DWQ-2024-001772

Utah Division of Water Quality
Salt Lake City, Utah
WASTELOAD ANALYSIS [WLA]19-Feb-24
Addendum: Statement of Basis
Facilities: Weir Minerals NA SLC - Rubber Engineering UPDES No:UT-0024767
Discharging to:Storm Drain -->Mill Creek--> Jordan River-4
Design Flow:0.12 MGD
I. Introduction
Wasteload analyses are performed to determine point source effluent limitations necessary to maintain designated
beneficial uses by evaluating projected effects of discharge concentrations on in-stream water quality. The
wasteload analysis also takes into account downstream designated uses [R317-2-8, UAC]. Projected concen-
trations are compared to numeric water quality standards to determine acceptability. The anti-degradation
policy and procedures are also considered. The primary in-stream parameters of concern may include metals
(as a function of hardness), total dissolved solids (TDS), total residual chlorine (TRC), un-ionized ammonia (as a
function of pH and temperature, measured and evaluated interms of total ammonia), and dissolved oxygen.
Mathematical water quality modeling is employed to determine stream quality response to point source discharges.
Models aid in the effort of anticipating stream quality at future effluent flows at critical environmental conditions
(e.g., low stream flow, high temperature, high pH, etc).
The numeric criteria in this wasteload analysis may always be modified by narrative criteria and other conditions
determined by staff of the Division of Water Quality.
II. Receiving Water and Stream Classification
Storm Drain -->Mill Creek--> Jordan River-4:2B, 3C, 4
Antidegradation Review:Level I review completed. Level II review not required.
III. Numeric Stream Standards for Protection of Aquatic Wildlife
Total Ammonia (TNH3)Varies as a function of Temperature and
pH Rebound. See Water Quality Standards
Chronic Total Residual Chlorine (TRC)0.011 mg/l (4 Day Average)
0.019 mg/l (1 Hour Average)
Chronic Dissolved Oxygen (DO) 5.50 mg/l (30 Day Average)
4.00 mg/l (7Day Average)
3.00 mg/l (1 Day Average
Maximum Total Dissolved Solids 1200.0 mg/l
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Utah Division of Water Quality
Salt Lake City, Utah
Acute and Chronic Heavy Metals (Dissolved)
4 Day Average (Chronic) Standard 1 Hour Average (Acute) Standard
Parameter Concentration Load*Concentration Load*
Aluminum 87.00 ug/l**0.087 lbs/day 750.00 ug/l 0.752 lbs/day
Arsenic 190.00 ug/l 0.190 lbs/day 340.00 ug/l 0.341 lbs/day
Cadmium 2.48 ug/l 0.002 lbs/day 6.96 ug/l 0.007 lbs/day
Chromium III 266.86 ug/l 0.268 lbs/day 5583.16 ug/l 5.597 lbs/day
ChromiumVI 11.00 ug/l 0.011 lbs/day 16.00 ug/l 0.016 lbs/day
Copper 30.34 ug/l 0.030 lbs/day 51.38 ug/l 0.052 lbs/day
Iron 1000.00 ug/l 1.003 lbs/day
Lead 18.43 ug/l 0.018 lbs/day 473.06 ug/l 0.474 lbs/day
Mercury 0.0120 ug/l 0.000 lbs/day 2.40 ug/l 0.002 lbs/day
Nickel 167.66 ug/l 0.168 lbs/day 1507.96 ug/l 1.512 lbs/day
Selenium 4.60 ug/l 0.005 lbs/day 20.00 ug/l 0.020 lbs/day
Silver N/A ug/l N/A lbs/day 40.63 ug/l 0.041 lbs/day
Zinc 385.79 ug/l 0.387 lbs/day 385.79 ug/l 0.387 lbs/day
* Allowed below discharge
**Chronic Aluminum standard applies only to waters with a pH < 7.0 and a Hardness < 50 mg/l as CaCO3
Metals Standards Based upon a Hardness of 397.52 mg/l as CaCO3
Organics [Pesticides]
4 Day Average (Chronic) Standard 1 Hour Average (Acute) Standard
Parameter Concentration Load*Concentration Load*
Aldrin 1.500 ug/l 0.002 lbs/day
Chlordane 0.004 ug/l 0.173 lbs/day 1.200 ug/l 0.001 lbs/day
DDT, DDE 0.001 ug/l 0.040 lbs/day 0.550 ug/l 0.001 lbs/day
Dieldrin 0.002 ug/l 0.077 lbs/day 1.250 ug/l 0.001 lbs/day
Endosulfan 0.056 ug/l 2.259 lbs/day 0.110 ug/l 0.000 lbs/day
Endrin 0.002 ug/l 0.093 lbs/day 0.090 ug/l 0.000 lbs/day
Guthion 0.010 ug/l 0.000 lbs/day
Heptachlor 0.004 ug/l 0.153 lbs/day 0.260 ug/l 0.000 lbs/day
Lindane 0.080 ug/l 3.228 lbs/day 1.000 ug/l 0.001 lbs/day
Methoxychlor 0.030 ug/l 0.000 lbs/day
Mirex 0.010 ug/l 0.000 lbs/day
Parathion 0.040 ug/l 0.000 lbs/day
PCB's 0.014 ug/l 0.565 lbs/day 2.000 ug/l 0.002 lbs/day
Pentachlorophenol 13.00 ug/l 524.519 lbs/day 20.000 ug/l 0.020 lbs/day
Toxephene 0.0002 ug/l 0.008 lbs/day 0.7300 ug/l 0.001 lbs/day
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Utah Division of Water Quality
Salt Lake City, Utah
IV. Numeric Stream Standards for Protection of Agriculture
4 Day Average (Chronic) Standard 1 Hour Average (Acute) Standard
Concentration Load*Concentration Load*
Arsenic 100.0 ug/l lbs/day
Boron 750.0 ug/l lbs/day
Cadmium 10.0 ug/l 0.01 lbs/day
Chromium 100.0 ug/l lbs/day
Copper 200.0 ug/l lbs/day
Lead 100.0 ug/l lbs/day
Selenium 50.0 ug/l lbs/day
TDS, Summer 1200.0 mg/l 0.60 tons/day
VI. Numeric Stream Standards the Protection of Human Health from Water & Fish Consumption [Toxics]
Maximum Conc., ug/l - Acute Standards
Class 1C Class 3A, 3B
Toxic Organics [2 Liters/Day for 70 Kg Person over 70 Yr.] [6.5 g for 70 Kg Person over 70 Yr.]
