DSHW-2024-005366

CHEVRON PRODUCTS COMPANY
Salt Lake Refinery
Salt Lake City, Utah
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STEADY-STATE. QBQUNPWATSR PLOW MODEL Wmmm^S
AND CONTAMINANT TRANSPORT MOPEL Mb> D^)^
FOR THE CHEVRON
SALT LAKE REFINERY
Prepared by
EARTHFAX ENGINEERING, INC.
Salt Lake City, Utah
December 1996
STEADY-STATE GROUNDWATER FLOW MODEL
CONTAMINANT TRANSPOftf MODEL
; ' FOR THE CHEVRON
L SALT LAKE REFINERY
- CHf^OW>R00UCTS COMPANY
'; SalMak#fiftefinery
Salt Lak« City, Utah
Prepared by
EARTHFAX ENGINEERING, INC.
Salt Lake City, Utah
December %$&6
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
TABLE OF CONTENTS
Section Eagg
CHAPTER 1 - INTRODUCTION 1-1
CHAPTER 2 - GROUNDWATER FLOW CONCEPTUAL MODEL 2-1
2.1 HYDROGEOLOGIC SETTING 2-1
2.2 INITIAL POTENTIOMETRIC SURFACE 2-2
2.3 HYDRAULIC PROPERTIES 2-3
2.4 RECHARGE AND DISCHARGE 2-4
CHAPTER 3 - GROUNDWATER FLOW MODEL DEVELOPMENT 3-1
3.1 COMPUTER CODE 3-1
3.2 MODEL GRID 3-2
3.3 BOUNDARY CONDITIONS 3-3
3.4 PARAMETER ZONATION 3-4
3.4.1 Hydraulic Properties 3-4
3.4.2 Recharge 3-5
3.4.3 Drains 3-6
CHAPTER 4 - GROUNDWATER FLOW MODEL RE-CALIBRATION 4-1
4.1 GENERAL 4-1
4.2 RE-CALIBRATION PROCESS 4-1
4.3 RE-CALIBRATION TARGETS 4-4
4.4 RE-CALIBRATION RESULTS 4-5
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TABLE OF CONTENTS (Continued)
Section Page
CHAPTER 5 - CONTAMINANT TRANSPORT CONCEPTUAL MODEL 5-1
5.1 LOCATION AND BACKGROUND 5-1
5.2 TRANSPORT PARAMETERS 5-3
5.3 SOURCES AND SINKS 5-4
CHAPTER 6 - CONTAMINANT TRANSPORT MODEL DEVELOPMENT 6-1
6.1 CODE 6-1
6.2 GRID 6-2
6.3 INITIAL CONDITIONS 6-3
6.3.1 Time Period 6-3
6.3.2 Source 6-4
6.4 PARAMETER ZONATION 6-5
CHAPTER 7 - CONTAMINANT TRANSPORT MODEL CALIBRATION 7-1
7.1 GENERAL 7-1
7.2 CALIBRATION RESULTS 7-2
CHAPTER 8 - MODEL SENSITIVITY 8-1
8.1 SENSITIVITY ANALYSIS PROCEDURE 8-1
8.2 GROUNDWATER FLOW MODEL SENSITIVITY 8-2
8.3 CONTAMINANT TRANSPORT MODEL SENSITIVITY 8-4
iii EarthFax Engineering, Inc.
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December 1996
TABLE OF CONTENTS (Continued)
Section Page
CHAPTER 9 - SIMULATION 9-1
9.1 OILY DUMP SIMULATION PROCEDURE 9-1
9.2 OILY DUMP SIMULATION 9-3
9.2.1 Benzene Simulation Results 9-3
9.2.2 Toluene Simulation Results 9-5
9.3 NORTH TANK FARM AND PONDS 2 AND 3 SIMULATION PROCEDURE . . 9-6
9.4 NORTH TANK FARM SIMULATION RESULTS 9-7
9.5 PONDS 2 AND 3 SIMULATION RESULTS 9-8
CHAPTER 10 - CONCLUSIONS 10-1
CHAPTER 11-REFERENCES 11-1
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LIST OF TABLES
TABLE 2-1 Comparison of Observed Water Levels with Contoured Water Levels
TABLE 2-2 Summary of Representative Hydraulic Conductivities
TABLE 4-1 Differences in Initial and Predicted Water Levels
TABLE 4-2 Volumetric Budget for Flow Model
TABLE 7-1 Benzene Concentration Data
TABLE 7-2 Toluene Concentration Data
TABLE 8-1 Results of Groundwater Flow Model Sensitivity Analyses
TABLE 8-2 Results of Contaminant Transport Model Sensitivity Analyses
LIST OF FIGURES
FIGURE 1-1 Chevron Refinery Vicinity Map
FIGURE 1-2 Chevron Refinery Base Map
FIGURE 2-1 Initial Potentiometric Surface Map
FIGURE 2-2 Monitor Well Location Map
FIGURE 2-3 Measured Hydraulic Conductivity
FIGURE 3-1 Grid
FIGURE 3-2 Boundary Conditions and Drain Node Locations
FIGURE 3-3 Hydraulic Conductivity Zones
FIGURE 3-4 Leakance Zones Between the Shallow and Deep Aquifers
FIGURE 3-5 Recharge Zones
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LIST OF FIGURES (Continued)
FIGURE 4-1 Re-Calibrated Steady-State Potentiometric Surface
FIGURE 4-2 Difference in Initial and Predicted Water Elevations
FIGURE 5-1 Measured Benzene Concentrations, Fall 1994
FIGURE 5-2 Measured Toluene Concentrations, Fall 1994
FIGURE 5-3 Cross Section
FIGURE 5-4 Cross Section Location Map
FIGURE 6-1 Benzene Constant Concentration Cells (Source Cells)
FIGURE 6-2 Toluene Constant Concentration Cells (Source Cells)
FIGURE 7-1 Calibrated Benzene Plume
FIGURE 7-2 Calibrated Toluene Plume
FIGURE 9-1 Oily Dump Simulation Potentiometric Surface
FIGURE 9-2 Simulated Benzene Plume, Unchanged Source Concentrations (Equilibrium)
FIGURE 9-3 Simulated Benzene Plume, Lower Source Concentration (Equilibrium)
FIGURE 9-4 Simulated Benzene Plume, with Source Removed (30 years)
FIGURE 9-5 Simulated Toluene Plume, Unchanged Source Concentrations (Equilibrium)
FIGURE 9-6 Simulated Toluene Plume, Lower Source Concentrations (Equilibrium)
FIGURE 9-7 Simulated Toluene Plume, with Source Removed (200 years)
FIGURE 9-8 North Tank Farm Simulation Potentiometric Surface
FIGURE 9-9 North Tank Farm Simulation Constant Concentration Cells
FIGURE 9-10 North Tank Farm and Ponds 2 and 3 Benzene Plumes after 30 years
FIGURE 9-11 North Tank Farm and Ponds 2 and 3 Benzene Plumes after 100 years
vi EarthFax Engineering, Inc.
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December 1996
LIST OF APPENDICES
APPENDIX A
APPENDIX B
APPENDIX C
APPENDIX D
APPENDIX E
INITIAL WATER-LEVEL DATA
METHODS OF MONITOR WELL AND PIEZOMETER INSTALLATION
AQUIFER TEST ANALYSIS METHODS
DRAIN PACKAGE DATA
TRANSPORT PARAMETER DISCUSSION
vii EarthFax Engineering, Inc.
EXECUTIVE SUMMARY
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
EXECUTIVE SUMMARY
This report presents the results of a groundwater modeling investigation conducted
at the Chevron Products Company Salt Lake Refinery ("Chevron"). The primary goal was
to demonstrate that natural or "Intrinsic" biodegradation, not dilution, of hydrocarbons in
the groundwater is occurring at rates which not only prevent off-site migration, but will
actually cause a reversal or regression of established contaminant plumes over time. In
addition, it was hoped that this process occurs naturally and would not require nutrient
addition or air entrainment. If the model predictions prove valid. Chevron could petition
the Utah Division of Solid and Hazardous Waste to accept monitoring only as Final Remedy
Corrective Action for groundwater.
Based on all previous environmental investigations and groundwater sampling, the
only areas of the facility capable of generating contaminant plumes are:
• the Oily Dump, for benzene and toluene
• the North Tank Farm, for benzene and,
• Ponds 2 and 3, of the Wastewater Treatment System, for benzene.
Once developed, the groundwater flow model and contaminant transport models
were calibrated using data gathered at the refinery and from a literature search. The
calibrated contaminant transport model was used to simulate the behavior of the
contaminants that posed the greatest risk at, and downgradient from, each area. All
simulations were performed for a time period of at least 100 years.
A summary of the results is presented below:
• Oily Dump: Simulations demonstrated that under worst case conditions with
no remediation of the Oily Dump, the benzene plume would extend to a point
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Groundwater Model Report
December 1996
approximately 350 feet west of the Oil Drain. Under actual conditions with
inclusion of the Oily Dump into the current LWMA remediation, the benzene
plume would completely degrade through biodegradation in less than 40
years.
Similarly, under the same worst case conditions, the toluene plume would
extend approximately 50 feet west of the Old Salt Lake Sewer Drain. After
remediation of the Oily Dump is complete, the toluene plume would degrade
to a maximum concentration of 4 ug/l after 200 years and remain greater
than 300 feet from any property boundary.
• North Tank Farm: If the Bonneville Canal / North Tank Farm Groundwater
Intercept System was shut down, the resulting benzene plume would extend
west to within 300 feet of the Oily Dump and south to a point 400 feet
north of the Salt Lake / Davis county line after 100 years. After that time
period, the plume achieved equilibrium and would not extend any farther.
However, removal of the benzene source at the North Tank Farm would
result in eventual regression of the plume if the system were shut down.
When the Groundwater Intercept System is operating, all contaminants in
the groundwater are recovered so no plume is established outside of the
recovery system.
• Ponds 2 and 3: With no remediation, a benzene plume could extend to a
point 200 feet west of the Oil Drain canal after 100 years. The pond
circulation project, currently under construction, will eventually degrade the
source hydrocarbons, thereby causing the potential benzene plume to
degrade and regress back to the Oil Drain Canal.
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These simulations demonstrate that even with the conservative assumptions used
in the model, there is no danger of groundwater contamination extending beyond Chevron
property. In fact, the contaminants within each of the plumes will behave as anticipated
prior to development of the model. As such, existing plumes will either degrade
completely, or reverse their present course and regress away from Chevron property
boundaries back towards the original contaminant source location.
