SMC Martin Inc.
INVENTORY OF CLASS V
INJECTION WELLS IN THE
STATE OF COLORADO
A Subsidiary of Science Management Corporation

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INVENTORY OF CLASS V
INJECTION WELLS IN THE
STATE OF COLORADO
Submitted to:
U.S. Environmental Protection
Agency
Region VIII
Groundwater Protection Section
1860 Lincoln Street
Denver, CO 80295
Submitted by:
SMC MARTIN INC.
900 W. Valley Forge Road
P. 0. Box 859
Valley Forge, PA 19482
Contract No. 68-01-6288
Task #24 Amendment #(b)
Ref: #8425-040-94002
March 1985

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TABLE OF CONTENTS
Page
Executive Summary	1
Introduction	3
Methodology	6
Colorado Geology and Hydrology	9
Results of the Class V Injection Well Inventory	14
Description and Assessment of Types of Class V
Injection Wells
Wells used for return flow of water used in
heat exchange processes	18
Wells used for waste disposal	19
Wells used for aquifer recharge	20
Rocky Mountain Arsenal
Chemigation in San Luis Valley and High Plains
Aquifer recharge in San Luis Valley
Wells used for in situ oil shale recovery	25
Experimental wells for nacholite extraction	30
Wells used for surface drainage	31
Maintaining an updated Class V Inventory	32
Conclusions	35
References
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Final Inventory Telephone Contacts
Inventory Forms, Final Inventory
Data Sheets from Initial Howard Inventory
Status of Each Inventoried Well: Initial,
Revised, and Final Inventories
Review of Chemigation in Colorado
Review of Nacholite Extraction Technology

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LIST OF TABLES
Tables	Page
1	Summary of Examples of Class V Well Types	4
2	Mass Mailings (Howard Inventory)	7
3	Summary of Well Inventory Results by Well
Type and Location	15
4	Summary of Class V Injection Wells In Colorado 16

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LIST OF FIGURES
Figure	Page
1	Physiography of Colorado	10
2	Ground-Water Regions of Colorado	11
3	Oil Shale Recovery Projects in the
Piceance Basin	26
4	Retorts and Injection Wells for Oil
Shale Extraction	28
5	Well Permit Application Form for the
State of Colorado	33

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EXECUTIVE SUMMARY
A preliminary inventory of Class V injection wells in the
State of Colorado, done by Dr. E. A. Howard of the Colorado
School of Mines, has been reviewed, evaluated, and revised in
accordance with EPA Contract #68-01-6288. A total of 115 wells
are verified in Colorado. Of these, 81 are aquifer recharge
wells used in ground-water clean-up projects on the grounds of
the Rocky Mountain Arsenal. Twenty-five wells are in the
Piceance Basin with 2 3 related to oil shale extraction projects
and two used for nacholite extraction. The remaining nine wells
are widely distributed geographically and with respect to
usage. This group includes: two geothermal wells, two heat
pump wells, one cooling water return flow well, two mine
backfill wells, and two surface runoff drainage wells.
This well inventory is estimated to be 95 percent complete
within the practical limits of verifiability inherent to the
methodology utilized in this study. A potential problem area,
with respect to this inventory, exists with injection wells
related to irrigation in the San Luis Valley. Though no
injection wells could be verified in this region, there is a
strong suggestion that aquifer recharge wells may be present.
Unintended injection due to backflow through center-pivot
irrigation systems may occur in the San Luis Valley as well as
in the High Plains.
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Class V injection wells do not appear to be creating any
widespread environmental impact in the State of Colorado, except
possibly for the unverifiable wells in the San Luis Yalley and
High Plains. The environmental impact of the wells iat the Rocky
Mountain Arsenal and in the Piceance Basin is best viewed in
context of the large-scale operations of which the wells are a
part. The potential environmental impacts of the nine remaining
wells are limited by their scarcity and widespread distribution
throughout the state.
A current inventory can most effectively be maintained if
the State of Colorado Division of Water Resources alters its
drilling permit form (WRJ-5-Rev. 76) to categorize wells as
"injection" or "extraction" wells. Permit files could then be
periodically monitored to keep the inventory current. The
Colorado State government is presently revamping its legislation
concerning ground water (and by association, injection wells).
State officials involved in developing new ground-water
regulations should provide a means in the legislation of
maintaining this inventory.
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INTRODUCTION
According to the regulations of the Underground Injection
Control (UIC) program, an injection well is a drilled, driven,
or dug hole whose depth is greater than the largest surface
dimension and which is used for the subsurface emplacement of
fluids. These wells are used for a variety of purposes
including aquifer recharge, surface drainage, the production of
oil, gas, and minerals, sanitary waste disposal, and hazardous
waste disposal. Due to misuse and/or improper design, construc-
tion, operation, or abandonment, injection wells may be a
significant threat to ground-water drinking sources. The aim of
the UIC program is to prevent or diminish deterioration of the
quality of potential underground sources of drinking water
(USDW).
Class V injection wells are defined by the U.S. Environ-
mental Protection Agency (EPA) for the purposes of the UIC
program as: "Injection wells not included in Class I, II, III,
or IV" (40 CFR 146.05(e) as amended February 3, 1982). At least
17 examples of injection wells can be included in Class V, but
only 9 of these types have been found in the State of Colorado
(Table 1).
Though Class V wells are reported to account for more than
61 percent of the total number of injection wells in this
country, at present there is little information on the extent,
operation, and impact of Class V wells. This lack of
3

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TABLE 1
Summary of Examples of Class V Well Types
Well Type	Found in
(Howard,	Colorado
1984) Description of Well	(Y/N)
1	Return flow for water used in heat
pumps and air conditioners	Y
2	Cesspools (serving <20 people/day)	N
3	Return flow for cooling water	Y
4	Drainage of surface fluids	Y
5	Dry wells for waste injection	N
6	Aquifer recharge	Y
7	Salt water intrusion barrier wells	N
8	Mine backfill	Y
9	Septic system waste injection
10	Subsidence control	N
11	Radioactive waste disposal	N
12	Geothermal energy recovery related	Y
13	Solution mining	N
14	Halogen extraction	N
15	Experimental technologies
16	In Situ recovery of petrochemical
resources	Y
17*	Municipal and Industrial wells
other than Class I	N
* Not included as part of inventory.
4

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information has prevented development of a suitable regulatory
approach. Proper regulation therefore requires an inventory of
such wells in each state.
This report provides an updated and verified inventory of
Class V injection wells based on the preliminary inventory
conducted by Dr. E. A. Howard of the Colorado School of Mines
(1984) . The EPA contracted SMC Martin to complete the inventory
of Class V injection wells in Colorado as part of EPA
Contract #68-01-6288. This inventory verification and
assessment process was divided into two tasks. In Task 1, the
completeness of the preliminary Howard inventory was assessed
and a methodology to complete and update it was developed.
Task 2 consisted of implementation of the recommendations made
in Task 1, summarizing the revised inventory, describing each
type of inventoried well and assessing the environmental impact
of the well types.
In practice, Task 1 and Task 2 were, in large part, carried
out concurrently. Task 1 and Task 2 results have been
integrated in this report, just as the tasks were completed in
an integrated manner. This report also assesses the potential
environmental impacts of each well type in Colorado. To
facilitate an understanding of the findings of this study, a
brief background of the physical (geology, geography, hydrology)
and regulatory framework for injection wells in the State of
Colorado is also presented.
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METHODOLOGY
The preliminary inventory of Class V injection wells in
Colorado prepared by Dr. E. A. Howard, of the Colorado School of
Mines (1984), was used as the starting point for this study.
Dr. Howard's inventory methodology consisted of three stages:
1)	contacts were made with governmental and private sector
sources of general information on Class V injection wells;
2)	mass mailings were made to individuals and organizations
presumed to be knowledgeable about specific types of Class V
wells, and 3) telephone contacts were made with specific
individuals and organizations determined to have information on
individual well, well types, or well facilities in Colorado.
The mass mailings conducted by Dr. Howard received generally low
response (Table 2). The low percentage of responses to the
mailings is perhaps a function of the overall low utilization of
Class V injection wells in Colorado as confirmed by telephone
contacts. In other words, if contactees had no knowledge of
wells, they usually did not respond to the mailings.
SMC Martin has found that the most effective means of
gathering information for this type of inventory is via phone
contacts with organizations and individuals in both the public
and private sector from whom it is felt relevant information can
be obtained. For this inventory, lists of names and phone
numbers were initially compiled from phone books, directory
assistance, and Dr. Howard's preliminary report. These
6

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TABLE 2
MASS MAILINGS (Howard, 1984)
Number of
Questionnaires Number'of	%
Groups Contacted Sent	Respondents	Response
HVAC Suppliers 49	7	14
Well Drillers 300	39	13
Consulting Engineers 113	8	7
Water Conservancy and
Related Management Districts 88	20	23
Machine Shops, Plating Companies 80	7	9
Mining Companies 127	19	15
Also sent to permit applicants where appropriate.
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individuals were often able to suggest other contacts, and the
list of potential contacts expanded.
Over 2 00 phone calls were made in the course of this study,
c-
of which many were useful sources of information (Appendix A).
Though time-intensive, this method of data collection was
successful in validating the preliminary survey. Included in
the initial round of phone calls were various state agencies in
Colorado within the Board of Health and the Department of
Natural Resources. Other public sector groups contacted include
those at the federal level and a variety of local levels.
Appendix A summarizes these contacts.
Phone calls to relevant private sector individuals and
organizations were made after the initial round of government
calls. These, too, are summarized in Appendix A. Contacts were
chosen from all areas of the state, where possible, to ensure
that the different geographic/agricultural/industrial regions
were adequately researched. In addition to the general survey
of public and private sector contacts, phone calls were also
made to the legal contacts for all inventoried wells in order to
verify the inventory information.
Research was also carried out on relevant aspects of
Colorado geology and water law as well as specific processes,
such as oil shale extraction techniques, that might involve
Class V injection wells. This background provides a context in
which to consider the types and distribution of Class V
injection wells in Colorado.
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COLORADO GEOLOGY AND HYDROLOGY
Colorado is often considered a mountain state, but almost
forty percent of its area is part of the Great Plains and
another approximately twenty percent is in major valley and
plateau regions (Figure 1). Elevations in Colorado range from
about 3,300 feet in the eastern high plains to over 14,400 feet
in the Rocky Mountains.
Precipitation is generally low in Colorado and much is
stored through the winter as snowpack to be released over a
short period of time in the spring. Four major river systems
receive the water shed by the mountains. These are the South
Platte, Arkansas, Rio Grande, and Colorado Rivers (Figure 2).
Colorado can be broadly divided into five major ground-water
regions (Figure 2). These regions are: High Plains,
Unglaciated Central Region, Central Mountains, San Luis
(Alluvial) Valley, and Colorado Plateau. Comparisons of
Figures 1 and 2 will illustrate the close relationship between
the physiographic and ground-water regions of Colorado.
The Central Mountain Region (e.g., Rocky Mountains) of
Colorado is characterized by steep slopes, exposed rock
surfaces, and, hydrologically, by relatively limited aquifers.
The Central Mountains principally trap precipitation as winter
snowpack and shed water as spring runoff, thereby supplying the
major river systems listed above.
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Mountain and Plateau Regions
Figure 1. Physiography of Colorado
Source: Weimer, R. J. and J. D. Huan, eds., 1960
Guide to the Geology of Colorado
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LEGEND
(JnQlaciated Central Region
N
I I I I I I
• ••••'
•	• • • i
• • • •
•	• • • i
********
San Luis Valley
High Plains
^ » • 4
t
• » «
Colorado Plateau
Central Mountains
Figure 2. Ground-Water Regions of Colorado
Source: Johnson Div. UOP Inc., 1975,
Groundwater and wells
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The Colorado Plateau, the physiographic and ground-water
region in the western part of the state, is a generally high
dissected plateau with limited productive aquifers. Since
population in this region is sparse, water demands are generally
quite low.
Eastern Colorado consists of the Unglaciated Central
Ground-Water Region and the High Plains Ground-Water Region.
This area of the state is characterized by relatively arid
conditions but include some very productive ground-water
resources (e.g., Ogallala aquifer). Irrigation, including
chemigation, is intensive in this region and aquifer recharge,
though not by injection, is commonly practiced, especially along
the South Platte River.
A final important physiographic/ground-water region is the
San Luis Valley, a generally closed alluvial basin with
significant ground-water resources and intensively practiced
agricultural irrigation and aquifer recharge. The San Luis
Valley and High Plains present special 'problem areas1 with
regard to injection wells. Because of the intensive agricul-
tural irrigation in these regions, aquifer recharge and
irrigation backflow types of well injection are probable. This
subject will be discussed later in more detail.
The physical framework of the State of Colorado plays an
important role in the nature of the state's Class V well
population. Mountainous regions are characterized by steep
slope gradients and exposed rock surfaces which promote surface
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runoff to natural drainage systems. Drilling for wells in the
mountains is more expensive than in the plains and valleys, thus
discouraging well installation where other techniques of water
discharge are available. In the basins and plains of Colorado,
infiltration is rapid in part due to the semi-arid climate and
generally sparse vegetative cover.
The geologic and hydrologic frameworks of Colorado are
generally not conducive to the utilization of injection wells.
Surface discharge is predominantly preferred over injection due
to the rapid infiltration of surface water, the convenient
surface drainage because of steep slope gradients, and the added
cost of well construction in Colorado.
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INVENTORY FINDINGS
A total of 115 Class V wells have been inventoried in
Colorado, as summarized in Table 3. Inventory data forms for
these Class V injection wells are compiled in Appendix B. The
majority of Class V wells are found in either the Rocky Mountain
Arsenal or the Piceance Basin areas, while the total number of
verified wells outside of these areas is low. The final
inventory is based on Dr. Howard's preliminary inventory
(Appendix C). The original Howard inventory lists a total of
137 Class V injection wells in the State of Colorado. These
findings were revised by examining the computer inventory sheets
that accompanied Dr. Howard's report, eliminating duplicate
entries, and expanding the listing for wells related to oil
shale projects to account for individual wells or well locations
rather than installations. Table 4 summarizes the findings of
the original and revised Howard inventories discussed above, as
well as the SMC Martin inventory results.
The most significant change noted from the original Howard
inventory is in waste disposal wells. A total of nine septic
waste disposal wells were listed in the initial inventory. None
of these survived the verification procedure carried out in this
study. All were found to be septic tanks that drained to leach
fields on other septic systems without injection wells. In most
of these cases, the inventoried well diameter was in fact the
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TABLE 3
Summary of Inventory Results
by Well Type and Location
Description of Type	Total
a.	Return flow from heat exchange processes	5
b.	Waste disposal including mine backfill	2
c.	Aquifer recharge	81 *
d.	Oil shale extraction projects	2 3
e.	Surface water drainage	2
f.	Experimental technologies	2
Location of Wells Type	Total
a.	Rocky Mountain Arsenal c	81
b.	Piceance Basin d,f	25
c.	San Luis Valley c	*
d.	All other areas in Colorado a,b,e,	9
Plus an unverifiable number of recharge and accidental
center-pivot injection wells in the San Luis Valley and
High Plains.
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TABLE 4
Summary of Class V Injection Wells in Colorado
Well



Well Status





Totals
Type













Active

Active




Under




Confirmed
Unconfirmed**
Abandoned
Construction




0*
R*
z*
0* R*
F*
0*
R*
F*
0* R* F*
0*
R*
F*
1
3
3
2






3
3
2
2
0
0
0






0
0
0
3
1
l
1






1
1
1
4
2
2
2






2
2
2
5***
2
0
0
1 0
0
3
0
0

6
0
0 * * *
6
63
59
81
21 0
0
4
0
0
23 21 0
111
80
81
7
0
0
0






0
0
0
8***
1
2
1


0
0
1

1
2
2***

2
4
0


0
0
0

2
7
0 * * *
10
0
0
0






0
0
0
11
0
0
0






0
0
0
12
1
1
2
2 0
0




3
1
2
13
0
0
0






0
0
0
14
0
0
0






0
0
0
15
3
3
0


0
0
2

3
3
2
16
5
7
5


0
8
18
0 10
5
16
23
TOTALS
83
82
94
24 0
0
7
11
21
23 22 0
137
115
115
* 0 =
Original Howard
Inventory
(1984)
; R =
Revised
Howard Inventory
(1985 ]t>y

SMC Martin)
? F =
Final SMC Martin/EPA
Inventory



** Not represented on inventory sheets
*** These types are not differentiated on inventory sheets (=5W)

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diameter of the inflow pipe to the septic tank and the well
depth was the depth of the septic tank. This information was
gathered by contact with facility owners and operators.
The status of a number of wells was also revised pr updated
during the course of this study. A number of previously active
operations are now shut down (temporarily abandoned) and
21 wells at the Rocky Mountain Arsenal were changed from "under
construction" to active. Only one new well (Villa Mall) was
added to the inventory, and this well's existence was suggested
by a reference in the Howard inventory (Wright Carpet).
Overall, Dr. Howard's inventory seems to have been fairly
complete and accurate, with the exception of the waste disposal
wells. A 'well-by-well1 comparison of inventories is given in
Appendix C.
Each of the categories of Class V injection wells
inventoried (Table 1) has been evaluated in the Colorado-
specific hydrogeologic context to assess potential environmental
impacts. In the following section, wells have been grouped for
discussion according to EPA classifications found on EPA
Form 7500-48(11-79) (see Appendix B). The formal EPA
designation for each classification is listed, followed by the
well types in that category. In parentheses following the well
descriptions are the correlative "well type" designations as
used by Howard in Table 1. SMC Martin's well groupings are
listed in Table 3.
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1. Class VA Wells - Wells for return flow of water used in heat
exchange processes: ground-water heat pumps; geothermal
systems, cooling operations (Howard types 1, 3, 12 - see
Table 1)
This group includes all injection wells used to dispose
of water used for heating or cooling. There are five such
wells in the state: two heat pump return flow, two
geothermal return flow, and one cooling water return flow.
All of these are drilled cased holes with depths ranging
from 14 to 76 feet and casing diameters from 4 to
7.5 inches, dependent on the well's site and application.
Injection is under gravity pressure in all of these wells.
The potential environmental impacts of this group of
wells are varied. Temperature changes of ground water could
change aquifer chemical reaction rates, mineral stability,
and biota. Water from different aquifers might be mixed as
a result of injection by this type of well, with subsequent
disruption of receiving aquifer geochemistry. Air,
bacteria, or other materials such as Freon or pipe scale
might be introduced into the subsurface. Impacts could
include plugging, contamination, changed redox conditions,
and altered volatile concentrations in the aquifer.
Despite this long list of potential effects, properly
constructed and maintained systems are likely to have only a
minor and localized environmental impact (SMC Martin,
1983) . None of these effects have been reported in
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Colorado. The low number of Class VA wells in Colorado
further limits their potential environmental impact on a
statewide scale.
2. Class VW Wells - Wells Used for Residential and
Industrial Waste Disposal, including Mine Backfilling
(Howard types 2, 5, 8, 9 - see Table 1)
There are only two such "wells" in Colorado. Both are
mine backfill operations in which wet slurries are injected:
one at the Bulldog Silver Mine, and one at the Hawk's Nest
Coal Mine. Both of these mines are presently closed down.
At the Bulldog Mine, mine wastes are backfilled into stopes
to keep mine tunnels from collapsing due to the structural
instability of the rock. The Hawk's Nest operation uses
mined out levels for the disposal of mine wastes. In both
cases, thousands of cubic feet of material are, or have
been, injected. This group of wells poses a significant
potential for adverse environmental impact, though in
Colorado this potential is somewhat mitigated by the State
waste disposal and discharge regulations and the scarcity of
such wells.
Mine backfill operations present special problems where
ground water migrates through the backfilled mine voids and
leaches high concentrations of chemical species such as
heavy metals, sulfuric acid, cyanide and other byproducts
from milling processes, from the backfill material itself
(Klusman and Edwards, 1977) . Because stopes or other large
19