Acenaphthene ug/l lbs/day 2700.0 ug/l 108.94 lbs/day
Acrolein ug/l lbs/day 780.0 ug/l 31.47 lbs/day
Acrylonitrile ug/l lbs/day 0.7 ug/l 0.03 lbs/day
Benzene ug/l lbs/day 71.0 ug/l 2.86 lbs/day
Benzidine ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Carbon tetrachloride ug/l lbs/day 4.4 ug/l 0.18 lbs/day
Chlorobenzene ug/l lbs/day 21000.0 ug/l 847.30 lbs/day
1,2,4-Trichlorobenzene
Hexachlorobenzene ug/l lbs/day 0.0 ug/l 0.00 lbs/day
1,2-Dichloroethane ug/l lbs/day 99.0 ug/l 3.99 lbs/day
1,1,1-Trichloroethane
Hexachloroethane ug/l lbs/day 8.9 ug/l 0.36 lbs/day
1,1-Dichloroethane
1,1,2-Trichloroethane ug/l lbs/day 42.0 ug/l 1.69 lbs/day
1,1,2,2-Tetrachloroethane ug/l lbs/day 11.0 ug/l 0.44 lbs/day
Chloroethane 0.0 ug/l 0.00 lbs/day
Bis(2-chloroethyl) ether ug/l lbs/day 1.4 ug/l 0.06 lbs/day
2-Chloroethyl vinyl ether ug/l lbs/day 0.0 ug/l 0.00 lbs/day
2-Chloronaphthalene ug/l lbs/day 4300.0 ug/l 173.49 lbs/day
2,4,6-Trichlorophenol ug/l lbs/day 6.5 ug/l 0.26 lbs/day
p-Chloro-m-cresol 0.0 ug/l 0.00 lbs/day
Chloroform (HM)ug/l lbs/day 470.0 ug/l 18.96 lbs/day
2-Chlorophenol ug/l lbs/day 400.0 ug/l 16.14 lbs/day
1,2-Dichlorobenzene ug/l lbs/day 17000.0 ug/l 685.91 lbs/day
1,3-Dichlorobenzene ug/l lbs/day 2600.0 ug/l 104.90 lbs/day
1,4-Dichlorobenzene ug/l lbs/day 2600.0 ug/l 104.90 lbs/day
3,3'-Dichlorobenzidine ug/l lbs/day 0.1 ug/l 0.00 lbs/day
1,1-Dichloroethylene ug/l lbs/day 3.2 ug/l 0.13 lbs/day
1,2-trans-Dichloroethylene1 ug/l lbs/day 0.0 ug/l 0.00 lbs/day
2,4-Dichlorophenol ug/l lbs/day 790.0 ug/l 31.87 lbs/day
1,2-Dichloropropane ug/l lbs/day 39.0 ug/l 1.57 lbs/day
1,3-Dichloropropylene ug/l lbs/day 1700.0 ug/l 68.59 lbs/day
2,4-Dimethylphenol ug/l lbs/day 2300.0 ug/l 92.80 lbs/day
2,4-Dinitrotoluene ug/l lbs/day 9.1 ug/l 0.37 lbs/day
2,6-Dinitrotoluene ug/l lbs/day 0.0 ug/l 0.00 lbs/day
1,2-Diphenylhydrazine ug/l lbs/day 0.5 ug/l 0.02 lbs/day
Ethylbenzene ug/l lbs/day 29000.0 ug/l 1170.08 lbs/day
Fluoranthene ug/l lbs/day 370.0 ug/l 14.93 lbs/day
4-Chlorophenyl phenyl ether
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Utah Division of Water Quality
Salt Lake City, Utah
4-Bromophenyl phenyl ether
Bis(2-chloroisopropyl) ether ug/l lbs/day 170000.0 ug/l 6859.09 lbs/day
Bis(2-chloroethoxy) methane ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Methylene chloride (HM)ug/l lbs/day 1600.0 ug/l 64.56 lbs/day
Methyl chloride (HM)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Methyl bromide (HM)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Bromoform (HM)ug/l lbs/day 360.0 ug/l 14.53 lbs/day
Dichlorobromomethane(HM)ug/l lbs/day 22.0 ug/l 0.89 lbs/day
Chlorodibromomethane (HM)ug/l lbs/day 34.0 ug/l 1.37 lbs/day
Hexachlorobutadiene(c)ug/l lbs/day 50.0 ug/l 2.02 lbs/day
Hexachlorocyclopentadiene ug/l lbs/day 17000.0 ug/l 685.91 lbs/day
Isophorone ug/l lbs/day 600.0 ug/l 24.21 lbs/day
Naphthalene
Nitrobenzene ug/l lbs/day 1900.0 ug/l 76.66 lbs/day
