Preliminary Analysis of Immediate Effects of
Gold King Mine Release on Water Quality in the
San Juan River, Utah
Summary
In this report, the Department of Environmental Quality (DEQ) summarizes its analysis of the immediate,
short-term, effects of the Gold King Mine release on Water Quality in the San Juan River, Utah. This
interpretation may change as additional data and information continue to be collected and interpreted.
DEQ scientists believe that the highest levels of contaminants associated with the initial spill event
have passed through the San Juan River in Utah. DEQ makes this statement based on several
considerations:
At all monitoring locations, the dissolved concentrations of key dissolved metals have peaked
and subsequently declined to concentrations reflective of historic data and that are below
established environmental screening levels.
Total metals concentrations are highly variable and difficult to interpret with respect to this
event.
The monsoon storm events that occurred over the last couple of weeks are characteristic, but
complicate interpretation of monitoring results, especially with respect to total metals.
It is not currently possible to address all possible future states because the long-term effects of
observed peaks remain unknown.
Over the long-term, any metals from the event that arrive in Utah will ultimately be deposited in
Lake Powell. DEQ discusses its consideration of these long-term effects later in this analysis.
Introduction
DEQ scientists have reviewed water quality data collected by agency monitoring staff from August 8 to
August 17, 2015 to evaluate whether patterns in the data can help answer three key questions that have
been posed by the public, media, stakeholders, and communities impacted by and responding to the
Gold King Mine release in Utah:
1. Have the highest contaminant concentrations of the plume passed through the San Juan River in
Utah?
2. Has the San Juan River returned to concentrations similar to historic conditions?
3. Does the San Juan River pose a risk to those who rely on the river for agricultural uses,
recreational uses, and drinking water?
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DEQ's analysis includes examination of data collected by DEQ monitoring staff following the spill at four
sites along the San Juan River (Figure 1), twice daily from Saturday, August 8 to Tuesday, August 11,
2015, and then once daily through Monday, August 17, 2015. DEQ has also reviewed data collected by
the New Mexico Environment Department and the U.S. Environmental Protection Agency (EPA) on the
San Juan River upstream of Utah and also compiled and evaluated historic data collected by DEQ and
the U. S. Geological Survey (USGS) beginning in the late 1970's to place recent results in context with
respect to the range of conditions observed historically. The results of these analyses are summarized in
this document.
Metal concentrations in any river, especially a desert river system, are highly variable. These
concentrations naturally vary through time due to weather events and soil erosion within contributing
watersheds. Naturally-occurring metal concentrations also vary from place-to-place due to:
Changes in local lithology (the intrinsic characteristics of the rock and soils);
Weather events, especially important because summertime thunderstorms create concentrated
events that may differ greatly over relatively small areas; and
Hydrology (the delivery of metals from place-to-place in water).
Variation associated with any of these background conditions would complicate the analysis of a metal
release anywhere; the conditions of the San Juan watershed represent extremes with respect to all of
these sources of variability.
Given these considerations, DEQ scientists initiated analysis of the Gold King Mine release by evaluating
which metals would be expected to occur at detectable concentrations downstream of the spill in the
San Juan River in Utah, recognizing that much of the material from the event would likely be deposited
in the river bottoms of the Animas River and the San Juan River in New Mexico.
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I hh^hmoh
San Juan DWQ Sampling Sites Mm
Figure I. DEQ monitoring locations on the San Juan River.
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Estimated Plume Arrival in Utah
The interpretation of ongoing monitoring results of metal concentrations required estimates of when
the plume would be expected to reach DEQ monitoring locations along the San Juan River in Utah. DEQ
scientists predicted the date and time of the leading edge of the plume (Table 1) by comparing the
discharge measured at four USGS gages against field measurements of river velocity. The discharge-
velocity relationships allowed DEQ scientists to estimate the most likely time that the plume reached
monitoring stations on the San Juan River.
The leading edge of the plume was first established from field observations of the time when orange-
colored water first reached the San Juan River. The predicted plume was then subsequently tracked
downstream from location to location using time-specific measures of discharge from the closest
upstream gage. Periods of relatively stable discharge were averaged to obtain an expected velocity of a
stream segment, and then readjusted as necessary to account for changes in hydrology associated with
inputs from storms or other upstream diversions. The ultimate goal was to follow the leading edge of
the Gold King Plume from the confluence of the San Juan and Animas rivers downstream to the
monitoring locations established by DEQ and others.
Table 1. Estimated plume arrival times for Utah Monitoring Sites
Location
Sample Location
Earliest Estimated
Latest Estimated
Arrival
Arrival
Near Border
San Juan R @ US 160 Xing
8/9/15 @ 8:30 PM
8/10/15@ 8:30 AM
in CO
~30 miles from
San Juan R @ Town of
8/10/15 @ 9:30 AM
8/10/15 @ 9:30 PM
border
Montezuma
~25 miles from
San Juan R @ Sand Island
8/10/15 @ 7:00 PM
8/11/15 @ 7:00 AM
Montezuma
~30 miles from
San Juan R @ Mexican Hat
8/11/15 @ 5:00 AM
8/11/15 @ 5:00 PM
San Island
US 163 Xing
~75 miles from
Lake Powell, San Juan Delta
8/12/15 @ 5:00 AM
8/12/15 @ 5:00 PM
Mexican Hat
~160 river
miles from the
border
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Estimated Time of Arrival for Gold King Mine Spill
Monticello
iSih/erton,
8/5/2015
Blanding
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|Durango''
&7/2015
Farming-ton
a<'8.<'15'@ 9:00 AM
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Tuba City
Scuce: US National Far* Service, Sotxces: Esri, DeLcrme. USGS, HPS, Esri, HERE, DeLcrme,
Mapmylndia, © OpenStreetMap contributors; and the GIS user cornrrulnity
Figure 2. Map showing estimated arrival time of the leading edge of the plume in Utah.
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~ NM-UT state line
Estimated plume arrival
USGS gauge at Shiprock
Discharge (CF
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Expected Plume Signature in Utah
DEQ scientists identified a subset of metals most strongly associated with the Gold King Mine release by
reviewing recently released EPA data from samples that were collected immediately downstream of the
Gold King Mine over the first days following the incident. The initial analyses focused on dissolved
metals that:
1. Represented the majority of the metals released in the Gold King Mine release; and
2. Were particularly high relative to metal concentrations that have been previously documented in
the lower San Juan River.
The list of potential metals to be used to detect the signature of the plume was further refined by
reviewing data from samples collected in response to the Gold King Mine release to determine whether,
and to what extent, any metals concentrations remained elevated relative to background
concentrations as the leading edge of the plume reached the San Juan River. This analysis was not
intended to quantify the overall impacts of the release; rather it was intended to highlight elevated
concentrations that would likely be observable in the lower San Juan River in Utah. That is, DEQ aimed
to compare plume concentrations with pre-plume background concentrations to identify those
contaminants that would provide the best signature.
The above analysis was confined to the dissolved metals fraction that were released, because dissolved
metals present the most immediate threat to resident fish and wildlife in the San Juan River, or to stock
animals that drink water from the river. Total metals were also considered, but these data are more
difficult to interpret in the context of this event because:
Total metals are naturally high and variable in the San Juan River system due to local geology
and hydrology;
Metals associated with soil particles can enter the river system during storm runoff events,
three of which occurred between August 5 and August 12, 2015, and may overwhelm and mask
the signature of the plume;
Total metals are particularly susceptible to laboratory interference; and
A significant fraction of total metals likely is traveling along the bed of the river and would not
be reflected uniformly in water column samples.
The preliminary screen of priority pollutants to use as markers for this event revealed two principal
dissolved metals that could be used to trace the plume, if evident, through Utah:
Aluminum
Iron
An additional three metals were identified as complimentary tracers because they were a significant
component of the mine release, but at much lower concentrations;
Manganese
Zinc
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Cobalt
Together, these metals represent ~95% of potentially toxic metals that were released to the Animas and
San Juan Rivers. Some elements were eliminated as priority tracers because they are relatively non-toxic
or are naturally occurring in relatively high concentrations (e.g., calcium, sodium, and magnesium).
Finally, several metals were observed at elevated concentrations, but were eliminated as candidate
tracers (e.g., copper and lead), because they were not observable downstream due to dilution from the
San Juan River or due to other biogeochemical processes that may have retained the metals upstream.
Analysis of Trends in Water Quality Data
DEQ has prepared time-series plots (Figures 4 - 8; Appendix 1) that show the concentrations of water-
quality parameters through time at four separate sampling locations (Figure 1). The data include
samples collected by both DEQ and EPA.
Plots for sites at the New Mexico-Utah state line, Montezuma, and Sand Island are based on data from
DEQ. Plots for the sites at Shiprock and Hoback include only data from EPA. Sites are color coded as
described in the legend in the upper right corner of the plot. In addition, dates of significant rain events
are noted along the bottom of the plot as black triangles. Along the bottom axis, the date labels are
placed at midnight of that day. Samples were also collected at Mexican Hat, but were not included in the
plots because of the strong interference suspected by Chinle Wash, just upstream of Mexican Hat, on
water quality patterns.
Relevant water quality screening criteria for each parameter are also displayed on the plot as black
dashed lines. These criteria include:
Standards for domestic-source water
Warm water aquatic life
Agricultural uses
In addition to the lines displayed on the plots, the numeric values for each standard are presented in the
legend in the upper left corner of the plot. Parameters without established criteria for particular uses
are noted with NA for not applicable.
Where available, the historically observed ranges of parameters in the San Juan River from two data
sources, DEQ and USGS, are displayed as boxplots to the right of the time series data. These ranges
represent observed pre-spill conditions for the San Juan River.
Dissolved Metal Trends Linked to Plume
After identifying the metals from the release that would be most likely to manifest at Utah monitoring
locations, it was important to determine whether these elements were observed in samples collected
from the San Juan River in Utah. Since the Gold King Mine release was first announced, DEQ has been
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collecting samples at several locations in the San Juan River. The EPA, among other entities, has
responded similarly.
There are a couple of predictions that can be made by combining estimates of expected travel time with
monitoring results of key "tracer" constituents of the Gold King Mine release:
If the plume was measureable in the San Juan in Utah, DEQ would expect to see peak
concentrations of key constituents, especially dissolved iron and aluminum, at concentrations
higher than has been observed historically in the San Juan River. If coincident peaks in the
concentrations of manganese, zinc, or cobalt are also observed at atypically high concentrations,
this would further corroborate the interpretation that these peaks are the result of the Gold
King Mine release.
The peak concentrations of key these key tracer metals should occur at roughly the time
predicted by the travel time predictions and should occur increasingly later as the leading edge
of the plume moves downstream.
These predictions are manifest in data from DEQ and EPA water samples. This is evidenced in both the
time series graphs (Appendix 1) and in the tables that provide specific monitoring results. Both sources
of results show that peak concentrations of key tracers occurred at approximately the time predicted by
travel time estimates. Moreover, the peaks of tracer elements like aluminum and iron occurred first at
samples collected at the Utah-New Mexico border and then progressively later at downstream locations.
The box plots accompanying the time-series plots also reveal that peaks in dissolved aluminum and iron
were greater than concentrations observed from historical routine monitoring in the San Juan River.
Observed peak concentrations of these key metals persisted, depending on the monitoring location,
from about 12-24 hours (although precise estimates the extent of dispersion of the plume are
immediately impossible to determine due to the 12-hour lag between samples).
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Source water std = NA
Warm water aquatic life std = 750
Ag use water std = 5000
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
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Figure 4. Time-series plot of dissolved aluminum in the San Juan River, Utah.
Source water std = NA
Warm water aquatic iife std = 1000
Ag use water std = NA
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback(EPA)
Rain event
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Figure 5. Time-series plot of dissolved iron in the San Juan River, Utah,
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UDWQ USGS
Historical data
UDWQ USGS
Historical data
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Source water std = NA
Warm water aquatic life std = NA
Ag use water std = tOOO
NM-UT state line
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Figure 6. Time-series plot of dissolved cobalt in the San Juan River, Utah.
Figure 7. Time-series plot of dissolved manganese in the San Juan River, Utah.