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mined out areas are typically backfilled, a large volume of
material may be deposited, adding to the potential for
adverse environmental impact.
E.
3. Class VR - Wells Used for Aquifer Recharge (Howard
type 6 - see Table 1)
In general, aquifer recharge wells pose the threat of
ground-water contamination primarily by: air injection,
which may change water redox conditions; introduction of
solids that can clog aquifer pore spaces; and by chemical or
biological contamination from other impurities picked up by
injected water. For this reason, well injection is
generally viewed as an undesirable means of aquifer recharge
by the Water Resources Division of the Colorado Department
of Natural Resources.
All 81 verified wells of this type are on the grounds
of the Rocky Mountain Arsenal and are relatively similar
with respect to construction and size. These are all 10 to
12-inch diameter cased wells with stainless steel screens.
Well depths range from 40 to 60 feet and each was drilled by
the reverse rotary method. Water injection into the wells
is by gravity pressure only. Because all of these wells are
concentrated on the grounds of the Rocky Mountain Arsenal
and are in use as part of a ground-water clean-up project, a
review of the project will serve as background for the
assessment of potential environmental impact.
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The Rocky Mountain Arsenal, located north-northeast of
Denver, manufactured products for use in chemical warfare
and as pesticides until 1982. Wastewater from the
manufacturing processes has been disposed of in evaporation
ponds and through a deep injection well. The latter
project, terminated in 1965, is well known because of the
occurrence of injection-related earthquakes (Evans, 1966).
However, because the deep injection well was abandoned and
plugged prior to the passage of the Safe Drinking Water Act,
it does not come under the scope of the UIC program, and
has therefore not been inventoried. However, the waste
disposal in evaporation ponds is directly relevant to this
inventory and assessment effort.
In an effort to contain and reverse the ground-water
pollution caused by seepage of wastewater from the
evaporation ponds, clean-up programs, including the use of
injection wells, in some areas of the Arsenal have been put
into effect. The wells reinject ground water that has been
extracted from contaminated zones and purified by carbon
filtering. Presently, there are three series of wells
active on the Arsenal ground. The North Boundary (21 wells)
and Northwest Boundary wells (38 wells) are operated by the
U.S. Army, while the Irondale Containment System wells
(22 wells) are operated by Shell Oil Company, which
manufactured pesticides at this location.
21

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All of these injection wells are designed to introduce
purified water, previously pumped out of contaminated areas,
back into the ground-water system. The injected water is
intended to reverse the contamination of the ground water in
the Rocky Mountain Arsenal and to contain existing contami-
nants within the site area (prevent off-site migration).
Therefore, if the project operates as designed, the injec-
tion will have a beneficial effect on the environment.
Possible problems could arise from air injection, solids
carried with the water, and contaminants not removed by the
filtering process.
A report on the North Boundary wells is due from the
U.S. Army Environmental Control office in the spring of
1985. This report should quantitatively address the
question of the environmental impact of the injection
wells. The environmental impact of Class V wells at the
Arsenal must be reviewed within the context of the clean-up
project as a whole. The technology of the RMA clean-up
project necessitates recharge by injection rather than
•natural' recharge through ditches, trenches, etc.
Therefore, injection-related problems, as discussed above,
may occur. However, viewed on the broad scale, the aquifer
recharge wells can only have a beneficial effect on the
environment compared to the pre-cleanup/injection
contamination levels in ground-water originating from the
Arsenal.
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The chemical irrigation-related pollution problem in
the San Luis Valley and High Plains (Figure 2) is a prime
example of the drawbacks of aquifer recharge by injection
wells (Appendix E). Mr. Ralph Curtis, of the Rio. Grande
Water Conservation District, and Mary Gearhart, of the State
Board of Health, provided much valuable information on this
subject. Agricultural irrigation is intensively practiced
in these regions, and center-pivot irrigation systems are
commonly used. In this technique, a 75- to 100-foot deep
extraction well feeds the pivot for a revolving structure of
wheeled towers which support a perforated water pipe, fed by
the central well. This revolving mechanism distributes
water to a circular field whose radius is equal to the
length of the water distributing pipe. There are an
estimated 1,700-1,800 of these center-pivot systems now in
use in the San Luis Valley and about 2,800 in the High
Plains.
If the outflow from the central well stops due to
misalignment of the system and if check valves on the
center-pivot do not function, then the potential exists for
injection as irrigation fluid runs back through the
center-pivot into the extraction well. This in itself may
not seem significant, but in many of the center-pivot
systems, fertilizers and pesticides are added to the
irrigation water in the distribution pipe. If fluid runs
from this pipe down the central well, then fertilizers and
23

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pesticides may find their way into the ground-water system.
This problem is part of chemigation-related pollution which
has been addressed in work by the USGS in Pueblo (Edelman
and Buckles, 1984) and the Water Quality Control Commission
of Colorado (1984). Since the center-pivot system acts as
an injection well only when it malfunctions, it is nearly
impossible to define individual irrigation installations as
Class V wells. Therefore, center-pivot 'injection wells'
cannot be identified or inventoried. The environmental
impact of center-pivot injection is, however, serious and
real. Fertilizers, if they enter the ground water, increase
nitrogen as nitrate plus nitrite in the shallow aquifer
underlying the irrigation region. The environmental impact
of pesticides on ground water is complex and deleterious.
In addition to the aforementioned problem with
irrigation well backflow, there is also strong evidence to
suggest that some former water supply wells in the San Luis
Valley are now being used for aquifer recharge. Most
aquifer recharge in this region occurs via infiltration of
surface waters from ponds and/or ditches. However, some
farmers are thought to utilize former water supply wells in
an aquifer recharge capacity. Surface runoff from
irrigation is directed to field corners where former
extraction wells may be in place and be used for injection
recharge. An estimate of "no more than 50" such wells was
made by Ralph Curtis. Wells may be converted from
24

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extraction to injection use simply by removing the pump and
related hardware and lowering the casing to ground level so
water can flow freely in. Identification of individual
sites is impossible without on-site inspection, since no
record exists of such conversions.
These unverified wells have the same potential
environmental impacts as other aquifer recharge wells. The
main problems are the possibilities of air injection, solids
introduction, and contamination of ground water by chemical
and/or biological impurities, particularly fertilizers and
pesticides.
In summary, it appears that the San Luis Valley and the
High Plains may have numerous agriculture-related injection
wells, none of which are verifiable without on-site
investigation. These wells, if they exist, pose the
potential of ground-water pollution by a variety of
contaminants.
4. Class VX - Wells Associated with In Situ Oil Shale
Recovery and Experimental Wells in the Piceance Basin
(Howard types 15, 16 - see Table 1)
The Parachute Creek Member of the Green River Formation
in the Piceance Basin (Figure 3) has been the location of
experimental and production-oriented oil shale extraction
projects since 1955. Although some of the project sites are
temporarily or permanently abandoned, others are presently
(2/85) active. In these projects, three distinctly
25

-------
hid
Area underlain by the G'een River
Fofiat'on rn which the o
-------
different technologies are utilized to extract petroleum
products from oil shale. They are: above ground retorting;
in situ and modified in situ (MIS). The latter two
processes involve underground retorts and Class V injection
wells. Retorting is the process in which oil shale is
heated to free the oil it contains for extraction. Above
ground retorts may be containers into which mined crushed
oil shale is placed for burning. Underground retorts are
simply the zones of oil shale which are to be heated. Both
in situ and HIS processes use underground retorts
(Figure 4).
The in situ process, as applied in the Piceance Creek
Basin by the Equity Oil Company (BX project), utilizes steam
injection into underground retorts to mobilize shale oil.
Extraction wells then pump the hot oil/water mixture out of
the report. Eight steam injection wells were installed for
this project, averaging 1,396 feet deep with 22 perforations
for injection. The perforations are in two groups below the
785-foot (average) level in each well.
Modified in situ processes involve partial mining of an
underground retort and subsequent burning of the oil shale
to drive the oil out. Both Occidental Oil Shale Company and
Cathedral Bluffs Shale Oil Company use an MIS system in
which hot inert gas and air are injected by pipes into the
retorts to facilitate burning. Each retort uses a number of
injection conduits, the number depending on the stage of the
27
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'Rwofled Btoc*
b»ing Retorted
'— Btoc* i**der Development

