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HISTORICAL ANALYTICAL RESULTS <br /> GROUNDWATER <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> MW-4 <br /> Units:m n,unless noted <br /> amDesignation <br /> Sampling Date 01/25/02 04/22/02 07/22/02 10/03/02 01/09/03 04/24/03 07/28/03 10/08/03 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature Field(°C) 19.6 X8.6 20.7 21.0 16.2 21.1 23.1 23.4 <br /> 24 <br /> Chloride 0 200 190 200 150 180 190 200 <br /> Nitrate-Nitrite as Nitrogen 16 13 15 15 13 10 12 12_ <br /> ota Dissolved$oiids 1,600--1 600 1,50_01,6_0_6_1,4_ 00 1,500 1,500____1_,500 ___ <br /> (fate 740 650 600 620 570 610 580 580 <br /> pH,field(units) 7.07 6.64 7.10 6.76 6.84 6.96 7.22 7.35 <br /> Electrical Conductivity field(umhos 2 010 460 aso 340 1,840 1,036 2,166 2,178 <br /> Turbiti ,Field(N I U 29.7 18.8 31.7 24.4 12.1 31.4 84.7 21.6 <br /> Calcium 180 NR NR NR 180 <br /> Potassium <0.92 NR NR NR 5.9 <br /> Ma nes72-MR-MIR NR 69 <br /> odiium um 200 NR NR NR 200 <br /> Volatile Organic Compounds(uqA) <br /> Acetone NIVI <1.8 <1.8 <2.0 {0.62*} <0.52 (0.84*}_{0 67*} <br /> Benzene <0.14 <0.050 <0.050 <0.2 <0.28 <0.28 <0.28 <0.28 <br /> Bromomethane (0.75*) <0.61 <0.61 <0.61 <br /> 2-Butanone NM <0.70 <0.70 <2.0 <U.14 <0.14 <0.14 <0.14 <br /> Chloroform <0.18 <0.07 <0.07 <0.3 <0.37 <U.37 <0.37 <0.37 <br /> Chloromethane <0.088 <0.14 <0.14 <0.3 <0.18 <0.18 <0.18 <0.18 <br /> -- <0.2 <0.31 <0.31 <0.31 <0 31 <br /> -Dlch�orodi uoromethane <O.f5 <0 09 <0.09 -- -- <br /> -- <br /> <0 <br /> 22 ---- - -- - --- <br /> 1,f=DTchloroethane _ <br /> cis-1,2 Dictiloroethene T -<0.15..__<0.09 __ _<0.09 <0.3_ <0.31 <0.31 <0.31 <0.31 <br /> - --- . - -- - -- <br /> trans-1.2-Dic oroethene <0.13 <0.- <0.09 <0.2<0.26 <0.26 <0.26 <br /> 1,2-Dic /oro ropane <0.16 <0.07 <0.07 <0.2 <0.32 <0.32 <0.32 <0.32 <br /> ethylene h oride <0.11 <0.06 <0.06 <0.7 <0.23 (0.32*} <6 0110} <br /> -fv�et yy�I tert-butyl ether <0�8 <0.08 <0.08 <0.3 <0.36_<0.36 <0.36 <0.36 _ <br /> 6Ta 6halene <O.d6 <0.10 <0.10 <0.3 <0.93 <0.93 <0.93 <0 93 <br /> etrach oroet ene <0.22 <0.08 <0.08 <0.3 <0.44 <0.44 <0.44<0.44 <br /> --To uene <0.16 <0.07 <0.07 <0.2 <0.32 <0.32 <0.52 <0.52 <br /> -Ynch o fluoromethane <br /> -------------<0_11 <0.07 <01.07 <0.4 <0 2 <0.42 <0.- <0.42 <br /> Trichloroethene <0.18 <0.06 <0.06 <0.2 <0.36 <0.36 <0.36 <0.36 <br /> 1,2,4- nmeth (benzene <br /> Vinloride, <0.08 <0.06 <0.06 <0.2 <0.18-4.16 <0.16 <0.16 <br /> m, - ene <0.24 <0.21 <0.21 <0.2 <0.38 <0.38 <br /> o- ene <0 2 <br /> Organic compounds detected in one or more samples are listed. <br /> [1]=This analytical result appears to be anomalous and therefore was not used in the statistical evaluation procedures. <br /> (1)=Also found in one or more quality control blanks(indicated for data from 10-13-99 to present) <br /> *=Trace concentration <br /> NR=Not Requested <br /> MW®A;Printed:1/16/2004 13 of 28 <br />