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Source water std = NA
Warm water aquatic life std = 120
Ag use water std = 25000
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
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Figure 8, Time-series plot of dissolved zinc in the San Juan River, Utah.
12
UDWQ USGS
Historical data
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Total Metal Patterns in the River Difficult to Link to Plume
DEQ was not able to use patterns in total metals concentrations to evaluate the effects of the release on
the San Juan River. Total metals interpretation was complicated by high background concentrations,
storm and natural geology influence, the potential for laboratory interference, and sedimentation and
remobilization processes.
Background total metals concentrations
Total metal concentrations are naturally high in the San Juan River. In most cases, total concentrations
were one to several orders of magnitude greater than dissolved concentrations. Moreover, at several
monitoring locations, the highest total metal concentrations for several key constituents were greatest
in samples that were clearly collected before the spill arrived.
Storm influence
Based on historic water-quality monitoring data, total metal concentrations are highly variable in the
San Juan River, and much of this variation is considered to be natural. High levels of variation complicate
the ability to ascribe any single observation to the Gold King Mine release. This is especially true given
the monsoon rains that occurred episodically after the Gold King Mine release, which are expected to
increase the delivery of total metals to the San Juan River ecosystem.
A review of precipitation and hydrological data from the Colorado Basin Forecast Center demonstrates
the effect monsoon-rain events have on flow in the San Juan River. Two major precipitation events
occurred on August 8, 2015 and August 12, 2015. Figure 9 shows the intensity and areal coverage of
these events and the corresponding response to flow in the San Juan River. The August 12, 2015, storm
event was particularly strong and created a large flash flood event in the Chinle Creek basin, which
intersects the San Juan River between Bluff, UT and Mexican Hat, UT. Storm events of this magnitude
likely deliver large quantities of total metals from a variety of source areas throughout the watershed.
Further investigation is needed to statistically relate these events to observed total metal
concentrations.
Watershed geology
The geology of the San Juan River basin ranges widely in age from contemporary sand dunes and river
deposits to quartzite exposures over 500 million year old. Geologic strata exposed at the surface vary
from highly resistant rocks near the Goosenecks portion of the San Juan River to extremely erodible
marine shales near the Mancos River in New Mexico and Colorado. The combination of both highly
resistant and highly erodible geological strata within the watershed allow for great quantities of water
and sediment to be added to the main river system in response to sporadic but locally intense summer
monsoon storms. These factors contribute to the high sediment load of the San Juan River. In addition,
marine shales commonly have substantial concentrations of trace elements, including toxic metals that
may also be present in mine waste. Evaluation of the longer term impacts of the spill may include an
assessment of the surficial geologic deposits and soils within the watershed to develop a better
understanding of potential naturally occurring nonpoint sources of metals to the San Juan.
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Sediment deposition and remobilization
Flow in the San Juan River is largely influenced by spring snowmelt, summer monsoon rain events, and
reservoir release from Navajo Lake. An example of two summer monsoon events is presented in Figure
9. This figure demonstrates that the San Juan River can receive a significant amount of water from storm
events that occur in isolated sub-basins within the watershed.
Given the geology of the watershed, there is a significant amount of fine-grained sediment available for
transport by the San Juan River and its tributaries. These sediments exist as fine grained sands, silts, and
clay as well as some larger boulder and cobble bed load. Fine-grained bed load is particularly important
in the context of deposition and remobilization of metals delivered to the river in the initial plume.
During large flow events fine-grained sediments become highly mobile and are transported easily
throughout the system. This was observed in recent sampling events with the increase of total
suspended solids from upstream to downstream monitoring stations. When flow levels recede, these
fine-grained sediments are deposited first in backwater areas of the river channel then in the main river
channel as flow recedes further.
It is expected that total metals and the flocculants observed with the mine release will respond similarly
to fine-grained sediments. Metals and flocculants will continue to be deposited , mobilized, and
transported downstream with subsequent high flow events , ultimately being deposited in Lake Powell.
It is expected that eventually these will be capped off and covered up with fine-grained sands and silts
from future precipitation events.
Lab interference
Total metals are particularly susceptible to laboratory interference, especially under circumstances
where ambient conditions with elevated dissolved and suspended solids. Such interferences can alter
laboratory results because, among other things, they often necessitate dilution of samples prior to
analysis. Such dilutions are accounted for, but the variation in the extent of dilution from one collection
event to the next complicates data interpretation. This is especially true for constituents such as metals,
that are measured at very low (parts per billion) concentrations.
Water Quality Data Compared to Screening Values for River
Uses
The most important immediate question related to the Gold King Mine release on Utah's waters is
whether any observed increases in metals concentrations pose a threat to the uses of the San Juan
River. DEQ has addressed this concern by collaborating with Utah's Department of Health and
Department of Agriculture and Food to establish threshold values and appropriate ways for interpreting
these values for those uses that were determined to be at greatest threat from this event. These tables
and associated indicator values have been published daily and will continue on a weekly basis until
monitoring efforts associated with this event have ceased. Appendix 2 includes a detailed summary of
the screening values used in this analysis as well as comparison against water quality data collected from
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August 8, 2015 to August 17, 2015. These ongoing results continue to be evaluated with respect to the
threat that elevated concentrations potentially pose to several important uses of the San Juan River:
Drinking Water
Recreation
Fish and Wildlife
Agriculture
Generally, professionals from all state agencies have concluded that, even at peak concentrations, the
observable increase in metals from the Gold King Mine release have posed minimal threat to all of these
uses. Summary statements from other state agencies with respect to threats are summarized in the
following sections. Estimated results-values below the laboratory's reporting limit are not included in
this analysis but will be further evaluated by DEQ. These results generally show low-level concentrations
and are not expected to significantly affect the analysis outcome. DEQ's detailed screening-level analysis
tables and report are presented in Appendix 2. The following sections provide a description and
interpretation of current results.
Aquatic Life
In terms of immediate threat, the most appropriate criteria are those established in Utah Water Quality
Standards for acute (4-day) exposure to metals associated with the Gold King Mine release. A
comparison of monitoring data against these thresholds reveals a violation of acute criteria for dissolved
aluminum, at most locations, for two consecutive monitoring events (~12-18 hours). Dissolved iron also
exceeded acute concentrations, but only for a single sample event at the most upstream location.
Obvious effects from these exceeded values, such as fish kills, have not been reported. More subtle
effects, such as harm to particularly sensitive young life stages offish or any deleterious effects to less
obvious assemblages (e.g., macroinvertebrates) may have occurred, but given the relatively short
duration of metal peaks and the limited number of metals at elevated concentrations, DEQ does not
believe that such responses are likely. Nevertheless, Utah's Division of Wildlife Resources and the U.S.
Fish and Wildlife Service have ongoing monitoring activities aimed at the protection offish species to
help ascertain any more subtle, long-term effects of the Gold King Mine release.
Recreation
The total metals analysis provides results for metals that are both dissolved and present as very small
particles. Total metals analysis is used to evaluate recreational exposures so as to be as protective as
possible of human health.. Agency for Toxic Substance and Disease Registry (ATSDR) health-based
comparison values (CVs) were used when available. In some cases, EPA risk-based Regional Screening
Levels (RSLs) were used in the absence of an established CV. CVs exist for acute (up to two weeks),
intermediate (two weeks to one year) and chronic (more than one year) exposures. Intermediate CVs
were used followed by chronic CVs in the absence of intermediate CVs. Further analysis of this dataset
was provided by UDOH in a series of statements of evaluation for recreational exposures. The latest
evaluation as of the release of this document can be found here: Statement of Evaluation.
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Drinking Water Sources
DEQ's Division of Drinking Water (DDW) compared the measured levels of total metals and dissolved
metals from the San Juan River water samples to the EPA-established drinking water Maximum
Contaminant Levels (MCLs) for metals. For drinking water quality, it is more protective of public health
to use the total metals result to determine how safe water is to drink. Because of this, MCLs are
compared against the total metals analysis when treated waters are assessed for safety.
The sampling results from August 8, 2015, through Augustl5, 2015 so far indicate that:
The total metals in the untreated river water samples have exceeded the drinking water MCLs
for aluminum, arsenic, iron, manganese, and the action level of lead.
The dissolved metals in the untreated river water samples meet these drinking water MCLs.
Therefore, it is likely that the suspended particles in the river water contributed to the MCL exceedance
of aluminum, arsenic, iron, manganese, and lead.
Drinking water systems that can properly treat surface water and meet the required turbidity standards
established by the EPA can successfully remove the suspended particles during the water treatment
process. As the dissolved metals data meet MCLs, DDW finds that the San Juan River can be a viable
water source if adequate treatment (e.g., filtration, precipitation, etc.) exists to remove the suspended
particles and to meet turbidity standards.
DEQ continues to coordinate with three San Juan County water systems regulated by the State of Utah
(Mexican Hat, Bluff, and Sand Island) in regards to monitoring the public drinking water wells located
near the San Juan River. It is important to note that none of these three water systems draw their
source waters directly from the San Juan River. Mexican Hat's long-term monitoring strategy includes
taking metals samples from its wells this week, and continuing periodic metals sampling as needed
beginning in six months' time.
The compliance sampling data for all public water systems regulated by State of Utah are available from
DDW. To obtain the data from DDW, fill out the request form and fax the form to (801)536-4211.
Public water systems located on tribal lands are being managed by their appropriate authorities, for
example, Navajo Tribal Utility Authority (NTUA).
Residents with a private well can call a certified drinking water lab to get it tested. The laboratories
provide the required bottles, sampling instructions and return instructions.
Dissolved metals are usually considered more mobile and biologically available (can be absorbed by the
body). The screening values used in this table are from Utah's water quality standards protective of
source water for domestic use.
The Water Quality Interpretation Tool developed by Utah State University Extension Services allows
users to enter their water quality data online and receive interpretation of those data pertaining to
drinking water, irrigation water, livestock water, and environmental water state standards. The
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explanation of results from this tool provides information on the analyte health effects, the susceptible
populations, and typical routes of exposure.
Agriculture
The Utah Department of Agriculture and Food (UDAF) lifted all advisories against using San Juan River
water for crop irrigation and livestock watering on August 14, 2015.
Based on the latest DEQ evaluation of the San Juan River water sample data, Utah State University's
veterinary toxicologist reports that the river's highest levels of contamination posed no adverse effects
on plants, soils and animals, only short-term and minimal exposure risks. The UDAF advises farmers and
ranchers to remain cautious and report any changes in the health of their crops and livestock.
Evaluating Long-term Effects of the Spill on Utah's Waters
Over the long-term, DEQ scientists project that most metals from the Gold King Mine release that arrive
in Utah will ultimately be deposited in Lake Powell. Ideally, these metals will be covered by a sufficient
layer of non-toxic sediment to reduce aquatic life exposures to high metal concentrations. The high
sediment load of the San Juan River, the depositional area in the San Juan arm of Lake Powell, and the
long residence-time of water and its constituents in the lake before being transported downstream
(roughly 7.2 years), should help reduce the effects of this event. Many questions regarding the long-
term impacts of this spill remain unanswered. For example, impacts of the contamination on nearby
groundwater drinking water aquifers, aquatic ecosystems, and soils irrigated with river waters are just a
few of the many potential issues that will need to be addressed. These issues will require that DEQ, in
collaboration with other Utah agencies, develop a long-term monitoring plan.