Idealued diagram thowing the modified in litu method of development of oil shale
resources. (From U.S. Department of Energy )
Figure 4. Retorts using injection as part of shale oil
extraction process
Source: Keller, E. A., 1982, Environmental Geology.3rd.ed.
In the modified in situ method, underground retorts are
partially mined out, then rubblized (broken up by
explosions) and ignited. The ignition is facilitated
by the injection of hot gases and air. Mobilized oil
is then pumped out.
28
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project in which the retort is being used. This technology
is proprietary and details of retort construction could not
be obtained.
An MIS process was also used by the Rio Blanco Oil
Shale Company in their project, which is no longer active.
Two retorts with gas injection to promote oil shale burning
were utilized on this site. In addition, six aquifer
recharge wells were installed to reinject ground water
extracted from the retort areas to facilitate dry burning.
These six wells are 6.5-inch cased holes drilled to an
average depth of 1,322 feet.
In addition to these active and inactive operations,
there are presently two proposals before the U.S. Synthetic
Fuels Corporation for large-scale extraction projects in the
Piceance Basin. The companies involved are Union Oil
Company and Cathedral Bluffs Shale Oil Company. Four MIS
retorts will be constructed if the Cathedral Bluffs Oil
Shale Company proposal is funded. The Union Oil Company
project uses aboveground retorting technology and no
injection wells.
Injection wells used in oil shale extraction introduce
by design a variety of fluids into the subsurface. In the
case of the water reinjection wells of the Rio Blanco
Company, the potential environmental impact is that of any
aquifer recharge well: introduction of oxygen, solids,
bacteria, or other contaminants into the ground water.
29
-------
MIS-related hot inert gas injection and oxidation-
promoting air injection could, where employed, elevate
ground-water temperatures significantly, introduce mobilized
shale oil into an aquifer, and change the redox and volatile
conditions in the ground water. In any case, the
environmental impact of MIS-related injection wells is
greatly overshadowed by the overall impact of the oil shale
extraction (mining) process. Thus, the environmental impact
of Class V injection wells associated with any oil shale
extraction project must be evaluated within the context of
the project and its overall impacts as a whole.
5. Class VX - Wells Used for Experimental Technologies
(Howard type 15 - see Table 1)
Two additional wells designed for nahcolite (sodium
bicarbonate) extraction and classified as experimental
technology wells were inventoried in the Piceance Basin
(Appendix F). One nahcolite recovery well was drilled to
1,843 feet and the other to 1,849 feet in depth. Six-inch
casing extends to the 1,802- and 1,800-foot depths, respec-
tively, with the remaining lengths of hole uncased for hot
water injection. Hot water is injected through these wells
into a saline zone where nahcolite is dissolved by the
water. The nahcolite-bearing pregnant solution is then
pumped back to the surface. Since injected fluid is subse-
quently pumped out and the injection zone is relatively
impermeable and underlies the lowest USDW, no significant
30
-------
environmental impact is presumed to have occurred from the
operation of these now abandoned wells.
Another experimental technology well that appears in
c-
the initial inventory is the VTR in Longmont. This
operation was removed from the inventory under instruction
from the EPA because it is a sealed system that does not
inject into the subsurface.
6. Class VD - Wells Used for Surface Drainage (Howard
type 4 - see Table 1)
One facility with two of these wells was inventoried in
Colorado. Both wells are 2 0 feet deep, 3 6 inches in
diameter, and inject under gravitational pressure. These
surface flow drain wells can have significant environmental
impacts related to the introduction of surface-derived
contaminants into ground water. The inventoried wells,
however, are used for disposing of roof runoff at an
elementary school. These wells seem to have very little
potential for adverse environmental impact, since harmful
material is unlikely to be concentrated in snowmelt from a
school roof.
31
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MAINTAINING AN UPDATED CLASS V INVENTORY
This inventory is presently complete except for the San Luis
Valley and can be maintained with periodic updating. To
facilitate the updating process, the permit application form
(Colorado Form WRJ-5, Rev. 76, illustrated in Figure 5) for well
installation could be revised to include a classification of the
well by use as injection or extraction. If this change were
made, updating of the inventory could be accomplished simply by
reviewing well permit applications and inventorying the
injection wells. The Colorado Division of Water Resources
(Contact: Mary Gearhart) is presently (3/85) revising its
ground-water regulations. EPA involvement in this process could
perhaps ensure that the new regulations would classify and list
injection wells in one state file. This file could then be
monitored by the EPA and an updated inventory maintained
accurately.
With respect to the San Luis Valley and High Plains, this
inventory could be established and maintained by cooperation
from the State and federal agencies (e.g., Colorado Deprttment
of Health, USGS) who are investigating the chemigation-related
pollution problem in these areas. Identifying and inventorying
aquifer recharge wells and chronically injecting center-pivot
systems could become part of the focus of broader scale studies
in this region. The most effective, if not time efficient,
means of carrying out this task would be to conduct a
32
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»RJ 5 Rt> 76
Application mur
be complete w+iere
«ppliC*bif Type or
print in BLACK
INK No ovtritrikes
c erasures unless
mauled
COLORADO DIVISION OF WATER RESOURCES
S1I Cen»nni»l &ldg , 1313 Storm** St.. Denver. Colorado 10203
PERMIT APPLICATION FORM
( ) A PERMIT TO USE GROUND WATER
i ) A PERMIT TO CONSTRUCT A WELL
FOR ( I A PERMIT TO INSTALL A PUMP
i I REPLACEMENT FOR NO
< )OTHER	
WATER COUR7 CASE NO .
0) APPLICANT • mailir>g address
NAME .
STREET.
CITY.
TELEPHONE NO
(2) LOCATION OF PROPOSED WELL
County
_* Of the.
. V Section.
T wd
		 Rng
i* S
P M
(3) WATER USE AND WELL DATA
Proposed maximum pumping r«it (gpm)
Aver*9? annua' amount Of ^Ou»d water
to be Appropriated (ac»e-fe*t) 	
Numt*' of acres to be irrigated
Proposed total depth (feet) _
^u'f* ground watr ts to be obtair>«d from
Owner's well designation	
GROUND WATER TO BE USED FOR
( 1 HOUSEHOLD USE ONLY no irrmi.on (01
( ) DOMESTIC (11
I LIVESTOCK I?)
I COMMERCIAL 14]
( I INDUSTRIAL 151
( I IRRIGATION (61
I ) MUNICIPAL IB)
( lOTHER(9>_
DETAIL THE USE ON BACK IN (11)
<41 DRILLER
N»mf .
Strm .
Crty
T^eo^onf Nd
"Trum—
_ Lie No .
-jrsr
FOR OFFICE USE ONLY DO NOT WRITE IN THIS COLUMN
Rtcupt No .
Bann
D.it
CONDITIONS OF APPROVAL
This well shall be used in such a way as to cause
no material injury to existing water rights The
issuance of the permit does not assure the applicant
thai no iniury will occur to another vested water
right or preclude another owner of a vested water
right from seeking relief in a civil court action
APPLICATION APPROVED
PtRMIT NUMBER	
DATE ISSUED	
EXPIRATION DATE .
(STATE ENGINEER)
BY.
ID
. COUNTY.
Figure 5. Well Permit Application form,
Colorado Division of Water Resources
33
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farm-by-farm inventory of irrigation practices. In addition,
irrigation supply houses could be checked to help to identify
chronically malfunctioning systems. The EPA should work closely
with the State so that an effective inventory of injection wells
in these regions can be developed. Such an inventory could be
carried out by extensive field work to evaluate irrigation
practices and systems in the potential problem areas. Because
chemigation in Colorado is a present concern of the State
Department of Health (Appendix E), the EPA should work directly
with this agency during their investigation of the problem.
After the state's investigation is finished, the EPA can conduct
an evaluation to determine its completeness. A decision can
then be made as to whether further work is needed with respect
to providing the basis for a well inventory. From a complete
evaluation of chemigation in Colorado, an inventory of Class V
injection wells related to this problem could be compiled. In
addition, a plan could be developed to relieve the adverse
environmental impact of these injection wells.
34
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CONCLUSIONS OF INVENTORY AND POTENTIAL ENVIRONMENTAL
IMPACT STUDY
One hundred and fifteen Class V injection wells have been
verified in the State of Colorado. Of these, 81 are on the
grounds of the Rocky Mountain Arsenal as part of their
ground-water clean-up operations, and 25 are in the Piceance
Creek Basin involved with oil shale and nahcolite extraction
installations (Figure 3). These two fairly limited geographic
regions contain more than 90 percent of all verified Class V
wells in Colorado. The San Luis Valley and High Plains have the
potential for many Class V wells, although none could be
verified there during this effort.
These four areas with real or suggested concentrations of
wells present special problems regarding environmental impact.
Overall, however, only the San Luis Valley and High Plains have
significant potential for environmental impact of injection
wells. In the other two areas, the potential impact of the
injection wells is overshadowed by the large-scale projects of
which they are part.
Outside of the four well concentrations, there are
relatively few injection wells. The potential environmental
impact of these wells is limited and localized in part because
of the sparse distribution of the wells throughout the state.
35
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BIBLIOGRAPHY AND REFERENCES
Dougan, P. M., 1983. BX In Situ Oil Shale Project: Final
Report; U.S. DOE, Washington, DC.
Evans, D. M., 1966. Man-made earthquakes in Denver: Geotimes.
V. 10, No. 9, p. 11-18; in: Tank, R. W., ed., 1976 Focus on
Environmental Geology. Oxford University Press, New York.
Johnson Div. UOP Inc., 1975, Groundwater and Wells. Johnson
Div., UOP Inc., St. Paul, MN.
Keller, E. A., 1982. Environmental Geology. 3rd ed.. Charles E.
Merril Publishing Co., Columbus, OH.
Klusman, R. W., and K. W. Edwards, 1977. Toxic metals in ground
water of the front Range, Colorado: Groundwater. V. 15,
No. 2, p. 160-170.
Lehr, J. H., W. A. Pettyjohn, T. W. Bennett, J. R. Hanson, and
L. E. Sturtz, 1976. A Manual of Laws. Regulations, and
Institutions for Control of Ground-Water Pollution. U.S.
EPA, Washington, DC.
Linsley, R. K., and J. B. Franzini, 1979. Water Resources
Engineering. McGraw Hill, Inc., New York.
McGrew, J. L., and C. B. Casetti. The Vertical Tube Reactor: A
Wet Air Oxidation Process, Report. Applied Science and
Egnineering, Inc., Englewood, CO.
Weimer, R.J., and J. D. Haun, eds., 1960. Guide to the Geology
of Colorado. Rocky Mountain Assn. of Geologists, Denver, CO.
Edelman, P. and D. R. Buckes, 1984. Quality of Groundwater in
Agricultural Areas of the San Luis Valley. South Central
Colorado. USGA WRI Report 83-4281, Lakewood, CO.
Miller, J., 1980. The legal implications of ground water heat
pump use, Water Well Journal, v. 34, #7, p. 66.
Colorado Department of Health, Office of Health Protection,
Water Quality Control Division, 1984. Ground Water
Protection for Colorado.
-------
APPENDIX A
Final Inventory Telephone Contacts
-------
A series of coded notations appears behind the name of each
individual or agency included on this list of contacts. That
code provides information on either the individual contacted or
the topic on which they provided input. A legend describing
these coded notations follows:
Legend to Coded Notations
* owner of well, preliminary Howard inventory
o owner of well, final SMC Martin inventory
Well information gained from contact
a.	general
b.	aquifer recharge
c.	oil shale related
d.	mine and waste disposal
e.	heat exchange process related
f.	drainage
g.	experimental technology
U.S. Government
U.S. Department of Energy, Laramie, WY
Mr. Basky - c
U.S. Department of the Army, Rocky Mountain Arsenal - b, o*
Tom Donnelley, Public Affairs
Mike Witt, Environmental Control
Synthetic Fuel Corporation (SFC), Washington, DC
Karen Hutchinson, Media Relations - c
U.S.G.S., Pueblo - a, b
Colorado State Government
Department of Natural Resources
Division of Mines - d
Division of Water Resources - a
Bruce DeBrine
Reiner Haubold
Bob Kepper
Bob Longenbaugh
Steve Smith
Geological Survey - a
Jeff Hines
Department of Highways - a
Gary Johnson
Del Roupp
Brandy Gilmore
A-l
-------
Legend to Coded Notations
* owner of well, initial inventory
o owner of well, final inventory
Well information gained from contact
a.	general
b.	aquifer recharge
c.	oil shale related
d.	mine and waste disposal
e.	heat exchange process related
f.	drainage
g.	experimental technology
Department of Health - a, b, d
John Farrel
Water Quality Control Division
Greg Brand
Mary Gearhart
Dan Simpson
Gary Starkebaum
Department of Revenue - e
Water Resources Research Institute,
Fort Collins, CO - a, b
Norm Evans, Director
Other Public Sector Contacts
Central Platte River Water Conservancy District - a, b
Tom Cech	Alamose, CO
Rio Grande Water Conservation District - a, b
Ralph Curtis
Round Mountain Sanitation District - d
City of Delta, CO - d, *
Frank Dicamillo
City of Salida, CO - d, *
Randy Sack
Town of Aguilar, CO - d, o *
Town of Westcliffe, CO
Glenwood Springs, CO, Water Department - e
Pagosa Springs, CO, Water Department - e
Steamboat Springs, CO, Water Department - e
Buena Vista, CO, Water Department - e
Alamosa City, CO, Water Department - e
Oklahoma State University
Technical Extension, Stillwater, OK - e
Mesa County, CO, Valley School District 51,
Grand Junction, CO
Dick Ross - f
A-2
-------
Legend to Coded Notations
* owner of well, initial inventory
o owner of well, final inventory
Well information gained from contact
a.	general
b.	aquifer recharge
c.	oil shale related
d.	mine and waste disposal
e.	heat exchange process related
f.	drainage
g.	experimental technology
Organizations
National Water Well Association
Kevin McRae - e
Colorado Water Well Contractors Association - a, e
Rocky Mountain Association of Geologists
Ray Marvin, Publicity Manager - a
Individuals and Businesses
Amax Exploration Inc. (mining co.), Golden, CO - d
Western Slope Carbon Co. (mining co.), Salt Lake
City, UT - d, o *
Homestake Mining Co., Creede, CO - d, o *
Union Oil Co., Los Angeles, CA
R. M. Horton - c
Occidental Oil Shale Co., Grand Jet., CO - o *
Ray Zahradnik - c
Cathedral Bluffs, Shale Oil Co., Grand Jet., CO - o *
Barney Phillips - c
Rio Blanco Oil Shale Co., Aurora, CO - o *
Butch Slawson, Public Relations - c
Stan Fowkes, Tract Supervisor - c
Equity Oil Co., Salt Lake City, UT - o
Paul M. Dougan, Manager - c
Shell Oil Co., Denver, CO - c, o *
Shell Oil Co., Houston, TX - o *
Peter Fisher - b (RMA)
Bill Adcock - b
Western States Construction Co., Loveland, CO - b (RMA)
Westvaco Corp., Covington, VA - b (RMA)
Industrial Resources Inc., Lakewood, CO
Edward Rosar - g, *
Bechtold Construction, Wheatridge, CO
Mr. Bechtold - a, b (RMA)
A & J Drilling Co., Westminster, CO - a
Arrow Drilling Co., Arvada, CO - a
-------
Legend to Coded Notations
* owner of well, initial inventory
o owner of well, final inventory
Well information gained from contact
a.	general
b.	aquifer recharge
c.	oil shale related
d.	mine and waste disposal
e.	heat exchange process related
f.	drainage
g.	experimental technology
Jack Allen Drilling, Fairplay, CO - a
J. L. Beeman Drilling, Denver, CO - a
Heir Drilling, Castle Rock, CO - a, b
James Drilling, Denver, CO - a
Stewart Drilling Co., Sterling, CO - a, e, *
(installed two heat pump wells)
Pumps, Inc. (well pumps), Denver, CO - a
Scott Cox & Assoc. (drainage engineers), Boulder, CO - a
Environmental Systems (HVAC contractor), Boulder, CO - e
Furgeson Sheet Metal (HVAC contractor), Sterling, CO - e
I.E. Sharp & Co. (HVAC contractor), Denver, CO - e
Equipment Distributors, Inc.(HVAC supply), Denver, CO - e
Sigler & Faigen (HVAC Supply), Denver, CO - e
Westburne Supply, Inc. (HVAC Supply), Denver, CO - e
Westcon (HVAC Supply), Denver, CO - e
Western Plastics (heat pump pipe manufacturers),
Denver, CO - e, *
Noffsinger Mfg. Co., Greeley, CO - e, o *
Wright Carpet, Alamosa, CO - o *
Bob Owens - e
Indiana Springs, Greenhouse, Ridgeway, CO - o *
Walt Hill - e
John Stoody, Delta, CO - d, *
Ralph Watt, Sterling, CO - e, o *
Charles Staley, Merino, CO - e, o *
A-4
-------
APPENDIX B
Inventory Forms, Final Inventory of Class V
Injection Wells for the State of Colorado
These forms represent the final inventory compiled by
SMC Martin and based on the Howard 1984 inventory.
(in "Comments" section of each form,
T = Township, R = Range)
-------

Form Approved OMB No. I58-R0I70
vvEPA
U.S. ENVIRONMENT AL PROTECTION AGENCY
OFFICE OF DRINKING WATER
INVENTORY OF INJECTION WELUJ
(Thim information t» collected under
tf!• muthorlty ot the Sate Dtlnktng Water Act• )
WELL OPERATION STATUSt
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-------
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U.S. environmental protection agency
OFFICE of DRINKING WATER
INVENTORY OF INJECTION WELLS
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~ . COMMENTS (optlonmi)
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Form Approved OMB No. 158mR0170
vvEPA
U.S. ENVIRONMENTAL protection agency
OFFICE OF DRINKING WATER
INVENTORY OF INJECTION WELLS
(Thlm information l« collmeted under
the authority ot the Smto Dttnktng Wmtet Act*)
IV. FACILITY NAME ANO LOCATION
V. LEGAL CONTACT: TYPE, NAME, PHONE. MAILING ADDRESS, AND OWNERSHIP]
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-------
*>EPA
U.S. ENVIRONMENTAL PROTECTION AGENCY
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INVENTORY OF INJECTION WELLS
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Form Approved OMB No. 15SmR0t70
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U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF ORINKING WATER
INVENTORY OF INJECTION WELL*
(Thla information /• collected under
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Form Approved OMB No. 158-R0170
vvEPA
U.S. ENVIRONMENTAL protection agency
OFFICE OF DRINKING WATER
INVENTORY OF INJECTION WELLS
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-------
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D. COMMENTS (optional)
Coal mine backfill
T13S, R90W
-------
v>EPA
U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF DRINKING WATER
INVENTORY OF INJECTION WELLS
(Thi» information l§ collected under
fh« authority ot the Smte Dtlnktng Water Act*)
IV. FACILITY NAME AND LOCATION

Form Approved QMB No. I58-R0170
III. TRANSACTION TYPE CX- on.;
V
L
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TYPE,
NAME, PHONE, MAILING ADDRESS, AND OW|n
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abandoned and not approved by state