2-Nitrophenol ug/l lbs/day 0.0 ug/l 0.00 lbs/day
4-Nitrophenol ug/l lbs/day 0.0 ug/l 0.00 lbs/day
2,4-Dinitrophenol ug/l lbs/day 14000.0 ug/l 564.87 lbs/day
4,6-Dinitro-o-cresol ug/l lbs/day 765.0 ug/l 30.87 lbs/day
N-Nitrosodimethylamine ug/l lbs/day 8.1 ug/l 0.33 lbs/day
N-Nitrosodiphenylamine ug/l lbs/day 16.0 ug/l 0.65 lbs/day
N-Nitrosodi-n-propylamine ug/l lbs/day 1.4 ug/l 0.06 lbs/day
Pentachlorophenol ug/l lbs/day 8.2 ug/l 0.33 lbs/day
Phenol ug/l lbs/day 4.6E+06 ug/l 1.86E+05 lbs/day
Bis(2-ethylhexyl)phthalate ug/l lbs/day 5.9 ug/l 0.24 lbs/day
Butyl benzyl phthalate ug/l lbs/day 5200.0 ug/l 209.81 lbs/day
Di-n-butyl phthalate ug/l lbs/day 12000.0 ug/l 484.17 lbs/day
Di-n-octyl phthlate
Diethyl phthalate ug/l lbs/day 120000.0 ug/l 4841.71 lbs/day
Dimethyl phthlate ug/l lbs/day 2.9E+06 ug/l 1.17E+05 lbs/day
Benzo(a)anthracene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Benzo(a)pyrene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Benzo(b)fluoranthene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Benzo(k)fluoranthene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Chrysene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Acenaphthylene (PAH)
Anthracene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Dibenzo(a,h)anthracene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Indeno(1,2,3-cd)pyrene (PAH)ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Pyrene (PAH)ug/l lbs/day 11000.0 ug/l 443.82 lbs/day
Tetrachloroethylene ug/l lbs/day 8.9 ug/l 0.36 lbs/day
Toluene ug/l lbs/day 200000 ug/l 8069.52 lbs/day
Trichloroethylene ug/l lbs/day 81.0 ug/l 3.27 lbs/day
Vinyl chloride ug/l lbs/day 525.0 ug/l 21.18 lbs/day
lbs/day
Pesticides lbs/day
Aldrin ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Dieldrin ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Chlordane ug/l lbs/day 0.0 ug/l 0.00 lbs/day
4,4'-DDT ug/l lbs/day 0.0 ug/l 0.00 lbs/day
4,4'-DDE ug/l lbs/day 0.0 ug/l 0.00 lbs/day
4,4'-DDD ug/l lbs/day 0.0 ug/l 0.00 lbs/day
alpha-Endosulfan ug/l lbs/day 2.0 ug/l 0.08 lbs/day
beta-Endosulfan ug/l lbs/day 2.0 ug/l 0.08 lbs/day
Endosulfan sulfate ug/l lbs/day 2.0 ug/l 0.08 lbs/day
Endrin ug/l lbs/day 0.8 ug/l 0.03 lbs/day
Endrin aldehyde ug/l lbs/day 0.8 ug/l 0.03 lbs/day
Heptachlor ug/l lbs/day 0.0 ug/l 0.00 lbs/day
Heptachlor epoxide
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Utah Division of Water Quality
Salt Lake City, Utah
Metals
Antimony ug/l lbs/day
Arsenic ug/l lbs/day 4300.00 ug/l 173.49 lbs/day
Asbestos ug/l lbs/day
Beryllium
Cadmium
Chromium (III)
Chromium (VI)
Copper
Cyanide ug/l lbs/day 2.2E+05 ug/l 8876.47 lbs/day
Lead ug/l lbs/day
Mercury 0.15 ug/l 0.0061 lbs/day
Nickel 4600.00 ug/l 185.60 lbs/day
Selenium ug/l lbs/day
Silver ug/l lbs/day
Thallium 6.30 ug/l 0.25 lbs/day
Zinc
There are additional standards that apply to this receiving water, but were not
considered in this modeling/waste load allocation analysis.
