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HISTORICAL SUMMARY OF ANALYTICAL RESULTS <br /> GROUNDWATER <br /> FOOTHILL SANITARY LANDFILL <br /> MWA <br /> Units:m n,unless noted - - - <br /> amp a esigna ion <br /> Sampling Date 7/7/98 10/9/98 1115/99 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 90/29/01 2/6/02 4/30/02 8/1/02 <br /> Monitoring and Field Parameters <br /> General Water Quality Parameters <br /> Tem ature CMfield) 22.7 _2_0.8 18 20.8 20.1_21.3_ 18.2__23.3_ 20.5 19.8 17.8 20.0 20.4 19.2 16.6 18.6 20.7 <br /> ChTonde 6.5 6.4 0.23 8.2 6.7 6.09 6.79 6.74 6.03 4.29 6.55 6.23_ 5.8 <br /> _Nitrate- itro en 12 2.8 2.3 2.6 2 2.44 _2.37 2.5j------__2.28___3.6_5_--2 7 -2-1T-1 <br /> 1 2.5 2.3 3 2.6 <br /> 2 9 <br /> Total Dissod Solis _ 202 176-162-1 65 182 187 180 194 186 184 183 219 180 _160 f1-T-1_ 90 170 <br /> __. _ _ 6.4-_ ..6.5 -6.5 5.9 -6.3 7.43 7.6 7.55 6.48 <0. - . 6_ <br /> Sulfate __ _ 6.91'--'-- <br /> _ <br /> _ _ <br /> std..uriifs_field---- - � -- 8.22 6.93 _ 8.37 _-7.08 - 7.77 8.06 7.37 7.52 8.5 6.61 7.41 6 92 8 09 6 29.. , 8.91 6.79 _ <br /> Electrical Conductivity um osos c�237 251 243 235 236 237 " 237 242-----240 240 284 710 220 400- 100 280 270- <br /> MA <br /> Tlectri NTU�ield 4 2.9 L� 3.25 1.43 1.23 1 4.02 0.49 0.27 2.51 12.4 10 11.7 <br /> Calcwm <br /> Potasswm _ <br /> -Ma nesium ---------- --- <br /> -So lum _ ---- __._ <br /> Volatile Organic Compounds(ug/I) <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.06 <0.18 <0:08_ <0.06 <br /> -- <0.89 <0.89 <0.89 <0.89 <0.89 _ - _ . < . -- < -- -< --<0.05 <br /> Trichloroethene TCS <0.05 <0.06 0.06<0.06 <0.06 0.06 <br /> <0 06 <br /> 1 -Dichloroet ene <0.72 <0.72 <0.72 <0.72 <0.72 <0.04 <0.04 <br /> Chloroform <0.83 <0.83 <0:83 <0.83 <0.83 <0.06 <0.07 0.162* <0.07 <0.07 <0.07<0.07<0.07<0.07<0.18<0.07 <0.07 <br /> <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 <br /> Benzene <0.21 - <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.21 <0.24 <br /> _ <0.78 <0.78 <0.78 <0.21 - - <0.07 <0.07 <0.16 <0.07 <0.07 <br /> -yam-- 2.6 < <0 07 <0.07 <0.07 _ <br /> <0 07 <0.07 <0.03 0 07 <0.06 <0.06 {2.4 0.15 <br /> <0.06 <br /> oro enzene <0.03 0.0448* <0.03 <0 06 <0.06 <0.06 <0.06 <1.8 - <1.8 30 <br /> eth ene one 2,61�<1.79 <1.79 <1.79 <1.79 <1.8 {6.8} �} <br /> _ cetone <0.1 <0.1 <0.1 <0.1 <0.1 <U.1 <0.46 <0.10 <0.10 <br /> amt alene 0.0859" <0.08 <0.08 <0.18 <br /> teeth ter- uty et er 0.178- <0.07 <0.07 <0. <0.07 <0.07 <br /> o uene <0.11 <br /> <U.11 <0.23 <0.11 <0.11 <br /> 1,4-Dichioro enzene <0.08 <0.08 <0.22 <0.08 <0.08 <br /> etloroethene {1.9} <br /> <0.65 <0.70 <0.70 <br /> 2-Bututanone <0.20 <0.09 <0.09 <br /> 1,3-Dichloro ro ane <0.14 <0.14 <br /> hloromethane <br /> 1,2,4-1 nmethyibenzene <br /> 1,3,5-1 nmeth (benzene <br /> Constituents of Concern Parameters <br /> Semivolatile Organic Compounds <br /> (EPA Method 3520/8270) <br /> All Compounds NR NR NR NR NR ND NR NR NR NR NR NR NR NR NR NR N <br /> Organochlorine Pesticides and Polvchlorinated Bipherl <br /> (EPA Method 3510/8080 <br /> AICompounds NR NR R NR NR ND NR NR NR NR NR NR NR NR NR NR <br /> Trace Concentration <br /> [11 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 /> 5of2Q <br /> MW-1•Printed:1/30/2004 <br />