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-------
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U.S. ENVIRONMENTAL protection agency
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INVENTORY OF INJECTION WELUJ
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" WINDING DOWN " 1/85
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EPA Form 7500-48 (I I -79)
-------
*>EPA
U.S. ENVIRONMENTAL protection agency
OFFICE OF ORINKING WATER
INVENTORY OF INJECTION WELLS
(Tht* information (• collected under
tho muthorlty ot the Smte Dtlnktnf Wafer Act*)
IV. FACILITY NAME AND LOCATION
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D. COMMENTS (options!)
' T - IS R - 98W
-------
APPENDIX C
Data Sheets from Initial Howard Inventory
of Class V Injection Wells
These sheets are reproductions of the computer data sheets
which comprise the initial Howard inventory. There is one sheet
for each inventoried well in the original inventory. In this
appendix, the Rocky Mountain Arsenal wells are represented by a
single sheet. In the original inventory, there were 111 such
sheets. These inventory sheets represented here have been
superseded by the inventory forms in Appendix B.
-------
PRINTED 10/25/84
INVENTURY OF
COLORADO INJECTION bELLS
FIELD!	4700 HAVANA ST.
WELLNANEI	WESTERN PLASTICS CORPORATION
FACILITY IUl	COSAD2J3S67
COUNTY I	AOAMS
TwP RNG SC OTR.SEC
••• •••• mm
LOCATIONS IS -67M -23-NW
NS.LINE EM,LINE
OWNER/OPERATOR!
WESTERN PLASTICS CORPORATION
ADDRESS! 4700 HAVANA ST.*
DENVER
CO
8023V
CLASS/TYPE I SA
STATUSl ACTIVE
RECEIVING FORMATION I SAND CREEK
GEOLOGIC AGE I QUATERNARY
INJECTION INTERVAL(FT)I
AMUUNT OF FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURECPSI)I	0
FORMATION PRESSURECPSI)I
FORMATION H20 QUALITY IN TDS(PPN)!
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR ORILLEDI
YEAR OF INITIAL INJECTION!
TOTAL DEPTH!
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TESTS
COMMENTS!NO OTHER INFORMATION AVAILABLE.
DATE PREPARED I 04/28/83
"D
JJ
m
>
30
•<
m
z
¦H
O
30
•<
bELL DIAMETER(IN)|
PACKER!
TRUING!
DRILL STEM TEST!
CEMENT BOND LUG!
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CEMENT!
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER I
NUMBER SACKS CEMENT!
SET ATI
SET AT!
-------
PRINTED 10/25/84
FIELD I
WELLNAMEl IDAHO SPGS, RETURNFLOW WELL
FACILITY IDl COSOU2245N8A
FACILITY IDl COSOU224SN8A
COUNTY I OURAY
TWP RNC SC OTR.SEC NS.LINE EM,LINE
• •• • ••• •m	mmmmmmmm
LOCATION I 45N- -tlw-	-22SESW
RECEIVING FORMATION!
GEOLOGIC AGE I
INJECTION INTERVAL(FT)I 1-14
amount or rmio injection(bbl/ho) i
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PS1)I	0
FORMATION PRESSURE(PSI)|
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLCDl
YEAR Or INITIAL INJECTIONI 1983
TOTAL DEPTH! 14
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I 7013
MECHANICAL INTEGRITY TEST!
COMMENTS!
DATE PREPARED! 06/28/84
INVENTORY UF
COLORADO INJECTION WELLS
30
m
OWNERi HILL, WALT
OPEHATOMl HILL, WALT
INDIAN SPRINGS GREENHOUSE
ADDRESS! 1000 COUNTY RD 83
RIDGEWAY
CO	81432
CLASS/TYPE! 5A
$TATUS| ACTIVE
WELL DIAMETER(IN)I 4
PACKER!
TJ	TUBINGI
DRILL STEM TESTl
CEMENT BOND LOG!
SURFACE CASING DEPTWI
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CEMENT!
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE Or TUBINGI	SET ATI
NUMBER OF PACKERS!	SET ATI
casing lineri
NUMBER SACKS CEMENTl
>
30
<
m
O
30
-<
-------
PRINTED 10/25/84
t'lLLDl
WELLNAMEl	STEWART HEAT PUMP HELL II
FACILITY ID I	CUSLG246N54A
FACILITY IDS	C03LG246N54A
COUNTY I	LOGAN
TWP RNG SC QTR.SEC NS.LINE EW.LIN
LOCATION I	6N -54W -24-HH	-1625FNL -900FWL
RECEIVING FORMATION I
GEOLOGIC AGEl
INJECTION INTERVAL(FT)S
AMOUNT OF FLUID INJECTION(BBL/HO)I 15
CUMULATIVE I
AVERAGE INJECTION PRESSURE(P5I)I	0
FORMATION PRESSURECPSI)I
FORMATION H20 QUALITY IN TDS(PPM)S
INJbCTED H20 QUALITY IN TDS(PPM)I
YEAR ORILLEDl
YEAR Or INITIAL INJECTIONI 1975
TOTAL DEPTHS 60
PLUG BACK DEPTH I
GROUND ELEVATION(FT)t
>MECHANICAL INTEGRITY TEST I
CONMENTSI
DATE PRLPAREDl 06/26/64
INVENTORY OP"
COLOHADU INJECTION WELLS
OrfNERi STf
OPERATOR | 8TkwT0^T7~DENNIS
STtJ^AR/ DRILLING CO,
ADDRESSl 18 69>>
50
m
z
H
O
30
-<
DRILL STEM TEST!
CEMENT BOND LOGl
SURFACE CASING DEPTHI
NUMBER SACKS CEMENTS
SHORT SIRING DEPTHI
NUMBER SACKS CEMENTS
LONG STRING DEPTHS
NUMBER SACKS CEMENTS
SIZE Or TUBINGS	SET ATS
NUMBER OF PACKERS!	SET ATS
CASING LINERS
NUMBER SACKS CEMENTS
-------
PRINTED 10/25/84
FIELD I
WELLNAMEI	STEWART HEAT PUMP HELL «2
FACILITY IDI	COSLGJ08N52A
FACILITY IDI	COSLG304N52A
COUNTY I	LOGAN
TmP RNG SC QTR.SEC N5.LINE
LOCATIONS	«N -52* -30-5W *
RECEIVING FOHNATIONf
GEOLOGIC AGEI
INJECTION INTERVALCFT)I
AMOUNT OF FLUID INJECTIONCBBL/MO)I IS
CUMULATIVEl
AVERAGE INJECTION PRESSURE(P8I)I
FORMATION PRE8SURECP8I) I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLCDl
YEAR OF INITIAL INJECTIONl 198
TOTAL DEPTHS 76
PLUG BACK DEPTH!
GROUND ELEVATION(FT)!
MECHANICAL INTEGRITY TEST!
COMMENTS!
DATE PkEPARLDI U6/2U/84
INVENTORY UF
COLORADO IN JLCTlliN WELLS
LINE
CLASS/TYPE I
STATUS!
T)
30
m
>
30
<
O
30
-<
OWNtRI STEWART, DENNIS
OPERATOR! STEWART« DENNIS
8TEftAft
-------
NTI '25
INVENTORY OF
COLOHADO INJECTION HELLS
FILLDl
WELLNAMEl	NOFFSINGER HEAT;>*4l«p WELL
FACILITY 101	COSWL53N6SWA
COUNTY I	MELD
TUP RNC SC OTH.SEC
• ••
LOCATION| 5N -65* -5 -NWSE
NS.LINE EW.LINE
OWNER| DON N0FF5INGER
NOFFSINGER MANUFACTURING CO,
ADDRESS! 500 6TH AVE.
GREELEY
CO
00631
CLASS/TYPE I SA
6TATUSI ACTIVE
RECEIVING FORMATION I ALLUVIUM
GEOLOGIC AGEl
INJECTION INTERVAL(FT)| 19 - 34
AMOUNT OF FLUID INJECTION(BBL/MO)I 19
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI) |	0
FORMATION PRESSURE(PSI) |
FORMATION H20 QUALITY IN TOS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLEDI 1976
YEAR OF INITIAL INJECTION!
TOTAL DEPTH! 41
PLUG BACK DEPTH! 34
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TEST!
Commentsitype 3 - cuoling hater return
C^ATE PREPARED! 06/21/84
¦o
3D
m
>
39
m
z
H
O
30
-<
HELL DIAMETER(IN)I 9
PACKER!
TUBING!
DRILL STEM TEST I Y
CEMENT BOND LOG!
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CMENTl
LONG STRING DEPTH!
NUMBER SACKS CEMENT I
SIZE OF TUBING!
NUMBER OF PACKkflSl
CASING LINER!
NUMBER SACKS CtMCNTl
SET ATI
SET ATI
-------
t\ I ¦< 1 .	i ' / 4. J / • I
FIELDl
WELLNANEI CHATFIELD DRAINAGE HELL II
FACILITY IDl COSMS1S1S1EA
FACILITY IDl C0SMS13151EA
COUNTY I MESA
TNP RNG SC OTR.SEC N5.LINE EH.LINE
m
LOCATION I 15 -IE -15-NE
RECEIVING FORMATION!
GEOLOGIC AGE!
INJECTION INTERVAL(FT)I 12 - 30
AMOUNT Or FLUID INJECTION(BBL/MOJI
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSX)I
FORMATION HJO OUALITY IN TD8(PPM)|
INJECTED H20 DUALITY IN TDS(PPM)I
TEAR DRILLED!
TEAR OF INITIAL INJECTIONl 1978
TOTAL DEPTH! 20
PLUG BACK DEPTH!
GROUND ELEVATION(FT)! 4600
MECHANICAL INTEGRITY TEST!
CONMENTSlROOF DRAIN RUNOFF DISPOSAL
DATE PREPARED! 06/28/84
INVENTORY or
COLORADO INJECTION MELLS
CLASS/TYPE!
STATUS!
"O
DO
m
H
o
73
<
OHNERl LEE, HOWARD A,
OPERATOR! LEE, HOWARD A,
CHATriELD ELEMENTARY SCHOOL
ADDRESS! 3188 D 1/2 ROAD
GRAND JUNCTION
CO	81504
3D
ACTIVE
WELL DIAMETER (Wr 10
PACKER!
TUBINC!
DRTLL STEM TESTT
CEMENT BOND LOCI
SURFACE CASING DEPTH!
NUMBER BACKS CEMEIfTI"
SHORT STRING DEPTH!
NUMBER SACKS CENENTl
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING!	SET AT!
NUMBER OF PACKERS!	SET AT!
CASINC LINER!
NUMBER SACKS CEMENT!
-------
PRINTED 10/25/84
FIELD!
VELLNAMEl CHATFIELD DRAINAGE HELL (3
FACILITY IDI C03M315181EB
FACILITY IDI COSMS1S1S1EB
COUNTY I NCSA
THP RNG 8C QTR.SEC NS.LINE EH.LINE
mm* mmmm m m »•••«••••
LOCATION I IS -IE -13-NE
Receiving formationi
GEOLOGIC AGEl
INJECTION INTERVAL(FT)I 12 - 20
Amount of fluid injection(bbl/mo)i
cumulativci
AVERAGE INJECTION PRE8SURE(P3I)I 0
FORMATION PRtSSURECPSI)!
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)I
YEAR DRILLEDl
YEAR OF INITIAL INJECTIONI 1978
TOTAL DEPTHS 20
PLUG BACK DEPTHl
GROUND ELEVATION(FT)I 4600
MECHANICAL INTEGRITY TESTl
COMMENTS I ROOF DRAIN RUNOFF DISPOSAL
DATE PREPAREDl 06/20/04
INVENTORY UF
COLORADO INJECTIUN WELLS
OWNER I LEE t HOWARD A,
OPERATOR| LEE, HOWARD A,
CHATF1ELD ELEMENTARY SCHOOL
ADDRESS t 310 3 D 1/2 ROAD
GRAND JUNCTION
CO	81304
TJ
JO
m
CLASS/TYPE I 3D
STATUSI ACTIVE
WELL DIAMETKR(IN) I 10
PACKER I
TUBING!
DRILL STEM TESTl
CEMENT BOND LOGl
8URFACE CASING DEPTHl 12
NUMBER SACKS CEMCNTl
SHORT STRING DEPTHl
NUMBER SACKS CEMENT I
Lowfi string Depthi
^	NUMBER SACKS CEMENTl
m	SIZE OF TUBINGI	SET ATI
2	NUMBER OF PACKERS!	SET ATl
<
CASING LINER!
NUMBER SACKS CEMENTl
>
J3
m
H
O
JJ
<
-------
PRINTLD 10/25/84
fICLDI
WELLNAMCI RH-11
FACILITY ID I COSAD2J2S67M
COUNT* I ADAMS
TrtP PNC SC QTH.SEC NS.LINE EM,LINE
•••• ¦« *••••••••
LOCATION I 2S >67H -2J-NWNC -600FNL -232SrtL
RECEIVING FORMATION I ALLUVIUM
GEOLOGIC ACE I OUARTERNARY
INJECTION INTCRVAL(FT)I 7.1 - 14,8
AMOUNT OF FLUID INJECT10N(BBL/MO)I
CUMULATIVCI
AVERAGE INJECTION PRESSUHE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLCDl
YEAR Or INITIAL INJECTION I
TOTAL DEPTHI 18,8
PLUG BACK DEPTHI 14.8
GROUND ELEVATION(FT)I 6149
MECHANICAL INTEGRITY TEATI
COMMENTS IN, X , BOUNDARY
DATE PREPARED I 07/0J/84
INVENTORY LIT
COLORADO INJECTION NELLS
.	OWNER I SMITH, RICHARD LTC
DEPT UF THE ARHY
P/*?	ADDRESS I ROCKY MNT ARSENAL
V n	COMMERCE CITY
.	CO	80022
'¦-A
•A,
CLASS/TYPE I 5H	$y.
STATUSl ACTIVE	f)y
HELL DIAMETER(IN)I 12
"TJ
33
m
PACKER!
TUBINGl
DRILL STEM TEST I
CEMENT BOND LOGl
|—	SURFACE CASING OCPTHl 7.1
^	NUMBER SACKS CCMCNTt
—	SHORT STRING DEPTHI
z
~~	NUMBER SACKS CEMENTl
jj	LONG STRING DEPTHI
NUMBER SACKS CEMENTl
flizc or TUBINGl	SET ATI
m
z
H
O
JJ
<
NUMBER OP PACKEHSl	SET ATI
CASING LINCRl
NUMBER SACKS CEMENTl
-------
PRINTED 10/25/84
INVENTORY or
COLORADO INJECTION WELLS
riLLDI	DEPT OK ARMY R.M.A,
WELLNAMEl	SHELL OIL COMPANY IRONDALC CONTAINMENT SYSTEM
FACILITY ID I	COSAD272S67A
COUNTY I	ALAMOSA
TMP RNG SC QTR.SEC
mmm mmmm mm mmmmmomwn
LOCATION I 2S -67H -27" NN
NS.LINE Etf.LINE
OPERATOR I MR, WILLIAM ADCOCK
SHELL OIL CO, ONE SHELL PLA|A
ADDRESSI P.O. BOX 4)20
HOUSTON
TX	77210
CLASS/TYPEl 5R
STATUS! UNDER CONSTRUCTION
TJ
J3
m
RECEIVING FORMATION I DENVER FORMATION
GEOLOGIC AGE! IQCENE/PALEOCEN
INJECTION INTERVAL(FT)I
AMOUNT OF FLUID INJECTION(BBL/MO)|
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPN)|
INJECTED H20 QUALITY IN TDS(PPN)|
YEAR DRILLED!
YEAH OF INITIAL INJECTION I
TOTAL DEPTH I
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TESTl
>
59
m
z
H
6TATUSI ACTIVE
MELL DIAMETER(IN)I
PACKER!
TUBING!
DRILL STEM TESTl
CEMENT BOND LOG!
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CEMENT!
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER!
NUMBER SACKS CEMENT!
COMMENTS!IRONDALE CONTAINMENT SYSTEM INCLUDES P^
CARBON TREATMENT AND REINJECTION INTO t
JUCTION WELLS, ACTIVATED
IhAHGE NELLS.
SET ATI
SET ATI
DATE PREPANEDI 03/01/84
-------
PRINTED 10/2S/84
INVENTORY OF
COLORADO INJECTION WELLS
KItLDI 4MI. EAST OF SOMERSET
WELLNAhEl HAWKS NtST WEST AND CAST NINES
FACILITY IDt COSCUl11190A
COUNTY I GUNNISON
TWP RNG SC OTR.SEC
••• • ••• •m • •••••••»«
LOCATION I 13S-90W -11-NENWSE
NS.LINE CW.LINE
OPERATORS
WESTERN SLOPE CARBON INC,
ADDRESS I US EAST 200 SO, *0402
SALT LAKE CITY
UT	04111
CLASS/TYPE I 5X
STATUSI ACTIVE
RECEIVING FORMATION! MESAVERDE GROUP	WELL DIAMETER(IN)I
GEOLOGIC AGEI CRETACEOUS	PACKER I
INJECTION INTERVAL(FT)I EAST-5000-6000•,WEST 6190 (DN.SHAPT	TUBING!
AMOUNT Or FLUID INJECTION(BBL/NO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(P8I)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLECl
YEAR or INITIAL INJECTION!
TOTAL DEPTHI
PLUG BACK DEPTH!
GROUND ELEVATION(FT)!
MECHANICAL INTEGHITY TEST!
COMMENTS!WASTE IS MINE BACKFILL VOL. IS 88'
"O
39
m
>
53
m
>117 TlJ.
DRILL STEM TEST!
CEMENT BOND LOGI
SURFACE CASING DCPTHl
NUMBER SACKS CENCNTl
SHORT STRING DKPTHI
NUMBER SACKS CEMENT!
LONG STRING DEPTHI
NUMBER SACKS CEMENT!
SIZE Or TUBING!
NUMBER Of PACKERS!
CASING LINER!
NUMBER SACKS CEMENT!
FT/SEC.TONNAGE RATE 73-190
URY TUN/HR,, INJ.IS BY PNEUMATIC SYST
GRAVITY,TO LOWER LEVELS. INJ IS TO MEN
DATE PREPAREDl 09/08/83
MINE
NITEL FM,
-<
: BACKFILL IS INJ. UNDER
SET ATI
SET ATI
-------
PRINTED 10/23/84
INVENTORY OF
COLORADO INJECTION WELLS
FIELD I
WELLNAMEl BULLDOG - BACKFILL |1
FACILITY ID I COSMN 2342N1A
FACILITY IDI COSHN2342N1A
COUNTY I MINERAL
TWP RNS SC QTH.SEC NS.LINE EW.LINE
•••	mm
LOCATIONI 42N-1W -21°	«»
OWNER| THOMAS M, ROBERTSON
OPERaTURi THOMAS M, ROBERTSON
HOMESTAKE MINING CO.
ADDRESSl P.U. BOX 100
CREEDE
CO
81130
CLASS/TYPE I 5X
STATUS! ACTIVE
RECEIVING FORMATION I
GEOLOGIC AGE I
INJECTION INTERVAL(FT)I
AMOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLEDl
YEAR OF INITIAL INJECTIONI
TOTAL DEPTH I
PLUG BACK DEPTH I
ground elevation(ft)i
MECHANICAL INTEGRITY TEST I
COMMENTSIMILL TAILINGS BACKFILL
DATE PREPAREDl 06/20/84
123
1970
¦o
39
m
>
39
z
<
m
z
H
o
HELL DIAMETER(IN)I
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOCI
SURFACE CASING DEPTHI
NUMBER SACKS CCMENTl
SHORT STRING DEPTHS
NUMBER SACKS CEMENT I
LONG STRING DEPTH!
NUMBER SACKS CEMENTl
SIZE Or TUBING!
NUMBER OF PACKERS!
CASING blNERl
NUMBER SACKS CEMENTl
(TYPE 8) TO STcSOs - AVE SIXE 6X1SX300 FEET
SET ATI
SET ATI
-------
FIELD!
VELLNAMEl BULLDOG - WASTE DISPOSAL 12
FACILITY IDi COSMN2542N1C
FACILITY IDl COSNN2342N1C
COUNTY I MINERAL
TWP RNG SC OTR.SEC NS.LINE EW
••• mmmm mm mm
LOCATION I 42N-IW -23-NW
RECEIVING FORHATIONI FILL
GEOLOGIC AGEI
INJECTION INTERVAL(FT)I 10 - 29
AMOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)I
INJECTED H20 QUALITY IN TDSCPPMJI
YEAR DRILLED!
TEAR OF INITIAL INJECTIONl 1969
TOTAL DEPTHI 23
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I 9360
MECHANICAL INTEGRITY TEST!
COMMENTSI EFFLUENT DISPOSAL - SEPTIC
DATE PREPARED! 06/21/S4
LUliUHAUU INJtCTIUN WLLL6
LINE
OWNERl THOMAS ROBERTSON
OPERATOR! THOMAS ROBtRTSON
HOMESTAKE MINING CO,
ADDRESS! P,U, BOX 100
CREEDE
CO
SI 130
CLASS/TYPE! 5W
STATUS! ACTIVE
•v
30
m
>
DO
m
z
H
o
30
WELL DIANETEFCimi 8
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH!
NUMBER SACKS CERENT!
SHORT STRING DEPTHI
NUMBER SACKS CEMENT!
LONG STRING DEPTHI
NUMBER SACKS CEMENTI
SIZE OF TUBING I	SET ATI
NUMBER OF PACKERBI	8ET ATI
CASING LINERI
NUMBER SACKS CEMENTI
-------
PRINTED 10/25/84
FIELD!
HELLNAMEl BULLDOG - HASTE DISPOSAL 11
rACILITY IDt COSMN 2342N1B
FACILITY IDl COSMN 2542N1B
COUNTY I MINERAL
TWP RNC 8C OTA.SEC N8.LINE EM,LINE
• v* mm mm m m mmm**»~*mm mmmmmmmmm mmmmmmmm
Locationi 42n-iw -js-nw	-	-nw
RECEIVING FORMATION! TILL
GEOLOGIC AGE!
INJECTION INTERVAL(FT)I 14-34
AMOUNT OF FLUID lNJECTI0N(BBL/MO)I
CUMULATIVEl
AVERAGE INJECTION PRESSURE(PSI)I 0
FORMATION PRES3URE(P5I)|
FORMATION H20 QUALITY IN TD8(PPM)|
INJECTED H20 OUALITY IN TDS(PPM)|
YEAR bRlLLEDl
YEAR OF INITIAL INJECTION! 196!
TOTAL DEPTH I 34
PLUG BACK OEPTHl
GROUND ELEVATION(FT)I 9360
MECHANICAL INTEGRITY TESTl
COMMENTSIEFFLUENT DISPOSAL - SEPTIC WASTE
DATE PREPARED I 06/20/84
INVENTORY OF
COLORADO INJECTION HELLS
OHNCRl THOMAS M. ROBERTSON
OPERATOR I THOMAS M. ROBERTSON
HOMESTAKE MINING CO,
ADDRESS! P.O. BOX 100
CREEDE
CO	81130
•v
DO
m
CLASS/TYPE! 5H
STATUS! ACTIVE
hell diameter(In)i ia
PACKER!
TUBING!
DRILL STEM TESTi
CEMENT BOND LOG!
f~~	SURFACE CASING DEPTH!
gp	NUMBER BACKS CEMENT!
~	SHORT STRING DEPTH!
w	NUMBER SACKS CEMENT!
Long string dcptwi
¦<	NUMBER SACKS CEMENT!
—	SIZE OF TUBINCI	SET AT!
^	NUMBER OF PACKERS!	SET ATl
CASINC LINER!
NUMBER SACKS CEMENT!
m
O
30
¦<
-------
PRINTED 10/25/84
riELDl
WELLNAMEI	BULLDOG • WASTE DISPOSAL ll
FACILITY IDl	COSNN2342N1D
FACILITY IDt	COSMN2342N1D
COUNTY I	MINERAL
TWP RNG 8C OTR.SCC NS.LINE EM.LINE
• •• • ••• mm m^mmmmmmm •••••¦•¦• mmmmmmmm
LOCATION! 42N-1* -23-NW
RECEIVING FORMATION! PILL
GEOLOGIC AGE!
INJECTION INTERVAL(PT)! 10 - 23
AMOUNT OP PLUI0 1nJ(CTI0N(BBL/M0)|
CUNULATIVEl
AVERAGE INJECTION PRESSURE(PSI)I 0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPN)!
YEAR DRILLEDl
YEAR OP INITIAL INJECTION!
TOTAL DEPTH! 23
plug back depthi
CROUND ELEVATION(PT)| 9360
MECHANICAL INTEGRITY TESTl
COMMENTSlEPLUENT DISPOSAL • SEPTIC
DATE PREPAREUi 06/21/04
INVENTORY UK
COLORADO INJECTION HELLS
OWNER| THOMAS ROBERTSON
OPERATOR! THOMAS ROBERTSON
HOMESTAKE MINING CO,
ADDRESS! P.O. BOX 100
CREEDE
CO	811)0
2J
m
CLASS/TYPE! 3W
STATUS! PERMANENTLY ABANDONED AND NOT APPROVED BY STATE
WELL DIAMETER(IN)| •
PACKER!
TUBING!
T)	DRILL STEM TESTl
CEMENT BOND LOG!
J—	SURPACE CASING DEPTH!
^	NUMBER SACKS CEMENTi
—	SHORT STRING DEPTH!
^	NUMBER SACKS CEMENT!
jj	LOMG STRING DEPTHi
NUMBER SACKS CEMENT!
_	SIZE OP TUBINC!	SET ATI
Z	NUMBER OP PACKERS!	SET ATl
CASING LINER!	,
NUMBER SACKS CtNENTl
m
O
33
<
-------
PRINTED 10/25/04
P" I ELD I
WELLNAMEI TOWN or aguilar-lon income housing sewag
rACILITY lot CUSLA27 J065T
COUNTY I LAS ANIMAS
TWP RNC SC OTR.SEC NS.LINE EW.LINE
¦»• «••• mm mmmmmmmwm mmmmmmmmm mmmmmmmm
LOCATION I 30S-A3W "27-	-	•
RECEIVING FORMATION|
GEOLOGIC AGEI
INJECTION INTERVAL(rT)I
AMOUNT Or TLUIO INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURECPSI) I 0
rORNATION PRES5URE(P5I)I
rORNATION H20 QUALITY IN TDS(PPM)|
INJECTCO H20 QUALITY IN TDS
3J
m
o
33
<
-------
PRINTED 10/25/B4
INVENTURY liT
COLORADO INJECTION WELLS
FIELD I CITY UF DELTA
WELLNAMEl DELTA SEkAGE DISPOSAL WELL
FACILITY IDI CUSDL091596A
COUNTY I DELTA
THP RNG SC OTR.SEC
• •• • ••• • • •«•»•«••••«
LOCATION I 15S- 96W-9 -SEnESE
NS.LINE
EM,LINE
OWRWll STOOD*, JOHN R,
ADDRESSl BOX/MO
deuta
CO
»J*J6
CLASS/TYPE!
STATUS I
9W
ACTIVE
RECEIVING FORMATION I ALLUVIUM
GEOLOGIC AGEl OUARTERNARY
INJECTION INTERVAL(FT)I 30-40
AMOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVE I
AVERAGE INJECTION PRESSURECPSI) I	0
FORMATION PRESSURECPSI)I
FORMATION H20 QUALITY IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPM)I
YEAR DRILLEDl
YEAR OF INITIAL INJECTIONl
TOTAL DEPTHI 40"
PLUG BACK DEPTHI
GROUND ELEVATION(FT) I
MECHANICAL INTEGRITY TESTl
COMMENTSlSEWAGE DISPOSAL
DATE PREPARED I OB/31/81
-o
DO
m
>
30
-<
m
z
H
O
30
<
WELL DIAMETER(IN)I 24
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LUG!
SUHFACE CASING DEPTHI
NUMBER SACKS CEMENT!
SHORT STRING DEPTHI
NUMBER SACKS CEMENTl
LONG STRING DEPTHI
NUMBER SACKS CEMENTl
SIZE OF TUBINGI
NUMBER OF PACKERS!
CASING LINERI
NUMBER SACKS CEMENTl
SET ATI
SET ATI
-------
PRINTED 10/25/04
INVENTORY OF
COLOHAUO INJECTION HELLS
ritLOl
WELLNANEl SALIDA DISPOSAL PLANT
FACILITY IUI COSCF0949O9A
COUNTY I CHAFFEE
TWP RNG SC QTR.SEC
mmm mmmm m«
LOCATION I 49N-9E -9 -
NS.LINE EW.LINE
OWNER/OPERATORl
CITTT^T SAHUA
ADDRESSl P.O./BOi^4j7
SALJTIA
CO

