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<br />TABLE VI-ll
<br />(Reference 3) VI-15
<br />
<br />~
<br />
<br />TABLE VI-10
<br />(Reference 3)
<br />
<br />ESTIMATED POINT SOURCE, BASEFlOw, AND STORM RUNOFF LOADS
<br />FOR APRil 1980 THROUGH SEPTEMBER 1981
<br />FOR THE SOUTH PLATTE RIVER AT 50TH AVENUE
<br />
<br />(volume in cubic feet, load rn pounds)
<br />
<br />PERCENT EXCEEDANCE OF WATER-QUALITY STANDARDS
<br />FOR AMBIENT AND STORM EVENT MEAN CONCENTRATIONS
<br />FOR APRI L 1980 THROUGH SEPTEMBER 1981
<br />AT SOUTH PLATTE RIVER AT 50TH AVENUE
<br />
<br />April 8O-September 80
<br />Upstream Baseflow I
<br />Upper BilSIn EfflueT'tt"
<br />Lower Basin Effluent'
<br />Dry-Weather Baseflow.
<br />Stormwilter Runoff'
<br />Period Tobl
<br />
<br /> Pe~cent Exceedance
<br />Wate~-Quality St~eam
<br /> Va~iable Standa~'P Units Ambient Sto~m
<br />Dissolved Oxygen 5.0 (mg/L) 0 0
<br />pH 6.5-9.0 (S,U.) 0 0
<br />Fecal Colifo~ms 2000 (#/loomL) 31 100
<br />Un-ionized Ammonia 0.1 (mg/L) 31 0
<br />Nit~ite as N 0,5 (mg/L) 1.4 0
<br />N it~ate as N 10.0 (mg/L) 0 0
<br />Cadmium, Total 1 (jJg/L) 41 100
<br />Cadmium, Dissolved' 5.0 44
<br />Copper, Total 25 (jJg/L) 44 100
<br />Coppe~, Dissolved' 4.0 0
<br />Lead, Total 25 (jJg/l) 29 100
<br />Lead, Dissolved' 2.7 0
<br />Iron, Total 1,000 (jJg/L) 51 100
<br />Iron, Dissolved 300 (jJg/L) 3.4 0
<br />Manganese. Total 1,000 (jJg/Ll 0 100
<br />Manganese, Dissolved 50 (jJg/L) 79 89
<br />Zinc, Total 110 (jJg/Ll 27 89
<br />Zinc, Dissolved' 2.7 0
<br />Chloride 250 (mg/L) 1.6 0
<br />
<br />Ol;tober SO-Much 81
<br />Upltreillm Baseflow'
<br />Upper Buin Efflupnt"
<br />Lower Bnin Effluent"
<br />ory-We..the... Baseflow'
<br />Stormwater Runoff'
<br />Period Tohl
<br />
<br />April 51.September 81
<br />Upstream 8aseflow'
<br />Upper Bnin Effluent"
<br />Lo....er Bnin Effluent'
<br />D"y-We..the,. Baseflow"
<br />Storm......te,. Runoff'
<br />PerIod Total
<br />
<br />Tobl
<br />Volum.
<br />(xl0')
<br />
<br />Tohl
<br />SUI.
<br />p.n<Je;d
<br />SolidI
<br />(.10')
<br />
<br />Total
<br />0"
<br />"anlC
<br />Carbon
<br />(xl0')
<br />
<br />33.0
<br />7.'
<br />33.2
<br />65. ~
<br />28.4
<br />167.7
<br />
<br />0.'
<br />..,
<br />29.7
<br />..,
<br />38
<br />4T7
<br />
<br />0.7
<br />7.0
<br />271
<br />10.6
<br />11.8
<br />5T2
<br />
<br />Total
<br />Nitro-
<br />...
<br />(xlO")
<br />
<br />8.3
<br />57.0
<br />291.0
<br />106.3
<br />67.0
<br />529.6
<br />
<br />0.8
<br />".7
<br />252.0
<br />22.3
<br />5.1
<br />338.9
<br />
<br />1.3
<br />56.'
<br />226.0
<br />35.3
<br />16.2
<br />335.2
<br />
<br />Total
<br />Phol-
<br />phol""ul
<br />(xl0.)
<br />
<br />8.7
<br />12.~
<br />5...
<br />15.2
<br />8..
<br />....
<br />
<br />0.3
<br />14.8
<br />63.3
<br />U
<br />1.6
<br />iIT:4
<br />
<br />0.7
<br />14.6
<br />56.6
<br />31
<br />...
<br />7D
<br />
<br />IB..'eflo.... from up,tre..m sources on South Platte and Be..r CI""I~ek.
<br />'W..,tew..ter from Littleton/Englewood, Lakewood ..nd Glend..le plants.
<br />'Waste....ater fl""Om Central Denver Service ..rea of Metro plant
<br />.Basetlo.... from groundwater and lrr'gatlon return flow,.
<br />'Runoff generated from wlthrn ,tudy ..,.e.. bOl5ln.
<br />
<br />1~,939
<br />513
<br />2,221
<br />615
<br />814
<br />20,102
<br />
<br />150.7
<br />0.'
