <br /> Toluene <0.07 <0.07 <0.07 <0.16 <0. 77 <br /> 1,4-Dichlorobenzene <0.11 <0.11 <0.23 <0.11 <br /> etrach oroethene <0.08 <0.08 <0.22 <0.0 <br /> 2-Butanone <br /> <0.70 <0.65 <0.70 <br /> 1,3- is loro ro ane 0.4 <0.09 <br /> oromethane 0.16 <br /> 2, - rimeth benzene <br /> 1,3,5-Trimethyl benzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR N R NR NR NR ND NR NR NR NR NR NR NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biphenvl's <br /> (EPA Method 3510/8080) _ <br /> I Compounds NR NR NR NR NR NR ND NR NR NR NR NR NR NR NR NR NR <br /> race 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-2(abandoned);Printed:1/30/2004 13 of 28 <br />