CLASS/TYPE I SW
STATUS I ACTIVE
RECEIVING FORMATION I ALLUVIUM(f)
GEOLOGIC AGE I QUATERNARY
INJECTION INTERVAL(FT)I
AMOUNT OF FLUID INJECTION(BBLZMU)I
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)!
FORMATION H20 QUALITY IN TOS(PPM)l
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLEDI
YEAR OF INITIAL INJECTION!
TOTAL DEPTHI
PLUG BACK DEPTHI
GHOUND ELEVATION(FT)I
MECHANICAL INTEGRITY TESTl
COMMENTSINO INFORMATION CONCERNING WELLS,
DATE RffEPAREDl 05/24/93
¦o
m
>
50
-<
m
z
H
O
30
¦<
HELL DIAMETER(IN)I
PACKER I
TUBINGl
DRILL STEM TESTl
CEMENT BOND LOGl
SURFACE CASING DEPTHI
NUMBER SACKS CEMENTl
SHORT STRING DEPTHI
NUMBER SACKS CEMCNTl
LONG STRING UEPTHl
NUMBER SACKS CEMCNTl
SIZE OF TUBINGI
NUMBER OF PACKERSi
CASING LINER I
NUMBER SACKS CEMENT I
SET ATI
SET ATI
-------
PRINTED 10/25/84
INVENTORY OF
COLORADO INJECTION HELLS
,v FItLOl-305 MAIN ST. BOX 406
wV^LNAMCl TOWN Or toKSTCLITFE
FACILITY IDI COSCU17227 2T
COUNTY I CUSTER
TMP RNG SC OTH.SEC
LOCATION I 22S-72* -17-S*
NS.LINE EW.LINE
OWNER U HOHEOWN^ftS IN THE TOWN
ADDRESS I
HEST/^LIl*CL
CO	NU252
RECEIVING FORMATIONi ALLUVIUM
GEOLOGIC AGE| QUATERNARY
INJECTION INTERVAL(FT)I
AMOUNT or TLU1D lNJECTION{BBL/MO) I
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPH)|
YEAR DRILLEDl
YEAR or INITIAL INJECTIONS
TOTAL DEPTH I
PLUG BACK DEPTH I
GROUND ELEVATION(FT) I
MECHANICAL INTEGHITY TESTl
30
m
CLASS/TYPEI 5W
STATUSl SHUT IN {TEMPORARILY ABANDONED!
NELL DIAMETER(IN)I
PACKER I
TUBINGI
DRILL STEM TESTl
CEMENT BOND LOGl
SURFACE CASING DEPTHI
NUMBER SACKS CEHENTl
SHORT STRING DEPTHI
NUMBER SACKS CENCNTl
LONG STRING DEPTHI
NUMBER SACKS CEMENT I
SIZE OP TUttlNGl	SET ATI
NUMBER Or PACKERS I	SET ATI
CASING LINER I
r
NUMBER SACKS CEMENTl
>
30
•<
m
COMMENTSINO INFORMATION ON WELLS,
DATE PREPARED I 05/24/8)
o
30
-------
PRINTED 10/23/94
ritLDl
KELLNAMEl VTR - LONGMOnT
FACILITY IDl CUSBL112N69A
COUNTY I BOULDER
TWP RNG 5C QTR.SEC NS.LINE EH.LINE
• •• •	•m	mmmmmmmmm mmmmmmmm
LOCATION I 2N -69W -11-	-	•
RECEIVING FORMATION I
GEOLOGIC AGEl
INJECTION INTERVAL(FT)I NONE
ANUUNT OF FLUID INJECTION(BBL/NO)I
CUMULATIVKI
AVERAGE INJECTION PRESSUREtPSI>I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLED I 1982
YEAR OF INITIAL INJECTION! 1982
TOTAL DEPTH I 5200
PLUG BACK DEPTH I
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TESTl
CUMMENTSI
DATE PREPARED! 06/21/84
INVENTORY OF
COLORADO INJECTION WELLS
OWNER I BRIAN BECKER
VERTECH TREATMENT SYSTEMS, INC.
ADDRESSl 2006 W, 120TH AVE
WESTMINSTER
CO	802)4
CLASS/TYPEl SX
STATUS! ACTIVE
NELL DIAMETER(IN)I
PACKER I
TUBINGI
"U	DRILL STEM TESTl
CEMENT BOND LOGl
SURFACE CASING DEPTHl
NUMBER SACKS CEMENT!
SHORT STRING DEPTHl
NUMBER SACKS CEMENT I
LONG STRING DEPTHl
NUMBER SACKS CEMENTl
—	SIZE OF TUBINGI	SET ATI
Z	NUMBER OF PACKERS!	SET ATI
CASING LINER I
NUMBER SACKS CEMENTl
39
m
z
>
59
-<
rn
O
39
•<
-------
PRINTED 10/25/84
FILLDI
WtLLNAMEl NAHCOLITE EXPERIMENTAL TECH WELL 11
FACILITY IDI CUSHB271590A
FACILITY IDI CUSHB271596A
COUNTY I RIO BLANCO
TWP RNG SC QTR.SEC NS.LINE EM,LINE
mm «•«••••*•
LOCATION I 18 -98W -27-NWNE
RECEIVING FORMATION I
GEOLOGIC AGEl
INJECTION INTERVAL(FT)I 1822 - 1849
AMOUNT OF FLUID INJECTION(BBL/MQ)I
CUNULATIVEl
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 UUALIT* IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLEDl
YEAR OF INITIAL INJECTIONI 1983
TOTAL DEPTHI 1849
PLUG BACK DEPTHI
GROUND ELEVATION(FT)t
MECHANICAL INTEGRITY TESTl
COMMENTS INAHCOLITE BRINE RECOVERY
DATE PREPARED I 06/28/84
INVENTORY UF
COLORADO INJECTION WELLS
ONNERi ROSAR, EDWARD C,
OPERATOR| ROSAR, EDWARD C.
INDUSTRIAL RESOURCES, INC.
ADDRESfil 300 UNION BLVD. - SUITE 350
LAKEMOOD
CO	80228
CLASS/TYPE! 5X
statusi wmr
NELL DIAMETER(IN)I 5,5
PACKERl
TUBINGl
-o
JJ	DRILL STEM TESTl
PT|	CEMENT BOND LOGl
r*	SURFACE CASING DEPTHI
^	NUMBER SACKS CEMENTl'
SHORT STRING DEPTHI
NUMBER SACKS CEMENTl
59	LONG STRING DEPTHI
NUMBER SACKS CEMENT I
SIZE or TUBlNGl	SET ATI
NUMBER OF PACKERSl	SET ATI
CASING LIN£R|
KUMBER SACKS CEMENTl
>
z
<
m
O
33
-------
Printed 10/25/84
FIELD!
WELLNAMEl NAHCOLITE EXPERIMENTAL TECH HELL «2
FACILITY ID! COSRB271S98H
FACILITY ID I COSHB27169MB
COUNTY I RIO BLANCO
TWP RNG SC OTR.SEC NS.LINE EW.LINE
••• •	mm »•¦••••••	•••••••¦
LOCATION I IS -98W -27-NWNE	*
RECEIVING FORMATION I
GEOLOGIC AGE I
INJECTION INTERVAL(FT)I 1802 - 1843
AMOUNT Or rLUID INJECTION(BBL/MO)l
CUMULATIVEl
AVERAGE INJECTION PRESSURE(PSI)t	0
FORMATION PRESSURE(PSX)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLEDl
YEAR OF INITIAL INJECTlONl 1983
TOTAL DEPTHI 1843
PLUG BACK DEPTHI
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TESTl
COMMENTSINAHCOLITE BRINE RECOVERY
DATE PREPARED I 06/28/84
INVENTORY OF
COLORADO INJECTION WELLS
OWNER | ROSAH, EDWARD C,
OPERATOR I ROSAR, EDWARD C.
INDUSTRIAL RESOURCES, INC,
ADDRESSI 300 UNION BLVD. - SUITE 350
LAKEWOOD
CO	80228
DO
m
CLASS/TYPE! 5X
STATUS! ACTIVE
WELL DIAMETER(IN)I 5,9
PACKERl
"0	TUBINGl
DRILL STEM TEST!
CEMENT BUND LOGl
SURFACE CASING DEPTHI
NUMBER SACKS CEMENTl
SHORT STRING DEPTHI
NUMBER SACKS CEMENTl
LONG STRING DEPTHI
NUMBER SACKS CEMENTl
SIZE OF TUBINGl	SET ATI
NUMBER Or PACKERSI	SET ATI
CASING LINERI
NUMBER SACKS CEMENTl
>
30
<
m
O
33
-------
PRINTED 10/25/84
INVENTORY or
COLORADO INJECTICN WELLS
FIELD! TRACT C-A
WELLNAMEI RETORT i
FACILITY ID I CUSRB331399B
FACILITY IOl COSRB331S99B
COUNTY I R1U BLANCO
TWP RNG SC QTR.SEC NS.LINE EW,LINE
••• mmmm mm
LOCATION! IS -99M -33-SE	-49IFSL *1238FKL
0«NER| RICHARD LIEBER, PRES.
OPERATOR| RICHARD LIEBER, PRES,
RID BLANCO OIL SHALE CO,
ADDRESSI 2851 S, PARKER RD, • SUITE 500
AURORA
CO	10014
CLASS/TY PEI
STATUS!
RECEIVING FORMATION! GREEN RIVER/UPPER AQUIFER
GEOLOGIC AGES EOCENE
INJECTION INTERVAL(FT)I 437 • 813
AMOUNT Or FLUID INJECTION(BBL/MO)|
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I 100
FORMATION PrE55UKE(PSI)|
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY ZN TDS(PPN)|
YEAR DRILLEDl
YEAR OF INITIAL INJECTION! 1981
TOTAL DEPTH! 833
PLUG BACK DEPTH!
GROUND ELEVATION(FT)!
MECHANICAL INTEGRITY TEST!
COMMENTS! INMTU RETORT 60
50
DATE/PREPARED J 06/20/84
m
z
H
O
73
<
5X
SHUT IN 
-------
TAINTED 10/25/84
FIELD! TRACT C-A
WELLNAMEI RCTlIRT U
FACILITY ID I COSRB331S99A
FACILITY ID I CU5RBJ31S99A
COUNTY I RIO BLANCO
TriP RNC ftC QTR.SEC NS.LINE EW.LINE
• •• «•«« •m •••••••••	«¦¦¦**«•«
LOCATION I IS -99M -33-flE	-481FSL •134BPEL
OWNER I RICHARD LIEBER, PRES.
OPERATOR| RICHARD LIEBER, PRES.
RIO BLANCO OIL SHALE CO.
ADDRLSSi 28S1 S, PARKER RD, - SUITE 500
AURORA
CO	80014
CLASS/TYPE I
STATUS!
RECEIVING rORMATIONl GREEN RIVER
GEOLOGIC AGEl EOCENE
INJECTION INTERVAL(PT)I 669 - B3S
AMOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I
FORMATION PRESSURE(PSI) I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)I
YEAR DRILLEDl
YEAR Or INITIAL INJECTION! 1980
TOTAL DEPTH! 835
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TEST!
"O
JJ
m
100
z
>
30
COMMENTSlRETORT (INSITU) 30'X30'X166"
INACTIVE 12/30/80
DATE PREPARED! 06/20/B4
z
<
m
z
H
O
53
<
5X
SHUT IN (TEMPORARILY ABANDONED)
WELL DIAMETER(IN)I
PACKER!
TUBING!
DRILL STEM TCSTI
CEMENT BOND LOG!
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT I'
SHORT STRING DEPTH I
NUMBER SACKS CEMENT I
LONG STRING OEPTHl
NUMBER SACKS CCMENTl
SIZE OF TUBINGl
NUMBER OF PACKER8I
CASING LINER I
NUMBER SACKS CEMENT!
SET ATI
SET ATI
-------
/~WNTED 10/25/84
INVENTORY OF
COLORADO INJECTION WELLS
riELDI TRACT C-A
WELLNAMEI TU-J
FACILITY 101 COSRB341S99A
COUNTY I RIO BLANCO
TUP RNG SC QTR.SEC NS.LINE EH.LINE
mmmm mm »•••••••• ••••••••• *•••••»•«
LOCATIONS IS -99N -34-NESE	-3670 FSL *650 FEL
OWNERl RICHARD LIEBER, PRESIDENT
RIO BLANCO OIL SHALE CO,
ADDRESS! 2B51 S, PARKER - SUITE 500
AURORA
CO	00014



CLASS/TYPE!
STATUS!
bX
UNDER CONSTRUCTION




STATUS!
ACTIVE
RECEIVING rORMATIONI
GREEN RIVER
(UPPER
AQUITR
MeLL DIAMETER(IN)1
GEOLOGIC AGEl
EOCENE
*
¦u
ZJ
m

PACKER!
INJECTION INTERVAL(FT)1
350-500


TUBING!
AMOUNT OF FLUID INJECTION(BBL/MO)1



DRILL STEM TEST!
CUMULATIVE!


n

CEMENT BOND LOG!
AVERAGE INJECTION PRESSURE(PSI)I
0

5

SURFACE CASING DEPTHl
FORMATION PRESSURE(PSI) 1


z
.8^

NUMBER SACKS CEMENTl
FORMATION H20 QUALITY IN TDS(PPM)!
10,506 TO
90

SHORT STRING DEPTHl
INJECTED H20 QUALITY IN TDS(PPN)!
o
H
«
O
o
90
•*33

NUMBER SACKS CEMENT!
YEAR DRILLED 1


<

LONG STRING DEPTHl
YEAR OF INITIAL INJECTION!


Z
<
m

NUMBER SACKS CEMENTl
TOTAL DEPTH!
1561


SIZE OF TUBING!
PLUG SACK DEPTH!
500


NUMBER OF PACKERSl
GROUND ELEVATION(FT)I
6652

z

CASING LINER 1
MECHANICAL INTEGRITY TEST!
COMMENTSI


H
O
3J

NUMBER SACKS CEMENTl
PREPAREDl 06/20/84


<


SET ATI
SET ATI- r
-------
PRINTED 10/25/84
INVENTUKY OF
COLORADO INJtCTION WELLS
FIELD! TRACT C-A
HELLNAMEI GS-4-5
FACILITY IDl CUSRB341S99B
COUNT* I RIO BLANCO
THP RNC SC QTH.SEC NS.LINE EW.LINE
•••	mm •••••••••
LOCATION| IS -99m -J4-NH3E	-3236 F6L -3759 FtL
OWNER I RICHARD LIEBER, PRES.
RIO BLANCO OIL SHALE CO,
ADDRESSl 2851 a, PARKER RD - SUITE 900
AURORA
CO
10014


STATUS!
ACTIVE
RECEIVING FORMATION 1
GREEN RIVER
(UPPER AQU1FR
MELL DIAMETER(IN)1
GEOLOGIC AGEl
EOCENE

PACKER!
INJECTION INTERVAL(FT)1
153-726

TUBING!
AMOUNT Or rtUID 1NJECT10N(BBL/M0)1

u
DRILL STEM TEST!
CUMULATIVE 1


CEMENT BOND LOGl
AVERAGE INJECTION PRESSUKE(PSI) 1
0
rn
SURFACE CASING DEPTHI
FORMATION PRESSURE(PSI) 1

[I
NUMBER SACKS CEMENT!
FORMATION H20 OUALlTY IN TDS(PPM)I

2
SHORT STRING DEPTHI
INJECTED H20 QUALITY IN TDS(PPM)|

z
NUMBER SACKS CEmENTI
YEAR DRILLED!