Based on the positive results of this modeling effort. Chevron should submit this
model report to the Utah Division of Solid and Hazardous Waste as specified in Section
3.3.2 of the Chevron Corrective Action Plan (EarthFax Engineering, 1996). A formal
request should accompany the submittal for No Further Action, other than monitoring of
groundwater as Final Remedy Corrective Action. Reference should be made to stipulations
in Module V, Section K, of the pending Chevron Post Closure Permit with regard to the
Groundwater Waste Management Area for monitoring procedures and analytes.
ix EarthFax Engineering, Inc.
1.0 INTRODUCTION
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
STEADY-STATE GROUNDWATER FLOW MODEL
AND CONTAMINANT TRANSPORT MODEL
FOR THE CHEVRON
SALT LAKE REFINERY
CHAPTER 1
INTRODUCTION
On April 5, 1991, Chevron U.S.A. Inc., now Chevron Products Company ("Chevron"),
entered into Consent Order No. 91010011 ("Order") with the State of Utah for their Salt Lake
Refinery. It was stipulated in the Order that Chevron conduct a RCRA Facility Investigation
("RFI") and submit a RFI Report. The investigation was conducted in 1993 and 1994 with
submittal of the RFI Report in December of 1994 (EarthFax Engineering, 1994b). The Utah
Division of Solid and Hazardous Waste ("UDSHW") accepted the RFI Report in October of
1995. In the RFI Report, Chevron defined facility-wide groundwater as the 28th Solid Waste
Management Unit ("SWMU").
Subject to the conditions of the Order, Chevron was required to submit to the UDSHW
a final remedy Corrective Action Plan ("CAP") within 180 days of acceptance of the RFI
Report. Corrective action for groundwater was presented in the CAP which was submitted
to the UDSHW in March of 1996 (EarthFax Engineering, 1996). Approval of the CAP is
expected after a public comment period in early 1997.
Groundwater corrective action is detailed in the CAP to include installation of new
piezometers and monitor wells, collection of both groundwater elevation data and sampies for
chemical analysis, and preparation of a contaminant transport model. The contaminant
transport model would be developed using, as a base, the steady state groundwater flow
model developed for the Salt Lake Refinery in 1992 (EarthFax Engineering, 1992). The
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revised model would be developed to evaluate the primary contaminants of concern for the
entire refinery. Special emphasis was to be placed on the following areas:
the west field benzene and toluene plumes identified in the RFI Report,
the benzene plume within the North Tank Farm SWMU identified during early
Investigations and discussed in the RFI Report, and
Ponds 2 and 3, formerly of the wastewater treatment system, where potential
for a benzene and toluene plume was identified in the RFI Report..
The CAP further states that, through completion of the transport model, Chevron hopes
to demonstrate that active biodegradation of hydrocarbons present in the groundwater is
occurring at an acceptable rate such that no migration of hydrocarbons beyond Chevron
property boundaries will occur. In addition, the CAP states that if this effort is successful,
groundwater monitoring alone will become the final remedy Corrective Action for facility-wide
groundwater.
This report presents the results of the modeling effort discussed above. This latest
flow model is the result of re-calibration of the 1992 flow model. The re-calibration was
necessary because on-going remediation and facility operations activities at the refinery have
resulted in changes to many of the surface water impoundments. The re-calibrated flow
model and the contaminant transport model represent new work conducted by EarthFax
Engineering as part of Chevron's ongoing corrective action process and in compliance with the
schedule for completion stipulated in Table 2 of the Order.
With anticipated approval of the CAP, Chevron is in the final stages of negotiating a
Post Closure Permit ("Permit") with the UDSHW. The Permit will supersede the 1991 Order
as the compliance document of record for the Salt Lake Refinery. For consistency in
terminology, and because of the absence of solid wastes within the groundwater, facility-wide
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groundwater will be referred to in the Permit as the "Groundwater Waste Management Area".
As such, all future reference in this report will be consistent with this change.
The numerical model MODFLOW (McDonald and Harbaugh, 1984) was used during the
modeling effort to simulate groundwater flow conditions. The numerical model MT3D (Zheng,
1994) was used to simulate the contaminant plume behavior.
This document is divided in 11 chapters, including this introduction. Chapter 2
presents a general description of the groundwater flow conceptual model. The details of the
model construction for the groundwater flow and contaminant transport models are presented
in Chapters 3 and 6, respectively. The contaminant transport conceptual model is presented
in Chapter 5. Details of the calibration and results for the groundwater flow and contaminant
models are presented in Chapters 4 and 7, respectively. Chapter 8 presents results of the
sensitivity analysis. Simulation results are presented in Chapter 9, followed by the
conclusions in Chapter 10. Chapter 11 contains references. Tables, figures, and appendices
A through F follow the text.
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2.0 GROUNDWATER FLOW
CONCEPTUAL MODEL
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
CHAPTER 2
GROUNDWATER FLOW CONCEPTUAL MODEL
This modeling investigation has the benefit of using a groundwater flow model
developed for the Chevron refinery in 1992 as the basis for re-calibration of the groundwater
flow model and application of the contaminant transport model (EarthFax Engineering, 1992).
For simplification this model will be referred to as the "1992 flow model" throughout this
report. Many of the aspects have not changed from the 1992 flow model to the present.
Chapter 2 of the 1992 flow model contains a discussion of the hydrogeologic setting of the
refinery area and a discussion of the parameters pertinent to the groundwater flow model.
These will not be duplicated in this report. The reader is referred to the 1992 flow model
report for this information. The discussion in this chapter will be limited to information
pertinent to the present flow model.
When reading this report it should be understood that the flow model is only an input
for the contaminant transport model. As a result, some changes have been made to the flow
model which make it more suitable as a driver for a contaminant transport model but are not
appropriate when used as a flow model only.
2.1 HYDROGEOLOGIC SETTING
The hydrogeologic setting has not changed since the 1992 flow model was completed.
However, one simplification has been made which warrants a brief discussion. The 1992 flow
model evaluated both the deep and shallow aquifers. The current model is limited to the
shallow aquifer. The deep aquifer has not been directly modeled for this investigation since
it has not been contaminated. Moreover, artesian pressure makes it extremely unlikely that
contamination will occur. —.
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2.2 INITIAL POTENTIOMETRIC SURFACE
The steady-state potentiometric surface of the shallow unconfined aquifer used in the
flow model was based on water-level measurements collected from the shallow monitor wells
at the refinery (see Figure 2-1) in October 1994 (EarthFax Engineering, 1994a). Additional
water-level data for the unconfined aquifer were obtained from monitor wells at the Chevron
Products Company, Salt Lake Marketing (Marketing) Terminal. Available water-level data for
the Flying J Refinery (Dames & Moore, 1990) and the Amoco Refinery (Geowest Golden, Inc.,
1991) located about 3000 feet north and 5000 feet south of the Chevron refinery,
respectively, were also reviewed in preparing the initial shallow aquifer potentiometric-surface
map. The specific water level data from the Flying J and Amoco refineries were not used.
The data were only used to gain a general understanding of the potentiometric surface outside
of the Chevron property boundary. These data aided in establishing boundary conditions for
the groundwater flow model. The groundwater flow model was calibrated to the October
1994 potentiometric surface data because the most extensive database of contaminant
concentration information was available for that time.
The measured water-level data were gridded using PMDIS, a utility program included
with Processing Modflow for Windows (PMWIN) (Chiang and Kinzelbach, 1996). PMDIS takes
the irregularly spaced data points and uses the method of kriging to interpolate a value for
each cell in the variably spaced model grid. Kriging is the interpolation method used most
frequently to define the spatial variability of a parameter over the problem domain (Anderson
and Woessner, 1992). Because the method of kriging was used on randomly spaced data,
the interpolated water-level values at the monitor well locations did not exactly match the
measured water-level data. The difference between the measured water levels and the
contoured water levels is less than one foot in all wells and less than 0.34 feet in all but two
wells. These data are presented in Table 2-1. The contoured initial potentiometric surface
for the shallow aquifer is presented in Figure 2-1.
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Because water-level data do not exist for the extreme boundaries of the model area,
approximations were made. Potentiometric surface contours were extended to the model
boundaries based on the general trends observed where data were available. In addition,
potentiometric contours were approximated based on topographic trends in the area. These
trends were included in the PMDIS data file by adding several water-level data points within
the study area boundary. A complete list of the initial water-level data is presented in
Appendix A.
The general groundwater flow direction is from the east to the west. The hydrauljc_
gradient in the shallow aquifer ranges from 0.00067 foot per foot (ft/ft) to 0.017 ft/ft.
2.3 HYDRAULIC PROPERTIES
Since the 1992 flow model was completed, many wells have been installed for
monitoring purposes. The new monitor^wells and some old wells that had not been tested
previously were slug tested to add to the database of hydraulic properties gathered for the
1992 flow model. Some new wells were installed when the current flow modeling was nearly
complete. The well logs from these wells were used to aid in the contaminant transport
model calibration but were not slug tested. Appendix B contains the location of the newly
installed monitor wells, a table containing coordinates of all monitor wells at the refinery, and
monitor well drill logs and completion details. A description of the aquifer testing and
analysis program used by EarthFax for slug testing is presented in Appendix C of the 1992
flow model report. Appendix C of this report contains the location of the monitor wells slug
tested for this project, a summary table of the slug test results, and the slug test analysis.
A summary of the representative hydraulic conductivity values for the shallow aquifer
is contained in Table 2-2. Based on the results of the bail, slug and pumping tests, the
hydraulic conductivity of the unconfined aquifer varies by nearly three orders of magnitude,
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ranging from 0.03 feet per day (ft/day) at well EF-12 to 17.3 ft/day at EB-11. See Figure 2-2
for well locations.
Figure 2-3 presents a plot of the horizontal hydraulic conductivity distributions in the
shallow aquifer. This plot was generated using the data contained in Table 2-2, together with
the program SURFER for Windows (Golden Software, 1995) and the kriging method. As
indicated, hydraulic conductivity values are quite variable in the study area. In general,
hydraulic conductivities tend to be higher in the eastern and central portion of the refinery
property and lower towards the west.
2.4 RECHARGE AND DISCHARGE
Since the 1992 flow model was developed, a number of projects have been completed
which have altered the recharge distribution and has both added to and removed some drains
from the 1992 model. Details about how the recharge distribution has changed are discussed
in detail in Section 3.4.2 of this report. Section 3.4.3 discusses in detail the changes made
in the drain system. The reader may refer to Section 2.4 of the 1992 flow model report for
a general discussion of recharge and discharge at the refinery.