VII. Mathematical Modeling of Stream Quality
Model configuration was accomplished utilizing standard modeling procedures. Data points were
plotted and coefficients adjusted as required to match observed data as closely as possible.
The modeling approach used in this analysis included one or a combination of the following
models.
(1) The Utah River Model, Utah Division of Water Quality, 1992. Based upon STREAMDO IV
(Region VIII) and Supplemental Ammonia Toxicity Models; EPA Region VIII, Sept. 1990 and
QUAL2E (EPA, Athens, GA).
(2) Utah Ammonia/Chlorine Model, Utah Division of Water Quality, 1992.
(3) AMMTOX Model, University of Colorado, Center of Limnology, and EPA Region 8
(4) Principles of Surface Water Quality Modeling and Control. Robert V. Thomann, et.al.
Harper Collins Publisher, Inc. 1987, pp. 644.
Coefficients used in the model were based, in part, upon the following references:
(1) Rates, Constants, and Kinetics Formulations in Surface Water Quality Modeling. Environmen-
tal Research Laboratory, Office of Research and Development, U.S. Environmental Protection
Agency, Athens Georgia. EPA/600/3-85/040 June 1985.
(2) Principles of Surface Water Quality Modeling and Control. Robert V. Thomann, et.al.
Harper Collins Publisher, Inc. 1987, pp. 644.
VIII. Modeling Information
The required information for the model may include the following information for both the
upstream conditions at low flow and the effluent conditions:

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Utah Division of Water Quality
Salt Lake City, Utah
Flow, Q, (cfs or MGD)D.O. mg/l
Temperature, Deg. C.Total Residual Chlorine (TRC), mg/l
pH Total NH3-N, mg/l
BOD5, mg/l Total Dissolved Solids (TDS), mg/l
Metals, ug/l Toxic Organics of Concern, ug/l
Other Conditions
In addition to the upstream and effluent conditions, the models require a variety of physical and
biological coefficients and other technical information. In the process of actually establishing the
permit limits for an effluent, values are used based upon the available data, model calibration,
literature values, site visits and best professional judgement.
Model Inputs
The following is upstream and discharge information that was utilized as inputs for the analysis.
Dry washes are considered to have an upstream flow equal to the flow of the discharge.
Current Upstream Information
Stream
Critical Low
Flow Temp.pH T-NH3 BOD5 DO TRC TDS
cfs Deg. C mg/l as N mg/l mg/l mg/l mg/l
Summer (Irrig. Season)7.30 19.7 7.9 0.03 1.50 7.02 0.00 1050.7
Fall 7.50 9.1 7.6 0.03 1.50 --- 0.00 667.3
Winter 6.20 7.8 7.6 0.03 1.50 --- 0.00 736.0
Spring 14.40 14.2 7.7 0.03 1.50 --- 0.00 698.0
Dissolved Al As Cd CrIII CrVI Copper Fe Pb
Metals ug/l ug/l ug/l ug/l ug/l ug/l ug/l ug/l
All Seasons 5.00 7.00 0.10 2.24 1.10 1.50 18.5 0.10
Dissolved Hg Ni Se Ag Zn Boron
Metals ug/l ug/l ug/l ug/l ug/l ug/l
All Seasons 0.0000 2.50 0.50 0.30 5.00 206.0 * ~80% MDL
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Utah Division of Water Quality
Salt Lake City, Utah
Projected Discharge Information

Season Flow, MGD Temp.
Summer 0.12000 17.1
Fall 0.12000 15.4
Winter 0.12000 11.9
Spring 0.12000 12.9
All model numerical inputs, intermediate calculations, outputs and graphs are available for
discussion, inspection and copy at the Division of Water Quality.
IX. Effluent Limitations
Current State water quality standards are required to be met under a variety of conditions including
in-stream flows targeted to the 7-day, 10-year low flow (R317-2-9).
Other conditions used in the modeling effort coincide with the environmental conditions expected
at low stream flows.
Effluent Limitation for Flow based upon Water Quality Standards
In-stream criteria of downstream segments will be met with an effluent flow maximum value as follows:
Season Daily Average
Summer 0.120 MGD 0.186 cfs
Fall 0.120 MGD 0.186 cfs
Winter 0.120 MGD 0.186 cfs
Spring 0.120 MGD 0.186 cfs
Flow Requirement or Loading Requirement
The calculations in this wasteload analysis utilize the maximum effluent discharge flow of 0.12 MGD. If the
discharger is allowed to have a flow greater than 0.12 MGD during 7Q10 conditions, and effluent limit
concentrations as indicated, then water quality standards will be violated. In order to prevent this from occuring,
the permit writers must include the discharge flow limititation as indicated above; or, include loading effluent
limits in the permit.
Effluent Limitation for Whole Effluent Toxicity (WET) based upon WET Policy
Effluent Toxicity will not occur in downstream segements if the values below are met.
