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~a UI CD CD :::!. g: 3 3 :D CD CD :I UI _c: ~;: as. '<0 c:c: :. e!. - -. =e'1 III 0 lito .. 3- ;:2- III en iil III ...3 lS'g, Y'tS ~s. en c: ::l III ~ ::E III - CD .. - o .. :;: CD c: '0 '0 CD .. o o 0' iil c. o :D <' CD .. z a o' :I e!. ::E III - CD .. b c: e!. ~ ... CD Table 9. Comparison of environmental and concurrent- and sequential-replicate samples for general chemical constituents-Continued [Env., environmental sample; Rep., replicate sample; Diff. I, difference in units of constituent; Diff. 2, difference in lowest rounding unit; mg/L, milligrams per liter; Ilg/L, micrograms per liter; shaded cells represent differences greater than plus or minus I lowest rounding unit; lowest rounding unit is equal to the magnitude of the least significant figure; IlS/cm, microsiemens per centimeter at 25 degrees Celsius] Silica Iron Manganese Station Date Env. Rep. Diff.1 Env. Rep. Diff.1 Env. Rep. Diff.1 (mg/L) (mglL) (mglL) Diff.2 (llg/L) (llg/L) (Ilg/L) Diff.2 (Ilg/L) (Ilg/L) (Ilg/L) Diff.2 Concurrent replicates State Line 091096 12 12 0 0 3 3 0 0 2 1 1 1 Cameo 051396 8.6 8.7 -0.1 -1 16 17 -1 -1 Gunnison at 32 Road 071895 9.1 9.1 0 0 21 21 0 0 East 113095 6.7 6.8 -0.1 -1 3 3 0 0 3 3 0 0 East 051696 25 25 0 0 10 10 0 0 Gore 082396 5.2 5.1 0.1 1 5 4 1 1 2 2 0 0 Baker 081895 6.9 6.9 0 0 190 200 -10 -1 12 12 0 0 Maximum difference -0.3 -3 -60 -60 :t1 :t1 Percent of samples with 43 43 43 43 71 71 no difference Percent of samples 86 71 100 within plus or minus 1 lowest rounding unit Sequential replicates Dotsero 032096 21 21 0 0 Reed 112295 100 100 0 0 Baker 022796 37 37 0 0 Maximum difference -20 -2 0 0 Number of samples with 0 0 3 3 no difference Number of samples 2 3 within plus or minus 1 lowest rounding unit