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Appendix 1. Water Quality Trend Graphics
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Source water std = NA
Warm water aquatic life std = 750
Ag use water std = 5000
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o
CO
o
o
LO
CM
o
o
o
CM
O
O
LO
O
o
o
o
o
LO
o
UDWQ USGS
Historical data
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
o
o
o
o
o
o
o
o
o
o
o
o
O
o
o
o
o
o
o
o
o
o
o
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CO
G)
o
t
CM
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
UDWQ USGS
Historical data
-------
o
CNJ
LO
Source water std = 10
Warm water aquatic life std = 340
Ag use water std = 100
LO
o
o
CNI
p:
oo
\ O
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
O
O
O
CM
CO
CO
o
o
o
CM
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
O
o
o
CNJ
LO
LO
o
o
o
UDWQ USGS
Historical data
o
CO
03
H<
,o
CD
O
CNJ
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
o
o
o
o
o
o
o
o
o
o
o
o
O
o
o
o
o
o
o
o
o
o
o
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CO
G)
o
t
CM
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
CO
o
CNJ
UDWQ USGS
Historical data
-------
o
o
Source water std = 1000
Warm water aquatic life std = NA
Ag use water std = NA
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
O)
CO
H<
,o
03
00
o
o
o
"3"
o
o
o
CO
o
o
o
CM
o
o
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
o
O
o
O
O
o
O
o
O
o
o
o
O
o
O
o
O
o
o
o
o
o
o
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CNJ
Z
CNJ
Z
CNJ
Z
CO
G)
O
t
CN
CO
LO
to
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
-------
~0
%
o
in
w
Q
E
o
CO
o
CM
o
Source water std = 4
Warm water aquatic life std = NA
Ag use water std = NA
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
CD
m
o ©
~T"
LO
O
CM
CO
o
CM
CO
o
o
o
cm
CO
CO
o
o
o
cm
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
O
O
O
o
LO
0)
03
H<
,o
CD
GO
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T~
LO
O
CM
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
o
o
~T"
LO
o
CM
CM
CO
o
o
~r
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
LO
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
-------
O)
CO
-I»
.O
E
¦o
CO
O
CM -
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
O
CM
CO
o
o
o
cm
CO
CO
o
o
o
cm
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
o
o
~T"
LO
O
CM
CM
CO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
O
o
C\J
O
UDWQ USGS
Historical data
o
LO
O)
03
H<
,o
E
o
-C
o
o
o
o
10
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T~
LO
O
CM
CO
O
O
~T"
LO
o
CM
CO
CO
O
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
1 r
£= LO
O v-
o o
2 CM
1 r
£= LO
O v-
O O
2 CM
1 r
£= LO
O v-
O O
2 CM
O
o
~T"
LO
o
CM
LO
CO
O
O
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
o
LO
o
o
o
LO
UDWQ USGS
Historical data
-------
Source water std = NA
Warm water aquatic life std = NA
Ag use water std = 1000
LO
LO
o
CNI
p:
00
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
O
O
O
CM
CO
CO
o
o
o
CM
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
O
o
LO
LO
o
o
o
UDWQ USGS
Historical data
o
CO
0)
03
H<
,o
03
-Q
O
O
o
"3-
o
CM
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
O
o
~T"
LO
o
CM
CM
CO
O
O
~r
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
LO
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
-------
Source water std = NA
¦ Warm water aquatic life std = 13
Ag use water std = 200
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
CD -
o
CNJ -
O
~T"
LO
O
CM
CD
CO
O
CM
CO
o
o
o
CM
CO
CO
o
o
o
CM
G)
CO
£= LO
O V-
o o
2 CM
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
o
o
£= LO
O v-
O O
2 CM
O
o
o
CNJ
o
o
o
CO
o
CD
o
o
CNJ
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
O
o
~T"
LO
o
CM
CM
CO
O
O
~r
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
LO
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
-------
o
o
LO
I 1
UDWQ USGS
Historical data
Source water std = NA
Warm water aquatic life std = 1000
Ag use water std = NA
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
CO
H<
,o
o
o
o
o
o
o
o
o
o
CD
o
o
o
o
CM
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
T
T
UDWQ USGS
Historical data
-------
Source water std = 15
Warm water aquatic life std = 65
Ag use water std = 100
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
c\i
o
c\i
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
LO
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
LO
o
o
o
UDWQ USGS
Historical data
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CO
G)
O
t
CM
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
LO
CM
o
o
CM
O
LO
O
O
O
LO
UDWQ USGS
Historical data
-------
o
CO
LO
CM
O
CM
LO
LO
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
CO
LO
CM
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
LO
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
o
O
LO
O
o
o
"3"
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
o
o
LO
o
o
o
o
o
o
CO
o
o
o
CM
o
o
o
o
o
o
CO
o
o
o
CM
o
o
o
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CNJ
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CO
G)
O
t
CN
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
-------
CD
O)
"O
%
o
(/)
(/)
"3"
CO
CD
TD
-Q
O
CNJ
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
CM
CO
o
o
o
cm
CO
CO
o
o
o
cm
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
O
o
03
H<
,o
o
CO
LO
CNJ
o
CNJ
LO
CD
"O
§ °
o T~
LO
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T~
LO
O
CM
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
O
o
~T"
LO
o
CM
CM
CO
O
O
~r
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
LO
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
-------
~0
%
o
(/)
cn
o
CO
LO
c\i
o
c\i
LO
Source water std = NA
Warm water aquatic life std = 468
Ag use water std = NA
CD
O P
LO
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
O
\
o
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
CO
LO
c\i
UDWQ USGS
Historical data
0)
03
H<
,o
CD
O
o
"3"
o
CM
O
O
O
CO
O
CD
O
"3"
O
CM
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
o
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
o
o
o
o
o
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CNJ
Z
CNJ
Z
CNJ
Z
CO
G)
O
t
CM
CO
LO
to
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
O
CM
O
O
O
CO
O
CD
O
O
CM
UDWQ USGS
Historical data
-------
Source water std = 50
Warm water aquatic life std = 18.4
Ag use water std = 50
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
c\i
LO
o
o
o
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
UDWQ USGS
Historical data
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
CD
^
CSJ
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CO
G)
O
t
CN
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
UDWQ USGS
Historical data
-------
GO
O
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
GO
o
0)
"O
%
0
(/)
C/)
b
1
0)
CD
o
o
CNJ
o
CD
o
o
CNJ
o
o
o
o
CM
CO
o
o
o
CM
CO
CO
o
o
o
CM
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
O
o
LO
03
H<
,o
I
w
LO
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
LO
o
o
o
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
o
o
o
o
o
o
o
o
o
o
o
o
O
o
o
o
o
o
o
o
o
o
o
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CM
Z
CO
G)
o
t
CM
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
-------
CD
H<
0)
o
o
o
o
o
CM
O
o
o
o
LO
o
o
o
o
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
o
o
o
LO
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
LO
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
0)
"O
%
o
(/)
C/)
b
o
C\J
o
LO
o
o
o
LO
o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CO
G)
O
t
CN
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
-------
03
H<
|2
E
3
TO
LO
O
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
T
LO
O
CM
CO
o
CM
CO
o
o
o
o
o
-<3-
o
o
o
o
o
o
o
o
o
o
o
CD
o
o
o
o
o
CM
o
o
o
CM
CO
CO
o
o
o
CM
G)
CO
£= LO
O v-
o o
2 CM
£= LO
O v-
o o
2 CM
£= LO
O v-
O O
2 CM
CM
£= LO
O v-
O O
2 CM
CO
£= LO
O v-
O O
2 CM
£= LO
O v-
O O
2 CM
LO
£= LO
O v-
O O
2 CM
CO
O
O
O
o
O)
(/)
p
o
V)
"O
%
o
m
m
CO
-I'
,o
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
~T~
LO
O
CM
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
G)
CO
o
o
~T"
LO
o
CM
o
CO
o
o
~r
LO
o
CM
o
o
~T"
LO
o
CM
CM
CO
o
o
~r
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
~T"
LO
o
CM
LO
CO
o
o
~T"
LO
o
CM
CO
CO
o
o
~T"
LO
o
CM
CO
o
o
-------
o
+
CD
LO
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
+
CD |
O
CD
O
+
CD
O
L6
o
o
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
lB
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
Source water std = NA
¦ Warm water aquatic life std = NA
Ag use water std = 100
CO
CD -
= ^ -
CSJ -
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CO
G)
O
t
CN
CO
LO
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
-------
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
t
o
\
o
\
o
\
o
\
O
\
o
\
o
\
O
\
o
\
O
\
o
O
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
o
C\J
2
C\J
2
C\J
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CNj
2
CO
G)
o
t
C\J
CO
55
CD
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
Source water std = NA
Warm water aquatic life std = 120
Ag use water std = 25000
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
LO
£=
T
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
O
\
o
\
O
o
o
o
O
o
O
o
O
o
o
o
O
o
O
o
O
o
O
o
o
o
o
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CN
Z
CO
G)
O
t
CN
CO
LO
CO
CO
CO
CO
\
CO
CO
CO
CO
CO
CO
CO
CO
o
CO
LO
CM
T
T
UDWQ USGS
Historical data
-------
NM-UT state line
Montezuma
Sand Island
Shiprock (EPA)
Hoback (EPA)
Rain event
o
o
o
o
oo
o
o
CD
o
o
o
o
CM
o
UDWQ
USGS
Historical data
-------
Appendix 2. Screening Value Analysis
-------
Screening Values used in Evaluation of San Juan River Water Quality Samples
Screening values are taken from Agency for Toxic Substance and Disease Registry (ATSDR) comparison values (CVs) for drinking water when available. When
ATSDR values were not available, EPA Regional Screening Levels (RSLs) for residential tap water were used. Total metal data was used for assessment of
human-health based effects. Agricultural Screening Values are derived from National Academy of Science (NAS) Water Quality Criteria, 1972 (the Blue Book).
Those guidelines are reprinted in EPA's Guidelines for the Reuse of Waters for Irrigation. Dissolved metal values were used for the assessment of agricultural use
waters. Contaminants that do not exceed screening values are not considered to pose a risk of adverse health effects. Estimated results values below the
laboratory's reporting limit are evaluated in this analysis. These results generally show low level concentrations and do not significantly affect the analysis
outcome.
Anatyte CAS # Units
Irrigation Waters (ng/L) [NASt 1972)
Utah WQ Standards for San Juan River
[Dissolved metals]
Drinking Water CY (ppb)
Health-Based
Comparison
Value for Water
Ingestion (CV)
[Total Metals]
CV Type and Source
Livestock Water (ug L)
Long-Term
Short-Term
1C
(Domestic)
3B
(warm
water
fish)
(1-hour)
3B
(warm
water
fish)
[4-day]
4
(agriculture)
Hardness
.
mgL
180 mgL (UA)
Hardness
Aluminum
7429-90-5
MgL
10.000
Child Intermediate EMEG
5,000 (NAS)
5,000
20,000
750
87
Alummum
Antimony
7440-36-0
MgL
4
Child RMEG
No Data Available
No Data Available
No Data Available
Aniimonv
Arsenic
7440-38-2
MgL
3
Child RMEG & Chronic EMEG
200 (NAS)
100
2,000
10
340
150
100
Arsenic
Barium
7440-39-3
MgL
2,000
Child Intermediate EMEG
No Data Available
No Data Available
No Data Available
1000
Barium
Bervflrum
7440-41-7
HgL
20
Child RMEG & Chronic EMEG
No Data Available
No Data Available
No Data Available
<4
Beryllium
Cadmium
7440-43-9
W'L
5
Child Intermediate EMEG
50 (NAS)
10
50
10
2
0.25
10
Cadmium
Calcium
7440-70-2
MgL
No CVs available
500,000 (UA)
No Data Available
No Data Available
Calcium
Chromium
7440-47-3
MgL
60
Child RSL, non-cancer, Cr(VI)
1,000 (NAS)
100
1,000
50
16 (VI);
11 (VI);
100
Chromium
Cobalt
7440-48-4
M*L
100
Child Intermediate EMEG
1,000 (NAS)
50
5,000
Cobalt
Copper
7440-50-8
MgL
100
Child Intermediate EMEG
500 (NAS)
200
5,000
13
9
200
Copper
Iron
7439-89-6
MgL
14.000
Child RSL. non-cancer
Limit Not Considered
Necessary- (NAS)
5,000
20,000
1000
1000
Iron
Lead
7439-92-1
MgL
15
Child non-carcinoeenic RSL
100 (NAS)
5,000
10,000
15
65
2.5
100
Lead
Maenesium
7439-95-4
MgL
-
No CVs available
250,000 (UA)
No Data Available
No Data Available
Magnesium
Manganese
7439-96-5
m*l
500
Child RMEG
Limit Not Considered
Necessary (NAS)
200
10,000
Manganese
Mohebdenum
7439-98-7
MgL
50
Child RMEG
No Data Available
10
50
Mohebdenum
Nickel
7440-02-0
MgL
200
Child RMEG
No Data Available
200
2.000
468
52
Nickel
Potassium
7440-22-4
MgL
No CVs available
No Data Available
No Data Available
No Data Available
Potassium
Selenium
7782-49-2
MgL
$0
Child RMEG
50 (NAS)
20
20
50
18.4
4.6
50
Selenium
Silver
7440-22-4
MgL
50
Child RMEG
No Data Available
No Data Available
No Data Available
50
1.6
Silver
Sodium
7440-23-5
MgL
-
No CVj available
1,000,000 (UA)
No Data Available
No Data Available
Sodium
ThaHrum
7440-28-0
MgL
0.2
Child non-carcinogenic RSL
No Data Available
No Data Av ailable
No Data Av ailable
Thallium
Vanadium
7440-62-2
MgL
100
Child Intermediate EMEG
100 (NAS)
100
1,000
Vanadium
Zinc
7440-66-6
MgL
3.000
Child Intermediate EMEG
25.000 (NAS)
2.000
10.000
120
120
Zinc
Mercury
7439-97-6
MgL
0.63
Child non-carcinogenic RSL.