WET Requirements LC50 >100.0%Effluent [Acute]
IC25 >2.5%Effluent [Chronic]
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Utah Division of Water Quality
Salt Lake City, Utah
Effluent Limitation for Biological Oxygen Demand (BOD) based upon Water Quality
Standards or Regulations
In-stream criteria of downstream segments for Dissolved Oxygen will be met with an effluent BOD
limitation as follows:
Season Concentration
Summer 25.0 mg/l as BOD5 25.0 lbs/day
Fall 25.0 mg/l as BOD5 25.0 lbs/day
Winter 25.0 mg/l as BOD5 25.0 lbs/day
Spring 25.0 mg/l as BOD5 25.0 lbs/day
Effluent Limitation for Dissolved Oxygen (DO) based upon Water Quality Standards
In-stream criteria of downstream segments for Dissolved Oxygen will be met with an effluent
D.O. limitation as follows:
Season Concentration
Summer 4.50
Fall 4.50
Winter 4.50
Spring 4.50
Effluent Limitation for Total Ammonia based upon Water Quality Standards
In-stream criteria of downstream segments for Total Ammonia will be met with an effluent
limitation (expressed as Total Ammonia as N) as follows:
Season
Concentration Load
Summer 4 Day Avg. - Chronic 84.83 mg/l as N 84.9 lbs/day
1 Hour Avg. - Acute 155.2 mg/l as N 155.3 lbs/day
Fall 4 Day Avg. - Chronic 271.6 mg/l as N 271.8 lbs/day
1 Hour Avg. - Acute 370.3 mg/l as N 370.5 lbs/day
Winter 4 Day Avg. - Chronic 136.7 mg/l as N 136.8 lbs/day
1 Hour Avg. - Acute 203.6 mg/l as N 203.8 lbs/day
Spring 4 Day Avg. - Chronic 166.2 mg/l as N 166.3 lbs/day
1 Hour Avg. - Acute 249.6 mg/l as N 249.7 lbs/day
Acute limit calculated with an Acute Zone of Initial Dilution (ZID) to be equal to 50.%.
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Utah Division of Water Quality
Salt Lake City, Utah
Effluent Limitation for Total Residual Chlorine based upon Water Quality Standards
In-stream criteria of downstream segments for Total Residual Chlorine will be met with an effluent
limitation as follows:
Season Concentration Load
Summer 4 Day Avg. - Chronic 0.403 mg/l 0.40 lbs/day
1 Hour Avg. - Acute 0.372 mg/l 0.37 lbs/day
Fall 4 Day Avg. - Chronic 0.414 mg/l 0.41 lbs/day
1 Hour Avg. - Acute 0.382 mg/l 0.38 lbs/day
Winter 4 Day Avg. - Chronic 0.344 mg/l 0.34 lbs/day
1 Hour Avg. - Acute 0.319 mg/l 0.32 lbs/day
Spring 4 Day Avg. - Chronic 0.785 mg/l 0.79 lbs/day
1 Hour Avg. - Acute 0.716 mg/l 0.72 lbs/day
Effluent Limitations for Total Dissolved Solids based upon Water Quality Standards
Season Concentration Load
Summer Maximum, Acute 7072.3 mg/l 3.54 tons/day
Fall Maximum, Acute 22146.3 mg/l 11.08 tons/day
Winter Maximum, Acute 19446.1 mg/l 9.73 tons/day
Spring Maximum, Acute 20940.4 mg/l 10.48 tons/day
Colorado Salinity Forum Limits Determined by Permitting Section
Effluent Limitations for Total Recoverable Metals based upon
Water Quality Standards
In-stream criteria of downstream segments for Dissolved Metals will be met with an effluent
limitation as follows (based upon a hardness of 397.52 mg/l):
4 Day Average 1 Hour Average
Concentration Load Concentration Load
Aluminum*N/A N/A 15,398.0 ug/l 15.4371 lbs/day
Arsenic*7,386.19 ug/l 4.8 lbs/day 6,887.3 ug/l 6.9048 lbs/day
Cadmium 96.09 ug/l 0.1 lbs/day 141.8 ug/l 0.1421 lbs/day
Chromium III 10,672.50 ug/l 6.9 lbs/day 115,313.6 ug/l 115.6065 lbs/day
Chromium VI*400.30 ug/l 0.3 lbs/day 309.0 ug/l 0.3097 lbs/day
Copper 1,164.33 ug/l 0.8 lbs/day 1,032.2 ug/l 1.0348 lbs/day
Iron*N/A N/A 20,298.0 ug/l 20.3495 lbs/day
Lead 739.40 ug/l 0.5 lbs/day 9,772.2 ug/l 9.7970 lbs/day
Mercury*0.48 ug/l 0.0 lbs/day 49.6 ug/l 0.0497 lbs/day
Nickel 6,662.15 ug/l 4.3 lbs/day 31,107.9 ug/l 31.1869 lbs/day
Selenium*165.83 ug/l 0.1 lbs/day 403.4 ug/l 0.4044 lbs/day
Silver N/A ug/l N/A lbs/day 833.7 ug/l 0.8358 lbs/day
Zinc 15,359.77 ug/l 9.9 lbs/day 7,872.8 ug/l 7.8928 lbs/day
Cyanide*209.68 ug/l 0.1 lbs/day 454.6 ug/l 0.4557 lbs/day
*Limits for these metals are based on the dissolved standard.
