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DATA SUMMARY GROUND WATER WELL 20-1 CONTINUED JULY 1, 1999 -APRIL 30, 2000 Well ID 20-1 20-1 20-1 20-1 20-1 Sample Date 7/25/99 8/27/99 9/26/99 3/1/00 4/24/00 Sample Type' Primary Prima Primary Prima Prima Completion Horizon Dissolution Dissolution Dissolution Dissolution Dissolution Parameter (mgA)" Bromitle 5 <2 <2 <10 <0.5 Carbon, dissolved organic 43 26 3 50 47 Cation-Anion Balance % -0.5 -2.9 20 -1.1 9.5 Sum of Anions meq/L 1080 1020 880 949 610 Sum of Cations meq/L 1070 962 1320 928 738 Chloride 14200 12100 5480 10000 9400 Cond @ 25C(umhos/cm) 68900 54900 56700 56800 3320 Rluoride 44 39 47.4 38.2 30.4 Hardness as CaC03 <1 <1 17 66 Nitrate as N, dissolved <0.2 <0.4 <0.4 <0.2 <0.2 Nitrate/Nitrie as N, dissolved <0.2 <0.4 <0.4 <0.2 <0.2 Nitrite as N, dissolved <0.1 <0.2 <0.2 <0.1 <0.1 pH (units) 7.8 7.8 7.7 7.9 8.5 Phosphorus, dissolved 8.2 5.8 4.3 6.7 6.6 Phosphorus. ortho dissolved 11.6 5.5 1 6.06 7.64 Total Dissolved Solitls 59000 57300 63600 56200 43800 Sotlium Absorption Ratio in H2O <0.03 <0.03 3170 1140 <0.03 Sulfate 200 100 <10 60 70 Sulfide as S 1.3 0.51 1.7 8 20 TDS (talc) 59100 54500 58100 51200 37200 TDS ratio 1 1.05 1.09 1.1 1.18 Temperature 17.6 15.9 15.6 9.8 12.4 Gross Alpha Result (pCi/L) 770 0 0 0 92 Gross Alpha Error (pCi/L) 420 600 400 260 180 Alpha Minimum Delectable Activity (pCi/L) 300 410 370 300 140 Gross Beta Result (pCi/L) 520 500 72 7.7 100 Gross Beta Error (pCi/L) 290 280 280 290 170 Beta Minimum Detectable Activity (pCi/L) 390 380 370 440 220 ' Sample Type =Primary (one sample is represented), =Average (duplicate samples are averagetl). "Constituents reported in mg/I unless otherwise nosed. A symbol "<" before a number intlicates that the value is not detedetl. The number following "<° is the analytical limit of deledion based upon the method and the sample malriz.