elemental Hg. MgL
10 (NAS)
No Data Available
No Data Available
2
0.012
Mercury
TDS
mg/L
1200 (Utah)
500,000-1,000,000 (NAS)
PH
6.5-9 (Utah)
4.5-9 (NAS)
RMEG: ATSDR Reference Dose Media Evaluation Guide
EMEG: ATSDR Environmental Media Evaluation Guide
RSL: EPA Regional Screening Level
-------
Comparison of San Juan River Raw Water Data with Finished Drinking Water Screening Values - Total Metals
No Exceedence
|Above Screening Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Health Based Comparison Values for Water Ingestion
10,000
4
3
2,000
20
5
(blank)
60
100
14,000
15
(blank)
500
0.63
50
200
(blank)
50
(blank)
0.2
100
3,000
Monitoring
Location
Site Description
Collection
Date
Collection
Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
8/8/2015
1:23 PM
47,400
0.27
12.5
1300
3.42
1.27
336
23.9
22.8
41.4
24,800
44.5
56.3
2,320
0.077
0.76
40.5
12.2
1.09
0.27
38.6
0.41
61.2
147
8/9/2015
12:02 PM
33,900
0.499
12.3
702
2.62
0.907
108
17.4
16.8
59.3
29,400
151
20.3
1,100
0.07
1.37
23
9.04
1.07
1.09
29.8
0.38
50.5
160
8/9/2015
3:05 PM
26,700
0.573
13.5
606
2.08
0.734
92.8
14.2
13.5
63
28,600
185
17.2
942
0.063
1.58
18.2
7.53
0.97
1.34
27
0.3
41.6
172
8/9/2015
6:00 PM
24,600
0.502
10
532
1.8
0.68
86.2
13.7
12.4
47.6
24,100
111
15.8
870
0.045
1.33
16.8
7.04
0.73
0.79
26.1
0.25
37.8
138
8/9/2015
9:02 PM
31,000
0.416
9.59
554
2.25
0.632
78.8
15.5
14.7
49.7
26,500
83.5
15.3
887
0.048
1.01
18.4
7.18
0.7
0.57
29.5
0.31
41.5
137
8/10/2015
9:11 AM
39,900
0.163
11
1730
3.97
1.15
90.8
21
24.8
69.6
35,400
73.5
20.2
1,450
0.115
0.53
29.7
8.24
0.94
0.49
36.6
0.39
48.2
668
8/10/2015
2:06 PM
43,700
0.19
12.3
889
4.04
0.884
86.7
23.7
25.4
69.7
39,100
69.3
20.1
1,390
0.117
0.62
30.8
8.89
0.96
0.42
38.5
0.42
53.4
897
4954000
San Juan R @ US160 Xing in CO
8/11/2015
8:50 AM
77,000
0.216
19.9
1230
6.66
1.2
109
29.5
37
104
54,800
82.2
24.9
1,930
0.187
0.56
39.4
11.8
1.35
0.57
42.9
0.87
69.4
223
8/11/2015
1:17 PM
56,900
0.181
14.2
971
4.97
0.916
95
21.8
27.3
76.7
40,300
62.6
20
1,440
0.13
0.61
29.6
9.65
1.08
0.42
37.4
0.68
51.8
159
8/12/2015
9:50 AM
31,100
0.23
11.1
766
3.16
0.905
164
16.1
18.6
43.7
22,600
47.4
24.7
1,250
0.098
0.77
28.9
7.9
1.04
0.31
32.7
0.46
43.7
131
8/12/2015
2:04 PM
28,500
0.252
9.21
683
2.52
0.641
146
13.2
14.5
34.3
18,100
35.8
24.5
1,130
0.058
0.48
22
7.37
0.75
0.21
28.7
0.28
41.4
96.2
8/13/2015
10:01 AM
38,700
0.156
12
1110
5.62
0.941
124
14.9
28.9
79.3
31,100
66.5
22.5
1,670
0.153
0.53
28.9
8.54
1.2
0.4
45
0.58
51
177
8/14/2015
2:33 PM
44,300
0.413
12.5
918
4.89
0.984
114
23.7
27.1
70.5
39,100
64.3
22.4
1,360
0.148
0.77
34.5
10.4
1.32
0.38
54.8
0.71
60
197
8/15/2015
12:04 PM
14,200
0.279
4.7
262
1.08
0.366
68.1
8.75
6.18
18.2
12,300
17.4
12.7
368
0.03
1.13
8.78
5.16
0.63
0.14
27.7
0.19
25.7
58.9
8/16/2015
9:15 AM
9,500
0.837
4.89
358
0.94
0.302
78
6.21
5.69
14.9
10,000
15.8
13.3
338
0.028
1.23
10.3
5.78
0.86
0.35
31.2
0.23
16.1
215
8/8/2015
2:54 PM
67,300
0.395
20.2
1590
6.36
2.49
390
38.8
41.1
82.4
50,400
91.5
59.1
3,010
0.222
1.3
75.8
17.7
1.93
0.66
51.7
1.18
82.8
286
8/10/2015
10:13 AM
32,300
0.216
11.5
1960
2.72
0.707
93.7
17.3
18.3
56.4
29,700
79.3
20.1
1,130
0.072
0.83
23.5
7.45
0.9
0.52
34.6
0.28
43.8
821
8/10/2015
2:58 PM
39,100
0.228
11.8
1700
3.71
0.881
97.1
22.1
23.2
67.3
35,800
75.8
22.5
1,400
0.098
0.93
29.6
8.49
1.08
0.75
34.9
0.44
49
658
8/11/2015
9:44 AM
52,800
0.295
12.6
918
4.27
0.998
99.7
23.1
25.1
67.9
40,200
62.9
22.5
1,410
0.122
0.75
29.3
9.63
1.2
0.6
36.9
0.67
55.2
166
8/11/2015
2:20 PM
54,700
0.232
15
1060
5.16
1.04
102
24.2
29.1
80.3
44,700
70.2
24
1,570
0.137
0.65
32.4
9.47
1.23
0.45
38.6
0.73
58.4
183
4953990
San Juan R @ Town of Montezuma
8/12/2015
10:37 AM
31,500
0.247
10.2
720
3.62
0.855
108
14.7
19.5
51.7
24,400
49.1
18.4
1,190
0.078
0.45
22.7
7.04
1.06
0.48
33
0.46
38.6
131
8/12/2015
2:57 PM
35,000
0.272
10.7
725
3.97
0.916
130
17
19.5
51.4
26,500
54.1
20.5
1,120
0.112
0.4
27.7
8.29
1.12
0.31
34.5
0.56
40.8
144
8/13/2015
4:46 PM
23,700
0.156
10.1
722
3.57
0.708
127
9.33
17.3
47.9
17,800
44.3
20.8
1,270
0.103
0.68
19.3
6.73
0.95
0.31
34.2
0.32
34.2
109
8/14/2015
9:55 AM
62,000
0.443
16
1400
7.03
1.41
153
29.9
39.8
106
54,300
90.8
32.9
2,060
0.247
0.72
48.4
12.7
1.49
0.5
59.5
1.04
76.4
265
8/15/2015
11:31 AM
29,200
0.329
8.5
566
2.65
0.806
90.2
15.5
15
39.3
24,900
36.5
19.7
862
0.075
1.06
18.7
7.88
0.93
0.25
39.4
0.4
43.3
114
8/16/2015
10:02 AM
13,600
0.232
5.56
517
1.15
0.305
78.8
7.56
7.12
21.1
13,200
19.5
14.6
435
0.033
1.04
10.1
7.25
0.85
0.16
39.3
0.22
21.6
238
8/17/2015
4:07 PM
4,160
0.35
2.63
141
0.41
0.254
65.6
2.42
1.87
6.89
3,510
6.05
13.5
150
0.012
1.5
3.06
3.63
0.66
0.11
31
0.14
8.04
20.2
8/8/2015
4:19 PM
55,700
0.436
15.9
1090
5.21
1.99
252
32.4
34.3
80.8
47,800
74.7
33.8
1,700
0.158
1.75
65.8
13.3
2.14
0.63
58.8
1.29
64.7
242
8/10/2015
11:15 AM
27,000
0.3
13.2
1530
2.3
0.788
104
15.9
15.6
60
28,500
140
21.2
1,090
0.065
1.35
22.1
7.83
1
1.22
30.9
0.26
44.3
664
8/10/2015
3:58 PM
28,700
0.293
10.7
726
2.61
0.713
99.9
16.1
17.3
54.7
27,700
84.7
20.4
1,170
0.073
0.88
22.3
7.29
0.89
0.53
33.2
0.25
40.9
960
8/11/2015
10:53 AM
47,800
0.218
11.5
913
3.87
1.01
98.9
21.7
22.6
61.6
37,000
63.5
22.2
1,310
0.113
0.71
27.7
9.34
0.88
0.44
36.4
0.58
52.7
167
8/11/2015
3:01 PM
48,700
0.272
12
900
4.23
1.04
102
21
23.6
64.2
36,800
63.4
22.4
1,400
0.115
0.86
28
9.46
1.1
0.44
38.2
0.62
51.5
163
4953250
San Juan R @ Sand Island
8/12/2015
11:12 AM
45,400
0.202
14.9
971
5.16
0.94
109
20
27.9
76.7
34,600
67.4
21.9
1,670
0.128
0.34
30.3
8.43
1.1
0.38
38.4
0.57
51.4
176
8/12/2015
5:06 PM
30,600
0.259
10.3
718
3.61
0.712
90.9
13.6
19.2
53.4
23,700
49.1
17.3
1,190
0.08
0.52
21.7
6.84
0.92
0.49
33.2
0.41
38
126
8/13/2015
11:28 AM
19,300
0.215
8.77
661
2.52
0.744
168
8.79
13.6
33.6
12,900
35.6
22.8
1,190
0.06
0.86
18.8
6.83
1.11
0.45
31.6
0.29
32.9
92.7
8/14/2015
11:02 AM
66,300
0.545
16.8
1460
7.48
1.4
148
29.8
41.8
116
58,200
96
35.6
2,160
0.27
0.62
49.2
12.5
1.56
0.57
55.7
1.1
77.4
288
8/15/2015
10:30 AM
37,600
0.394
11.2
826
4.1
0.984
108
20.7
22.2
57.6
32,300
54
23.1
1,230
0.163
1.09
27.8
9.22
1.36
0.51
51
0.63
53.5
160
8/16/2015
11:06 AM
24,600
0.279
7.87
1360
2.25
0.528
86.1
13.6
12.1
33.8
23,300
31.6
18.8
642
0.063
1.1
18
7.32
1.11
0.55
39.4
0.45
32.5
632
8/17/2015
3:33 PM
10,200
0.454
5.03
300
0.97
0.286
85
6.25
5.91
17
10,200
17.2
16.7
414
0.03
1.26
10.2
5.05
0.87
0.17
31.8
0.19
17
55.5
These data are provisional and subject to change and are undergoing DWO's quality assurance and quality control procedures. Data are released in
the interest ofproviding timely data to the public. Neither DWO nor the State of Utah may be held liable for any damages resulting fi'om its use.
