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TABLE 24. WATER QUALITY IN RALSTON CREEK
<br />1998.2007
<br />STATION SWLLHG
<br />_ _......_ _ ......... ...... . .... ~,.,, ~ .,~ ~~su ~ ur cuu i un stnu l HG sw1LHG SW-LLHG SWILHG SW4.LHG SW4.LHG SWILHG SW-LLHG SW-LLHG SWILHG SW-LLHG SWLLHG SW{LHG
<br />em> sne/02
<br />S W-LLHG SWILHG SW-LLHG $W-LLHG SW-LLHG SW-LLHG SW-LLnc~ svw.~n~ avv~~nv o.rz~.,.~ ~••~~~~~ ~•---••- _.. __.
<br />9/13/89 12/21/00 129/01 228/01
<br />327/01 4/18/01 529/01 6/19/01 7/11/01 ,,,mo o,,,,
<br /> 1021/98 11/t8/98 12/17/98 1/19/98 2/15/99 3/15/99 4/19/89 5/17/99 6/14/99 7/14/99
<br />pH (s[d units) 7.8 8.3 7.7 7.7 8.5 7.8 7.7 7.3 7.6
<br />177 8
<br />444
<br />238
<br />Contluctivtty (urMOS) 469 482 517 570 601 420 308 143 132 308 n4
<br />Total dissoNetl solids 303 302 339 352 362 319 1 B7 112
<br />5 <10 <70
<br />Total sus ended so9ds 2 2 1 1 1 1 36.9 . .
<br />MaMness, total 150 160 160 130
<br />125
<br />CaNOnate 98 8
<br />Bicarbonate 70 38 47 100 81 103
<br />Alkalis ,Dissolved
<br />total
<br />Alkalinity
<br />98 100 110
<br />110
<br />230
<br />88
<br />70
<br />38
<br />,
<br />NRrate Nihogen 0.8 1.8 1.7 1.7 1.7 0.8 0.5 <0.1 0.8
<br /><t <0.5
<br />41'6
<br />Ammonia, total 0 0 0 0 0
<br />42 0 0 <1.
<br />14.2 <t.
<br />17.3 , 33.5 3B
<br />18 19.3
<br />Calcium 35 36 36
<br />38 45 24
<br />52 48 8.9 10'7 32'4 12 14'7
<br />Sodium, dissolved 42
<br />15 16 16 17 15 4.5 5.5 14.2 2.4 2.4
<br />Magnesium, dizsoNed 5
<br />5 2
<br />2 7
<br />2 2.9 1.2 1.1 2.3 51 68.2
<br />Potassium, dissolved .
<br />.
<br />2.7
<br />110 130 130 .
<br />160 160 91 62 17 17 99
<br />Sulfate
<br />Fluoride, total 0.5 0.5 0.6 0.8 0.6
<br />16
<br />13
<br />9
<br />13
<br />76 28 22'7
<br />Chloride 78 16 16 14 15 <0.1
<br />Phosphorous
<br />Ned
<br />di 5 <0.5
<br />5 <0
<br /><0 <0.5 0.2 <0 1
<br /><0 1 0'~
<br />zso
<br />Aluminum, .
<br />. <0.05 <0.001
<br />Aluminum, total
<br />Amtimony, dissolved <0.03 <0.008 0.003 0.006 <0.003 <0.006 <0.006 <0.006 <0.05 <0.001
<br />Antimony, total
<br /><0.005
<br /><0.005
<br /><0.005
<br /><p
<br />001
<br /><0.01
<br />Asenk, dissolved
<br />Arsenic, total <0.05 <0.003
<br /><0.003 <0.003 <0.003
<br />1
<br /><0
<br /><0.1
<br /><0.1 ,
<br />Barium, dissolved 0.04 0.03 .
<br />Badum, total
<br />dizsoNed
<br />Be lium 0.04
<br /><0.001 <0.002 <0.002 0.04
<br /><0.002 0.04
<br /><0.002
<br /><0.001
<br /><0.001
<br /><0.001
<br />,
<br />Boron, total
<br />dizsoNed
<br />Catlrtdum
<br /><0.002 <0.0002 <0.0002
<br /><0.001
<br /><0.0002 <0.05
<br /><0.001 <0.05 0.06
<br />,
<br />Chromium, dissolved <0.005 <0.005 <0.005 c0.005 <0.005 <0.005
<br /><0.01
<br />C aside, total <001 <0.01
<br />Copper
<br />d
<br />Oi
<br />N
<br />02 <0.02 <0.02
<br /><0
<br /><0.02
<br /><0.005
<br /><0.005
<br /><0.005
<br /><001
<br />0.002
<br />sso
<br />a
<br />Capper, . <0.03 0.39
<br />CoPPer, total
<br />Iron, dissolved 0.05 <0.03 <0.03 <0.03 <0.03 0.2 0.1 0.04 0.455
<br />Iron, total
<br />Iron, suspended 0.065
<br />Iron, Ferrous (Fe2+)
<br />Iron Ferric (Fe3~) <0.005 <0.005 <0.005
<br />05
<br /><0
<br /><0.001
<br />Lead, dissolved <0.05 <0.002 . 0.07
<br />Lead, total <0.002 0.002 <0.002
<br /><0
<br />01 <0.01
<br /><0.01
<br />Manganese, dissolved <0.01 <0.01 <0.01 <0.01 . <0 p1
<br />Man anese, total
<br />Mercury, dissolved
<br /><0.0002 <0.0002 <p.0002
<br /><0.0002
<br /><0.0002
<br /><0.001
<br /><0.0001
<br />0.0281
<br />Mercury, total 21
<br />21 0
<br />186 0
<br />0 0.25 0.31 0.014 0.018 0.09 <0.1
<br />Motybdenum, dissolved .