Effluent Limitations for Heat/Temperature based upon
Water Quality Standards
Page 9
Utah Division of Water Quality
Salt Lake City, Utah
Summer 181.0 Deg. C.357.9 Deg. F
Fall 174.7 Deg. C.346.4 Deg. F
Winter 145.4 Deg. C.293.8 Deg. F
Spring 328.5 Deg. C.623.3 Deg. F
Effluent Limitations for Organics [Pesticides]
Based upon Water Quality Standards
In-stream criteria of downstream segments for Organics [Pesticides]
will be met with an effluent limit as follows:
4 Day Average 1 Hour Average
Concentration Load Concentration Load
Aldrin 1.5E+00 ug/l 2.33E-03 lbs/day
Chlordane 4.30E-03 ug/l 4.30E-03 lbs/day 1.2E+00 ug/l 1.86E-03 lbs/day
DDT, DDE 1.00E-03 ug/l 1.00E-03 lbs/day 5.5E-01 ug/l 8.53E-04 lbs/day
Dieldrin 1.90E-03 ug/l 1.90E-03 lbs/day 1.3E+00 ug/l 1.94E-03 lbs/day
Endosulfan 5.60E-02 ug/l 5.60E-02 lbs/day 1.1E-01 ug/l 1.71E-04 lbs/day
Endrin 2.30E-03 ug/l 2.30E-03 lbs/day 9.0E-02 ug/l 1.40E-04 lbs/day
Guthion 0.00E+00 ug/l 0.00E+00 lbs/day 1.0E-02 ug/l 1.55E-05 lbs/day
Heptachlor 3.80E-03 ug/l 3.80E-03 lbs/day 2.6E-01 ug/l 4.03E-04 lbs/day
Lindane 8.00E-02 ug/l 8.00E-02 lbs/day 1.0E+00 ug/l 1.55E-03 lbs/day
Methoxychlor 0.00E+00 ug/l 0.00E+00 lbs/day 3.0E-02 ug/l 4.65E-05 lbs/day
Mirex 0.00E+00 ug/l 0.00E+00 lbs/day 1.0E-02 ug/l 1.55E-05 lbs/day
Parathion 0.00E+00 ug/l 0.00E+00 lbs/day 4.0E-02 ug/l 6.20E-05 lbs/day
PCB's 1.40E-02 ug/l 1.40E-02 lbs/day 2.0E+00 ug/l 3.10E-03 lbs/day
Pentachlorophenol 1.30E+01 ug/l 1.30E+01 lbs/day 2.0E+01 ug/l 3.10E-02 lbs/day
Toxephene 2.00E-04 ug/l 2.00E-04 lbs/day 7.3E-01 ug/l 1.13E-03 lbs/day
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Utah Division of Water Quality
Salt Lake City, Utah
Effluent Limitations for Protection of Human Health [Toxics Rule]
Based upon Water Quality Standards (Most stringent of 1C or 3A & 3B as appropriate.)
In-stream criteria of downstream segments for Protection of Human Health [Toxics]
will be met with an effluent limit as follows:
Maximum Concentration
Concentration Load
Toxic Organics
Acenaphthene 1.09E+05 ug/l 1.09E+02 lbs/day
Acrolein 3.15E+04 ug/l 3.15E+01 lbs/day
Acrylonitrile 2.66E+01 ug/l 2.66E-02 lbs/day
Benzene 2.86E+03 ug/l 2.86E+00 lbs/day
Benzidine ug/l lbs/day
Carbon tetrachloride 1.77E+02 ug/l 1.78E-01 lbs/day
Chlorobenzene 8.47E+05 ug/l 8.47E+02 lbs/day
1,2,4-Trichlorobenzene
Hexachlorobenzene 3.10E-02 ug/l 3.11E-05 lbs/day
1,2-Dichloroethane 3.99E+03 ug/l 3.99E+00 lbs/day
1,1,1-Trichloroethane
Hexachloroethane 3.59E+02 ug/l 3.59E-01 lbs/day
1,1-Dichloroethane
1,1,2-Trichloroethane 1.69E+03 ug/l 1.69E+00 lbs/day
1,1,2,2-Tetrachloroethane 4.44E+02 ug/l 4.44E-01 lbs/day
Chloroethane
Bis(2-chloroethyl) ether 5.65E+01 ug/l 5.65E-02 lbs/day
2-Chloroethyl vinyl ether
2-Chloronaphthalene 1.73E+05 ug/l 1.73E+02 lbs/day
2,4,6-Trichlorophenol 2.62E+02 ug/l 2.62E-01 lbs/day
p-Chloro-m-cresol
Chloroform (HM)1.90E+04 ug/l 1.90E+01 lbs/day
2-Chlorophenol 1.61E+04 ug/l 1.61E+01 lbs/day
1,2-Dichlorobenzene 6.85E+05 ug/l 6.86E+02 lbs/day
1,3-Dichlorobenzene 1.05E+05 ug/l 1.05E+02 lbs/day
1,4-Dichlorobenzene 1.05E+05 ug/l 1.05E+02 lbs/day
3,3'-Dichlorobenzidine 3.10E+00 ug/l 3.11E-03 lbs/day
1,1-Dichloroethylene 1.29E+02 ug/l 1.29E-01 lbs/day
1,2-trans-Dichloroethylene1
2,4-Dichlorophenol 3.19E+04 ug/l 3.19E+01 lbs/day
1,2-Dichloropropane 1.57E+03 ug/l 1.57E+00 lbs/day
1,3-Dichloropropylene 6.85E+04 ug/l 6.86E+01 lbs/day
2,4-Dimethylphenol 9.27E+04 ug/l 9.28E+01 lbs/day
2,4-Dinitrotoluene 3.67E+02 ug/l 3.67E-01 lbs/day
2,6-Dinitrotoluene
1,2-Diphenylhydrazine 2.18E+01 ug/l 2.18E-02 lbs/day
