|
<br />........."...,.. \......
<br />'0;;'':;
<br />
<br />Table 1, Statistical summary 01 water-quality data for station 07097000, Arkansas River at Portland, 1986 through 1989
<br />--Continued
<br />
<br /> Number
<br /> Number 01
<br /> 01 meaaure- Standard 1\oenty- Seventy-
<br />Conatltuent mea8ure- menta Mean devl8tlon Illth Median fllth
<br /> menta or lea8 than percentile percentile
<br /> analyses detection
<br /> level'
<br />Dissolved solids, sum of 41 0 258 84 190 285 327
<br />constituents (mg/L)
<br />^"enic. dissolved (l1g/L) 33 27 .53 1.4 .04 ,t4 ,44
<br />Arsenic. total (jIg/L) 18 12 1.2 1.7 ,28 ,63 2
<br />Barium. dissolved (jIg/L) 34 0 56 17 39 60 67
<br />Barium. total recoverable (jIg/L) 19 0 139 88 78 106 182
<br />Cadmium, dissolved (jIg/L) 32 22 .99 1.2 ,30 ,60 1.0
<br />Cadmium, total recoverable (l1g/L) 19 19 NA NA <10 <10 <10
<br />Chromium. dissolved (jIg/L) 32 19 Ll .92 .50 .83 1.8
<br />Chromium, 'otal recnverable (l1g/L) 19 0 7,5 7,8 3 4 10
<br />Cobal~ dissolved (jIg/L) 13 13 NA NA <3 <3 <3
<br />Copper, dissolved (jIg/L) 34 0 5.2 7 2 4 5
<br />Copper, lolal recoverable (J..1.gIL) 18 8 13.7 9,4 7.4 II 20,3
<br />Iron, dissolved (jIg/L) 34 0 46 57 22 30 40
<br />Iron, tntal recoverable (jIg/L) 19 0 3.818 4,112 515 2,400 6.330
<br />Lead. dissolved (jIg/L) 34 25 1.2 2.9 .13 ,37 I
<br />Lead, IOtaI recoverable (jIg/L) 19 10 14 15.3 5 9.4 20
<br />Manganese, dissolved (l1g/L) 34 0 19,7 8.2 13 18.5 27
<br />Manganese. total recoverable 19 0 189 218 47 95 248
<br />(jIg/L)
<br />Molybdenum, dissolved (l1g/L) 34 15 6.5 3.1 4,4 5,9 8
<br />Molybdenum, total recoverable 19 0 8,9 3,5 5 10 12
<br />(jIg/L)
<br />Nickel, dissolved (l1g/L) 34 8 5,8 10.4 Ll 3.5 8,3
<br />Nickel, total recoverable (jIg/L) t9 6 16.2 10.6 9 15 20
<br />Selenium, dissolved (l1g/L) 34 9 L5 ,82 ,89 I 2
<br />Selenium, total recoverable (l1g/L) 19 4 1.5 ,76 I I 2
<br />Silver, dissolved (l1g/L) 33 29 NA NA < I < I < I
<br />Silver, total recoverable (l1g/L) t9 19 NA NA <10 <10 <10
<br />Zinc, dissolved (l1g/L) 34 0 19,9 15,7 8,8 14 30
<br />Zinc, total recoverable (l1g/L) 19 0 123 73 64 1I3 190
<br />Carbon, organic IOtaI (mg/L) 16 0 5,7 4.3 3,0 4.0 7.7
<br />I J( the constituent contains one or more measurements less than the detection level, then the statistic was estimated using the method of Helsel and
<br />Cohn (1988),
<br />
<br />INTRODUCTION 9
<br />
|