<br />3.3
<br />121.4
<br />59<
<br />3357
<br />
<br />Total
<br />L..d
<br />(xl0')
<br />
<br />Tot.1
<br />llnc
<br />(wiD')
<br />
<br />901
<br />'"
<br />1,766
<br />522
<br />221
<br />""""3.B21
<br />
<br />1.1
<br />D.'
<br />22
<br />1.6
<br />..
<br />1T9
<br />
<br />17.2
<br />1.2
<br />1.7
<br />27.5
<br />10.4
<br />".0
<br />
<br />48.9
<br />20
<br />10.8
<br />40.5
<br />15.9
<br />118.1
<br />
<br />1,692
<br />479
<br />1,943
<br />641
<br />440
<br />5, 19~
<br />
<br />32
<br />0.'
<br />1.8
<br />20
<br />24.5
<br />32.4
<br />
<br />0.7
<br />D..
<br />1.7
<br />1.6
<br />2.7
<br />7:J
<br />
<br />1.8
<br />1.3
<br />10.7
<br />8.'
<br />'.0
<br />26.l
<br />
<br />1.3
<br />0.4
<br />1.2
<br />3..
<br />5.7
<br />lrl
<br />
<br />3..
<br />15
<br />14.6
<br />13.0
<br />12.2
<br />44.9
<br />
<br />POINT SOURCE. BASFFLOW, AND STORM RUNOFF LOADS
<br />EXPRESSED AS A PE.RCENTAGE OF TOT AL BASIN lOADS
<br />FOR APRIL 1980 THROUGH SEPTEMBER 1981
<br />FOR THE SOllTH PLATTE RIVER AT ~OTH AVENUE
<br />
<br />(pl'rcl'ntage!. do not necessarily add to 100 due to rounding of values)
<br />
<br />'Section 3.8.0 af "Water Quality Standards and Stream Classification,"
<br />Water Quality Control Commission, adopted April 6, 1981, Code af
<br />Colorado Regulations, 5 CCR 1002-8, 1981,
<br />'No standard exists for dissolved form, percent exceedence calculated
<br />on stream standard for total form of same metal for comparison only.
<br />
<br />~ril 80- September 80
<br />Upstream Ba~eflo....] --
<br />Upper SilISon E.ffluent"
<br />Lo....er Bas'n Effluent'
<br />Dr'y-Weather Bueflow"
<br />Stormwater Runoff'
<br />
<br />October 80-MilIrch 81
<br />Upstream aillsefloWT
<br />Upper Burn Effluent"
<br />Lo....er B..sin Effluent'
<br />Dry.We..ther a..seflow.
<br />Stormw..ter Runoff'
<br />
<br />~ril 81-September 81
<br />Upstre..m B..seflow l
<br />Upper a..,," Effluent'
<br />Lowe,. B..sin Effluent'
<br />Dry~We..ther BilIseflo.....
<br />Stormwater Runoff'
<br />
<br />Tot.ll
<br />Votuma
<br />'"
<br />
<br />Total
<br />Sus-
<br />pend.d
<br />Solids
<br />l>)
<br />
<br />79.3 44.9 19.7
<br />2.6 0.3 4.5
<br />11.0 1.0 19.8
<br />3.0 36.2 39.1
<br />4.0 17.7 16.9
<br />
<br />:13.6 9.2 0.8
<br />10.8 5.0 14.5
<br />46 1 18 ~ 61.3
<br />13 7 13.4 14.5
<br />~.8 53.8 8.0
<br />
<br />31.6 9.9
<br />9.2 2.8
<br />37.4 5.6
<br />11.3 6.2
<br />8.5 75.6
<br />
<br />Total
<br />0"
<br />ganic
<br />Carbon
<br />(,)
<br />
<br />12
<br />12.2
<br />47.4
<br />18.5
<br />20.6
<br />
<br />Total
<br />Nitro.
<br />go.
<br />(,)
<br />
<br />Total
<br />Phos-
<br />phorul
<br />("
<br />
<br />1.6 8.8 29.7
<br />10.8 11.6 2.1
<br />54.9 54.7 2.9
<br />20.1 15.3 47.4
<br />11.7 8.7 17.9
<br />
<br />0.2 0.4 9.6
<br />17.3 18.2 8.2
<br />74.4 17.8 23.3
<br />6.6 1.7 21.9
<br />1.5 2.0 37.0
<br />
<br />04 0.9 10.7
<br />16.8 18.4 3.3
<br />67.4 71.3 9.8
<br />10.5 3.9 29.5
<br />4.8 ~.5 46.7
<br />
<br />IBas.flow from up,tre..m source. on South PI..tt. ..nd Bear Crpk.
<br />'WilIstewater from L.ttlt-toniEnglewood. Lakewood ilInd Glend.le plant..
<br />.W..ste....ater from Central Denver Service are.. of Metro plant.
<br />'BilIseftow from groundwater and ,rl"lgat'on return flows.
<br />'Runoff generilted from wrth," study are.. bu,".
<br />
<br />Totill
<br />L...d
<br />(,)
<br />
<br />Tot.1
<br />linc
<br />(>l
<br />
<br />41.4
<br />17
<br />"
<br />34_3
<br />13.5
<br />
<br />..3
<br />4.5
<br />37.3
<br />31.0
<br />20.9
<br />
<br />80
<br />3.3
<br />32.5
<br />29.0
<br />27.2
<br />
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