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3.0 GROUNDWATER FLOW
MODEL DEVELOPMENT
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
CHAPTER 3
GROUNDWATER FLOW MODEL DEVELOPMENT
The methods and processes used in re-calibrating the current flow model are very
similar to the methods and processes used to create the 1992 flow model. As with Chapter
2, this chapter will contain information regarding what has changed since the 1992 flow
model and will refer the reader to the 1992 flow model report for much of the background
information. Paragraphs taken directly from the 1992 flow model report which are needed
to make the report flow smoothly will be designated herein by quotes at the beginning and end
of the paragraph.
3.1 COMPUTER CODE
Groundwater flow in the Chevron Refinery study area was modeled using the modular,
three-dimensional, finite-difference model of McDonald and Harbaugh (1988) called
MODFLOW. An IBM-PC version of MODFLOW included with the pre-processor Processing
Modflow for Windows (PMWIN) written by Chiang and Kinzelbach (1996) was used for this
study. MODFLOW and PMWIN are written in ANSI Fortran 77 and were compiled using the
Lahey F77L-EM/32 Fortran Compiler. MODFLOW and PMWIN have been specifically designed
to allow access to extended memory for large grids. PMWIN can be executed on any IBM
personal computer or compatible model capable of running Microsoft Windows 3.1 or later
with at least 8 megabytes of available memory. For this project, MODFLOW was run from
within PMWIN on a 133 MHZ Pentium processor with 32 megabytes of available memory.
"MODFLOW is a finite-difference model which can simulate groundwater flow in quasi-
three dimensions. It is written with a modular structure consisting of a main program and
several independent subroutines called modules. The modules are grouped into packages that
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deal with specific features of the hydrologic system (such as flow to drains, flow to wells,
etc.) or with a specific method for solving the linear equations that describe the groundwater
flow system. Layers can be simulated as confined, unconfined, or a combination of the two."
The software package, PMWIN, written by Chiang and Kinzelbach (1996), was used
as a computer-aided graphical tool to design the flow model structure. PMWIN was used to
input the dimensions of the model domain, the initial conditions, the physical properties of the
model, and the data for the selected MODFLOW packages. A DXF-format base map,
constructed in AutoCAD Release 12 (Autodesk, Inc., 1994), was imported into PMWIN. The
model grid was overlain on the base map and aerially distributed data were specified in the
form of zones or designated on a cell by cell basis.
The program PMWIN was used extensively during model calibration. PMWIN includes
some powerful features for creating, adjusting and manipulating MODFLOW input files.
PMWIN also includes features which allow easy interpretation of results.
3.2 MODEL GRID
The model grid was modified from the 1992 flow model for the current effort. The
areas of interest for the models were different and, as a result, the smallest cells are
concentrated in different areas. Figure 3-1 presents the grid system used with the current
model. It consists of 105 rows and 99 columns, with grid spacing varying from 50 to 250
feet. The total area modeled was 7,200 feet wide and 8,500 feet long (approximately 2.2
square miles).
The larger grid spacing (250 feet) was used near the boundaries to allow for a larger
model area, thus minimizing the effects of boundary conditions on the central portion of the
grid. The smaller grid spacing (50 feet) was used in the western half of the refinery property
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where contaminant migration was of primary concern. This small spacing was used to
achieve a finer resolution over the area of modeling importance. Care was taken to increase
the nodal spacing by no more than 1.5 times the previous nodal spacing (Anderson and
Woessner, 1992).
A single layer is defined for the groundwater flow model with a leakance term (see the
1992 flow model report Section 2.3.2 for a definition of leakance) added to simulate the
effect of the deep aquifer on the shallow aquifer. Since contamination has only been
observed in the shallow aquifer and contaminant migration to the deep aquifer is highly
unlikely given the upward gradient from the deep aquifer to the shallow aquifer, a quasi 3-D
flow model with a leakance term was deemed adequate for this effort.
3.3 BOUNDARY CONDITIONS
"Two types of boundary conditions were used in the model. These include specified-
head and no-flow boundaries (see Figure 3-2). A specified-head boundary is simulated by
setting the water levels at the relevant boundary nodes equal to known values. Specified-
head boundaries were used in the model, based on the initial potentiometric surfaces, to
represent both sources of recharge and discharge. As such, specified-head boundaries were
used on the east and portions of the west sides of the grid."
The boundary conditions for this model were set up the same as in the 1992 flow
model to the extent that the modified grid would allow, with the exception that the Reservoir
Waste Management Area (RWMA) was also set to be a specified head boundary. This area
was set as a specified head because even though the RWMA has recently been closed and
capped, a groundwater mound still exists beneath the area. Although this mound will likely
dissipate with time, no data were available to accurately estimate the rate of dissipation.
Since the purpose of the groundwater flow model is to provide accurate flow conditions for
the contaminant transport model, and since the groundwater mound beneath the RWMA was
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present when the benzene and toluene plumes from the nearby Oily Dump were being
generated, maintaining the mound in flow portion of the model would best simulate the
conditions under which the benzene and toluene from the Oily Dump were generated..
3.4 PARAMETER ZONATION
"The parameter inputs required by the model include hydraulic properties (hydraulic
conductivity, aquifer thickness, and leakance), recharge values and drain information.
Hydraulic conductivity, leakance, and recharge were discretized into zones, while other
parameters were input on a cell by cell basis. Since the actual parameter distributions are far
more complex than the model has the power to replicate, and probably far more complex than
can be measured, the zones were used to group similar values together. It should be noted
that too many zones for one parameter value may cause several problems, including
convergence difficulties and numerical instability. As stated by Doherty (1990), 'simpler is
"A comprehensive discussion of the model calibration procedure is presented in
Chapter 4. It should be noted that the initial input parameters were modified during re-
calibration using an iterative process until satisfactory results were obtained."
3.4.1 Hydraulic Properties
The hydraulic properties input into the model during re-calibration included horizontal
hydraulic conductivity, aquifer thickness, anisotropy, and leakance between aquifers. Only
the hydraulic conductivity distribution was modified beyond changes required by the new grid.
A discussion of hydraulic conductivity, aquifer thickness, anisotropy, and leakance and their
definitions can be found in Section 3.4.1 of the 1992 flow model report.
better'. i it
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The additional hydraulic conductivity data from the new slug tests were added to the
existing database and, as a result the hydraulic conductivity distribution in the northwest
portion of the refinery was modified from the 1992 flow model. Based on data presented in
Figure 2-3, 20 zones of similar hydraulic conductivity were delineated for the shallow aquifer.
These zones were modified slightly during model re-calibration to ensure that the initial
potentiometric surface would be mimicked, thus resulting in a truer representation of the
actual potentiometric surface. The final re-calibrated hydraulic conductivity values for the
shallow aquifer ranged from 0.05 to 17 ft/day, which corresponded closely with measured
values. The distribution of hydraulic conductivity values derived during final calibration for the
shallow aquifer is presented in Figure 3-3.
The values used for leakance did not change from the 1992 flow model. However, the
distribution changed slightly due to the new model grid. The distribution of leakance can be
seen on Figure 3-4.
3.4.2 Recharge
The distribution and rate of recharge changed from the 1992 flow model. However,
the portion of the model grid which could receive recharge remained the same as in the 1992
flow model, with one exception. A discussion of how the area where the aquifer could
receive recharge was determined can be found in Section 3.4.2 of the 1992 flow model
report. After the 1992 flow model was completed, the RWMA was remediated and closed
(see Figure 1-2). During the 1992 modeling effort, the RWMA was still a reservoir and was
a source of recharge to the aquifer. After its completion, the cell allowed no recharge in this
area. Another change since completion of the 1992 flow model is that pond 1A (see Figure
1-2 of the 1992 flow model report) had been removed from service thereby reducing the
recharge in that area. The distribution of recharge for the refinery is shown in Figure 3-5.
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3.4.3 Drains
Since the 1992 flow model was completed, several areas which acted as drains have
been modified. The No. 2 outfall channel has been removed and portions of the Bonneville
Canal have been removed and replaced with a groundwater intercept system. Most of the
Bonneville Canal east of the RWMA was backfilled except the far eastern end of the canal.
During backfilling operations, the Bonneville Canal / North Tank Farm Groundwater Intercept
System was added to remove groundwater contamination due to spills and leaks within the
North Tank Farm. Other than the drains specifically mentioned above, the drains stayed the
same as in the 1992 flow model. Figure 3-2 shows the location of all drains within the model
area. The conductance values and drain elevations are tabulated in Appendix D.
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4.0 GROUNDWATER FLOW
MODEL RE-CALIBRATION
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
CHAPTER 4
GROUNDWATER FLOW MODEL RE-CALIBRATION
4.1 GENERAL
During re-calibration, modifications were made to the initially-assumed aquifer
parameters (hydraulic conductivity, leakance, recharge, drain conductance) until the steady-
state potentiometric surfaces and fluxes matched field-measured values within a pre-
established range of error. Finding these values is known as the inverse problem, where the
objective is to determine parameter values and hydrologic stresses from information about the
potentiometric surface.
A groundwater flow model can be calibrated for steady-state or transient conditions.
Steady-state flow occurs when, at any point in an aquifer, the magnitude and direction of the
flow velocity are constant with time. Transient flow occurs when, at any point in an aquifer,
the magnitude or direction of the flow velocity changes with time (Freeze and Cherry, 1979).
This model was re-calibrated to represent steady-state flow conditions. It was assumed that
external stresses on the system, besides underflow across the grid boundaries, surface
recharge, and flow from drains, did not exist at the time represented by the initial
potentiometric surface. Therefore, the initial potentiometric surface was considered
representative of steady-state flow conditions.
4.2 RE-CALIBRATION PROCESS
The 1992 flow model provided a very good starting point for the re-calibration of this
groundwater flow model. A new groundwater flow model was necessary for a number of
reasons.
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• The purpose of the groundwater flow model has changed.
• More hydrogeologic information was available.
• The Bonneville Canal / North Tank Farm Groundwater Intercept System had been
installed.
• Portions of the Bonneville canal have been removed.
• A number of ponds of the wastewater treatment system have been removed or closed.
• The measured potentiometric surface was more accurate because more data points
were available.
• Finally, the flow model was to be calibrated to the fall 1994 potentiometric surface
data instead of spring 1992 data.
Locations of the above mentioned features can be found on Figure 1-2.