<br />.
<br />.
<br />04 <0.04
<br />02 <0
<br /><0 <0.04 <0.04 <0.01 <0.01 <0.07
<br />Nickel, dissolved
<br />N
<br />tl
<br />i .
<br />.
<br />05 <0.005 <0.005
<br /><0 <0.005 <0.005 <0.01 <0.01 <0.01
<br />e
<br />Selenium, d
<br />sso
<br />dissoNetl
<br />Silver .
<br /><0.005 <0.001 <0.0002 <0.0002 <0.0002 <0.01 <p,01 <0.001
<br />001
<br /><0
<br />,
<br />Silver, total 001 <0.001
<br /><D
<br />OS <0 <p,001 <0.001 <0.001 <0.001 <0.001 <0.001 .
<br />Thallium, dissolved .
<br />.
<br />01 <0
<br />01 <0
<br />01 <0
<br />01 <0,01 <0.001 <0.001
<br />Vanadium, dizsoNed .
<br />c0.005 <0. . .
<br />Thallium, total
<br />Zinc, dizsoNed
<br />0.006 <0.005 <0.005
<br />0.005 <0.01 <0.01 <0.01
<br /><p.pt
<br />38
<br />
<br />0204
<br />019 0
<br />0
<br /><0.005
<br />0202 0.0259 0.0278 0.0252 0.0414
<br />0138 0
<br />0
<br />
<br />0.01
<br />Zinc, total
<br />0088
<br />0052
<br />0
<br />0085
<br />0
<br />0
<br />0027
<br />0.0025
<br />0.0147
<br />0.0275 0.0336 0.0265
<br />0.01 0.004 0.0103 0.0091 0.073 0.02
<br />0003
<br />7 0
<br />.
<br />.
<br />2
<br /><0
<br />0003 <0
<br />.
<br />.
<br />0039 <0.0003 <0.0003 <0.0003 <0.0003 <0.0003
<br />0
<br /><0.0003
<br />Uranium, dissoNetl 0.0098 0.0169 0.0089 0.0081 0. . .
<br />003 .
<br /><0
<br />002 002
<br /><0 <0
<br />002 0.002 0.002 0.002 .
<br />0.002 0.0004 0.0007 <0.0003 0.006 .
<br />. .
<br />Uranium, suspended 0.0001 0.0001 0.0001 0.0001 0.0001 0.0 . . .
<br />Uranium, total 0 1
<br />Thorium228, dis. CUL 0
<br />0.4
<br />Thodurr~230, dis. (pCilL) 6 0
<br />4
<br />6 2
<br />1 1
<br />1
<br />1.3 0.8
<br />0.9 0.8 0.7 1.1 <0.2 0.9
<br />Thorium-232, dis. (PCdL) 0
<br />3
<br />0
<br />0.5
<br />0.1
<br />3.9
<br />1.6 1.6 1
<br />.
<br />.
<br />.
<br />7.2 0.6 0.9
<br />06 <0
<br />2
<br /><0
<br />0
<br />2 <0
<br />2
<br />0.3 <0.2 0 0.4 <0.2 <0.2
<br /><0.2
<br />Radium-226, dis. (pCi/L) 0.4 0.9 0.5 .
<br />0 0
<br />1 0 0.1 D 0 .
<br />.
<br />0.1 0 0.1 <0.2 .
<br />.
<br />Radiurn-226, sus . Ci2 0 0.1 0 .
<br />Radium•226, total (pCUL) 3
<br />1 30
<br />Grass Alpha, dis. (pCilL) 6 13 5.8 ,
<br /><5 27
<br />Gross Bela, dis. ilL 4.3 8.5 1.6
<br />NOTES'. Mean and nredian statistic calculated using one-half detection Gmd (12 D.L.;
<br />ND = number of nonaetects
<br />Results are in mg/L unless otherwise noted
<br />Whebtase.4u4rdareerl
<br />Page 20 of 25
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