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HISTORICAL ANALYTICAL RESULTS GROUNDWATER CORRAL HOLLOW SANITARY LANDFILL MW-5 Units:man,unless noted amp a esignation - _ _ _ _ _5 _ _ MW-5 MW-T-IVVT-7 Sampling Date 12/1/97 2/2/98 4/15/98 7/16/98 10/30/98 1/19/99 4/19/99 7/19/99 10/13/99 1/20/00 4/24/00 7/31/00 10/18/00 1/31/01 4/23/01 7/26/01 10/16/01 Monitoring and Field Parameters General Water Quality Parameters Temperature,Field(°C) 21.5 22.0 20.4 26.6 23.9 22.7 24 24 3 23 5 21 4 24 9 27.4 24.8 22.0 23.7 29.5 16.6 Chlonde 69 84 86 80 93 79 75 83 70.7 85.8 89.0 81.9 91.5 92.0 88.8 86.0 94.0 Nitrate-Nitrate as Nitrogen 45 19 16 16 16 16 12.6 14 13.6 14.3 14.6 14.1 14.4 12.1 14.4 15 14 Total Dissolved Solids 699.0 667.0 630 654 707 703 649 675 728 760 753 721 750 766 722 710 700 ui ate 16 14 14 14 15 15 13 13 13.2 26.9 16.2 14.1 14.4 16.3 14.2 26 14 _ply,field(units) 7.28 7.65 7.09 7.72 7.26 7.01 6.59 6.8 6.56 7.87 7.24 6.87 6.75 7.26 6.58 6.91-0-5- Electrical Eectnca onducUwty,fied um o: 1,076-1,227 1,240 1,091 1,205 1,180 1,219 1,214 1,233 1,28220 1,172 1,23558 990 ,1-80 1,04b Tur6itity,Field(NTU) 6.32 36.6 2.8 1.2 3.6 TO-973- 2.1 1 8 05 6.57 5 W 7.71 15.70 31 0 84.00 74.60 Calcwm Potassium Maggneswm --- ---- - - ---Sodium - Volatile Organic Compounds(ug/1) _ Acetone - <0.80<0.80 <0.80 <0.80 <2.0 <080 <0.80 ---d0---80-- Benzene 0 80Benzene ND ND ND ND ND ND ND ND 0.159* <0.22 0.376 0.115* 0.202* 1.29 0.201* 0.24* 0.12* Bromomethane - 2Butanone Chloroform__ ND ND N<D1 <0N.8D <0N.8D3 <0N.8D3 <0N.8D3 <0N.8D3 0.4<202.7* <-I N4R3 <0.7 0.4<007.7* 0.4<504.*7 04<0.7 _<3 __ {Chlorometane 88 01*.7} {0.<309*.7}_ Dichlorodifluoromethane 30 74 210 9.3 19--22-1 30 <0.19 8.07 5.1-0 1-67 7.7 7.39 6.94 9.22 4.6 9.2 1,1-Dich oroet ane ND ND ND ND ND ND ND ND 0.244* <0.16 4.44 0.279* 0.289* 0.313* 0.259* 0.26* 0.26* cis-1.2-Dichloroethene ND ND N D- ND ND ND ND N20.138 <0.2 0.232 0.188* 0.2 8* 0.270* 0.197* 0.18 20 0 trans-1.2-Dic oroet ene ND ND RD ND ND ND ND 0.0598 0.22 <0.09 <0.09 <0.0 <0.09 <0.09 <0.09 0.091 1,2-Dichloropropane ND ND ND ND ND ND ND ND 0.145* <0.17 0.145 0.164* 0.186* 0.180* 0.181* 0.17* 0.18* _ e-Aetthylene Ch or de <7.1 <7.1 <7.1 <7.1 <7.1 <7.1 <7 1 <7 1 _{1.34} <2.14 1.21 {1.04} {1.29 {1.1}x.15} (0..98y-0.94} Methyl cert-butyl emer 0.773 0.103 <0.08 <0.08 <0.08 Napthalene 0.13* <0.1 <0.1 4.1 <0.1 <0.1 I etrachloroethene 5.1 4.2 3.6 3.3 4.2 4 4.8 3.9 5.39 3.94 4.02 4.79 5.56 4.55 5.64 4.9 5.5 Toluene 0.664 <0.07 0. 9 <O.07 1,2,3- r oro enzene <0.12 < < 1 Trichlorofluoromethane 3.8 3.9 3.1 2.2 4 3.1 3.6 2.2 3.81 <0.39 2.86 3.57 3.79 3.53 4.01 3.1 4.2 Trichloroethene ND ND ND ND ND ND ND ND 0.663 <0.26 0.569 0.689 0.818 0.744 0.778 0.75 0.76- 1,2, nmethylbenzene -i/myi Chloride <1 1.2 <1 <1.9 <1.9 <1.9 <1.9 <1 9 0.621 <0.41 0.404 0 576 0.576 0.714 0.606 0.55 0.57 m ytene 0.557 <0.21 <0.21 <0.-N o amylene 0.0726* 0 619 <0.07 <0 07 <0 7 rganic compounds detected in one or more samples are listed. [1]=This analytical result appears to be anomalous and therefore was not used in the statistical evaluation procedures. {1}=Also found in one or more quality control blanks(indicated for data from 10-13-99 to present) *=Trace concentration NR=Not Requested MW-5;Printed:1/15/2004 19 of 28