Two methods are available to define model parameters to achieve calibration. These
include the manual trial-and-error adjustment of parameters and the automated parameter
estimation. Only the manual trial-and-error method was used to re-calibrate this groundwater
flow model.
The most common method, manual trial-and-error, is an iterative process where the
input data are varied, within a reasonable range, until the goodness-of-fit criteria (Section 4.3)
are achieved. If, after a model run, the initial and predicted water levels do not adequately
match, the model input parameters are altered manually, and the model is re-calibrated.
The calibration process is difficult because values for the input parameters are typically
known only at a few nodes, and even those estimates are uncertain. It is important to note
that individual calibration techniques may produce non-unique solutions when different
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combinations of parameters yield essentially the same head distribution (Anderson and
Woessner, 1992).
Wide variations in the magnitude of the input hydraulic parameters have been measured
in the field. This is particularly true of the hydraulic conductivity, where large variations have
been seen in the field over distances that are small relative to the model boundaries (see Table
2-2, Figure 2-3, and Figure 3-3). In addition, while field hydraulic tests provide data
representative of an area within a few feet to a few tens of feet from the well being tested,
the model examines hydrostratigraphic blocks with side lengths of 50 to 250 feet (an increase
of one to two orders of magnitude beyond that of the field tests). Also, in several areas of
the model grid (particularly on the boundaries), field estimates of hydraulic conditions are
lacking since the majority of the data have been collected within the facility area. Thus, in
making the transition from the localized data base of field tests to the "global" data base of
the model, direct comparisons with field data from a particular location are not always
appropriate.
In the case of hydraulic conductivity, care was taken during model calibration to ensure
that the magnitudes of the hydraulic conductivities selected for the model were within the
range of values measured in the refinery and adjacent areas. In the case of the leakance
coefficient, the same values as determined during the 1992 flow model calibration were used.
As stated above, the hydraulic conductivity values assigned to the zones were all
within the range of values measured in the field. All hydraulic conductivity values assigned
to zones are within one order of magnitude of the hydraulic conductivity of any well within
the zone, and in most cases much closer than one order of magnitude. Two exceptions to this
occurred. The long narrow zone west of Ponds 2 and 3 is one of the exceptions. Only one
well falls within this zone, WFP-3 (see Figure 3-3 for zone location and Figure 2-2 for well
location). The difference in hydraulic conductivity between WFP-3 and the zone is just over
one order of magnitude. The low hydraulic conductivity assigned to this zone can be justified
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in two ways. First, the model has a poor calibration without the low value. Second, many
wells in the west field have similar hydraulic conductivities, if not lower.
The second exception is the high hydraulic conductivity zone (10 ft/day) west of the
Oily Dump (see Figure 3-3). Zheng and Bennett (1995) state that deficiencies in the flow
model calibration are often discovered during calibration of the contaminant flow model. The
behavior of the contaminant plume, such as travel times, often give a better understanding
of hydraulic conditions in the vicinity of the plume. As discussed later, the need for this high
hydraulic conductivity zone became apparent during calibration of the contaminant transport
model. The travel times for the plume to reach the extents measured in October of 1994
could not be simulated by MT3D unless the higher hydraulic conductivity zone was added.
Although no wells near this zone have that high of a hydraulic conductivity value, the value
assigned to the zone is well within the range of values measured at the refinery. The highly
variable hydraulic conductivity values measured over short distances within the refinery makes
small zones and dramatic changes in hydraulic conductivity over a short distance, such as this,
reasonable.
The contaminant plumes' behavior also helped to define the low hydraulic conductivity
zones north and south of the area discussed above (see Figure 3-3). A contaminant in
groundwater will take the path of least resistance as does the water. If a contaminant plume
encounters an area of low hydraulic conductivity, it will change directions to find the path of
least resistance. Thus, the behavior of contaminant plumes provides information on the
relative high and low hydraulic conductivities in the area.
4.3 RE-CALIBRATION TARGETS
Four criteria were utilized as a measure of the goodness-of-fit of the model during the
calibration efforts. These criteria were to:
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1. Approximate the shapes of the measured potentiometric surface,
2. Minimize the differences between the measured and predicted water levels,
with a maximum difference of 2 feet.
3. Achieve convergence of the model with a maximum water-level change
between iterations of less than 0.01 feet, and
4. Achieve an approximate mass balance between inflow to and outflow from the
steady-state model, with a mass balance error of less than ± 0.5 percent.
These criteria are the same as used for the 1992 flow model except the maximum
mass balance error allowed was reduced from 2% to 0.5%. A more detailed discussion of
calibration targets and the quantification of error can be found in Section 4.3 of the 1992 flow
model report
4.4 RE-CALIBRATION RESULTS
Due to the large number of pages associated with each run of the model, these
printouts are not reproduced in this report; however, model input and output computer files
associated with all runs are available on floppy disk in the files of EarthFax Engineering for
review.
The re-calibrated steady-state potentiometric surface for the shallow aquifer is
presented in Figure 4-1. A comparison of this figure with Figure 2-1 (initial potentiometric
surface) indicates that the final calibrated steady-state potentiometric surface closely
resembles the initial water levels and flow pattern.
Differences between the elevation of the predicted steady-state and the initial
potentiometric surfaces are greatest in areas where the natural hydraulic gradient is
comparatively steep. The shapes of the potentiometric surfaces and flow directions, however,
were adequately represented in these areas by the model. It is difficult to precisely mimic the
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natural potentiometric surface in areas of steep natural gradient, especially when those
gradients occur in regions of large grid spacing. This scenario occurs within the north and
northeastern portion of the model grid, away from the area of primary concern (the area west
of the Oil Drain). Thus, the water-level differences in these areas are not considered serious.
Graphical representation of the difference between the initial and the predicted steady-
state potentiometric surfaces are presented in Figure 4-2. From this figure, it is evident that
the re-calibrated and measured water levels in most area by less than 1 foot. A notable
exception is a small area in the northeast portion of the model area where, according to Table
4-1 the difference between the initial and predicted water levels was found to be 2.75 feet.
This large discrepancy is acceptable since it is in an area of low importance. It is in an area
that was not used by the contaminant transport model. In general the comparison between
the two water levels is very good.
The Mean Average Error (MAE) for the re-calibrated steady-state model is 0.68 foot.
This value is well below the error criterion of 2 feet established prior to calibration (see
Section 4.3). In addition, the Root Mean Square (RMS) error for the calibrated model is 0.93
foot, which is also within the pre-established error criterion. The MAE and RMS are based on
the difference between the measured head values and the calibrated head values at monitor
wells.
The mass balance error of the re-calibrated model on a daily basis was -0.01 percent
after the flow model had been run over a predictive period of 41 years. This error was within
the pre-established error criterion of ± 0.5 percent identified in Section 4.3. The negative
value indicates that slightly more outflow than inflow is being predicted. In general, the
majority of the inflow results from underflow across the model boundary. The primary form
of outflow is through the drain systems in the shallow unconfined aquifer. A summary of the
inflows and outflows to the model is presented in Table 4-2.
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The steady-state model converged with a maximum drawdown of 0.01 foot on the
final iteration. Thus, together with the adequate water balance and resemblance of the
potentiometric surfaces, all of the calibration criteria discussed in Section 4.3 were met.
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5.0 CONTAMINANT
TRANSPORT
CONCEPTUAL MODEL
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
CHAPTER 5
CONTAMINANT TRANSPORT CONCEPTUAL MODEL
5.1 LOCATION AND BACKGROUND
Nearly the entire flow model grid was utilized during simulation of contaminant.
However, to simplify the calibration process and concentrate on a critical area with an
extensive database, the contaminant transport model was calibrated using the reduced area
identified on Figure 3-1. The northern boundary of this 269-acre reduced calibration area is
approximately 550 feet south of Interstate 215 and the southern boundary is the Salt Lake -
Davis County line. The western boundary is approximately Redwood Road and the eastern
boundary is at the eastern extent of the Reservoir Waste Management Area (RWMA). This
reduced calibration area was of sufficient size to include the "West Field" benzene and toluene
plumes identified in Section 6.3 of the RFI report (EarthFax Engineering, 1994b).
Three areas within the calibration study area have exhibited elevated hydrocarbon
content in the groundwater at some time. The first, and one of greatest concern, is
immediately west of the Oil Drain in the vicinity of the Oily Dump. The second area is west
of Ponds 2 and 3. The third is the North Tank Farm. The areas described above can be found
on Figure 1-2. Groundwater contamination west of the Oily Dump is well documented (e.g.,
EarthFax Engineering, 1994b) and as such a contaminant transport model for this area can be
calibrated. However, the potential plume west of Ponds 2 and 3 has not been consistently
observed. Ponds 2 and 3 have maximum TPH values in the bottom sludges of 10,000 and
14,400 mg/kg, respectively, and are a possible source of groundwater contamination.
Although possible sources exist in Ponds 2 and 3, groundwater contamination has only been
detected west of the Oil Drain during one sampling event. Subsequent sampling did not verify
the existence of the contamination. In addition to the historical data collected from monitor
well sampling, 33 piezometers were installed and sampled west of Ponds 2 and 3 in the west
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field as part of this modeling investigation. All samples taken were below detection limits
with respect to benzene, toluene, ethylbenzene, and xylene. A map containing the location
of the newly installed piezometers can be found in Appendix B Figure B-2. Because of the
statistical reliability of the one time groundwater detection, and because data are not available
to adequately calibrate a model in this area, the behavior of a possible plume will be simulated
based on calibration results from the Oily Dump plume.
The groundwater contamination below the North Tank Farm and Landfarm are being
controlled by the Bonneville Canal / North Tank Farm Groundwater Intercept System. As a
result of this transient condition model calibration in this specific area was not considered
feasible. However, simulation of potential future North Tank Farm plume behavior was run
based on results from the Oily Dump calibration. A detail discussion of these simulations is
provide in Chapter 9.
Numerous monitor wells and piezometers have been installed west of the Oily Dump
to characterize the aquifer in that area and to define the extent of the benzene and toluene
plumes. Figures 5-1 and 5-2 depict the benzene and toluene plumes measured in the fall of
1994. According to these figures, the groundwater contamination appears to be localized
directly beneath the Oily Dump except in one area where the plume has extended west of the
Oil Drain. As discussed in Section 2.1.3, the shallow aquifer beneath the refinery is
comprised of interbedded silt, sand, and clay lenses which pinch out and terminate
unpredictably. According to the cross section presented in Figure 5-3, a permeable lens of
sand exists beneath the Oil Drain along the line defined by wells S-2, S-30, WFP-5 and WFP-
10 in the area of the plume. This sand lens may be the conduit by which the contamination
has been transported beyond the Oil Drain. Also, shown on Figure 5-3 is the fact that the
sand lens pinches out before reaching WFP-10. The location of the cross section can be
found on Figure 5-4.