-------
No Exceedence
|Above Screening Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Health Based Comparison Values for Water Ingestion
10,000
4
3
2,000
20
5
(blank)
60
100
14,000
15
(blank)
500
0.63
50
200
(blank)
50
(blank)
0.2
100
3,000
Monitoring
Location
Site Description
Collection
Date
Collection
Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
5:40 PM
5:40 PM
63,400
1.31
16.3
1,540
7.23
1.5
167
29.4
41.5
103
51,900
86.7
30.6
2,800
0.18
1.3
47.8
14.4
1.43
0.56
63.9
0.84
70.5
261
11:53 AM
11:53 AM
90,800
0.171
20.6
2,300
7.61
1.53
314
43.1
40.2
72.8
43,400
82.1
57
3,230
0.142
0.65
70.9
19.7
1.37
0.4
46.1
0.62
80
843
4:44 PM
4:44 PM
80,600
0.316
22.7
1,910
6.12
1.27
254
36.8
32.8
69.8
38,100
171
49.4
2,430
0.133
0.67
58.4
18.1
1.28
1.1
52.6
0.44
83.3
815
11:31 AM
11:31 AM
111,000
0.193
22.2
2,430
8.13
1.39
259
43.5
38.5
74.3
47,300
102
57.4
2,710
0.175
0.58
64.6
22.2
1.25
0.59
57.8
0.83
88.4
209
3:43 PM
3:43 PM
56,400
0.345
13.3
1,350
5.09
1.09
150
23.5
25.3
61
35,900
75.1
30.1
1,660
0.13
0.77
34.2
11.7
0.93
0.48
41.6
0.59
57.2
168
4953000
San Juan R @ Mexican Hat US 163 Xing
12:09 PM
12:09 PM
54,700
0.775
17.5
1,350
6.77
1.17
186
23.2
33.2
80.8
37,500
82.9
33.3
2,170
0.143
0.31
38.9
10.7
1.22
0.49
44.4
0.6
63.7
190
5:50 PM
5:50 PM
71,400
0.224
22.7
2,010
8.74
1.55
282
28.5
40.1
82.4
38,600
101
47.9
3,070
0.18
0.23
51.7
14
1.53
0.54
55.6
0.63
78.5
210
12:05 PM
12:05 PM
44,700
1.9
16.5
1,450
5.44
1.25
246
18.3
25
49.5
21,600
62.5
41.9
1,840
0.127
0.68
39.2
12.5
1.59
0.52
48.8
0.43
66.1
145
11:43 AM
11:43 AM
124,000
1.14
37.2
4,320
15.2
3.74
720
51.1
59.6
84.2
46,900
166
105
5,630
0.372
0.92
111
30.4
2.41
1.11
78.6
0.99
115
270
9:43 AM
9:43 AM
63,700
1.16
16.8
1,620
7.29
1.46
207
29.8
35.5
79
45,100
86.7
40.7
2,330
0.198
0.96
47.8
14
1.57
0.63
59.6
0.86
75.5
220
11:58 AM
11:58 AM
34,300
0.18
9.96
892
2.87
0.6
111
17.1
16.3
40.2
25,600
39.4
22.6
976
0.077
0.79
24
10.6
0.97
0.19
47.6
0.42
40.5
294
3:04 PM
3:04 PM
16,800
0.698
6.85
496
2.07
0.429
92.3
8.24
9.82
24.3
13,500
27.1
18
641
0.063
1.06
14.1
6.41
0.98
0.33
38.4
0.26
26.2
72.6
2:42 PM
2:42 PM
42,900
0.144
18.4
1,760
7.39
1.47
355
15.6
32.3
68.8
23,000
83.4
49.7
2,960
0.185
0.56
35.7
11.5
1.39
0.49
52
0.41
64.3
162
2:33 PM
2:33 PM
73,900
0.377
21.7
2,040
7.21
2.22
422
33.8
35.1
59.7
34,700
89.2
63.4
2,900
0.168
1.03
62.9
17.3
1.82
0.66
59.7
0.67
84.5
198
4952940
San Juan R @ Clay Hills
2:30 PM
2:30 PM
154,000
0.281
36.6
4,170
16.6
2.88
960
55.3
63.1
93.2
54,000
175
110
5,740
0.33
0.73
110
33
2.38
0.92
82.9
1.01
116
294
2:46 PM
2:46 PM
91,000
0.175
22
2,250
8.19
1.52
253
40.5
45.4
104
64,500
105
53.5
2,850
0.228
0.62
65.8
19.5
1.88
0.48
63.3
1.12
89.8
477
1:03 PM
1:03 PM
26,200
0.544
9.76
920
3.44
0.737
132
11.3
16.2
39.4
18,300
43.8
24.3
1,240
0.098
1.04
20.8
8.96
1.11
0.54
48.6
0.41
40.7
105
These data are provisional and subject to change
the interest of providing timely data to the public.
and are undergoing DWO's quality assurance and quality control procedures. Data are released in
Neither DWO nor the State of Utah may be held liable for any damages resulting fi'om its use.
-------
Comparison of San Juan River Raw Water Data with Screening Values for Domestic Source Water - Dissolved Metals
No Exceedence
lAbove Screening
Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Utah Domestic Source Criteria
(blank)
10
1,000
4
10
(blank)
50
(blank)
15
(blank)
2
(blank)
50
(blank)
Monitoring
Location
Site Description
Collection
Date
Collection Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
8/8/2015
1:23 PM
217
0.52
1.34
222
0.04
ND
51.5
ND
0.13
2.24
95.8
ND
7.85
2.94
ND
1.87
ND
2.96
0.72
ND
32.2
ND
4.86
15.3
8/9/2015
12:02 PM
258
0.34
0.63
274
ND
ND
50.6
ND
0.08
2.48
119
ND
6.86
2.69
ND
2.01
ND
2.61
0.56
0.03
28.5
ND
1.76
18.5
8/9/2015
9:02 PM
329
0.35
0.95
341
0.04
ND
46
ND
0,14
3.47
198
0.27
6.3
4.14
ND
1.94
ND
2.38
0.54
ND
30
ND
2.07
15.4
8/10/2015
9:11 AM
172
0.46
0.99
233
ND
ND
44.6
ND
0.07
3.21
103
0.39
6.01
1.64
ND
2.03
ND
2.51
0.58
ND
34.1
ND
1.74
19.7
8/10/2015
2:06 PM
1050
0.71
1.3
220
0.09
ND
44.2
ND
0.41
3.35
732
1.04
6.02
12.8
ND
1.92
0.84
2.72
0,65
0.06
35.1
ND
3.64
18
San JuanR @ US160
Xing in CO
8/11/2015
8:50 AM
3290
0.36
1.72
451
0.1
ND
39.8
ND
0.49
4.85
1520
1.1
5.05
19
0.02
1.65
1.19
3
0.97
ND
43.7
ND
3.9
19.1
4954000
8/11/2015
1:17 PM
720
0.05
1.33
334
ND
ND
41.7
ND
0.16
3.03
366
0.27
5.11
5.1
ND
1.58
ND
2.91
0.76
ND
37
ND
2.46
14.9
8/12/2015
9:50 AM
104
0.59
0.88
178
ND
ND
52.1
ND
0.06
2.39
ND
ND
7.2
ND
ND
1.47
ND
2.79
0.78
0.03
30.3
ND
1.9
14.8
8/12/2015
2:04 PM
155
0.55
1.21
151
ND
ND
47.9
ND
0.05
2.61
ND
ND
6.97
1.82
ND
1.48
ND
2.74
0.73
ND
27.3
ND
2.87
16.5
8/13/2015
10:01 AM
257
0.16
1.25
213
0.03
ND
48.3
ND
0.12
3.67
148
0.37
6.48
3.16
ND
1.89
ND
2.87
0.86
ND
42.5
ND
2.1
21.9
8/14/2015
2:33 PM
64.8
0.42
1.7
72.3
0.04
ND
53.4
ND
0.13
3.86
ND
ND
6.61
1.8
ND
3.65
3.14
3.66
1.1
ND
52.4
0.04
4.11
ND
8/15/2015
12:04 PM
47.5
0.45
1.36
65.2
ND
ND
52.8
ND
0.05
1.35
ND
ND
7.91
ND
ND
2.25
ND
2.61
0.61
ND
25.9
ND
2.61
ND
8/16/2015
9:15 AM
54.4
1.12
0.88
179
0.04
ND
53.9
ND
ND
2.91
ND
ND
8.18
ND
ND
1.72
ND
2.54
0.6
0.19
26.1
ND
1.92
12.6
8/8/2015
2:54 PM
136
0.75
1.06
223
0.04
ND
71.5
ND
0.13
2.72
ND
ND
9.92
ND
ND
2.62
0.8
3.84
1.11
0.04
43.5
ND
2.54
21
8/10/2015
10:13 AM
218
0.66
0.94
262
ND
ND
49.8
ND
0.08
3.24
144
0.46
7.7
3.22
ND
2.03
ND
2.69
0.57
0.05
32.1
ND
2.13
17.3
8/10/2015
2:58 PM
94.5
1.31
0.93
200
0.03
ND
48.6
ND
0.06
2.48
ND
0.3
7.35
ND
ND
2.32
ND
2.59
0.61
0.25
31.8
ND
1.96
14.6
8/11/2015
9:44 AM
462
0.57
1.17
314
ND
ND
44.6
ND
0.13
2.66
227
ND
6.49
3.31
ND
1.72
ND
2.64
0,68
0.03
37.1
ND
2.21
12.9
8/11/2015
2:20 PM
1400
0.14
1.25
298
0.04
ND
44.8
ND
0.24
3.47
668
0.49
6.57
9.99
ND
1.72
0.95
2.96
0.74
ND
38.3
ND
2.73
14.3
4953990
San Juan R @ Town of
8/12/2015
10:37 AM
67.5
0.8
1.1
202
0.03
ND
48.3
ND
ND
2.49
ND
ND
7.23
ND
ND
1.66
ND
2.67
0.8
0.04
31.9
ND
1.68
13.5
Montezuma
8/12/2015
2:57 PM
375
0.82
0.91
176
ND
ND
48.9
ND
0.09
4.34
296
ND
7.5
2.28
ND
1.64
ND
2.84
0.72
0.03
33.8
ND
1.99
15.9
8/13/2015
4:46 PM
330
1.88
1.28
240
0.07
ND
49.4
ND
0.18
3.75
192
ND
8.08
5.3
ND
1.91
0.98
2.62
0,98
0.24
32.9
0.03
3.12
32.7
8/14/2015
9:55 AM
24.8
0.58
1.27
85.1
0.04
ND
55.1
ND
0.15
3.79
ND
ND
7.81
ND
ND
2.84
1.76
3.51
0.99
0.04
53
0.03
3.07
ND
8/15/2015
11:31 AM
68.1
0.64
1.58
73.6
0.04
ND
55
ND
0.24
4.38
ND
ND
8.57
3.36
ND
2.43
1.09
3.16
0.89
0.07
35.8
ND
3.54
ND
8/16/2015
10:02 AM
61.8
0.84
1.17
145
0.06
ND
57.5
ND
0.09
3.01
ND
ND
9.36
ND
ND
1.99
ND
2.96
0.67
0.28
30.3
0.05
2.16
9.78
8/17/2015
4:07 PM
27.3
0.29
1.17
80.4
ND
ND
60.2
ND
0.14
1.87
ND
ND
11.6
2.4
ND
1.97
ND
2.82
0.63
ND
29.4
ND
2.18
ND
8/8/2015
4:19 PM
214
1.38
1.03
294
0.06
ND
73.7
ND
0.12
3.86
104
ND
9.24
2.55
ND
3.3
1.01
4.11
1.43
0.12
51.2
ND
2.22
19
8/10/2015
11:15 AM
124
1.24
0.88
192
ND
ND
53.2
ND
0.07
2.07
ND
0.29
8.4
ND
ND
2.38
ND
2.86
0.69
0.25
28.4
ND
1,75
13.7
8/10/2015
3:58 PM
108
0.57
1.07
184
ND
ND
48.4
ND
0.06
1.96
ND
0.32
7.83
ND
ND
2.26
ND
2.67
0.53
ND
30.6
ND
1.89
13.2
8/11/2015
10:53 AM
684
1.18
1.23
278
0.06
ND
45.8
ND
0.17
2.87
328
ND
6.93
4.12
ND
1.92
0.78
2.72
0,69
0.27
36.8
0.03
2.55
13.7
8/11/2015
3:01 PM
158
0.27
1.01
251
ND
ND
45.3
ND
0.09
2.69
89.2
ND
6.65
ND
ND
1.85
ND
2.76
0.67
ND
36.6
ND
2.05
14.9
4953250
San Juan R @ Sand Island
8/12/2015
11:12 AM
623
1.08
1.41
205
0.05
ND
46.8
ND
0.15
3.44
310
ND
6.98
4.47
ND
1.93
ND
2.91
0.79
0.06
37.8
ND
2.61
14.5
8/12/2015
5:06 PM
605
1.78
1.43
260
0.06
ND
46.6
ND
0.16
2.98
314
ND
7.07
5.16
ND
1.81
0.91
2.79
0.78
0.15
33.5
ND
2.32
13.2
8/13/2015
11:28 AM
509
0.67
1.3
156
0.03
ND
53.6
ND
0.21
3.1
275
ND
8.21
8.9
ND
1.62
ND
2.96
0,68
ND
29.2
ND
3.65
20.4
8/14/2015
11:02 AM
ND
1.03
2.03
78.6
0.05
ND
53.2
ND
0.13
3.31
ND
ND
8.26
7.02
ND
5.31
2.38
3.27
1.08
0.19
49.5
0.13
5.88
4.87
8/15/2015
10:30 AM
95.2
1.12
1.84
83,5
0.04
ND
55.7
ND
0.09
2.27
ND
ND
8.4
ND
ND
3.93
0.82
3.46
1.06
0.28
46.7
0.05
3.45
ND
8/16/2015
11:06 AM
290
0.43
1.23
149
0.04
ND
55.8
ND
0.15
3.89
202
ND
10.2
3.94
ND
1.95
ND
2.91
0.71
0.04
36.3
ND
2.04
10.5
8/17/2015
3:33 PM
ND
0.41
1.48
87.1
ND
ND
62.4
ND
0.17
2.11
ND
ND
11.2
ND
ND
2.67
1.28
3.13
0.63
ND
30
ND
2.75
ND
These data are provisional and subject to change and are undergoing DWO's quality assurance and quality control procedures. Data are released in
the interest ofproviding timely data to the public. Neither DWO nor the State of Utah may be held liable for any damages resulting from its use.
