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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MW-1 <br /> Units:mmRA,unless noted <br /> ampleUesignna ion -1 MW-1 MW-1 MW= <br /> Sampling Date 10/14/02 1/29/03 5/30/03 8/13/03 <br /> Monitoring and Field Parameters <br /> General Water Qualily Parameters <br /> emperature(' ie 20.4 16 23.8 21. <br /> Chloride 9.2 6.7 NIVI 6. <br /> itrate- itrogen .2 .3 <br /> Too sso vea Solids 360 180 NIVI 170 <br /> Sulfate 5.8 6.5 NM 6.3 <br /> s .un is ie 6.74 6. 7.8 7.42 <br /> ectnca on uc vi umhos/cm 250 379 234 208 <br /> rm ie .9 2.9 0.7 12.6 <br /> uNM 19 19 <br /> Potassium NM 3.3 <0.92 <br /> Magnesium NM 9.8 9.7 <br /> Sodium NM 11 11 <br /> Volatile Organic Compounds(ug/i) <br /> Tnchloroet et e T ) <0.2 <0.36 NIVI <0.36 <br /> 1,1-D ch oroet ene <0. <0.24 NIVI <0.24 <br /> oro orm <0.3 <0.37 NM <0.37 <br /> Benzene <0.20 <0. NM <0.28 <br /> m/p- ylene <0.20 <0.38 NIVI <0.3 <br /> Chlorobenzene <0.2 <0.32 <br /> at= <br /> a Chloride <0.3 <0.23 .{ 4*} <br /> cetone <2.0 {2.5} NM {1.0*} <br /> _ apt alene <0.3 <0.93 M <0.9 <br /> Methyl tert- utyi ether 5.3 <0.36 NM <0.36 <br /> Toluene <0. <0.32 NIVI <0.32 <br /> 1,4-Dichlorobenzene <0.2 <0.46 NIVI <0.46 <br /> etrac loroethene <0.3 <0.4 <0.44 <br /> - utanone <2. <0. <0.14 <br /> 1, - is loropropane <0.2 <0.40 NM <0.40 <br /> Chloromethane <0.3 <0.18 {0.1 } <br /> 2 4 Trimethy enzene N <0. <br /> 1,35-Trimethylbenzene NM <0.28 <br /> Constituents of Concern.Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR <br /> Organochlorine Pesticides and Polychlorinated Biohenvl's <br /> (EPA Method 3510/8080) <br /> Compounds 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 7 of 28 <br />