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5.2 TRANSPORT PARAMETERS
The following parameters and the range of values appropriate for each parameter, if
applicable, were utilized in the contaminant transport modeling. A detailed discussion of each
of the parameters and a justification for the range of appropriate values is contained in
Appendix E.
• Molecular diffusion is the process by which ions or molecular constituents in a solution,
in this case benzene and toluene, move under the influence of molecular activity
towards areas of lower concentration. The range of values used for the molecular
diffusion coefficient during this model calibration was 9.33 x 10"6 ft2/day to 9.33 x 10"
4 ft2/day.
• The retardation factor is a coefficient that represents how the movement of the plume
will be retarded by adsorption of the contaminant on to the solids within the aquifer.
The retardation factor is calculated in the model based on other model inputs.
• Dispersivity is a factor used to account for the spreading of the constituent in the
aquifer by mechanical processes. Longitudinal dispersivity accounts for spreading in
the flow direction and horizontal transverse dispersivity accounts for spreading
perpendicular to the flow direction. The acceptable range for longitudinal dispersivity
is 1 to 50 ft. The acceptable range of horizontal transverse dispersivity is 0.05 to 0.5
times the longitudinal dispersivity.
• Effective porosity. Porosity is defined to be the volume of the voids divided by the
total volume (Freeze and Cherry, 1979). Effective porosity is the percentage of the
total volume that is available for flow. The acceptable range of effective porosities
was determined to be between 25% and 40%.
• Bulk density is the mass of dry soil per unit volume of the soil. The representative bulk
density value used for the model is 122 lbs/ft3.
• The first-order reaction rate is the rate at which the contaminant of concern is removed
from the groundwater by first-order degredation mechanisms (e.g., biodegredation) It
has also been referred to as the decay rate. Reported benzene biodegradation rates
are between 0.0002 and 0.09 1/day and reported toluene degradation rates are
between 0.0006 and 0.07 1/day.
• The fraction of organic carbon is the mass of organic carbon per unit mass of soil.
Results from on-site sampling range between 0.09% and 0.70%.
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5.3 SOURCES AND SINKS
During calibration, the contaminant, whether it be benzene or toluene was assumed
to enter the model from constant concentration cells within the Oily Dump. Constant
concentration cells were set near areas of the Oily Dump where free-phase hydrocarbons have
been found on the water table at a monitoring point. The Oily Dump was assumed to be the
only source of contamination for the calibration of the contaminant model. The source areas
for simulation plumes starting at Ponds 2 and 3 and the North Tank Farm will be discussed
in Chapter 9
The model has five mechanisms to remove contaminant mass from solution. The
mechanisms are biodegradation, drain cells, volatilization, sorption, and mass leaving at model
boundaries. Biodegradation removes contaminant mass by transforming the contaminant into
other compounds. The model accounts for biodegradation through the first order reaction
rate. The decay rate being a first order process is an assumption since no data is available.
Furthermore, MT3D is incapable of simulating a second order decay process.
Contaminated groundwater that flows into a drain cell is removed from the model. The
Oil Drain is the only drain within the reduced calibration area that removes contaminate mass
from the model. The Bonneville Canal / North Tank Farm Groundwater Intercept System
served as a drain which intercepted contaminants during simulation runs.
Volatilization is the mechanism by which the contaminant is converted from the sorbed
or solution phase to the vapor phase. Once volatilized the contaminant is carried away by any
moving air. Volatilization was also accounted for in the model by the first order reaction rate.
Finally, any mass which reaches model boundaries would flow from the model and be
removed. Contaminant mass in solution which is adsorbed onto organic matter in the aquifer
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becomes immobile. The first four above mentioned mechanisms all remove mass
permanently. However, if the contaminant concentration in the aquifer gets sufficiently low,
the contaminants sorbed to the organic matter will re-enter solution, thus becoming mobile
again and becoming a source of contamination. The model accounts for both sorption and re-
solution of contaminants.
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6.0 CONTAMINANT
TRANSPORT MODEL
DEVELOPMENT
Chevron Products Company
Salt Lake Refinery
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December 1996
CHAPTER 6
CONTAMINANT TRANSPORT MODEL DEVELOPMENT
This following discussion applies only to calibration of the benzene and toluene models
using data from within and downgradient from the Oily Dump. Details regarding simulation
of plumes associated with the North Tank Farm and Ponds 2 and 3 simulations are presented
in Chapter 9.
6.1 CODE
Contaminant transport in groundwater at the Chevron Refinery was modeled using
MT3D (Zheng, 1994). MT3D is a modular three-dimensional transport model for simulation
of advection, dispersion and chemical reactions of dissolved constituents in groundwater.
MT3D estimates the behavior of a groundwater contaminant plume by numerically solving the
partial differential equation which describes transport of contaminants in groundwater. The
MT3D users manual (Zheng, 1994) presents this partial differential equation and defines
terms found in the equation. MT3D was written to be run on an IBM-PC or compatible. The
code was written in ANSI Fortran 77 and was compiled using the Lahey F77L-EM/32 compiler
version 5.20. MT3D was designed to run on 80386/486 systems with math coprocessors
in 32-bit protected mode using extended memory. For this project, MT3D was run on a 133
MHZ Pentium processor with 32 megabytes of available memory.
MT3D offers 4 different solution techniques to solve the advective-dispersive-reactive
partial differential equation. The four solution techniques are:
• The method of characteristics (MOC)
• The modified method of characteristics (MMOC)
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• The hybrid method of characteristics (HMOC) which combines the strength of MOC for
eliminating numerical dispersion with the computational efficiency of MMOC
• Finite difference.
The solution technique used is totally dependent on the conditions that MT3D is to be
run under. For this model, the finite-difference solution technique was used.
MT3D is written with a modular structure similar to that used by MODFLOW. It
includes a main program and several independent subroutines called modules. The modules
are grouped into packages that deal with certain features such as advection, dispersion, and
reaction. MT3D must be run in conjunction with a block-centered finite-difference flow model
such as MODFLOW. MT3D retrieves groundwater flow information from the groundwater
flow model output and incorporates these flow data into the contaminant transport model.
As with the flow model, the software package PMWIN was used to create the input
files needed by MT3D. PMWIN includes features that were also used to aid in interpreting the
model results. PMWIN saves the concentration data in a format that can be exported into the
contouring software package SURFER (Golden Software, 1995). PMWIN and SURFER were
both used extensively during the calibration, simulation, and sensitivity stages of the
investigation.
6.2 GRID
The same grid that was used for the groundwater flow model was used for the
contaminant transport model with one difference. The area evaluated during calibration of the
contaminant transport model is significantly smaller than the area covered by the entire flow
model (see figure 3-1). The larger area for the flow model is required because the flow model
boundaries should be set at known hydrologic boundaries such as rivers or far enough away
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from the area of interest so that inaccurate boundary conditions will not have an effect on the
area of interest. The area to be covered by the contaminant transport model is not limited by
these conditions so a smaller area can be modeled. The smaller calibration area resulted in
shorter run times, making the calibration effort more efficient. The entire area evaluated
during calibration of MT3D has a 50' x 50' grid spacing. The uniform grid spacing and the
chosen range of longitudinal dispersivity made it possible to use the finite difference solution
technique which has a very good mass balance and is more computationally efficient than the
other solution techniques.
6.3 INITIAL CONDITIONS
Because of the transient nature of a contaminant transport model (i.e. changing with
time), the initial or starting conditions need to be specified. The initial conditions include the
period of time to be modeled, the source cell locations, and initial cell concentrations. A
contaminant plume can be modeled from the time of the spill or from intermediate stages of
plume development. If the model begins at the time of the spill, only the concentration of the
source cells need to be specified. If the model begins at an intermediate stage of plume
development, the concentration of the cells which define the plume at that time need to be
specified. MT3D is set up such that the initial cell concentrations specified will also define
the concentration of constant concentration cells which will be the source of the contaminant
plume.
6.3.1 Time Period
For the purposes of calibration, contamination of groundwater at the Oily Dump was
assumed to begin in 1953, year in which sludges from a sulfuric acid gas oil treatment plant
were initially disposed of into pits that became known as the Oily Dump. Sludges from the
sulfuric acid gas oil treatment plant were disposed of at the site until 1960. The site received
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miscellaneous debris and other sludges periodically until 1980 (EarthFax, 1994b). Since no
data are available to determine when the benzene and toluene plumes began, the time period
to be used for model calibration started when disposal began in 1953 and ended in 1994 (the
year during which the plume data was collected). Therefore, the model was calibrated by
running the contaminant transport model over a period of 41 years and comparing the results
to the measured October 1994 concentrations.
6.3.2 Source
As mentioned above, the source for the benzene and toluene plumes was modeled
using constant concentration cells. The location and concentration of constant concentration
cells was determined mostly during calibration. Some guiding principles were used to locate
constant concentration cells and to determine their concentration during calibration. These
principles are discussed below. Constant concentration cells were located at or near monitor
wells and piezometers that have at some time exhibited free-phase hydrocarbons on the
groundwater surface. Although much of the Oily Dump may have contributed to groundwater
contamination in some way, only that portion of the Oily Dump where free-phase
hydrocarbons had been consistently measured was defined with constant concentration cells.
Care was taken so that constant concentration cells would only add to the contaminant mass
and not remove it. If a low concentration constant concentration cell is located downgradient
from a high concentration cell, the low concentration cell would effectively remove
contaminant mass from the model. This would not reflect natural conditions and would create
mass balance problems. To insure that these problems did not occur, it was ensured that
downgradient constant concentration cells would have a higher concentration than any
upgradient constant concentration cells. The layout of constant concentration cells for the
benzene and toluene models can be seen on Figures 6-1 and 6-2, respectively.
The concentrations of all constant concentration cells were held constant over the 41
year calibration period. Although, it is extremely likely that source concentrations did
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decrease over time, the concentrations were not varied over time because data were not
available to support this hypothesis. When data did not exist to support a decision, a
conservative estimate was made during the modeling effort.
6.4 PARAMETER ZONATION
MT3D allows the model user to define zones for two of the input parameters, porosity
and dispersivity. The other parameters can only be specified for an entire model layer.
Although MT3D allows porosity and dispersivity to be varied spatially, a single value was
used for each parameter. The decision to not vary dispersivity or porosity spatially during
calibration was made because no data were available to justify any spatial variations.