-------
No Exceedence
lAbove Screening
Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Utah Domestic Source Criteria
(blank)
10
1,000
4
10
(blank)
50
(blank)
15
(blank)
2
(blank)
50
(blank)
Monitoring
Location
Site Description
Collection
Date
Collection Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
8/8/2015
5:40 PM
264
1.38
1.57
308
0.04
ND
49.2
ND
0.13
3.95
144
ND
5.75
2.81
ND
3.15
0.89
4.15
0.92
0.1
62.6
ND
3.13
14.2
8/10/2015
11:53 AM
325
0.38
1.94
299
ND
ND
44.6
ND
0.1
2.95
140
0.32
7.84
2.55
ND
2.43
ND
3.41
0.61
0.03
43.6
ND
7.59
17.6
8/10/2015
4:44 PM
149
1.26
1.4
265
ND
ND
44.2
ND
0.08
2.48
ND
0.32
7.87
ND
ND
2.63
ND
3.35
0.75
0.19
41.9
ND
6.67
18.5
8/11/2015
11:31 AM
907
1.42
1.98
391
0.05
ND
37.2
ND
0.18
3.13
382
ND
6.72
4.55
ND
2.46
0.85
3.29
0.78
0.21
51.3
0.04
7.82
12.4
8/11/2015
3:43 PM
1790
1.23
1.59
445
0.07
ND
43.6
ND
0.31
5.28
787
0.57
7.19
11.6
ND
1.98
1.02
3.11
0.82
0.23
41.4
0.03
4.55
17.4
4953000
San Juan R @ Mexican
8/12/2015
12:09 PM
125
1.41
1.59
245
0.03
ND
59.8
ND
0.05
3.34
ND
ND
7.86
ND
ND
2.27
ND
3.09
0.92
0.15
42.1
ND
3.07
14.2
Hat US163 Xing
8/12/2015
5:50 PM
105
2.23
1.79
185
0.09
ND
48.9
ND
0.07
3.19
ND
ND
7.22
ND
ND
2.64
ND
3.16
1.16
0.26
48.7
ND
4.34
16.1
8/13/2015
12:05 PM
293
1.61
2.06
201
ND
ND
42.6
ND
0.15
3.46
143
ND
7.21
3.54
ND
2.33
0.76
3.3
1.18
0.18
44.4
ND
7.13
19.8
8/14/2015
11:43 AM
120
1.04
2.33
157
0.04
ND
46.2
ND
0.24
5.86
ND
ND
10.5
2.43
ND
5.87
1.75
4.29
1.56
0.15
68
0.18
8.06
ND
8/15/2015
9:43 AM
135
1.04
1.7
117
0.03
ND
53.7
ND
0.58
8.56
ND
ND
9.03
7.42
ND
3.28
1.66
3.62
1.19
0.19
51.9
0.06
5.65
6.18
8/16/2015
11:58 AM
84.3
0.45
1.35
194
0.03
ND
57.7
ND
0.12
3.92
ND
ND
8.96
ND
ND
2.31
ND
3.5
0.84
0.03
40.2
ND
3.31
13.8
8/17/2015
3:04 PM
52.3
0.82
1.55
108
ND
ND
59.3
ND
0.13
2.85
ND
ND
10.3
ND
ND
2.55
1.23
3.42
0.86
0.19
37.3
0.04
3.4
ND
8/13/2015
2:42 PM
643
0.18
1.76
411
0.06
ND
52.3
ND
0.3
4.36
388
0.92
7.5
13.8
ND
2.16
1.09
3.09
0.91
ND
47
ND
4.99
19.2
8/14/2015
2:33 PM
38.5
0.32
1.89
121
ND
ND
51.1
ND
0.13
3.6
ND
ND
8.23
ND
ND
3.3
1.28
3.69
1.13
0.03
49.8
ND
5.38
ND
4952940
San Juan R @ Clay Hills
8/15/2015
2:30 PM
119
0.34
1.75
136
ND
ND
43.1
ND
0.08
2.6
ND
ND
8.99
ND
ND
4.27
0.95
3.62
1.18
ND
66.3
ND
5.48
ND
8/16/2015
2:46 PM
925
0.25
1.71
319
0.05
ND
52.7
ND
0.31
5.26
490
0.46
9.48
9.63
ND
2.78
0.84
4.17
0.91
ND
58.2
ND
5.71
20.6
8/17/2015
1:03 PM
101
0.26
1.63
132
ND
ND
53.2
ND
0.25
4.65
ND
ND
8.79
2.7
ND
2.55
1.36
3.89
0.73
ND
44.5
ND
4.83
ND
These data are provisional and subject to change
the interest of providing timely data to the public.
and are undergoing DWO's quality assurance and quality control procedures. Data are released in
Neither DWO nor the State of Utah may be held liable for any damages resulting fi'om its use.
-------
Comparison of San Juan River Raw Water Data with Screening Values for Agricultural Uses (Stock watering and Irrigation) - Dissolved
Metals
No Exceedence
lAbove Screenini
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Al uminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Sulfphate
Total Dissolved
Solids
Livestock Water
5,000
(blank)
200
(blank)
50
500
1,000
500
(blank)
100
250,000
(blank)
10
(blank)
50
(blank)
1,000,000
(blank)
100
25,000
(blank)
1,200
Irrigation Water Short-term NAS, 1972
5,000
(blank)
100
(blank)
10
(blank)
100
50
200
5000
(blank)
200
(blank)
10
200
(blank)
20
(blank)
100
2,000
(blank)
500,000
Irrigation Water Long-term NAS, 1972
20,000
(blank)
2,000
(blank)
50
(blank)
1,000
5,000
20,000
10,000
(blank)
10,000
(blank)
50
2,000
(blank)
20
(blank)
1000
10,000
(blank)
Utah DWQ Agricultural Use Criteria 4
100
(blank)
10
(blank)
100
(blank)
200
(blank)
100
(blank)
50
(blank)
1,200
Monitoring
Location
Site Description
Collection Date
Collection Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
mg/L
8/8/2015
1:23 PM
217
0.524
1.34
222
0.04
ND
51.5
ND
0.127
2.24
95.8
ND
7.85
2.94
ND
1.87
ND
2.96
0.72
ND
32.2
ND
4.86
15.3
111
460
8/9/2015
12:02 PM
258
0.341
0.63
274
ND
ND
50.6
ND
0.0817
2.48
119
ND
6.86
2.69
ND
2.01
ND
2.61
0.56
0.0257
28.5
ND
1.76
18.5
120
400
8/9/2015
3:05 PM
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
112
350
8/9/2015
6:00 PM
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
NS
99.1
410
8/9/2015
9:02 PM
329
0.347
0.95
341
0.04
ND
46
ND
0.139
3.47
198
0.274
6.3
4.14
ND
1.94
ND
2.38
0.54
ND
30
ND
2.07
15.4
97.3
430
8/10/2015
9:11 AM
172
0.458
0.99
233
ND
ND
44.6
ND
0.0673
3.21
103
0.391
6.01
1.64
ND
2.03
ND
2.51
0.58
ND
34.1
ND
1.74
19.7
99.7
380
San Juan R @ US 160 )$ng
in CO
8/10/2015
2:06 PM
1,050
0.711
1.3
220
0.09
ND
44.2
ND
0.407
3.35
732
1.04
6.02
12.8
ND
1.92
0.84
2.72
0.65
0.0586
35.1
ND
3.64
18
102
490
4954000
8/11/2015
8:50 AM
3,290
0.364
1.72
451
0.1
ND
39.8
ND
0.488
4.85
1520
1.1
5.05
19
0.015
1.65
1.19
3
0.97
ND
43.7
ND
3.9
19.1
100
380
8/11/2015
1:17 PM
720
0.0516
1.33
334
ND
ND
41.7
ND
0.155
3.03
366
0.27
5.11
5.1
ND
1.58
ND
2.91
0.76
ND
37
ND
2.46
14.9
99.2
290
8/12/2015
9:50 AM
104
0.586
0.88
178
ND
ND
52.1
ND
0.0614
2.39
ND
ND
7.2
ND
ND
1.47
ND
2.79
0.78
0.0252
30.3
ND
1.9
14.8
118
620
8/12/2015
2:04 PM
155
0.548
1.21
151
ND
ND
47.9
ND
0.0478
2.61
ND
ND
6.97
1.82
ND
1.48
ND
2.74
0.73
ND
27.3
ND
2.87
16.5
102
450
8/13/2015
10:01 AM
257
0.158
1.25
213
0.03
ND
48.3
ND
0.122
3.67
148
0.373
6.48
3.16
ND
1.89
ND
2.87
0.86
ND
42.5
ND
2.1
21.9
121
450
8/14/2015
2:33 PM
65
0.421
1.7
72.3
0.04
ND
53.4
ND
0.133
3.86
ND
ND
6.61
1.8
ND
3.65
3.14
3.66
1.1
ND
52.4
0.0385
4.11
ND
135
720
8/15/2015
12:04 PM
48
0.445
1.36
65.2
ND
ND
52.8
ND
0.052
1.35
ND
ND
7.91
ND
ND
2.25
ND
2.61
0.61
ND
25.9
ND
2.61
ND
106
580
8/16/2015
9:15 AM
54
1.12
0.88
179
0.04
ND
53.9
ND
ND
2.91
ND
ND
8.18
ND
ND
1.72
ND
2.54
0.6
0.186
26.1
ND
1.92
12.6
NS
980
8/8/2015
2:54 PM
136
0.747
1.06
223
0.04
ND
71.5
ND
0.13
2.72
ND
ND
9.92
ND
ND
2.62
0.8
3.84
1.11
0.0412
43.5
ND
2.54
21
195
610
8/10/2015
10:13AM
218
0.66
0.94
262
ND
ND
49.8
ND
0.0764
3.24
144
0.461
7.7
3.22
ND
2.03
ND
2.69
0.57
0.0529
32.1
ND
2.13
17.3
115
610
8/10/2015
2:58 PM
95
1.31
0.93
200
0.03
ND
48.6
ND
0.0595
2.48
ND
0.297
7.35
ND
ND
2.32
ND
2.59
0.61
0.251
31.8
ND
1.96
14.6
108
460
8/11/2015
9:44 AM
462
0.568
1.17
314
ND
ND
44.6
ND
0.127
2.66
227
ND
6.49
3.31
ND
1.72
ND
2.64
0.68
0.0307
37.1
ND
2.21
12.9
110
460
8/11/2015
2:20 PM
1,400
0.136
1.25
298
0.04
ND
44.8
ND
0.24
3.47
668
0.489
6.57
9.99
ND
1.72
0.95
2.96
0.74
ND
38.3
ND
2.73
14.3
110
620
4953990
San Juan R @ Town of
