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0 <br />HISTORICAL SUMMAR NALYTICAL RESULTS <br />GRO ATER <br />FOOTHILL SANITARY LANDFILL <br />LW -1 <br />Units: m2/i, unless noted <br />amp a Designation LWA LWA- A LWA LWA- - L-LWA LWA- - - <br />Semolina Date 7/10/89 10/20/89 1/17/90 4/4/90 7/12/90 10/2/90 1/7/91 4/2/91 7/19/91 10/9/91 1/10/92 4/3/92 7/1/92 10/2/92 1/5/93 4/1/93 7/1/93 <br />Monitorina and Field Parameters <br />Nitrate -Nitrogen 1.3 1.3 1.2 1.2 NR NR NR NR 1 1.1 1.1 1.2 1.2 1.2 1.1 <br />—Total –Disso Dissolved Solids 175 180 150 196 106 194 7� 9 198 164 192 50 210 220 220 240 200 2T6 <br />u ate 13 2.3 14.8 14.6 14.5 13.9 11.5 14.6 14.3 14.4 15 18 14 14 14 14 1 <br />Magnesium <br />Sodium <br />m/p-Xylene <br />L loro enzene <br />Methylene Chloride <br />--Acetone <br />1,4 -Dichlorobenzene <br />etrac oroet ene <br />1, - i oropropane <br />oromethane <br />1, - nmet ylbenzene <br />3,5- nmet ylbenzene <br />Constituents of Concern Parameters <br />Semivolatile Organic Compounds (EPA Method 3520/8270) <br />All Compounds NR NR NR NR NR NR NR NR NR NR NR NR NR 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 />LWA; Printed: 08/11/2005 17 of 32 <br />