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7.0 CONTAMINANT
TRANSPORT MODEL
CALIBRATION
Chevron Products Company
Salt Lake Refinery
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December 1996
CHAPTER 7
CONTAMINANT TRANSPORT MODEL CALIBRATION
7.1 GENERAL
During calibration of the contaminant transport models, one for benzene and one for
toluene, initially-assumed transport and aquifer parameters were varied until the desired results
were achieved. MT3D was run for a calibration period of 41 years and parameters were
varied until the models predicted essentially the same plume extents as seen in the fall of
1994. During calibration, three transport parameters and one hydraulic parameter were
varied. Transport parameters which were varied were the decay rate, the source
concentrations and locations, and the fraction of organic carbon, which affected the
retardation factor. The groundwater flow model was refined by varying hydraulic conductivity
values and distribution during calibration of the benzene and toluene contaminant transport
models. The general discussion in this chapter can be applied to both the calibration of the
benzene and the toluene models unless noted otherwise.
The objective of contaminant transport model calibration is different than the objective
of the groundwater flow model calibration. For groundwater flow model calibration, the
measured potentiometric surface is matched as closely as possible while maintaining an
approximate mass balance between groundwater inflow and outflow. The primary objective
of the contaminant transport model calibration was to approximate the extent of the benzene
and toluene plumes with a mass balance discrepancy of less than 0.5%. The secondary goal
of contaminant transport model calibration was to approximate the plume's interior
concentrations as close as possible to measured values. Plume interior concentrations were
deemed acceptable if they were above the measured value because this would provide a
more conservative estimate during simulation.
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In the early phases of model calibration, it became evident that it would not be possible
to match the concentrations measured at all of the observation points without making some
unjustifiable assumptions. Care was taken during calibration that no parameter was varied
from the initial estimate unless data could be provided to verify that parameter distribution or
range of values were within the conditions present in the model area. For example, the
concentration at almost all observation points could be matched quite closely if the source
concentrations were decreased steadily over the 41 years since disposal began. However,
no data were available to justify how source concentrations decreased over time or to
estimate initial concentrations. Since no data were available, the source concentration was
kept uniform over the entire 41 year calibration period, thereby making the models more
conservative. The uniform concentration causes a more conservative model because the
uniform source concentrations are higher than those actually measured during the fall of
1994. This results in a larger mass of contaminant in the groundwater for the calibrated
model than was measured in the field. The larger amount of contaminant mass at the
beginning of simulations results in a more conservative estimate of plume behavior.
7.2 CALIBRATION RESULTS
The calibrated benzene and toluene plumes can be seen on Figures 7-1 and 7-2,
respectively. These figures can be compared to the plots of measured concentrations for
benzene and toluene on Figures 5-1 and 5-2, respectively. Tables 7-1 and 7-2 contain
location and concentration data for sampling points in the study area for benzene and toluene,
respectively. The shapes of the measured and modeled plumes agree well in the area of
interest west of the Oil Drain. However, the shape of the measured and modeled plumes at
the north end of the Oily Dump do not agree well. This difference is likely caused by
variations in how SURFER and MT3D calculate plume extents. A discussion of how SURFER
and MT3D determine plume extents follows.
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SURFER (Golden Software, Inc., version 6, 1995) takes the irregularly spaced data
points obtained from monitor wells and estimates the plume boundaries in areas where no
data exist. These estimates are of necessity based on trends which the program observes
within areas where data do exist. As a result, the edges of the plume boundaries estimated
by SURFER may not reflect reality.
The reliability of a SURFER generated plume boundary is dependent on the density of
observation points near the boundary. This problem is of particular concern at the north edge
of the Oily Dump, where only a limited number of observation points exist to identify the
plumes boundary. Furthermore, since SURFER is purely a data manager, the program does not
account for flow direction, natural boundaries, such as the Oil Drain, and hydrologic
conditions, such as hydraulic conductivity, all of which greatly affect the position of the plume
boundaries.
Data generated by MT3D are estimated on a regular grid spacing. Furthermore, MT3D
accounts for flow direction, natural boundaries and hydrologic conditions. As a result, the
concentration data contoured from MT3D tend to be much tighter than the SURFER contours
plotted from actual field data. Hence, variations in the actual and predicted plume boundaries
were not considered significant if they occurred in areas where actual data do not exist.
A comparison of Figures 5-2 and 7-2 indicates that the extents of the toluene plume
associated with the Oily Dump have been predicted very well by the calibration model. The
measured and calibrated concentration at the furthest downgradient well (WP-13) are within
4 ug/l. Although a comparison of Figures 5-1 and 7-1 calibration of the benzene model is not
as precise as that for toluene, it is still considered acceptable. The primary objective of
matching the extents of the plumes have been met by both models. The secondary objective
was met better by the toluene model than by the benzene model.
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The mass balance error was 8.7 x 10 % and -0.42% for the benzene and toluene
models, respectively. These mass balance errors are below the acceptance criterion of 0.5%.
A negative mass balance error denotes that more mass is leaving the system than is entering.
Although a Root Mean Square error (RMS) and Mean Average Error (MAE) were calculated to
evaluate the sensitivity of the benzene and toluene models (see Section 8.3 of this report)
they are not good measures of the primary objective of matching the plume's extent.
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8.0 MODEL SENSITIVITY
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CHAPTER 8
MODEL SENSITIVITY
8.1 SENSITIVITY ANALYSIS PROCEDURE
The purpose of a sensitivity analysis is to quantify the uncertainty in the calibrated
model caused by uncertainty in the estimates of aquifer parameters, stresses, and boundary
conditions (Anderson and Woessner, 1992). Sensitivity analyses on the models were
performed by varying the magnitude of the hydraulic conductivity, anisotropy factor, leakance
coefficient, recharge, drain conductance, bottom elevation of the shallow aquifer, longitudinal
and horizontal transverse dispersivity, porosity, bulk density, molecular diffusion coefficient,
decay rate, and the activity coefficient (fraction of organic content) in the soils. The
parameter values were increased and decreased incrementally (plus and minus 10, 20 and
50%) to determine the effect on the model results. Sensitivity analyses were performed on
the steady-state groundwater flow model and the toluene contaminant transport model and
their associated calibrated values for all parameters. Sensitivity was not performed on the
calibrated benzene model since the sensitivity of the toluene model would indicated what the
benzene model was sensitive to and only be duplicated work.
The sensitivity analysis was first run on the parameters affecting the groundwater flow
model. Following the sensitivity analysis for the groundwater flow model, a sensitivity
analysis was run on the parameters affecting the toluene contaminant transport model. In
that the flow model results are an input to the contaminant transport model, the parameters
that the flow model was most sensitive to were also tested to see their effect on the
contaminant transport model.
The sensitivity of the model to variations in the parameter values was determined by
numerically comparing the calibrated model output with the output following parameter
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variation. The MAE, RMS, water balance, and maximum variation over the model area were
determined and used for comparison purposes. The MAE and RMS were determined using the
difference between the calibrated model results and the modified model. For example, model
results after varying hydraulic conductivity were compared to the calibrated model results.
The residuals (difference between modified and calibrated model results) used to calculate the
RMS and MAE were calculated for the entire grid and not just at places where measured
variations were noted. Because a residual was calculated for all cells within the model area,
the inactive cells were included in the error calculation. Including the inactive cells in the error
calculation results in lower error values. However, this is not a problem since the error values
calculated for the sensitivity analysis have all been calculated in the same manner. It is the
relationship between the error values and not the actual value that is important in a sensitivity
analysis.
8.2 GROUNDWATER FLOW MODEL SENSITIVITY
A summary of the sensitivity analysis results is contained in Table 8-1. As suggested
by this table, the groundwater flow model is most sensitive to changes in hydraulic
conductivity, drain conductance, and the aquifer bottom elevation. The flow model is least
sensitive to changes in leakance.
The sensitivity of the flow model to changes in the hydraulic conductivity appears to
be greatest when the conductivities are decreased (see Table 8-1). Hydraulic conductivities
modified between 80% and 120% of the calibrated values produce maximum variations in the
predicted head of less than 1 foot.
As indicated previously, the calibrated hydraulic conductivities fall within the range of
values determined from the field tests performed for this investigation. In addition, the
goodness-of-fit criteria for the modeling effort were met during calibration. This indicates
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that, although the model is sensitive to variations in the hydraulic conductivity, there is a high
degree of confidence in the calibrated values.
As presented in Table 8-1, the flow model is moderately to highly sensitive to the drain
conductance. Reducing the drain conductance has a greater effect on the model than
increasing the drain conductance. The model is only moderately sensitive to variations of plus
or minus 20% of the calibrated values. Since the drain discharge data from the Marketing
facility drain were used and duplicated during the model calibration, the calibrated magnitudes
of this parameter are considered appropriate for the model.
The anisotropy factor was modified during the sensitivity analyses. The flow model
was only moderately sensitive to variations of plus or minus 50% of the calibrated value. An
anisotropy factor of less than one, as used by MODFLOW, defines the principal axis of the
hydraulic conductivity ellipse in the east-west direction. Although this is the primary direction
of anisotropy identified by the aquifer tests (see 1992 flow model report. Section 3.2), an
anisotropy factor of 0.5 (i.e., 2:1 ratio) causes a maximum variation from the calibrated head
value of nearly 2 feet. Moderate changes in the anisotropy factor (i.e., 0.8 to 1.2) result in
minor changes to the MAE, RMS, and mass balance. Since limited anisotropy data were
available from pump tests, and since the model calibrated adequately with an anisotropy ratio
of 1:1, the calibrated magnitude of this value is considered acceptable.
The flow model has a minor sensitivity to the rate of recharge. The flow model is
slightly more sensitive to an under-estimation of recharge than an under-estimation (see Table
8-1). No field data are available for comparison of the recharge values. However, in
comparing the degree of resemblance between the calibrated and initial potentiometric
surfaces, the calibrated magnitudes of this parameter are considered appropriate for the
model.
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From Table 8-1, variations in the leakance coefficient have a negligible influence on the
performance of the flow model. Leakance variations of 50 to 150% cause no changes in the
model results. Although only limited field data existed for defining the magnitude of this
parameter, the variations used as model input data were derived in a sound manner, indicating
a reasonable degree of confidence in the data.
The model is moderately sensitive to the bottom elevation of the shallow aquifer.