8/12/2015
10:37 AM
68
0.799
1.1
202
0.03
ND
48.3
ND
ND
2.49
ND
ND
7.23
ND
ND
1.66
ND
2.67
0.8
0.0397
31.9
ND
1.68
13.5
114
560
Montezuma
8/12/2015
2:57 PM
375
0.822
0.91
176
ND
ND
48.9
ND
0.0898
4.34
296
ND
7.5
2.28
ND
1.64
ND
2.84
0.72
0.0343
33.8
ND
1.99
15.9
123
460
8/13/2015
4:46 PM
330
1.88
1.28
240
0.07
ND
49.4
ND
0.18
3.75
192
ND
8.08
5.3
ND
1.91
0.98
2.62
0.98
0.235
32.9
0.025
3.12
32.7
125
370
8/14/2015
9:55 AM
25
0.582
1.27
85.1
0.04
ND
55.1
ND
0.146
3.79
ND
ND
7.81
ND
ND
2.84
1.76
3.51
0.99
0.0355
53
0.0272
3.07
ND
154
480
8/15/2015
11:31 AM
68
0.642
1.58
73.6
0.04
ND
55
ND
0.244
4.38
ND
ND
8.57
3.36
ND
2.43
1.09
3.16
0.89
0.0705
35.8
ND
3.54
ND
139
440
8/16/2015
10:02 AM
62
0.835
1.17
145
0.06
ND
57.5
ND
0.092
3.01
ND
ND
9.36
ND
ND
1.99
ND
2.96
0.67
0.283
30.3
0.0527
2.16
9.78
NS
1,170
8/17/2015
4:07 PM
27
0.285
1.17
80.4
ND
ND
60.2
ND
0.137
1.87
ND
ND
11.6
2.4
ND
1.97
ND
2.82
0.63
ND
29.4
ND
2.18
ND
NS
790
8/8/2015
4:19 PM
214
1.38
1.03
294
0.06
ND
73.7
ND
0.124
3.86
104
ND
9.24
2.55
ND
3.3
1.01
4.11
1.43
0.123
51.2
ND
2.22
19
226
640
8/10/2015
11:15AM
124
1.24
0.88
192
ND
ND
53.2
ND
0.0685
2.07
ND
0.287
8.4
ND
ND
2.38
ND
2.86
0.69
0.252
28.4
ND
1.75
13.7
124
370
8/10/2015
3:58 PM
108
0.574
1.07
184
ND
ND
48.4
ND
0.0556
1.96
ND
0.315
7.83
ND
ND
2.26
ND
2.67
0.53
ND
30.6
ND
1.89
13.2
118
490
8/11/2015
10:53 AM
684
1.18
1.23
278
0.06
ND
45.8
ND
0.172
2.87
328
ND
6.93
4.12
ND
1.92
0.78
2.72
0.69
0.269
36.8
0.031
2.55
13.7
114
390
8/11/2015
3:01 PM
158
0.271
1.01
251
ND
ND
45.3
ND
0.0864
2.69
89.2
ND
6.65
ND
ND
1.85
ND
2.76
0.67
ND
36.6
ND
2.05
14.9
112
360
4953250
San Juan R @ Sand Island
8/12/2015
11:12AM
623
1.08
1.41
205
0.05
ND
46.8
ND
0.154
3.44
310
ND
6.98
4.47
ND
1.93
ND
2.91
0.79
0.0594
37.8
ND
2.61
14.5
112
450
8/12/2015
5:06 PM
605
1.78
1.43
260
0.06
ND
46.6
ND
0.162
2.98
314
ND
7.07
5.16
ND
1.81
0.91
2.79
0.78
0.152
33.5
ND
2.32
13.2
109
410
8/13/2015
11:28 AM
509
0.667
1.3
156
0.03
ND
53.6
ND
0.21
3.1
275
ND
8.21
8.9
ND
1.62
ND
2.96
0.68
ND
29.2
ND
3.65
20.4
121
450
8/14/2015
11:02AM
ND
1.03
2.03
78.6
0.05
ND
53.2
ND
0.131
3.31
ND
ND
8.26
7.02
ND
5.31
2.38
3.27
1.08
0.193
49.5
0.129
5.88
4.87
146
630
8/15/2015
10:30 AM
95
1.12
1.84
83.5
0.04
ND
55.7
ND
0.085
2.27
ND
ND
8.4
ND
ND
3.93
0.82
3.46
1.06
0.276
46.7
0.0523
3.45
ND
164
540
8/16/2015
11:06 AM
290
0.425
1.23
149
0.04
ND
55.8
ND
0.146
3.89
202
ND
10.2
3.94
ND
1.95
ND
2.91
0.71
0.0426
36.3
ND
2.04
10.5
NS
1,020
8/17/2015
3:33 PM
ND
0.408
1.48
87.1
ND
ND
62.4
ND
0.172
2.11
ND
ND
11.2
ND
ND
2.67
1.28
3.13
0.63
ND
30
ND
2.75
ND
NS
930
These data are provisional and subject to change and are undergoing DWO's quality assurance and quality control procedures. Data are released in
the interest ofproviding timely data to the public. Neither DWO nor the State of Utah may be held liable for any damages resulting from its use.
-------
No Exceedence
lAbove Screenins
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Alum inum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Sulfphate
Total Dissolved
Solids
Livestock Water
5,000
(blank)
200
(blank)
50
500
1,000
500
(blank)
100
250,000
(blank)
10
(blank)
50
(blank)
1,000,000
(blank)
100
25,000
(blank)
1,200
1 rrigation Water Short-term NAS, 1972
5,000
(blank)
100
(blank)
10
(blank)
100
50
200
5000
(blank)
200
(blank)
10
200
(blank)
20
(blank)
100
2,000
(blank)
500,000
Irrigation Water Long-term NAS, 1972
20,000
(blank)
2,000
(blank)
50
(blank)
1,000
5,000
20,000
10,000
(blank)
10,000
(blank)
50
2,000
(blank)
20
(blank)
1000
10,000
(blank)
Utah DWQ Agricultural Use Criteria 4
100
(blank)
10
(blank)
100
(blank)
200
(blank)
100
(blank)
50
(blank)
1,200
Monitoring
Location
Site Description
Collection Date
Collection Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
mg/L
8/8/2015
5:40 PM
264
1.38
1.57
308
0.04
ND
49.2
ND
0.127
3.95
144
ND
5.75
2.81
ND
3.15
0.89
4.15
0.92
0.0956
62.6
ND
3.13
14.2
154
730
8/10/2015
11:53 AM
325
0.376
1.94
299
ND
ND
44.6
ND
0.102
2.95
140
0.315
7.84
2.55
ND
2.43
ND
3.41
0.61
0.0297
43.6
ND
7.59
17.6
126
590
8/10/2015
4:44 PM
149
1.26
1.4
265
ND
ND
44.2
ND
0.0789
2.48
ND
0.315
7.87
ND
ND
2.63
ND
3.35
0.75
0.193
41.9
ND
6.67
18.5
132
660
8/11/2015
11:31 AM
907
1.42
1.98
391
0.05
ND
37.2
ND
0.179
3.13
382
ND
6.72
4.55
ND
2.46
0.85
3.29
0.78
0.205
51.3
0.0362
7.82
12.4
117
980
8/11/2015
3:43 PM
1,790
1.23
1.59
445
0.07
ND
43.6
ND
0.311
5.28
787
0.569
7.19
11.6
ND
1.98
1.02
3.11
0.82
0.23
41.4
0.027
4.55
17.4
129
600
4953000
San Juan R @ Mexican Hat
8/12/2015
12:09 PM
125
1.41
1.59
245
0.03
ND
59.8
ND
0.0512
3.34
ND
ND
7.86
ND
ND
2.27
ND
3.09
0.92
0.151
42.1
ND
3.07
14.2
157
450
US 163 Xing
8/12/2015
5:50 PM
105
2.23
1.79
185
0.09
ND
48.9
ND
0.0691
3.19
ND
ND
7.22
ND
ND
2.64
ND
3.16
1.16
0.264
48.7
ND
4.34
16.1
143
470
8/13/2015
12:05 PM
293
1.61
2.06
201
ND
ND
42.6
ND
0.148
3.46
143
ND
7.21
3.54
ND
2.33
0.76
3.3
1.18
0.182
44.4
ND
7.13
19.8
135
490
8/14/2015
11:43 AM
120
1.04
2.33
157
0.04
ND
46.2
ND
0.236
5.86
ND
ND
10.5
2.43
ND
5.87
1.75
4.29
1.56
0.152
68
0.182
8.06
ND
173
760
8/15/2015
9:43 AM
135
1.04
1.7
117
0.03
ND
53.7
ND
0.575
8.56
ND
ND
9.03
7.42
ND
3.28
1.66
3.62
1.19
0.192
51.9
0.0557
5.65
6.18
191
710
8/16/2015
11:58 AM
84
0.447
1.35
194
0.03
ND
57.7
ND
0.12
3.92
ND
ND
8.96
ND
ND
2.31
ND
3.5
0.84
0.0298
40.2
ND
3.31
13.8
NS
1,380
8/17/2015
3:04 PM
52
0.817
1.55
108
ND
ND
59.3
ND
0.128
2.85
ND
ND
10.3
ND
ND
2.55
1.23
3.42
0.86
0.186
37.3
0.0425
3.4
ND
NS
880
8/13/2015
2:42 PM
643
0.18
1.76
411
0.06
ND
52.3
ND
0.3
4.36
388
0.924
7.5
13.8
ND
2.16
1.09
3.09
0.91
ND
47
ND
4.99
19.2
158
500
8/14/2015
2:33 PM
39
0.316
1.89
121
ND
ND
51.1
ND
0.125
3.6
ND
ND
8.23
ND
ND
3.3
1.28
3.69
1.13
0.0286
49.8
ND
5.38
ND
144
570
4952940
San Juan R @ Clay Hills
8/15/2015
2:30 PM
119
0.343
1.75
136
ND
ND
43.1
ND
0.0773
2.6
ND
ND
8.99
ND
ND
4.27
0.95
3.62
1.18
ND
66.3
ND
5.48
ND
159
920
8/16/2015
2:46 PM
925
0.25
1.71
319
0.05
ND
52.7
ND
0.314
5.26
490
0.458
9.48
9.63
ND
2.78
0.84
4.17
0.91
ND
58.2
ND
5.71
20.6
NS
1,480
8/17/2015
1:03 PM
101
0.263
1.63
132
ND
ND
53.2
ND
0.253
4.65
ND
ND
8.79
2.7
ND
2.55
1.36
3.89
0.73
ND
44.5
ND
4.83
ND
NS
1,020
These data are provisional and subject to change
the interest of providing timely data to the public.
and are undergoing DWO's quality assurance and quality control procedures. Data are released in
Neither DWO nor the State of Utah may be held liable for any damages resulting fi'om its use.
