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HISTORICAL SUMMARY OF ANALYTICAL RESULT: GROUNDWATER NORTH COUNTY SANITARY LANDFILL Sample Type:Water G-2&G-3 Units:m I,unless noted amp a Designation - - - - - - -2 -3 -3 -3 -3 Samplin2 Date 12/1/94 1/3/95 4/3/95 7/7/95 10/2/95 1/2/96 4/5/96 7/10/96 11/8/89 11/6/90 1/24/91 4/10/91 7/22/91 4/2/92 7/2/92 4/8/94 Monitorina and Field Parameters General Water Quality Parameters Temperature °C) 19.0 18.2 21.0 2.5 21.3 18.8 21.5 20.7 NR NR NR NR R NR h ori a 7.4 8.1 6 6 7 7 7 38 12 6 6.9 9 9 18 5 Nitrate Nitrogen 1.5 1.3 1.4 1.5 1.3 1.2 1. 1. 1.3 .1 .4 1.3 1.2 1.1 <0.1 1.6 Total Dissolved Solids 189 18 22 280 210 230 22 310 0 165 230 170 180 340 17 ulfate 3.5 3.5 trace 3 5 4 trace 4 NR <8 <8 <8 <8.0 <8 5 <8 H st .units 7.22 7.82 7. 8 .18 7.13 7.38 6.97 7. 1 7.36 7.43 3.58 7.35 7.49 7.1 7.03 7.16 E ectricel onduotivity um os cm 236 2 0 20 237 241 3 21 4 30 53 220 229 206 218 45 153 u i ity NT field 1.7 1.0 0.2 N 5 7.2 3 2.9 N NR NR NR NR NR Volatile O anic Compounds(ug/1) Acetone <4.4 <4.4 < < <2 <2 <2 <10 27 NR NR NR NR NR NR Acetonitrile NT NT NT NT KIT NT NT NT NT NT NT NT NT N Acroein NT NT NT NT NT <4 < <4 N NT NT A ondn a NT NT <2 < <2 N N NT NT N II oxide NT NT NT NT NT NT NT NNT N Benzene <0. 6 <0. 6 < <0.5 <0.5 <0.5 < .5 < ,5 <1 <1 NRN N NR romobenzene NT NT NT NT NT <0.1 <0. <0.1 NT N NT NT NT NT NT ---N-T- Bromochloromethane NT NT NT NT <0, <0.2 <0.2 NT NT NT NT N NT NT N Bromodichloromethane NT NT N NT <0.4 <0.4 <0.4 NT NT NT NT NT NT NT NT Bromoform NT NT NT NT NT <0.2 <0.2 -<-O-.Z NT NT NT NT NT NT NT NT Bromomethane NT NT NT <0.2 <0.2 <0.2 NT N r NT NT NT NT N -butanone NT NT NT T NT <2 <2 <2 NT N N NT NT N N n-bu benzene NT NT N T NT <0.3 <0.3 -<-0-3 NT NT NT N N NT sec u benzene N NT NT T NT < .3 <0.3 < .3 N N NT NT N N tett- u enzene <0.3 <0.3 <0.3 N NT N TNT Ca on isuifide NT N N <0.4 <0.4 <0.4 NT NT NT NT N Carbon tetrachloride NT NT NT NT N <0.5 <0.5 <0. NT 0.4 NT NT N Chlorobenzene N NT <0.1 <0.1 <0.1 NT NT NT NT NT N h orae ane <0.50 <0.50 <0.5 <0. < . <0.3 NR <0.3 <1 <1 NR NR NR -ch oroeth I vinyl ether NT NT N N NT NT NT N ---NT- Chloroform NT NT NT NT NT <0.2 <0.2 <0.2 NT NT NT NT NT NT NT NT Chloromethane, N NT N < <0.3 <0.3 NT NT NT C oroprene N N NIT NT NT NT NT NT NT NT NT NT NT 2- lorotoluene NT N N N <0.2 <0.2 <0.2 NT T T 4- lorotoluene NT NT NT NT NT <0.2 <0.2 <0.2 NT NT NT NT NT NT N NT dibromochloromethane NT NT NT NT NT <0.1 <0. <0. NT NT NT NT 1,2 i tomo-3-chloropane NT NT NT N NT <0.3 <0.3 <0.3 NT NT NT NT NT N NT 1,2-dibromoethane NT NT NT NT NT NT N NT NT N NT NT Debromomethane NT NT NT NT NT <0.4 <0.4 <0.4 NT NT NT NT NT NT NT NT trans-1,4-dichloro-2-butene NT NT NT NT NT <3 <3 <3 NT N NT NT NT NT NT NT 1,2-dichlorobenzene NT NT NT N NT <0.1 <0. <0.1 NT NT-----N-T- NT NT NT NT NT 1, -Dic orobenzene <0. <0.49 < g <0.1 < .1 <0.1 <0.1 <0.1 <1 <1 NR NR NR NR NR NR 1, i orobenzene <0.43 <0. <0.43 <0.1 <0.1 <0.1 <0.1 <0.1 <1 <1 NR NR NR NR NR NR U10morudifluoromethane N I NT NT NT NT <0.3 < .3 NT NT NT NT NT NT Not equire NT=Not Tested "=Trace Concentration [1] pH meter was not functioning properly. This data point was not used for statistical analysis. [2]This data point appears anomalous and therefore was not used for statistical purposes. G-2&3(ARCHIVE);Printed:7/31/2006 5 of 8