>
LONG STRING DEPTH!
YEAR OF INITIAL INJECTIUN1
1978
30
NUMBER SACKS CEMENT!
TOTAL DEPTH 1
1663

SIZE OF TUHINGI
PLUG BACK DEPTH 1
726
2
NUNBER OF PACKERS!
GROUND ELEVATION(FT)1
6719
<
CASING LINER 1
MECHANICAL INTEGRITY TEST!

m
NUMBER SACKS CEMENT!


z

COMMENTSl

H

PREPARED! 06/20/84

O



30



-<

SET ATI
SET ATI
-------
PRINTED 10/25/84
INVENTORY OF
COLORADO INJECTION WELLS
FIELDl TRACT C-A
WELLNAMEI GS-6
FACILITY ID I CUSRB341S99C
FACILITY ID I CU3RB341S99C
COUNTY I RIO BLANCO
TWP RNG SC QTH.SEC NS.LINE EM,LINE
a a a a a a a a a	aaaaaaaa® aaaaaaval
LOCATION I is -99M -34-flESE	-911T8L -67FEL
OWNER| RICHARD LIEBER, PRES,
OPERATOR RICHARD LItBER, PRES,
RIO BLANCO OIL SHALE CO,
ADDRESSl 2851 8, PARKER RD. - SUITE 900
AUROHA
CO	80014


CLASS/TYPE!
STATUSI
5X
ACTIVE

RECEIVING FORMATION 1
GREEN RIVER
/UPPER AQUIFR
WELL
DIAMETER(IN)I
GEOLOGIC ACEl
EOCENE


PACKER!
INJECTION INTERVAL(FT)1
157-760
TJ

TUBINGl
AMOUNT Or FLUID INJECTION(BBL/MO)I

73
DRILL STEM TESTl
CUMULATIVCI

m
r
CEMENT BOND LOGl
AVERAGE INJECTION PRESSURE(PSI)I
0
SURFACE
CASING DEPTHl
FORMATION PRESSURE(PSI)1

|
NUMBER
SACKS CEMENTI
FORMATION H20 QUALITY IN TDS(PPM)|

z
SHORT
STRING DEPTHl
INJECTED H20 QUALITY IN TDS(PPM)|

>
NUMBER
SACKS CEMENTI
YEAR DRILLED!

73
LONG
STRING DEPTHl
YEAR OF INITIAL INJECTIONl
1978
NUMBER
SACKS CEMENTI
TOTAL DEPTH I
1781
z
SIZE OF TUBINGl
PLUG BACK DEPTHl
760
<
NUMBER OF PACKERSI
GROUND ELEVATION(FT)1
6659
m