Bottom elevation changes of -10 to 5 feet have a moderate effect on the model. Only large
increases in the aquifer bottom elevation (10 feet and greater) tend to impact the model
dramatically (see Table 8-1). This response is expected since the aquifer thickness in some
areas is less than 15 feet. A bottom elevation increase of 10 feet in these areas results in an
aquifer thickness of 5 feet or less. A change of this magnitude warrants the response which
was observed.
8.3 CONTAMINANT TRANSPORT MODEL SENSITIVITY
A summary of the sensitivity analysis for the contaminant transport model can be
found in Table 8-2. As suggested by the table the model is most sensitive to changes in
source concentration, hydraulic conductivity, drain conductance, and effective porosity. The
mass balance for the contaminant transport model is not presented in Table 8-2 because it
does not provide information on the sensitivity.
As would be expected, the transport model is highly sensitive to source concentrations.
The error resulting from varying source concentration is much higher than for any other
parameter. The source concentration being most sensitive is expected since a large portion
of the contaminated groundwater is in the same area as the constant concentration cells.
Constant concentration cells account for approximately 30% of the contaminated model cells
and, since the concentration of these cells have been reduced or increased by up to 50%
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during the sensitivity analysis, the large error seen can partially be attributed to the mere
presence of the constant concentration cells. Even considering the constant concentration
cells, the model is by far the most sensitive to source concentration
The calibrated source concentrations are felt to be reasonable when taking into
account the goal of this model. The assumed source concentrations are equal to or higher
than concentrations measured in the groundwater beneath the Oily Dump. Furthermore, since
the calibrated constant concentration cells were not decreased as a function of time during
calibration, any simulation results are considered to be conservative.
As was the case with the groundwater flow model, the contaminant transport model
is very sensitive to hydraulic conductivity. The sensitivity of the model is slightly greater
when the hydraulic conductivities are increased than when they are decreased. As discussed
in Section 8.2 the hydraulic conductivities are within the range of measured values for the
site. Furthermore, using these calibrated values, a good re-calibration of the groundwater flow
model was achieved. This indicates that, although the model is sensitive to hydraulic
conductivity, there is a high degree of confidence in the re-calibrated values.
The transport model is also highly sensitive to effective porosity. This is to be
expected with the low calibrated values for the retardation factor and decay rate. The model
is advection dominated (i.e. the spread of the contaminant is dominated by the physical
movement of the groundwater). MT3D calculates groundwater flow velocity based on the
gradient, the hydraulic conductivity, and the effective porosity. As a result, changes in both
porosity and hydraulic conductivity have a direct impact on the groundwater flow velocity.
The porosity is also a parameter used to calculate the retardation factor. The calibrated
effective porosity value is within the range of effective porosities published for all the soil
types found in the shallow aquifer and, therefore, considered to be adequate.
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The transport model is very sensitive to the drain conductance. As with the flow
model the contaminant transport model is more sensitive to decreases in drain conductance
than increases. The sensitivity of the model to the drain conductance is expected since
modifying drain conductance changes the groundwater flow conditions as well as the rate at
which the contaminant is removed from the model. No information was available on the Oil
Drain's conductance but successful flow and transport model calibrations indicates
appropriate values were used.
The sensitivity of the transport model to the bulk density and activity coefficient will
be discussed together since both are directly related to the retardation factor calculated by
MT3D and affect the model equally. The transport model is moderately sensitive to these
parameters. An increase in these parameters (resulting in a similar increase in the retardation
factor) causes the model to be slightly more sensitive than if the values were reduced.
Confidence is high in the calibrated value of bulk density since it is based on field
measurements. Confidence is also high in the activity coefficient. The activity coefficient is
calculated based on the fraction of organic carbon in the aquifer and the octanol water
coefficient (see Appendix E). The value used for the fraction of organic content is within the
range of values measured in the field. The value used for the octanol water coefficient is a
published value found in many texts.
The transport model is moderately sensitive to changes in the reaction rate (decay
rate). The model is more sensitive to decreases in the reaction rate than to increases.
Although the values used for the reaction rate are below the range of published values for
toluene and close to the lowest published value for benzene, the values used are considered
acceptable because they were required to produce adequate calibration.
The transport model has a minor sensitivity to both longitudinal and horizontal
transverse dispersivity. The model is more sensitive to changes in longitudinal dispersivity.
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The calibrated dispersivites are consistent with research results presented in the literature and,
therefore, considered appropriate.
The transport model is insensitive to changes in molecular diffusion. Variations of plus
and minus 50% caused no significant changes in model predictions.
When looking at the sensitivity analysis results for the contaminant transport model,
it should be noted that, in many cases, there was little or no site-specific data. In some of
these cases, values from the literature were used. In others, the value was completely
derived during calibration. The sensitivity analysis results would seem to suggest that more
detailed information on source concentration, effective porosity, and drain conductance should
be collected. To counteract the potential deficiency, whenever a parameter needed to be
estimated during calibration, the value was determined in a manner such that any simulations
performed using the calibrated model would give a conservative result. Using this approach,
the resulting output was considered to be worst case.
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9.0 SIMULATION
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CHAPTER 9
SIMULATION
Simulations were run for three areas within the refinery- the Oily Dump, the North Tank
Farm, and Ponds 2 and 3. The most detailed simulation was performed for the Oily Dump
since the greatest amount of information was available for this site and it has the highest
potential for causing groundwater contamination off Chevron property.
9.1 OILY DUMP SIMULATION PROCEDURE
To begin the simulation portion of this project the groundwater flow model had to be
modified to reflect the hydrologic conditions expected in the future. Past and current
remediation projects at the refinery are expected to significantly change the potentiometric
surface from the one that the contaminant plumes were generated under. Currently ongoing
remediation of the Landfill Waste Management Area (LWMA) will result in cleanup of the Oily
Dump, the Landfill, remaining portions of the Bonneville Canal east of the Oil Drain, and
numerous ponds which were part of the Wastewater Treatment System. This remediation
project will close all ponds except Ponds 2 and 3 and the remaining portion of the Bonneville
Canal west of the Oil Drain. The sludges excavated from the ponds and the Bonneville Canal
will be added to the sludges and waste in the LWMA and then be stabilized. The stabilized
waste will then be deposited in a cell over the LWMA as indicated in Figure 1-2.
The calibrated groundwater flow model was modified to reflect the anticipated
changes due to past and ongoing remediation projects. Modifications to the flow model
included:
• Removing the drain cells that represented the Bonneville Canal east of the Oil Drain.
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• Modifying the zones of recharge to reflect the removal of ponds which were part of the
Wastewater Treatment System.
• Removing the groundwater mound under the RWMA.
Physical removal of Bonneville Canal and pond influence will be completed within the
next year. Although the source of the groundwater mound under the former reservoir was
removed in 1993 by closure of the RWMA, this mound was present during development of
the plumes and had not fully dissipated prior to October 1994 when the data were collected
that were used for model calibration. However, potentiometric surface data collected in
October 1995 and April 1996 indicate that the mound is dissipating at a rate of about 1 foot
per year (EarthFax Engineering, 1995, EarthFax Engineering, 1996). Suggesting that the
groundwater mound will fully dissipate in less than 5 years. Since simulations were run over
a period of 100 years, a feature that is present for less than 5 years is not expected to have
a significant effect on simulation results.
Ponds 2 and 3 will not be removed during remediation of the LWMA. Instead, bottom
sediments will be remediated utilizing circulation of oxygen and nutrient rich spring water from
the Bonneville Spring located on refinery property. In addition, pond water will be available
for fire-water storage and as part of a facility wetland enhancement project. As a result,
constant head cells were added to the area of Pond 3 (the upstream-most pond) to increase
the gradient west of the Oil Drain, while still allowing MODFLOW to calculate flow conditions
west of the Oily Dump based on the calibrated hydrogeologic parameters. The resulting
steady-state, simulated potentiometric surface is provided in Figure 9-1. This potentiometric
surface assumes that the Bonneville Canal / North Tank Farm Groundwater Intercept System
is in operation.
Three options were simulated for both benzene and toluene, including:
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1) Option 1 - Source cells were kept at the assumed concentrations used for calibration.
This represents a worst-case condition. This option allows a prediction of future
conditions if remediation of the Oily Dump resulted in no removal of the source of
groundwater contamination for that area.
2) Option 2 - The source cells were retained but the maximum concentration was reduced
to 50 ug/l. Calibrated source cells with a concentration less than 50 ug/l were left
unchanged. This option allows a prediction of future conditions if remediation of the
Oily Dump does not result in complete removal of the sources of groundwater
contamination in the area.
3) Option 3 - Assumes complete elimination of all sources of groundwater contamination
at the Oily Dump has been achieved. Under this option, all source cells were removed
and the fate of the contaminant mass already in the groundwater was modeled. The
goal of the current remediation project is to achieve this condition.
9.2 OILY DUMP SIMULATION
The starting concentrations for all Oily Dump simulations are the calibrated benzene
and toluene plumes. Using the calibrated plumes as the starting concentrations for the Oily
Dump simulations make those simulations more conservative than if the actual measured
plumes were used as the starting concentrations for simulation. The calibrated plumes have
more contaminant mass west of the Oil Drain and as a result of this additional mass the plume
will spread faster and farther than if measured values were used as the starting
concentrations.
9.2.1 Benzene Simulation Results
For the first option (unchanged source concentrations) the benzene plume reached
equilibrium conditions between the 20th and 30th years of simulation. That is, the rate at
which benzene was introduced to groundwater was the same as the rate at which the
benzene was removed by bio-degradation and volitization. After reaching equilibrium, the
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plume's extents and interior concentrations did not change during the remainder of simulation.
The simulation predicts that the extent of the benzene plume will actually regress in the
future, probably due to a decrease in the hydraulic gradient following dissipation of the RWMA
groundwater mound.
The predicted worst-case benzene plume under equilibrium conditions can be seen on
Figure 9-2. Under these conditions, the maximum downgradient extent of the benzene plume
is predicted to be approximately 900 feet upgradient from Redwood Road (i.e. well within the
Chevron property boundary).
The benzene plume for option 2 (reduced source concentrations) reaches equilibrium
after 30 to 40 years of simulation. Under these conditions, it is predicted that the maximum
downgradient extent of the predicted reduced-source plume will be approximately 200 feet
less than under current conditions.
The predicted reduced-source benzene plume under equilibrium conditions can be seen
on Figure 9-3. Under these conditions, the maximum downgradient extent of the benzene
plume is predicted to be over 1000 feet upgradient from the Chevron Property boundary.