-------
Comparison of San Juan River Raw Water Data with Screening Values for Aquatic Life Use (Warm-water Fishery) - Dissolved Metals
No Exceedence
|Above Screening Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Utah Aquatic Life Use Criteria 1-hr
750
(blank)
340
(blank)
2
(blank)
570
(blank)
13
1,000
65
(blank)
468
(blank)
18.4
1.6
(blank)
120
Utah Aquatic Life Use Criteria 4-day
87
(blank)
150
(blank)
0.25
(blank)
74
(blank)
9
1,000
2.5
(blank)
0.01
(blank)
52
(blank)
4.6
(blank)
120
Monitoring
Location
Site Description
Collection
Date
Collection
Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
8/8/2015
1:23 PM
217
1
1
222
0.04
ND
52
ND
0.13
2.2
96
ND
8
3
ND
1.87
ND
3
0.7
ND
32
ND
5
15
8/9/2015
12:02 PM
258
0
1
274
ND
ND
51
ND
0.08
2.5
119
ND
7
3
ND
2.01
ND
3
0.6
0
29
ND
2
19
8/9/2015
9:02 PM
329
0
1
341
0.04
ND
46
ND
0.14
3.5
198
0
6
4
ND
1.94
ND
2
0.5
ND
30
ND
2
15
8/10/2015
9:11 AM
172
0
1
233
ND
ND
45
ND
0.07
3.2
103
0
6
2
ND
2.03
ND
3
0.6
ND
34
ND
2
20
8/10/2015
2:06 PM
1,050
1
1
220
0.09
ND
44
ND
0.41
3.4
732
1
6
13
ND
1.92
1
3
0.6
0
35
ND
4
18
San Juan R @ US160 Xing in
CO
8/11/2015
8:50 AM
3,290
0
2
451
0.10
ND
40
ND
0.49
4.9
1,520
1
5
19
0.02
1.65
1
3
1.0
ND
44
ND
4
19
4954000
8/11/2015
1:17 PM
720
0
1
334
ND
ND
42
ND
0.16
3.0
366
0
5
5
ND
1.58
ND
3
0.8
ND
37
ND
2
15
8/12/2015
9:50 AM
104
1
1
178
ND
ND
52
ND
0.06
2.4
ND
ND
7
ND
ND
1.47
ND
3
0.8
0
30
ND
2
15
8/12/2015
2:04 PM
155
1
1
151
ND
ND
48
ND
0.05
2.6
ND
ND
7
2
ND
1.48
ND
3
0.7
ND
27
ND
3
17
8/13/2015
10:01 AM
257
0
1
213
0.03
ND
48
ND
0.12
3.7
148
0
6
3
ND
1.89
ND
3
0.9
ND
43
ND
2
22
8/14/2015
2:33 PM
65
0
2
72
0.04
ND
53
ND
0.13
3.9
ND
ND
7
2
ND
3.65
3
4
1.1
ND
52
0.04
4
ND
8/15/2015
12:04 PM
48
0
1
65
ND
ND
53
ND
0.05
1.4
ND
ND
8
ND
ND
2.25
ND
3
0.6
ND
26
ND
3
ND
8/16/2015
9:15 AM
54
1
1
179
0.04
ND
54
ND
ND
2.9
ND
ND
8
ND
ND
1.72
ND
3
0.6
0
26
ND
2
13
8/8/2015
2:54 PM
136
1
1
223
0.04
ND
72
ND
0.13
2.7
ND
ND
10
ND
ND
2.62
1
4
1.1
0
44
ND
3
21
8/10/2015
10:13 AM
218
1
1
262
ND
ND
50
ND
0.08
3.2
144
0
8
3
ND
2.03
ND
3
0.6
0
32
ND
2
17
8/10/2015
2:58 PM
95
1
1
200
0.03
ND
49
ND
0.06
2.5
ND
0
7
ND
ND
2.32
ND
3
0.6
0
32
ND
2
15
8/11/2015
9:44 AM
462
1
1
314
ND
ND
45
ND
0.13
2.7
227
ND
6
3
ND
1.72
ND
3
0.7
0
37
ND
2
13
8/11/2015
2:20 PM
1,400
0
1
298
0.04
ND
45
ND
0.24
3.5
668
0
7
10
ND
1.72
1
3
0.7
ND
38
ND
3
14
4953990
San Juan R @ Town of
8/12/2015
10:37 AM
68
1
1
202
0.03
ND
48
ND
ND
2.5
ND
ND
7
ND
ND
1.66
ND
3
0.8
0
32
ND
2
14
Montezuma
8/12/2015
2:57 PM
375
1
1
176
ND
ND
49
ND
0.09
4.3
296
ND
8
2
ND
1.64
ND
3
0.7
0
34
ND
2
16
8/13/2015
4:46 PM
330
2
1
240
0.07
ND
49
ND
0.18
3.8
192
ND
8
5
ND
1.91
1
3
1.0
0
33
0.03
3
33
8/14/2015
9:55 AM
25
1
1
85
0.04
ND
55
ND
0.15
3.8
ND
ND
8
ND
ND
2.84
2
4
1.0
0
53
0.03
3
ND
8/15/2015
11:31 AM
68
1
2
74
0.04
ND
55
ND
0.24
4.4
ND
ND
9
3
ND
2.43
1
3
0.9
0
36
ND
4
ND
8/16/2015
10:02 AM
62
1
1
145
0.06
ND
58
ND
0.09
3.0
ND
ND
9
ND
ND
1.99
ND
3
0.7
0
30
0.05
2
10
8/17/2015
4:07 PM
27
0
1
80
ND
ND
60
ND
0.14
1.9
ND
ND
12
2
ND
1.97
ND
3
0.6
ND
29
ND
2
ND
8/8/2015
4:19 PM
214
1
1
294
0.06
ND
74
ND
0.12
3.9
104
ND
9
3
ND
3.30
1
4
1.4
0
51
ND
2
19
8/10/2015
11:15 AM
124
1
1
192
ND
ND
53
ND
0.07
2.1
ND
0
8
ND
ND
2.38
ND
3
0.7
0
28
ND
2
14
8/10/2015
3:58 PM
108
1
1
184
ND
ND
48
ND
0.06
2.0
ND
0
8
ND
ND
2.26
ND
3
0.5
ND
31
ND
2
13
8/11/2015
10:53 AM
684
1
1
278
0.06
ND
46
ND
0.17
2.9
328
ND
7
4
ND
1.92
1
3
0.7
0
37
0.03
3
14
8/11/2015
3:01 PM
158
0
1
251
ND
ND
45
ND
0.09
2.7
89
ND
7
ND
ND
1.85
ND
3
0.7
ND
37
ND
2
15
4953250
San Juan R @ Sand Island
8/12/2015
11:12 AM
623
1
1
205
0.05
ND
47
ND
0.15
3.4
310
ND
7
4
ND
1.93
ND
3
0.8
0
38
ND
3
15
8/12/2015
5:06 PM
605
2
1
260
0.06
ND
47
ND
0.16
3.0
314
ND
7
5
ND
1.81
1
3
0.8
0
34
ND
2
13
8/13/2015
11:28 AM
509
1
1
156
0.03
ND
54
ND
0.21
3.1
275
ND
8
9
ND
1.62
ND
3
0.7
ND
29
ND
4
20
8/14/2015
11:02 AM
ND
1
2
79
0.05
ND
53
ND
0.13
3.3
ND
ND
8
7
ND
5.31
2
3
1.1
0
50
0.13
6
5
8/15/2015
10:30 AM
95
1
2
84
0.04
ND
56
ND
0.09
2.3
ND
ND
8
ND
ND
3.93
1
3
1.1
0
47
0.05
3
ND
8/16/2015
11:06 AM
290
0
1
149
0.04
ND
56
ND
0.15
3.9
202
ND
10
4
ND
1.95
ND
3
0.7
0
36
ND
2
11
8/17/2015
3:33 PM
ND
0
1
87
ND
ND
62
ND
0.17
2.1
ND
ND
11
ND
ND
2.67
1
3
0.6
ND
30
ND
3
ND
These data are provisional and subject to change and are undergoing DWO's quality assurance and quality control procedures. Data are released in
the interest ofproviding timely data to the public. Neither DWO nor the State of Utah may be held liable for any damages resulting from its use.
-------
No Exceedence
|Above Screening Level
Prior to Plume Arrival
Estimated Plume Arrival
Post Plume Arrival
Aluminum
Antimony
Arsenic
Barium
Beryllium
Cadmium
Calcium
Chromium
Cobalt
Copper
Iron
Lead
Magnesium
Manganese
Mercury
Molyebdenum
Nickel
Potassium
Selenium
Silver
Sodium
Thallium
Vanadium
Zinc
Utah Aquatic Life Use Criteria 1-hr
750
(blank)
340
(blank)
2
(blank)
570
(blank)
13
1,000
65
(blank)
468
(blank)
18.4
1.6
(blank)
120
Utah Aquatic Life Use Criteria 4-day
87
(blank)
150
(blank)
0.25
(blank)
74
(blank)
9
1,000
2.5
(blank)
0.01
(blank)
52
(blank)
4.6
(blank)
120
Monitoring
Location
Site Description
Collection
Date
Collection
Time
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
mg/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
ug/L
8/8/2015
5:40 PM
264
1
2
308
0.04
ND
49
ND
0.13
4.0
144
ND
6
3
ND
3.15
1
4
0.9
0
63
ND
3
14
8/10/2015
11:53 AM
325
0
2
299
ND
ND
45
ND
0.10
3.0
140
0
8
3
ND
2.43
ND
3
0.6
0
44
ND
8
18
8/10/2015
4:44 PM
149
1
1
265
ND
ND
44
ND
0.08
2.5
ND
0
8
ND
ND
2.63
ND
3
0.8
0
42
ND
7
19
8/11/2015
11:31 AM
907
1
2
391
0.05
ND
37
ND
0.18
3.1
382
ND
7
5
ND
2.46
1
3
0.8
0
51
0.04
8
12
8/11/2015
3:43 PM
1,790
1
2
445
0.07
ND
44
ND
0.31
5.3
787
1
7
12
ND
1.98
1
3
0.8
0
41
0.03
5
17
4953000
San Juan R @ Mexican Hat
8/12/2015
12:09 PM
125
1
2
245
0.03
ND
60
ND
0.05
3.3
ND
ND
8
ND
ND
2.27
ND
3
0.9
0
42
ND
3
14
US163 Xing
8/12/2015
5:50 PM
105
2
2
185
0.09
ND
49
ND
0.07
3.2
ND
ND
7
ND
ND
2.64
ND
3
1.2
0
49
ND
4
16
8/13/2015
12:05 PM
293
2
2
201
ND
ND
43
ND
0.15
3.5
143
ND
7
4
ND
2.33
1
3
1.2
0
44
ND
7
20
8/14/2015
11:43 AM
120
1
2
157
0.04
ND
46
ND
0.24
5.9
ND
ND
11
2
ND
5.87
2
4
1.6
0
68
0.18
8
ND
8/15/2015
9:43 AM
135
1
2
117
0.03
ND
54
ND
0.58
8.6
ND
ND
9
7
ND
3.28
2
4
1.2
0
52
0.06
6
6
8/16/2015
11:58 AM
84
0
1
194
0.03
ND
58
ND
0.12
3.9
ND
ND
9
ND
ND
2.31
ND
4
0.8
0
40
ND
3
14
8/17/2015
3:04 PM
52
1
2
108
ND
ND
59
ND
0.13
2.9
ND
ND
10
ND
ND
2.55
1
3
0.9
0
37
0.04
3
ND
8/13/2015
2:42 PM
643
0
2
411
0.06
ND
52
ND
0.30
4.4
388
1
8
14
ND
2.16
1
3
0.9
ND
47
ND
5
19
8/14/2015
2:33 PM
39
0
2
121
ND
ND
51
ND
0.13
3.6
ND
ND
8
ND
ND
3.30
1
4
1.1
0
50
ND
5
ND
4952940
San Juan R @ Clay Hills
8/15/2015
2:30 PM
119
0
2
136
ND
ND
43
ND
0.08
2.6
ND
ND
9
ND
ND
4.27
1
4
1.2
ND
66
ND
5
ND
8/16/2015
2:46 PM
925
0
2
319
0.05
ND
53
ND
0.31
5.3
490
0
9
10
ND
2.78
1
4
0.9
ND
58
ND
6
21
8/17/2015
1:03 PM
101
0
2
132
ND
ND
53
ND
0.25
4.7
ND
ND
9
3
ND
2.55
1
4
0.7
ND
45
ND
5
ND
These data are provisional and subject to change
the interest of providing timely data to the public.
and are undergoing DWO's quality assurance and quality control procedures. Data are released in
Neither DWO nor the State of Utah may be held liable for any damages resulting fi'om its use.
------- |