Ethylbenzene 1.17E+06 ug/l 1.17E+03 lbs/day
Fluoranthene 1.49E+04 ug/l 1.49E+01 lbs/day
4-Chlorophenyl phenyl ether
4-Bromophenyl phenyl ether
Bis(2-chloroisopropyl) ether 6.85E+06 ug/l 6.86E+03 lbs/day
Bis(2-chloroethoxy) methane
Methylene chloride (HM)6.45E+04 ug/l 6.46E+01 lbs/day
Methyl chloride (HM)
Methyl bromide (HM)
Bromoform (HM)1.45E+04 ug/l 1.45E+01 lbs/day
Dichlorobromomethane(HM)8.87E+02 ug/l 8.88E-01 lbs/day
Chlorodibromomethane (HM)1.37E+03 ug/l 1.37E+00 lbs/day
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Utah Division of Water Quality
Salt Lake City, Utah
Hexachlorocyclopentadiene 6.85E+05 ug/l 6.86E+02 lbs/day
Isophorone 2.42E+04 ug/l 2.42E+01 lbs/day
Naphthalene
Nitrobenzene 7.66E+04 ug/l 7.67E+01 lbs/day
2-Nitrophenol
4-Nitrophenol
2,4-Dinitrophenol 5.65E+05 ug/l 5.65E+02 lbs/day
4,6-Dinitro-o-cresol 3.08E+04 ug/l 3.09E+01 lbs/day
N-Nitrosodimethylamine 3.27E+02 ug/l 3.27E-01 lbs/day
N-Nitrosodiphenylamine 6.45E+02 ug/l 6.46E-01 lbs/day
N-Nitrosodi-n-propylamine 5.65E+01 ug/l 5.65E-02 lbs/day
Pentachlorophenol 3.31E+02 ug/l 3.31E-01 lbs/day
Phenol 1.85E+08 ug/l 1.86E+05 lbs/day
Bis(2-ethylhexyl)phthalate 2.38E+02 ug/l 2.38E-01 lbs/day
Butyl benzyl phthalate 2.10E+05 ug/l 2.10E+02 lbs/day
Di-n-butyl phthalate 4.84E+05 ug/l 4.84E+02 lbs/day
Di-n-octyl phthlate
Diethyl phthalate 4.84E+06 ug/l 4.84E+03 lbs/day
Dimethyl phthlate 1.17E+08 ug/l 1.17E+05 lbs/day
Benzo(a)anthracene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Benzo(a)pyrene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Benzo(b)fluoranthene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Benzo(k)fluoranthene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Chrysene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Acenaphthylene (PAH)
Anthracene (PAH)
Dibenzo(a,h)anthracene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Indeno(1,2,3-cd)pyrene (PAH)1.25E+00 ug/l 1.25E-03 lbs/day
Pyrene (PAH)4.44E+05 ug/l 4.44E+02 lbs/day
Tetrachloroethylene 3.59E+02 ug/l 3.59E-01 lbs/day
Toluene 8.06E+06 ug/l 8.07E+03 lbs/day
Trichloroethylene 3.27E+03 ug/l 3.27E+00 lbs/day
Vinyl chloride 2.12E+04 ug/l 2.12E+01 lbs/day
Pesticides
Aldrin 5.65E-03 ug/l 5.65E-06 lbs/day
Dieldrin 5.65E-03 ug/l 5.65E-06 lbs/day
Chlordane 2.38E-02 ug/l 2.38E-05 lbs/day
4,4'-DDT 2.38E-02 ug/l 2.38E-05 lbs/day
4,4'-DDE 2.38E-02 ug/l 2.38E-05 lbs/day
4,4'-DDD 3.39E-02 ug/l 3.39E-05 lbs/day
alpha-Endosulfan 8.06E+01 ug/l 8.07E-02 lbs/day
beta-Endosulfan 8.06E+01 ug/l 8.07E-02 lbs/day
Endosulfan sulfate 8.06E+01 ug/l 8.07E-02 lbs/day
Endrin 3.27E+01 ug/l 3.27E-02 lbs/day
Endrin aldehyde 3.27E+01 ug/l 3.27E-02 lbs/day
Heptachlor 8.47E-03 ug/l 8.47E-06 lbs/day
Heptachlor epoxide
PCB's
PCB 1242 (Arochlor 1242)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1254 (Arochlor 1254)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1221 (Arochlor 1221)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1232 (Arochlor 1232)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1248 (Arochlor 1248)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1260 (Arochlor 1260)1.81E-03 ug/l 1.82E-06 lbs/day
PCB-1016 (Arochlor 1016)1.81E-03 ug/l 1.82E-06 lbs/day
Pesticide
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Utah Division of Water Quality
Salt Lake City, Utah
Toxaphene 3.02E-02 ug/l 3.03E-05 lbs/day
Metals
Antimony ug/l lbs/day
Arsenic ug/l lbs/day
Asbestos ug/l lbs/day
Beryllium
Cadmium
Chromium (III)
Chromium (VI)
Copper ug/l lbs/day
Cyanide ug/l lbs/day
Lead
Mercury ug/l lbs/day
Nickel ug/l lbs/day
Selenium
Silver