When the source has been removed, the model predicts that the benzene plume will
completely disappears within 30 and 40 years. The predicted extent of the benzene plume
after 30 years, assuming source removal, can be seen on Figure 9-4. Under this condition,
the maximum downgradient extent of the benzene plume will remain well within the Chevron
property boundary.
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9.2.2 Toluene Simulation Results
Under worst case conditions (i.e.. Option 1) the toluene plume achieves equilibrium
after 180 to 190 years of simulation. Under these conditions, it is predicted that the
maximum downgradient extent of the predicted worst-case toluene plume will be
approximately 400 feet upgradient from Redwood Road (i.e. well within the Chevron property
boundary). The predicted worst-case toluene plume under equilibrium conditions can be seen
on Figure 9-5.
Under Option 2 assumptions (i.e. reduced source concentrations) the toluene plume
reaches equilibrium after 90 to 100 years of simulation. Under these conditions, it is
predicted that the maximum downgradient extent of the predicted reduced-source plume will
be approximately 100 feet less than under worst-case conditions.
The predicted reduced-source toluene plume under equilibrium conditions can be seen
on Figure 9-6. Under these conditions, the maximum downgradient extent of the toluene
plume is predicted to be approximately 500 feet upgradient of Redwood Road, the Chevron
property boundary..
With the source removed the toluene plume has a maximum concentration of less than
4 ug/l after 200 years of simulation. After 180 years the maximum downgradient extent
begins to regress. The maximum downgradient extent of the 1 ug/l contour line is 300 feet
upgradient of the Chevron property boundary. The predicted toluene plume after 200 years
can be seen on Figure 9-7. Under this condition, the maximum downgradient extent of the
benzene plume will remain well within the Chevron property boundary.
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9.3 NORTH TANK FARM AND PONDS 2 AND 3 SIMULATION PROCEDURE
Simulations involving changes to the North Tank Farm Groundwater Intercept System
and Ponds 2 and 3 were run to evaluate the following conditions:
• The potential extent of plume development if the Bonneville Canal / North Tank Farm
Groundwater Intercept System is turned off and
• the potential for the bottom sludges in Ponds 2 and 3 to act as a source for
groundwater contamination, with a plume developing that extends off Chevron
property.
Given the general lack of toluene in the North Tank Farm plume and the regulatory concern
for benzene, these simulations were restricted to benzene. The lack of toluene in the North
Tank Farm plume was established by a query made on the Chevron Salt Lake Refinery
database administered by EarthFax Engineering on July 1996.
In addition to the changes to the groundwater flow model mentioned in Section 9.1,
the drains which represented the Bonneville Canal / North Tank Farm Groundwater Intercept
System were removed for this simulation. This had a major impact on the potentiometric
surface in the vicinity of the North Tank Farm as can be seen by comparison of Figures 9-1
and 9-8. Under this condition, a fairly uniform gradient is predicted to exist between the North
Tank Farm and the Oil Drain. However, the potentiometric surface west of Ponds 2 and 3 is
not predicted to be significantly affected by the groundwater intercept system (whether on
or not).
Once the groundwater flow model had been modified, the eastern boundary of the
MT3D model area was extended from the reduced calibration grid to grid column 93.
Constant concentration cells were added to the model along the Groundwater Intercept
System as shown on Figure 9-9. The concentration of the cells were set to the maximum
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benzene concentration historically measured within the North Tank Farm to make the
simulation conservative (4620 ug/l measured at monitor well EF-2 in January 1991).
Constant concentration cells were also added along the western side of the Landfarm.
Although historic data indicated that benzene concentrations in this area are significantly
lower than measured within the North Tank Farm, the concentration of these cells were also
set equal to 4620 ug/l to provide a worst case simulation.
In addition to the constant concentration cells added to represent the North Tank Farm
and Landfarm groundwater contamination, constant concentration cells were added along the
western boundary of Ponds 2 and 3 as shown on Figure 9-9. The benzene concentration was
set to 100 ug/l, based on a maximum benzene concentration measured in monitor wells S-10
and S-11 of 86 ug/l.
Simulations accounting for the non-operating Groundwater Intercept System and Pond
2 and 3 contributions were run for periods of 30 and 100 years. These simulations were run
concurrently with the worst case benzene simulation for the Oily Dump (i.e.. Option 1) to
evaluate the potential for plumes from separate sources to combine and create a larger plume.
9.4 NORTH TANK FARM SIMULATION RESULTS
After 30 years, the benzene plume issuing from the North Tank Farm is predicted to
extended west into the southeast corner of the Landfill and south approximately 130 feet from
Second North if the Groundwater Intercept System is shut down. The plume is predicted to
extend almost to the northeastern corner of the RWMA (see on Figure 9-10). It is also
predicted that the downgradient edge of the plume will extend to the edge of the LWMA
closure cell.
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Within 100 years of shutting down the Groundwater Intercept System, the benzene
plume emanating from the North Tank Farm is predicted to reach equilibrium conditions. The
western tip of the benzene plume is predicted to extend approximately 100 feet beneath the
LWMA closure cell (see Figure 9-11). The southern extent of the plume is predicted to be 160
feet north of the refinery administration building. Under these worst-case conditions, the
North Tank Farm plume and Oily Dump plume are not predicted to combine.
It should be emphasized that the above simulations assume a worst-case situation of
high source concentrations of benzene constantly flowing from the North Tank Farm and
Landfarm. Even if the Groundwater Intercept System is shut down before remediation is
complete, it is reasonable to assume that source concentration will decrease with time (due
to biodegredation and volitization). Hence, the maximum extent of the benzene plume should
be less than those predicted by the model and represented on Figures 9-10 and 9-11.
9.5 PONDS 2 AND 3 SIMULATION RESULTS
After 30 years, the simulated benzene plume originating at Ponds 2 and 3 is predicted
to achieve equilibrium. Thus, given a constant source concentration, the plume after 100
years is predicted to be the same as after 30 years (see Figures 9-10 and 9-11. The plume
is predicted to extend a maximum of approximately 160 feet beyond the Oil Drain. The plume
simulated does not come in contact with the North Tank Farm or the Oil Dump plumes.
Again, it should be emphasized that the plumes emanating from Ponds 2 and 3 and
represented on Figures 9-10 and 9-11 was simulated using worst-case assumptions. The
actual extent of the plume is likely to be significantly less.
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10.0 CONCLUSIONS
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CHAPTER 10
CONCLUSIONS
A quasi three-dimensional steady state groundwater flow model and a transient
contaminant transport model were developed for the shallow unconfined aquifer beneath the
Chevron Salt Lake Refinery. These models were developed to demonstrate that contaminant
plumes which have developed on the site will not migrate off Chevron property.
The flow model was successfully calibrated for steady-state flow conditions. All of the
pre-determined error criteria were effectively met. Average water-level differences,
determined by the Mean Average Error, between the initial and predicted potentiometric
surfaces were less than 1.0 foot. Flow patterns across boundaries and to drain systems were
reproduced successively, and the water balance was completed with minimal error.
Therefore, there is good confidence in the groundwater flow model as an accurate input to
the contaminant transport model.
The contaminant transport models for benzene and toluene were successfully
calibrated to the October 1994 concentration data. The primary calibration objective was met
by both the benzene and toluene models. The secondary objective was met to a lesser extent
by both models, the toluene model being the better of the two. The contaminant transport
models were calibrated in a manner to make simulations as conservative as possible.
Therefore, simulations performed based on the calibrated models will return conservative
results.
Simulations of the benzene and toluene models for the Oily Dump were run for a period
of up to 200 years for three possible conditions. The three conditions are: unchanged source
concentrations (worst case), reduced source concentrations, and zero source concentrations.
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Currently, a remediation project is underway to remove the source of the benzene and toluene
plumes from the area of the Oily Dump. The third condition was run to represent expected
conditions after remediation has been completed. The other two conditions represent more
conservative assumptions.
The simulations performed with the Oily Dump benzene model demonstrated that there
is no reasonable potential for the plume to extend off Chevron property. Even under the most
conservative conditions, the plume is predicted to reach equilibrium and not extend beyond
the Old Salt Lake Sewer Drain. Under expected conditions, that being removal of the source,
the benzene plume is predicted to completely disappears within 30 to 40 years. There is a
high level of confidence in these conclusions since the model was successfully calibrated and
very conservative conditions were assumed for the simulations.
The simulations performed with the Oily Dump toluene model demonstrate that there
is little danger of the plume extending beyond Chevron property boundaries. Even under the
most conservative conditions the plume is predicted to reach equilibrium within 180 to 190
years and still be approximately 400 feet from Redwood Road. Under expected conditions,
that being the removal of the source, the toluene plume after 200 years is predicted to have
a maximum concentration of 4 ug/l and be regressing.
Given the calibration and simulation results, it is highly unlikely that the benzene or
toluene plumes originating at the Oily Dump will extend off Chevron property. The facts that
the calibrated retardation factors are almost negligible for benzene and toluene, that the
calibrated decay rate for toluene is less than the lowest value reported in the literature and
that the calibrated benzene decay rate is close to the lowest reported value, combine to make
the simulations conservative in nature. In addition to the very low retardation factors and
decay rates, the simulations are more conservative because the calibrated model and starting
point for simulations estimates more contaminant mass in the west field than was actually
10-2 EarthFax Engineering, Inc
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
measured. The excess mass results in a plume that can spread faster and farther than if
measured values were used as the starting concentrations for the simulations. All of these
factors combine to provide convincing evidence that there is no reasonable potential of the
benzene or toluene plume extending off Chevron property.
A simulation was run to determine if a benzene plume originating at the North Tank
Farm would extend off Chevron property if the Bonneville Canal / North Tank Farm
Groundwater Intercept System was turned off. The simulation was run using results of the
Oily Dump calibration and conservative assumptions. Although, a large simulated plume does
develop within 100 years, the plume is not predicted to extend off Chevron property nor will
it combine with plumes from the Oily Dump or Ponds 2 and 3.
A simulation was run to determine if a benzene plume originating at Ponds 2 and 3
would extend off Chevron property. The simulation was run using results of the Oily Dump
calibration and conservative assumptions. The simulated benzene plume is predicted to
achieve equilibrium conditions within 30 years and shows no signs of extending off Chevron
property or combining with either the Oily Dump plume or the North Tank Farm plume.
10-3 EarthFax Engineering, Inc
11.0 REFERENCES
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
CHAPTER 11
REFERENCES
Anderson, M.P. and W.W. Woessner. 1992. Applied Groundwater Modeling. Academic
Press, Inc. San Diego, California.
Autodesk, Inc. 1992. AutoCAD Reference Manual, