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' HISTORICAL ANALYTICAL RESULTS <br /> GROUNDWATER <br /> CORRAL HOLLOW SANITARY LANDFILL <br /> MW-4 <br /> Units:m A,unless noted <br /> Sample Designation - -4 MW4 <br /> Sampling Date 05/17/8810/01/89 12/18/89 03/01/90 06/01/90 09/01/90 12/17/90 03/01/91 06/25/91 09/11/91 12/16/91 03/06/92 06/09/92 09/04/92 12/03/92 03/03/93 06/02/93 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Temperature,Field(°C) NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> hioride 390 321 280 270 280 300 290 300 270 280 310 280 280 250 260 260 280 <br /> Nitrate-Nitrite as Nitrogen 1.4 499[1] 22 6.1 5.7 17 5.2 3.8 6 5.4 5.7 7.1 5.8 7.5 7.8 7.6 6.6 <br /> Total Dissolved Solids 1,800 1,700 1,800 2,000 1,800 1,700 1,700 1,600 1,700 1,700 1,700 1,800 1,800 1,800 1,800 1,800 1,800 <br /> Sulfate 700 637 640 600 590 630 630 590 620 520 630 520 760 1,200 590 580 600 <br /> pH,field(units) NR 7.00 7.60 7.80 7.40 7.50 7.40 NR 7.21 NR NR 7.66 7.64 7.31 7.41 7.45.E <br /> Electrical Conductivity,field(umhos 2,600 223[1] 2,900 2,400 2,700 2,100 2,400 NR 2,130 NR NR 2,060 3,370 1,395 1,873 1,850 ,914 <br /> Turbitity,Field(NTU) NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR NR <br /> Calcium <br /> Potassium <br /> Magnesium <br /> Sodium <br /> Volatile Organic Compounds(ug/1) <br /> Acetone <20 NR NR NR NR NR NR NR NR NR <20 NR NR NR NR NR NR <br /> Benzene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> Bromomethane <br /> 2-Butanone ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> Chloroform <5 NR <0.5 NR N2 NR NR NR NR NR <1 NR NR NR <0.5 NR NR <br /> C oromethane - ------__----.------------ <br /> Dichlorodifluoromethane NR NR NR NR NR NR NR NR NR NR NR NR NR NR <1 NR NR <br /> 1,1-Dichioroethane ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> cis-1,2-Dichloroethene ND ND ND ND ND ND ND ND ND ND ND ND ND ND NO ND ND <br /> trans-1,2-Dichioroethene ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> 1,2-DichloroproUne ND _ND ND ND ND ND _ND ND _ND ND ND ND ND ND ND ND ND <br /> IvlethyTeneChlonde <5 NR� <2.0 NR _N R NR NR NR NR NR <10 NR NR NR <0.5NR NR <br /> MethyTfert-Butyl etfier <br /> <5 -- <br /> -Na tha ene <br /> etrachloroe ene <5 NR <0.5 NR NR NR NR NR NR NR <1 NR NR NR <0.5 NR NR <br /> Toluene <br /> 1,2,3- rich orobenzene <br /> r o oro uoromet aner <SeN < . R NR NR NR N N <1 <0.5 <br /> c oroe ene <br /> 1,2,4- r me enzene <br /> ny Chloride < 0 NR X2.0 NR NR NR-�_NR _ NR'NR Nf7 <1---v-NI ®®NRTNR <0.5 NR -NR <br /> -m,p-x lene <br /> o-XyleneOrganic compounds compoun s etecte 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)=Parameter also detected in one or more quality control blanks <br /> •=Trace concentration <br /> NR=Not Requested <br /> MW-4:Printed:1/15/2004 7 of 28 <br />