Thallium ug/l lbs/day
Zinc
Dioxin
Dioxin (2,3,7,8-TCDD)5.65E-07 ug/l 5.65E-10 lbs/day
Metals Effluent Limitations for Protection of All Beneficial Uses
Based upon Water Quality Standards and Toxics Rule
Class 4
Acute
Agricultural
Class 3
Acute
Aquatic
Wildlife
Acute
Toxics
Drinking
Water
Source
Acute
Toxics
Wildlife
1C Acute
Health
Criteria
Acute
Most
Stringent
Class 3
Chronic
Aquatic
Wildlife
ug/l ug/l ug/l ug/l ug/l ug/l ug/l
Aluminum 15398.0 15398.0 N/A
Antimony 173390.7 173390.7
Arsenic 4032.3 6887.3 4032.3 7386.2
Barium
Beryllium 0.0
Cadmium 399.3 141.8 141.8 96.1
Chromium (III)115313.6 115313.6 10672.5
Chromium (VI)3944.3 309.0 308.96 400.30
Copper 8005.7 1032.2 1032.2 1164.3
Cyanide 454.6 8871152.8 454.6 209.7
Iron 20298.0 20298.0
Lead 4028.4 9772.2 4028.4 739.4
Mercury 49.59 6.05 6.05 0.483
Nickel 31107.9 185487.7 31107.9 6662.2
Selenium 1996.5 403.4 403.4 165.8
Silver 833.7 833.7
Thallium 254.0 254.0
Zinc 7872.8 7872.8 15359.8
Boron 22141.9 22141.9
Sulfate 74630.4 74630.4
Summary Effluent Limitations for Metals [Wasteload Allocation, TMDL]
[If Acute is more stringent than Chronic, then the Chronic takes on the Acute value.]
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Utah Division of Water Quality
Salt Lake City, Utah
WLA Acute WLA Chronic
ug/l ug/l
Aluminum 15398.0 N/A
Antimony 173390.71
Arsenic 4032.3 7386.2 Acute Controls
Asbestos
Barium
Beryllium
Cadmium 141.8 96.1
Chromium (III)115313.6 10672
Chromium (VI)309.0 400.3 Acute Controls
Copper 1032.2 1164.3 Acute Controls
Cyanide 454.6 209.7
Iron 20298.0
Lead 4028.4 739.4
Mercury 6.049 0.483
Nickel 31107.9 6662
Selenium 403.4 165.8
Silver 833.7 N/A
Thallium 254.0
Zinc 7872.8 15359.8 Acute Controls
Boron 22141.94
Sulfate 74630.4 N/A at this Waterbody
Other Effluent Limitations are based upon R317-1.
E. coli 126.0 organisms per 100 ml
X. Antidegradation Considerations
The Utah Antidegradation Policy allows for degradation of existing quality where it is determined
that such lowering of water quality is necessary to accommodate important economic or social
development in the area in which the waters are protected [R317-2-3]. It has been determined that
certain chemical parameters introduced by this discharge will cause an increase of the concentration of
said parameters in the receiving waters. Under no conditions will the increase in concentration be
allowed to interfere with existing instream water uses.
An Antidegradation Level I Review was conducted on this discharge and its effect on the
receiving water. Based upon that review, it has been determined that an
Antidegradation Level II Review is not required. The proposed permit is a simple renewal, with no
increase in flow or concentration over that which was approved in the existing permit.
XI. Colorado River Salinity Forum Considerations
Discharges in the Colorado River Basin are required to have their discharge at a TDS loading
of less than 1.00 tons/day unless certain exemptions apply. Refer to the Forum's Guidelines
for additional information allowing for an exceedence of this value.
This doesn’t apply to facilities that do not discharge to the Colorado River Basin.
XII. Summary Comments
The mathematical modeling and best professional judgement indicate that violations of receiving
water beneficial uses with their associated water quality standards, including important down-
stream segments, will not occur for the evaluated parameters of concern as discussed above if the
effluent limitations indicated above are met.
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