CASING LINERI
MECHANICAL INTEGRITY TESTl

z
H
O
NUMBER
SACKS CEMENTI
COrtMENT&l



PREPARED! 06/20/84

73
<


SET ATI
SET ATI
-------
PRINTED 10/25/84
INVENTORY OF
COLORADO INJECTION WELLS
FIELD! TRACT C-A
WELLNAMEI TU-2
FACILITY ID I CUSRB321S99A
COUNTY I RIO BLANCO
TWP RNG SC OTR.SEC NS.LINE EW.LINE
• •• • ••• W «••••••••
LOCATION I IS -99W -32-NLSW	-4381 FSL -1402 FEL
OWNERS RICHARD LIEBCR, PRES.
HIO BLANCO OIL SHALE CO.
ADDRESS! 2851 S, PARKER RD. • SUITE S00
AURORA
CO	80014
COMMENTS!
DATE PREPARED! 06/20/84
"0
30
m
CLASS/TYPE!
STATUS!
RECEIVING FORMATION I GREEN RIVER (UPPER AQUIFR
GEOLOGIC AGE! EOCENE
INJECTION INTERVAL(FT)I 165-423
AMOUNT OF FLUID INJECTION(B8L/M0)|
CUMULATIVE!
AVERAGE INJECTION PRESSURECPSI)I	0
FORMATION PRESSURECPSI)!
FORMATION H20 QUALITY IN TDSCPPM)!
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLED!
YEAR OF INITIAL INJECTION! 1978
TOTAL DEPTH! 1130
PLUG BACK DEPTH! 423
GROUND ELEVATION(FT)I 6993
MECHANICAL INTEGRITY TEST!
SX
ACTIVE
>
30
-<
m
H
O
30
-<
WELL DIAMETER(IN)I 6.2
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH I 165
NUMBER SACKS CEMENT!'
SHORT STRING DEPTH!
NUMBER SACKS CEMENT!
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER!
NUMBER SACKS C&MENTl
SET ATI
SET ATI
-------
t'RImtu 10/"iS/H4
INVENTORY Lf
COLORAUU INJtCTIuN WELLS
FIELDI TRACT C-A
WELLNAMEl GS-21
FACILITY ID I C0SRB102S99B
FACILITY IUI C0SRB102S99B
COUNTY I RIO BLANCU
TriP RNG SC QTR.SEC NS,LINE EH.LINE
mmmm mm m^mmmmrnmm
LOCATION! 23 -99W •iO-SWNC -2490FSL -J5J0FEL
OWNER! HICHAHD LIECER, PRES.
OPERATOR RICHARD LIEGER, PRES.
HIO BLANCO OIL SHALE CO,
ADDRESSl 2851 S, PARKER RD, • SUITE 500
AURORA
CO	80014
CLASS/TYPE!
STATUS!
RECEIVING FORMATION! GREEN RIVER/UPPER AOUIFER
GEOLOGIC AGEI EOCENE
INJECTION IMTERVAL(FT)I 100 • 900
ANOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I 1520
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPN)|
INJECTED H20 QUALITY IN TDS(PPH)!
YEAH DRILLED!
YEAR OF INITIAL INJECTION! 1980
TOTAL DEPTH! 900
PLUG BACK DEPTH!
GROUND ELEVATION(FT)! 7180
MECHANICAL INTEGRITY TEST!
"O
30
m
z
>
30
-<
z
<
m
sx
SHUT IN (TEMPORARILY ABANDONED)
HELL DIAm£1ER(IN>I 15
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH! 100
NUMBER SACKS CEMENTl
SHORT STHING DEPTH!
NUMBER SACKS CEMENT!
LONG STRING DEPTH!
NUMBER SACKS CEMENT I
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER!
NUMBER SACKS CEMENTl
SET ATI
SET ATI
COMMENTS!INACTIVE 6/6/81
DATE PREPARED I 06/20/84
o
30
<
-------
POINTED 10/25/84
INVENTURY OF
COLORADO INJLCTIUN WELLS
ritLDI rM»CT C«A
WLLLNAMtI CS-20
FACILITY IDI COSHB102S99A
FACILITY IDI COSRB102S99A
COUNTY I RIO BLANCO
TWP RNG SC QTR.SEC NS.LINE EW.LINE
••• ¦••• •¦•¦••••• •¦•¦••••• ••••••••!
LOCATION! 25 -99W -lO-NENC -4789FSL •J21FEL
OWNER I RICHARD LIEBER, PRES.
OPERATOR I RICHARD LIEBER, PRES.
RIO BLANCO OIL SHALE CO.
ADDRESS! 2B51 S. PARKER RD, - SUITE 500
AURORA
CO	BOOM
COMMENTS!
DATE PREPARED! 06/20/04
-o
30
m
CLASS/TYPES
STATUS!
RECEIVING FORMATION! GREEN RIVER/UPPER AQUIFER
GEOLOGIC AGE! EOCENE
INJECTION INTERVAL(FT)! 100-900
AMOUNT OF FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I 1520
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)!
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLED!
YEAR Or INITIAL INJECTION! 1910
TOTAL DEPTH! 900
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I 7130
MECHANICAL INTEGRITY TEST!
5X
ACTIVE
>
30
m
z
o
30
NELL DIAMETER(IN) I 15
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH! 100
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CEMENT I
LONG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER!
NUMBER SACKS CEMENT!
SET AT!
SET AT!
-------
PRINTED 10/25/84
FltLDI LOGAN HASH
HELLNAMEl RETORT #7
FACILITY 101 CUSGR257S97B
FACILITY 101 COSGR257S97B
COUNTY I LOGAN
TNP RNG SC OTR.SEC NS.LINC CW.LINC
• •• • ••• mm
LOCATION I 7S *97H -23*	-
RECEIVING FORMATION I GRECN RJVER
GEOLOGIC AGE I EOCENE
INJECTIUN INTERVAL(FT)I
AMOUNT OF FLUID INJECTION(BBL/MO)I
CbMULATIVEl
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURECPSI)I
FORMATION H20 UUALITY IN TDMPPM)I
INJECTED H20 QUALITY IN TDS(PPM)I
YEAR DRILLEDl
YEAR OF INITIAL INJECTION!
TOTAL DEPTH I
PLUG BACK DEPTHl
GROUND ELEVATION(FT) I
MECHANICAL INTEGRITY TfcSTl
COMMENTS!
^TE PREPARED I 06/20/84
INVENTORY OK
COLORADO INJLCTION HELLS
UtfNER| RAYMOND tAHRAONIK
OPERATORl RAYMOND ZAHRADNIK
OCCIDENTAL OIL SHALE, INC.
ADDRE8SI P.O. BOX 268)
GRAND JUNCTION
CO	80302
CLASS/TYPE I SX
STATUSI ACTIVE
WELL DIAMETER(IN)|
PACKER I
^	TUBINGI
35	DRILL STEM TESTI
m	CEMENT BOND LOGl
d	SURFACE CASING DEPTHl
NUMBER SACKS CEMENTl
2	SHORT STRING DEPTHl
^	NUMBER SACKS CEMENTl
LONG STRING DEPTHl
NUMBER SACKS CEMENTl
2	SIZE OF TUBINGI	SET ATI
^	NUMBER OF PACKERSl	SET ATI
m	CASING LINER I
Z	NUMBER SACKS CEMENTl
H
O
39
39
-<
-------
PRINTED 10/25/84
FltLOl LOGAN WASH
WELLNAMEl HETORT (8
FACILITY ID! COSGr257S97C
FACILITY IUI COSGF2S7S97C
COUNTY I LOGAN
TWP RNG SC GTR.SEC N6.LINE EW.LINE
• ••» * m «•••••••* •••••••••
LOCATION| 7S -97W -25-
RECEIVING FORMATION I GREEN RIVER
GEOLOGIC AGE! EOCENE
INJECTION INTERVAL(FT)!
AMOUNT OF FLUID INJECTION(BBL/MO)I
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I	0
formation pressure(psi)i
FORMATION H30 QUALITY IN TDS(PPM)I
INJECTED H20 QUALITY IN TDS(PPM)!
YEAR DRILLEDI
YEAR OF INITIAL INJECTION!
TOTAL DEPTH!
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TEST!
COMMENTS I
DATE PREPAREOl 06/21/84
INVENTORY OK
COLORADO INJECTION WELLS
OWNERj RAYMOND ZAHRADNIK
OPERATOR! RAYMOND ZAHRADNIK
OCCIDENTAL OIL SHALEt INC,
ADDRESS! P.O. bOX 2687
GRAND JUNCTION
CO	80502
CLASS/TYPE! !>X
STATUSl ACTIVE
WELL DIAMETER(IM)I
PACKER I
TUBING!
TJ
DRILL STEM TEST!
m	CEMENT BOND LOG!
I"	SURFACE CASING DEPTH!
^	NUMBER SACKS CEMENT!
^	SHORT STRING DEPTH!
^	NUMBER SACKS CEMENTl
3Q	LONG 5TRING DEPTH!
-<
rn
z
H
O
53
NUMBER SACKS CEMENT!
SIZE OF TUBING!	SET ATI
NUMBER OF PACKERS!	SET AT!
CASING LINER!
NUMBER SACKS CEMENT!
-------
I	*£p tv/*w/8<9
FIELD! LOGAN MASH
WELLNAMEI RETORT $6
FACILITY ID! COSCF2S7S97A
FACILITY 101 COSGF237S97A
COUNTY! GAKFIELD
TWP RNG SC OTR.SEC NS.LINE EW.LINE
•••• ••
LOCATION| 7S -97W -25-
RECEIVING FORMATION| GREEN RIVER
GEOLOGIC AGE I EOCENE
INJECTION INTERVAL(FT)I
AMOUNT OF FLUID INJECTION(BBL/MO)t
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)!
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)I
YEAR DRILLED!
YEAR OF INITIAL INJECTION!
TOTAL DEPTHI
PLUG BACK DEPTHI
CROUND ELEVATION(FT)I
MECHANICAL INTEGRITY TEST!
COMMENTS!
DATE PREPARED I 06/21/64
INVENTORY OF
COLORADO INJECTION NELLS
OWNER! RAYMOND ZAHRADNIK
OPERATOR! RAYMOND ZAHPADNIK
OCCIDENTAL OIL SHALE, INC.
ADDHLSSl P.O. BOX 2687
GRAND JUNCTION
CO	80502
CLASS/TYPE! bX
STATUS! ACTIVE
¦0
DO
m
m
z
H
O
J3
HELL DIAMETER(IN)I
PACKER I
TUBING!
DRILL STEM TEST!
CEMENT BOND LOGl
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT!
SHORT STRING DEPTHI
NUMBER SACKS CEMENTI
>
3J	LONG STRING DEPTHI
NUMBER SACKS CEMENTI
SIZE OF TUBING!	SET ATI
NUMBER OF PACKERSI	SET ATI
CASING LINERI
NUMBER SACKS CEMENTI
-------
PRINTED 10/25/84
INVENTORY OF
COLORADO INJECTION HELLS
FltLDI TRACT C-B
NELLNAHCI 11* - 18
FACILITY ID I COSKB18 3S97A
FACILITY IDI COSHU1tf]59 7A
COUNTY I R1U BLANCO
TMP RNG SC OTR.SEC NS.LIhE EW.LINE
•••• •• •••••«•¦«
LOCATION I 35 -97W -18-NWNU
OWNERl ZAHHADNIK, RAYMOND R. PRESIDENT C CEO
OPERATOR I ZAHHADNIK, RAYMOND R. PRESIDENT C CEO
CATHEDRAL BLUFFS OIL CO
ADDRESSl STAR RT PICEANCE CREEK
RIFLE
CO	11650
CLASS/TYPE I SX
STATUSI SHUT IN ((TEMPORARILY ABANDONED)
COMMENTS!INACTIVE IN JULY, 1983
DATE PREPARED! 06/20/84
"O
30
m
RECEIVING FORMATION I GREEN RIVER (LPC2, LPC3)
GEOLOGIC AGEI 5EOCENE
INJECTION INIERVAL(FT)I 1100-1770
AMOUNT Or FLUID INJECTION(BBL/MO)I
CUMULATIVEI
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLEDI
YEAR OF INITIAL INJECTIONl 1981
TOTAL DEPTH! 1770
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I 6940
MECHANICAL INTEGRITY TEST!
>
30
m
O
-<
HELL DIAMETER(IN)I 6.2
PACKER!
TUBINGl
DRILL STEM TESTI
CEMENT BOND LOCI
SURFACE CASING UEPT^I
NUMBER SACKS CEMENTl
SHORT STRING DEPTHI
NUMBER SACKS CEMENTl
LONG STRING DEPTHI
NUMBER SACKS CEMENTl
SIZE OF TUBINGl
NUMBER OF PACKERSI
CASING LINERI
NUMBER SACKS CEMENTl
SET ATI
SET ATI
-------
PRINTED 10/25/84
INVKNTORY OF
COLORADO INJECTION WELLS
FIELD! TRACT C-B
WELLNAMEl 22X17
FACILITY IDI COSKR173S97A
FACILITY IDI COSHB17 3597A
COUNTY I RIO BLANCO
T*P RNG SC QTR.5EC
••• •••¦ ••
LOCATION I 3S *97U -17-
NS.LINE EM,LINE
OWNER I RAYMOND ZAHRADNIK, PRESIDENT t CEO
OPERATOR I RAYMOND ZAHRADNIK, PRESIDENT £ CEO
CATHEDRAL BLUFFS OIL 5HALC CO,
ADDRESS! STAR RT.# PECEANCE CREEK
RIFLE
CO	81650
TJ
30
m
CLASS/TYPEI
STATUS!
RECEIVING FORMATION I GREEN RIVER (LPC2, LPC3)
GEOLOGIC AGEl EOCENE
INJECTION INTERVAL(FT)I 1027 - 1962
AMOUNT Or FLUID INJECTION(UBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(P5I)I 0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TD3(PPH)|
YEAR DRILLED! 1911
YEAR Or INITIAL INJECTION!
TOTAL DEPTH! 1562
PLUG BACK DEPTH!
GROUND ELEVATION(FT)I 6939
MECHANICAL INTEGRITY TEST!
>
33
¦<
m
COMMENTS I UNSTRUCTURED 7/81, NEVER USED
DATE PREPARED! 07/13/84
H
O
35
sx
SHUT IN {TEMPORARILY ABANDONED)
HELL DIAMETER(IN)| 6,1
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH!
NUMBER SACKS CEMENT!
SHORT STRING DEPTH!
NUMBER SACKS CEMENTl
LONG STRING OEPTHl
NUMBER SACKS CEMENTl
SIZE OF TUBING!
NUMBER OF PACKERS!
CASING LINER!
NUMBER SACKS CEMENTl
SET ATI
SET ATI
-------
PRINTED 10/25/84
INVENTORY UF
COLORADO INJECTION WELLS
FIELDS TRACT C-B
WELLNAHEl 24X - 17
FACILITY ID I COSRB173S96A
FACILITY ID I COSRB173S96A
COUNTY I RIO BLANCO
TUP RNG 3C QTR.SEC NS.LINE EU.LINE
mmm •	mmmmmmmmm
LOCATION I )S -96* -17-0E5W
OWNER| RAYMOND ZAHRADNIK, PRESIDENT i CEO
OPERATOR I RAYMOND ZAHRADNIK, PRESIDENT ft CEO
CATHEDRAL BLUFFS SHALE OIL CO,
ADDRESS! STAR RT« » PICEANCE CREEK
RIFLE
CO	816S0
T5
30
m
CLASS/TYPE I
STATUS!
RECEIVING FORMATION| GREEN RIVER CLPC3, LPCJ)
GEOLOGIC AGEl EOCENE
INJECTION INTERVAL(FT)I 1022 - 1602
AMOUNT Or TLUID INJECTIONCBBL/HO)I 300
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)t	0
FORMATION PRESSURE(PSZ)I
FORMATION H20 QUALITY IN T0S(PPM)|
INJECTED H20 QUALITY IN TDS(PPM)|
YEAR DRILLEDI 1981
YEAR Of INITIAL INJECTION!
TOTAL DEPTHI 1602
PLUG BACK DEPTH!
GROUND ELEVATIONCTT)! 6992
MECHANICAL INTEGRITY TEST!
>
30
Z
<
m
COMMENTStCONSTRUCTCD 7/81, NEVER USED
DATE PHEPAREDl 06/20/84
H
O
30
sx
SHUT IN ((TEMPORARILY ABANDONED)
WELL DIAMETER(IN)I 6,1
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING UlPTHI
NUMBER SACKS CEMENT!
SHORT STRING DEPTHI
NUMBER SACKS CEMENT!
LONG STRING DEPTHI
NUMBER SACKS CEMENTl
SIZE Of TCBINGI
NUMBER or PACKER8I
CASING LINER!
NUMBER SACKS CEMENT!
SET ATI
SET AT!
-------
PRINTED 10/25/84
FIELD! PICEANCE CREEK ROUTE
WELLNAMEI EQUITY UIL - BX IN-SITU OIL SHALE PROJEC
FACILITY IOt COSRB063S98A
COUNTY I RIO BLANCO
TWP RNG SC OTR.SEC NS,LINE EM,LINE
• ••	mm •••»••••• mmmmmmmmm mmmmmmmm
LOCATION| JS -9SW -6 -	-	•
RECEIVING FORMATION I GREEN RIVER
GEOLOGIC AGE I TERTIARY
INJECTION INTERVAL(FT)I
AMOUNT OF FLUID INJECTION(BBb/MO)I
CUMULATIVE I
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(P6I)I
FORMATION H30 QUALITY IN TDS(PPM)|
INJECTED H20 QUALITY IN TDS(PPH)I
YEAR DRILLED I
YEAR OF INITIAL INJECTIONI
TOTAL DEPTHS
PLUG BACK DEPTHI
GROUND ELEVAT10N(FT)I
MECHANICAL INTEGRITY TESTl
COMMENTS|20 WELLS ON SITE
DaTE PREPAREDt 05/16/83
INVENTORY OF
COLORADO INJECTION WELLS
OWNER| U.S. ENERGY RESEARCH AND DEVELOPMENT ADM
LARAMIE ENERGY RESEARCH CENTER
ADDRES8I P.U. BOX 3)95
LARAMIE
MY	82071
CLASS/TYPEI	5X
STATUSl	ACTIVE
STATUSI	SHUT IN {TEMPORARILY ABANDONED.)
HELL DIAMETER(IN)I
PACKER I
TUBINGI
^0
jyj	DRILL STEM TESTl
I™	CEMENT BOND LOGl
gp	SURFACE CASING DEPTHI
—	NUMBER SACKS CEMENTl
z
w	SHORT STRING DEPTHI
JJ	NUMBER SACKS CEMENTl
¦<	LONG STRING DEPTHI
mm	NUMBER SACKS CEMENTl
^	SIZE OF TUBINGI SET ATI
M	NUMBER OF PACKEHSl SET ATI
m
2	CASING LINERI
"H	NUMBER SACKS CEMENTl
o
3J
-------
PkjniED 10/25/84
INVENTORY OF
COLORADO INJECTION MELLS
FltLUI
VELLHAMtl PICEkNCt CREIK BASIN
FACILITY IUI COSHB2B1S97A
COUNT!I RIO BLANCO
TWP RNG 3C OTR.SEC
• •• «••• mm
LOCATION I IS -»7N •2««SW
NS.LINE EW,LINE
OPERATOR! IReaoN, A,T,
SHELL OIL COMPANY|SPECIAL PROJECTS DEPT.
ADDRESSI 1700 BROADWAY
DENVER
CO	80202
RECEIVING FORMATION I GREEN RIVER?
GEOLOGIC AGEI TERTIARY
INJECTION INTERVAL(FT)I II33 TO 1500
AMOUNT OF FLUID INJECTION(BBL/MO)I
CUMULATIVE!
AVERAGE INJECTION PRESSURE(PSI)I	0
FORMATION PRESSURE(PSI)I
FORMATION H20 QUALITY IN Tl>S(PPN)|
INJECTED H20 QUALITY IN TD3(PPM)|
YEAR DRILLED!
YEAR OF INITIAL INJECTION!
TOTAL DEPTH! 1500
PLUG BACK DEPTH!
GROUND ELEVATION(FT)! 6082
MECHANICAL INTEGRITY TEST!
CLASS/TYPE! SX
STATUS! PERMANENTLY ABANDONED AND APPROVED BY STATE
NELL DIANETER(IN)I
PACKER!
TUBING!
DRILL STEM TEST!
CEMENT BOND LOG!
SURFACE CASING DEPTH I 7" « 1133
NUMBER SACKS CEMENT! TO A
SHORT STRING DEPTH I
NUMBER SACKS CfcMENTl
LUNG STRING DEPTH!
NUMBER SACKS CEMENT!
SIZE OF TUBING! 3.5 SET AT!
NUMBER or PACKERS! 1	SET ATI 1127
CASING LINER!	r
NUMBER SACKS CEMENT!
¦V
SJ
rn
z
>
30
m
C0MHENTSI5ET BRIGE PLUG AT 1062 AND CHECKED SETT^O SACK CEMT, CLASS H FROM 70#
TO SURFACE , NELDED PLATE TO SURrACE t^K COMPLETE 8/83
DATE PREPARED t 07/13/64
30
<
-------
APPENDIX D
Status of Each Inventoried Well:
Initial, Revised, and Final Inventories
The site, type, and status of each well on the initial
inventory is list and tracked through the revised to the final
inventory.
-------
Well Name, Site or Owner; Type; Number of Wells; Status	Reason for Change
Preliminary Inventory (Howard, 1984) Final Inventory (SMC Martin, 1985) (if any)
Western Plastics Corporation
VA (heat pump return flow)
1 Active
Stewart Heat Pump Well II
VA (heat punp return flow)
1 Active
Stewart Heat Pump Well #2
VA (heat pump return flow)
1 Active
Noffsinger Manufacturing Co.
VA (cooling water return flow)
1	Active
Chatfield Elementary School
VD (root drainage disposal)
2	Active
Hawk's Nest Mine
VX (mine backfill)
1 Active
Bulldog Mine
VX (mine backfill)
1 Active
No Well
CharleB Staley
VA (heat pump return flow)
1 Active
"Owner" (heat pump pipe
manufacturer) indicated no
heat pump at site.
Stewart Drilling, who installed
this well, provided name of
owner, who was contacted.
Ralph Watt
VA (heat pump return flow)
1 Active
Same as above.
No Change
No Change
Hawk's Nest Mine
VX (mine backfill)
1 Temporarily Abandoned
Owners of mine indicated that
operations had been closed down
at Hawk's Nest coal mine in 1983.
No Change
Bulldog Mine
VW (effluent disposal)
2 Active, 1 Permanently Abandoned
No Wells
Operators of mine said that these
'wells' were septic tanks that
fed leach fields.
-------
Well Name, Site or Owner; Type; Number of Wells; Status	Reason for Change
Preliminary Inventory (Howard, 1984) Final Inventory (SMC Martin, 1985) (if any)
Town of Westcliffe
VW
1 Temporarily Abandoned
Salida Disposal Plant
VW
1 Active
Delta Sewage Disposal Well
VW (Sewage Disposal)
1 Active
Aguilar, Low Income Housing
VW (sewage disposal)
1 Temporarily Abandoned
Indian Springs Greenhouse
VA (geothermal return flow)
1 Active
No Well
No Well
No Well
No Well
No Change
County health department
contacts indicated no disposal
well for waste disposal.
Contacts in City of Salida
government indicated that no
such well existed.
Contacts in Delta town government
and John Stoudy (listed as
'owner' on original inventory)
determined that this well is an
abandoned extraction well.
Contact with town officials
indicated that this septic
tank fed to leach trenches.
No Well
Villa Mall
5A (Geothermal Return Flow)
1 Active
Contact with owner/operator
confirmed this well.
VTR - Longmont
VX (experimental technology)
1 Active
Not an injection Well
Removed from inventory by
direction of Region VIII EPA
office; well is a closed r 1
system and does not inject.
-------
Well Name, Site or Owner; Type? Numb
Preliminary Inventory (Howard, 1984)
Nacholite Experimental Wells
VX (experimental technology)
2 Active
of Wells; Status
Final Inventory (SMC Martin, 1985)
Nacholite Experimental Wells
VX (experimental technology)
2 Temporarily Abandoned
Reason for Change
(if any)
Contact with owner/operator
indicated that these wells are
now shut down.
Shell Oil Shale Oil Project
VX (experimental technology)
1 Permanently Abandoned
Equity Oil, BX Project
VX (experimental technology)
1 Active
No Change
Equity Oil, BX Project
vx (experimental technology)
8 Temporarily Abandoned
Project report obtained from
Equity detailed the BX project,
including the 8 wells. Project
is now shut down.
CB Shale Oil Project
VX (experimental technology)
3 Temporarily Abandoned
Occidental Oil Shale Project
VX (experimental technology)
3 Active
No Change
No Change
Rio Blanco Oil Shale Co. Project
VX (experimental technology)
4 Active, 3 Temporarily Abandoned,
1 Under Construction
Rocky Mountain Arsenal
VR (aquifer recharge)
59 Active, 21 Under Construction
Shell Oil Irondale System
VR (aquifer recharge)
1 Active
Rio Blanco Oil Shale Co. Project
VX (experimental technology)
2 Active, 6 Temporarily Abandoned
Rocky Mountain Arsenal
VR (aquifer recharge)
59 Active
Shell Oil Irondale System
VR (aquifer recharge)
22 Active
Contact with owner detailed
status of wells.
Contact with people in the
Arsenal revised the number and
status of the wells. r
Sources at Shell and the Arsenal
provided the information for
the number of wells.
-------
APPENDIX E
Review of Chemigation in Colorado
-------
COLORADO DEPARTMENT OF HEALTH
MEMORANDUM
TO:
Invitees to
Colorado Chemigation Meeting
FROM: Colorado Department
DATE: 5/18/84
Enclosed is a copy of the background {taper regarding chemigation which
was developed by a chemigation task group. The paper will provide the
basis for discussion at the meeting on May 31. The meeting will be
limited to two hours. We encourage your input, suggestions and advice
and look forward to meeting with you. Thank you for your
consideration.
If you have any questions please call Mary Gearhart at 320-8333
extension 3458.
4210 EAST 11TH AVENUE DENVER,COLORADO 80220 PHONE (303) 320-8333
E-l
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5/18/84
CHEMIGATION: Issues and Options
DRAFT
SUMMARY
In the last 12-18 months, considerable attention has been focused on
our ground water resource and how various activities do or can impact
those resources. In Colorado, there is a growing question among
ground water users in agricultural areas about contamination (existing
or potential) of the ground water due to agricultural practices.
The question was initially raised in regard to nitrates, which are
found in commercial fertilizers. With the increase In the number of
other chemicals used for pest control and weed control, the scope of
the issue appears to have expanded. Nitrate is an inorganic chemical
for which a maximum contaminant level (MCL) in drinking water has been
established at 10.0 mg/1 as nitrogen (parts per million).
Historically, an elevated nitrate level In ground water in and around
agricultural areas has been due to non-point source percolation of the
fertilizer down into the aquifer. However, a relatively new chemical
application method has provided a direct connection betweeen the
ground water and agrichemlcals, which includes commercial
fertilizers. The method is called "chemlgation" and it utilizes a
standard center pivot irrigation system to apply agrichemlcals to the
crops. The center pivot systems are connected to water wells and,
because the systems were initially designed to move water only, there
are no safety precautions required to keep the agrichemlcals from
being discharged into the ground water through the well head.
Most of the pesticides used for agricultural purposes are not limited
in the drinking water regulations. There are on-going studies by EPA
to determine the potential health hazards due to those chemicals.
Because of the chance for direct contamination of the ground water,
the agricultural community has approached the High Plains Technical
Coordinating Committee to research the Impacts to ground water of
chemlgation and to provide technical, regulatory and educational
options for minimizing the risk of contamination from this practice.
This document will summarize the issues associated with chemlgation
and the options for dealing with the Issues.
E-2
-------
OVERVIEW OF CHEMIGATION
Geographic
Figure 1 (attached) Is a schematic diagram of the mechanical
modifications which make a center pivot system useable for
chemlgatlon. The valves and piping shown on this diagram are
not required but are suggested by some Injection unit
manufacturers as safety devices. Figure 2 (attached);ls a
schematic diagram of a chemical Injection unit.
In Colorado, chemlgatlon is practiced quite extensively in
the north and central eastern plains (referred to as the High
Plains area of the Ogallala aquifer), in the San Luis Valley,
and it will also be used in the San Juan Basin. In 1983, six
northeastern Colorado counties irrigated approximately
500,000 acres of cropland through some mechanical means. Of
this amount, 48,000 acres were treated with three
agrlchemlcals which were labelled for chemlgatlon. It is
projected that in 1984 the amount of acreage in those six
countleB which will be treated via chemlgatlon will Increase
by five hundred percent to about 250,000 acres. (Reference:
CSU Extension Service, Akron, CO.)
Based on 1983 Information from the State Engineer's Office,
there were about 4600 wells permitted for irrigation in those
same six counties. Because each well could be mechanically
modified for chemlgatlon, each well 1b a potential
contamination source. It Is Important to note here that if
one gallon of fertilizer were spilled into an aquifer, it
could Increase the nitrate level to 10 mg/1 (the Drinking
Water Standard) in 100,000 gallons of water. The compound
effect of all the irrigation wells could be very
significant. The trend 1b towards increased use of
chemlgatlon In Colorado.
The people who use ground water for Irrigation and drinking
water do so because it Is the only water available at a
reasonable cost. (Most of the private wells for household
use in agricultural areas are drilled Into the same water
source as the irrigation wells.) It is essential to be aware
of the potential for contamination and to be responsive to
the needs of the agricultural community by improving
chemlgatlon and reducing the risk to the environment and to
public health.
E-3
-------
Why Chemigation Is Used
Many states have conducted research concerning chemigation and have
found that there are two basic reasons for using chemigation. The
first is a practical cme. It allows the farmer to apply the chemicals
to the crops at the sane time as Irrigation Is accomplished, thereby
reducing the time required to do both. The second reason Is
economics. In today's market a farmer could save about $4.50 per acre
per year using the center pivot system for chemical application
instead of other traditional methods. One reason for the cost savings
is that the chemicals are applied uniformly to the crops and
misapplication to some areas is avoided. Chemigation is a viable,
practical method for agricultural use. If certain precautions were
taken to prevent direct ground water contamination the benefits to the
farmer could far outweigh the risks
Some of the potential difficulties associated with chemigation are
related to environmental concerns. One, of course, is the direct link
to ground water through the well head. Other problems are associated
vlth the misapplication of agrichemlcals because of peculiarities in
the sprinkler Bysteo equipment. The specific studies which provide
the background for this paper are listed in the attached bibliography.
STATUTORY AND REGULATORY CONSIDERATIONS
The method of chemigation is not specifically regulated by the
federal government. However, several federal laws regulate the
use of the chemicals. These laws are primarly environmental laws
and are discussed below. The enforcement of all or part of these
laws has been delegated to the State and the discussion describes
the delegations.
A. FIFRA [Federal Insecticide, Fungicide & Rodenticide Act, 1947
(amended by the Federal Pesticide Act in 1978)]
1. FIFRA regulates pesticides, Including those used for
agriculture. All pesticides must be registered with
EPA. EPA also has the authority to classify a pesticide
or certain uses of it as restricted and/or ban a
pesticide and certain uses of it. Under FIFRA,
directions for use are required to be on a pesticide
label. These directions include: 1) the sites of
application and associated target pests, 2) the dosage
rate associated vlth each site and pest, and 3) the
method of application, including instructions for
dilution.
The 1978 Federal Pesticide Act amended the FIFRA so that
a method of application may be used unless It Is
specifically prohibited on the label. This had the
effect of allowing many more peBtlclde6 to be applied
through center pivot irrigation systems than those which
were labelled for this use.
E-4
-------
Prior to passage of the 1978 amendment, there were only
six herbicides registered for use In c.p. systems and
one insecticide.
Since 1978, six additional pesticides have been
registered for chemigation use. Many chemical companies
are actively marketing pesticides for use in chemigation
because that use has not been specifically prohibited or
restricted.
FIFRA does not provide authority to inspect application
equipment but It does have provisions regarding misuse.
2. Colorado currently licenses only for hire applicators of
agrlchemlcals. The state has no authority to regulate
private applicators. The program Is boused in the
Colorado Department of Agriculture, Pesticide Section.
The authority is through the Colorado Pesticide
Applicator's Act.
B. CERCLA [The Comprehensive Environmental Response,
Compensation and Liability Act of 1980 (Superfund)]
1.	CERCLA Is designed to deal vlth emergency chemical
releases. CERCLA states that:
No person (including the United States or any state) may
recover under authority of this section for any response
costs or damages resulting from application of a
pesticide product registered under the Federal
Insecticide, Fungicide and Rodentlclde Act.
Under this act, the release of hazardous substances in a
reportable amount (one pound or the amount identified in
section 311(b)(4) of the Federal Water Pollution Control
Act) oust be reported to the National Response Center.
This Beans that one pound of certain agrlchemlcals
should be reported when spilled. Splll6 Include
backflov Into water wells.
2.	Colorado has not assumed the Superfund program as yet.
E-5
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C.	FWPCA [Federal Water Pollution Control Act]
1.	The FWPCA lists a number of chemicals as hazardous.
Some of these are registered pesticides. Under FWPCA,
the person responsible for contaminating the vater with
one or any of those chemicals is liable for all cleanup
costs. Although CERCLA has replaced the FWPCA as the
enforcement tool for any environmental damage, FWPCA can
be specifically applied to the Injection of fertilizers
into surface vater.
2.	Colorado has assumed the functions of the Federal Water
Pollution Control Act. The Colorado Department of
Health administers the program through the Water Quality
Control Division (WQCD) under the authority of the
Colorado Water Quality Control Act (WQCA). Although the
WQCA was designed to protect ground water (in addition
to surface waters) from pollution, no specific
regulations are in place for accomplishing that
function. A co-ordinated ground water protection plan
Is expected to be endorsed by the Water Quality Control
Commission in 1984. The program will be
prevention—based and will be designed to protect
beneficial uses.
D.	RCRA [Resource Conservation and Recovery Act of 1976]
1.	This law deals with hazardous waste disposal. This law
has generally been used to address ground water
contamination due to hazardous waste disposal and Is not
easily extrapolated to chemlgation.
2.	Colorado is expected to have full delegation of the RCRA
program during 1984 but 1b not expected to address
chemlgation specifically. The program will be housed
with the Waste Management Division of the Colorado
Department of Health.
E.	SDWA [Safe Drinking Water Act of 1974]
1. Under SDWA, public water supplies are required to
monitor the water at the tap. A public water supply is
one having at least 15 service connections or regularly
serving at least 25 individuals.
SDWA also authorizes underground injection control
programs (UIC). Since the State of Colorado has not
been authorized to assume the U1C program for four of
the five classes of wells, the Environmental Protection
Agency (EPA) has promulgated a federally-administered
program for those four classes. One of the U1C
classifications for injection well6 is Class'IV,
"Hazardous and Radioactive Wastes Injected Into or Above
Fresh Water," which EPA has proposed to ban.
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2. The Drinking Water Section in the Colorado Department of
Health administers the Safe Drinking Water Act under the
general public health statutes. Although the Safe
Drinking Water Act regulates water purveyors, Article 11
of the Colorado Primary Drinking Water Regulations
prohibits hazardous cross-connections In public-water
systems. The section provides for annual inspection of
¦echanical devices that protect systems from
cross-connections.
OPTIONS
The most important aspect of the issues regarding chemigation is that
the proper equipment changes the risk of contamination from a
potential problem to a preventable problem. Recommendations for
equipment used in chemigation are listed below.
The letters in parentheses refer to Figure 1.
A. Irrigation system equipment standards
l.(F&B) The irrigation system should be equipped with an
anti-back syphon (check valve) and vacuum relief
breaker. This valve will prevent back flow from
entering the well. The valve should be located
between the well and the injection point on the
naln pipe. It should be constructed or coated with
corrosion relstant material. The seal should be as
chemically resistant as possible and it should be
replaceable. The entire valve should be installed
so that frequent inspection and parts replacement
can be done with minimal effort. The valve should
be either diaphragm-activated by hydraulic line
pressure, spring loaded or weight loaded to provide
drip tight closure. The spring or weight loading
should be sufficient to hold at least one pound per
square inch in the direction of flow. Also a drain
valve should be located at the lowest point ahead
of the check valve.
2.00 The irrigation pumping plant and the chemical
injection pump should be Interlocked so that if the
irrigation pumping plant stops the chemical
injection pump also stops. This will prevent the
filling the entire irrigation pipeline with the
chemical mixture from the supply tank. The
sprinkler should be operated on the automatic
setting.
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3.(M) A check valve in the chemical injection line is
needed to 8top flow of water from the irrigation
system into the chemical supply tank. If this
check valve were omitted or malfunctioned and the
injection pump stopped, irrigation water could flow
back through the chemical line into the chemical
supply tank, overflowing the tank and causing a
spill around the irrigation well.
B. Chemical injection equipment standards
The letters in parentheses refer to Figure 2.
1.(7)	The pump's accuracy is critical. It should be able
to pump with less than 1Z error in rate. It should
show a great deal of resistance to chemical
breakdown and allow precision and dependable flow
rate adjustment. It should allow adjustment
without disassembly of equipment which could result
In spills.
2.(Q,X,S)	The chemical nurse tank should be completely
dralnable for cleaning, etc. It should be a closed
system - air vented but sealed to prevent outside
contamination. The tank should have as much
resistance to chemicals and structural damage
(puncture and collision) as possible.
3.(0,U,W)	Fittings, hoses, filters, and seals should
demonstrate a high degree of chemical and
structural damage resistance. Explanation: Teflon
and nylon are both rated as the most chemical
resistant material while P.V.C. (polyvinylchloride)
shows less resistance. They should allow maximum
pressure of system with a built in safety factor
for transient high pressure. They should have a
size and capacity rating to facilitate the
equipment and application volume.
4.(T)	On-off valves should be accurate and reliable (no
leakage). They should be able to withstand the
maximum pressures of the system. Again they Bhould
be chemical and structural damage resistant.
5.(P)	The calibration devise should allow precision
measuring accuracy.
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The protection of Irrigation water supplies requires
several separate pieces of safety equipment. It is not
adequate to choose only one or tvo from the list
previously discussed. Rather, the proper protection of
an Irrigation water supply requires the use of all of
the pieces of safety equipment. Chemlgatlon safety Is
dependent on the right equipment regularly maintained.
C. Conclusions
Chemlgatlon can be a safe, economical method for application
of chemicals. There are questions, however, that can best be
answered by the agricultural community so that the best
available protection is afforded. Those questions are:
*	How can the state best serve the needs of all three
groups?
*	Should a concentrated effort be made to develop
equipment standards?
*	Are the suggestions made for equipment improvements
acceptable and will they prevent environmental
hazards?
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ATTACHMENT 2
Bibliography
1.	Todhunter, John A., Ph.D. (author)1984. Regulatory and Safety
Considerations In Chemigation. A report to the Chemigation
Committee of the NAAA.
2.	Upper Republican Natural District, Nebraska 1984. Rule 5:
Application of Agricultural Chemicals through Ground Water
Irrigation Systems.
3.	Young, J.R. (editor) 1981. Proceedings of the National Symposium
on Chemigation. Sponsored by Univ. of Georgia, College of
Agriculture, Coastal Plain Experiment Station, Coop. Ext.
Ser./Rural Development Center, Tifton, Georgia. Aug. 20-21, 1981.
4.	Young, J.R. and D.R. Sumner (editors) 1982. Second National
Symposium on Chemigation. Sponsored by Univ. of Georgia College
of Agriculture, Coastal Plain Experiment Station, Coop. Ext. Ser./
Rural Development Center, Tifton, Georgia. August 18-19, 1982.
The following references are specific papers within the above
symposium proceedings that have specific lnformat on as to equipment
for chemigation.
5.	Book, J.E. 1981. Coordination of Irrigation and Chemigation.
Proceedings of National Symposium on Chemigation. Rural
Development Center, Tifton, Georgia, p. 96-103.
6.	Stansell, James R. 1981. Chemigation Injectors: Selection,
Calibration and Use. Proceedings of National Symposium on
Chemigation. Rural Develop Center, Tifton, Georgia, p. 103-109.
7.	Harrison, Kerry A. 1981. Why Use Chemigation. Proceedings of
National Symposium on Chemigation. Rural Development Center,
Tifton, Georgia, p. 109-113.
8.	Davis, Claude-Leonard. 1981. Liability Considerations in
Chemigation. Proceedings of National Symposium on Chemigation.
Rural Development Center, Tifton, Georgia, p. 113-120.
9.	Threadgill, E.D. 1982. Chemigation—Why Its Use Is Growing.
Proceedings 2nd National Symposium on Chemigation. Rural
Development Center, Tifton, Georgia, p. 1-4.
E-10
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10.	Helkes, Eugene. 1982. Application of Herbicides Through Center
Pivot Sprinkler Systems. Proceedings of 2nd National Symposium on
Chemigation. p. 74-80.
11.	Harrison, D.S. 1982. Selection, Operation, Calibration and
Maintenance of Chemigation Equipment. Proceedings of 2nd National
Symposium on Chemigation. p. 74-80.
12.	Fishbach, P.E. 1982. Applying Chemical Through Irrigation
Systems: Safety and Environmental Considerations. Proceedings
2nd National Symposium on Chemigation. p. 80-88.
13.	Kundell, J.E. and L.A. Warner. 1982. Legal Aspects of
Chemigation. Proceedings of 2nd National Symposium on
Chemigation. p. 88-95.
Other References...
14.	ASAE Engineering Practice: ASAE EP409. Safety Devices for
Applying Liquid Chemicals Through Irrigation Systems. Adopted and
published by American Society of Agricultural Engineers, St.
Joseph, Michigan. January, 1981.
15.	Raun, E.S. 1979. Pest Management using Center Pivots. Irrigation
Age. May-June, 1979 p. 17-18.
16.	Larsen, Ron, 1983. Chemigation apears to be the new revolution in
Irrigation. Irrigation Age. April, 1983. p. 6-7.
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ATTACHMENT 3
Participants
1.	Water Quality Subcommittee of the High Plains Technical
Co-ordinating Committee (U.S.G.S., Colorado Department of
Agriculture, Colorado Department of Health, CSD Co-operative
Extension Service)
2.	Colorado Aerial Applicators Association
3.	Colorado Department of Natural Resources
A. U.S. Environmental Protection Agency, Region VIII
5.	Federal Emergency Management Agency
6.	Agri-Inject
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FIGURI 1 «NTt* PIVOT IRRIGATION SYSTEM
JF? v...
»i
j



i--T« ink at
.--frtn^rt 4*.>«
Itlr ~KPW l|l«l
flto (tea ulw (»»H)
•	IUW Kill
Kn • i* tiat Cmu *•'»#
H-lM Ht»t l»r«la Va 1 «•
|«(rtu lilt*
lltctric UM'tl
(Itclrltll ijtlai
tmt
¦••!» Um cmu k«i>*
mm • • • «*d win
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FIGURE 2 CHEMICAL INJECTION UNIT
Oteck Valve
N - Air Lock Bleed Valve
0--Nylor\ Hose
f--Calibration Cylinder
Q--Worse Tank
R--Nurse Tank Lid - Vented
Drain
"T-On-OFf Valve5
0--f liter
V--TKr€aded Wvlo* Couplets - (A)
V -Orainable Platform
^--Conc 01 aphrofA Injection Pump
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APPENDIX F
Review of Nacholite Extraction Technology
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Industrial Resources, Inc.
ftilTr 5*o
BOO Umuh |ii»i i.r\ amp
Lakewood, Coixdrauo 80228
T» IXrHuM SO.I PM0-4507
14 April 1983
Mr. Mark Bell
Colorado Water Quality Control Division
Colorado Department of Health
421D East 11th Avenue
Denver, CO 80220
RE: Underground Injection Control (UIC) permit requirements.
Dear Mr. Bel 1:
Industrial Resources Inc. (IRI) is proposing to develop a single well bulk
sanpling test to solution mine nahcolite in the NE 1/4 of Section 27, T1S,
R98W in Rio Blanco County, Colorado. From discussions with you (14 March
1983) through our environmental consultant, Canp Dresser and McKee (CDM), it
is my understanding that the U1C program is not currently in place but that
your agency requests an Informational letter describing our process in
relation to U1C reouirements. This letter, therefore, serves to delineate
critical components of the proposed injection program in terns of specific
regulatory requirements. Information provided herein is designed to meet
the requirements of 40 CFR 122 and 40 CFR 146, as amended. The proposed
program is presented below in terms of the plan of operation, the existing
hydrogeologic environment, and proposed monitoring plans.
Plan of Operation
The proposed mining plan involves a Class 111 well for the solution mining
of salts. It consists of a single well test to (1) demonstrate the
feasibility of solution mining techniques for the extraction of nahcolite,
(2) optimize the mining process, and (3) evaluate product characteristics.
The single well test will be conducted over approximately a six-month period
during the surmer and fall of 19B3, with a total production of approximately
250 tons of nahcolite.
Drilling of the production well is scheduled to commence in mid-May 19B3.
The well will be drilled to an initial depth of approximately 1,795 feet.
(Geologic and geophysical logging will be accomplished following drilling
activities.) This section will be fully cased with a nominal 6-inch
diameter steel casing. Surface casing of approximately a 10-inch diameter
will also be installed. The annular space between the well bore and casing
will be sealed to adeouately isolate the injection zone from the lower
aquifer, and the lower aquifer from the upper aquifer, (reference geoloqic
description below) with a cement or grout/bentonite slurry. Additionally,
150 feet of steel surface casing will be sealed in place to preclude
Introduction of surface runoff. Once the annular seal has been established
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Page 2
14 April 1983
Mr. Hark Bell
end verified by bond logging, an open hole Injection zone will be drilled to
a depth of 1,8?6 feet. Total surficlal disturbance associated;with
production drilling activities will consist of an area approximately 50 feet
by 75 feet in size.
Nahcolite will be extracted using solution mining techniques. Hot water
will be injected into the saline zone (1,795 to 1,826 feet below qround) and
the dissolved nahcolite will be pumped to the surface. The pregnant
solution will be pumped from the injection well through pipes to a surface
bulk sampling plant. Processing Includes dewatering, drying, and
crystallizi ng.
Additional ancillary surface facilities will include a portable power
generator, topsoil stockpile, a pit (plastic-lined) to hold water for
drilling purposes, and access road(s). Details of the surface facilities
and associated activities are provided in the Limited Impact Permit, on file
with the Colorado Mined Land Reclamation Division (CMLRD).
Existing Hydroqeologic Environment
The site is situated near the center of the Piceance Basin, an asymetrical
trough filled with thick seauences of Eocene age deposits (see attached
Figures 1 and 2). The dominant geologic units are the Uinta and Green River
Formations. The younger Uinta Formation comprises the exposed surficial
strata, largely silty sandstone and siltstone, with interbedded marlstone.
The unit is approximately 1,000 feet thick on this site. The Green River
Formation underlies the Unita Formation, and has a total thickness of
greater than 3,000 feet. The Green River Formation is divided into three
principal sub-units. In descending order, these are the Parachute Creek,
Garden Gulch, and Douglas Creek members. The latter two members are
characterized by largely Impermeable shales and clayey siltstone, and
generally comprise the lower confining zone for the ore body.
The Parachute Creek member is typically divided into upper and lower zones,
with the kerogen-rich Mahogany Zone comprising a semi-permeable to
impermeable intervening layer. Similarly, the occurrence of ground water
within the Pa/achute Creek member is divided into upper and lower aquifers.
The upper aquifer includes fractured marlstones of the upper Parachute Creek
member as well as fractured sandstones of the overlyinq Uinta Formation.
The lower aquifer consists of marlstones which have been extensively
leached, where nahcolite has been dissolved from the formation. This is
consequently referred to as the leach zone. These aquifers are the only
potential Underground Sources of Drinking Water (USDW) beneath the site.
The zone of injection, regionally referred to as the saline zone, underlies
the lower aquifer. The saline zone itself is uniformally a nahcolite-
bearing marlstone and is relatively impermeable. It is not, and cannot be,
considered a USDW. This mineralized zone occurs at a depth of approximately
1,79? feet, and is separated from the lower aquifer by nearly 30 feet of
relatively competent, unleached marlstones. Within these marlstones are
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Page 3
14 April 1983
Mr. Mark Bell
three highly plastic kerogen zones referred to as the "rubber beds" whereas
Garden Gulch and Douglas Creek strata form an Impermeable lowei* boundary to
the saline zone. The rubber beds provide hydraulic Isolation above the
saline zone to the lower aquifer.
1R1 Is utilizing a 1/4-mile radius to encompass the area of review.
However, data available from both inside and outside this area have been
utilized for the characterization of the existing environment. A ground
water use Inventory indicates that no ground water wells have been installed
within a one-mile radius of the proposed injection site. Additionally,
ground water use from the lower aquifer 1s sparse, owing largely to high
levels of Total Dissolved Solids (TDS) in the aquifer. TDS concentrations
are uniformly in excess of 1000 mg/1, and often range as high as 40,000
mg/1 as reported in the Final Supplemental Environmental Impact Statement
for the Prototype Oil Shale Leasing Proqram (Bureau of Land Management
1983.)
Proposed Monitoring Plans
1RI proposes a monitoring plan that encompasses three components:
(1)	Well construction that ensures no migration of injection fluid
through the well bore,
(2)	Calculation of a fluid balance during injection and recovery, and
(3)	Installation and sampling of a monitoring well.
The production well will be fully cased through the lower aquifer and
through the intervening impermeable kerogen beds. Therefore, no loss of
fluid is anticipated through the well itself. Furthermore, the annulus will
be sealed to prevent upward migration from the injection zone into the lower
aquifer in the well bore.
Any potential excursion of injection water or saline-pregnant recovery fluid
will be detected from deficits 1n the water balance. As noted previously,
no migration is anticipated due to the impermeable character of the
Injection zone and overlying strata.
1R1 will install a monitor well to provide an extra measure of security.
Data from existing wells in the area have been utilized to calculate the
flow direction (N 34° E) and approximate natural flow velocity (0.01 ft/day)
of the lower aquifer. These data allow selection of an optimal location
(down-gradient) for installation of the monitoring well.
The monitor well will be initially drilled to a depth of 1,300 feet at the
top of the lower aquifer. This section will be cased for the full length
with 4-inch diameter steel casing, and the annular space sealed across the
Mahogany Zone as with the production well. An open hole completion interval
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Paoe 4
11 April 1983
Mr. Hark Bell
will then be drilled to a total depth of 1,765 feet below oround surface.
The monitor well will be situated approximately 50 feet from the production
well and will disturb an area of approximately BO feet by 75 feet.
Water samples will be collected three times from the monitor well. These
are prior at operation, during operation, and approximately one month after
operation. Samples will be analyzed for the following consltuents:
These parameters were selected to provide both an adequate representation of
existing conditions and an Indication 1f any fluid Bigration is occurring.
Well Abandonment
Subsequent to completion of the monitoring progran, each well will be
equipped with a locking steel surface cap. The cap will Insure that foreign
material (including surface runoff) will not be introduced into the cased or
completion interval. No plugging or sealing of the wells 1s currently
planned so that the wells can be used for future monitoring purposes if
necessary.
I trust that the information provided in this letter will serve the needs of
your agency. IRI will be happy to work with the Water Quality Control
Division on this test program as with any future Injection programs.
If you have any questions, please call.
C 4	it
Edward C. Rosar
President
ER/db
cc: Paul Osborn, EPA-Denver
M. Jones, Cliffs Engineering
E. Hinzel, CDM
Total Dissolved Solids (TDS)
Sodium
Potassulm
Calcium
Magnesium
Carbonate
Bicarbonate
Chloride
Sulfate
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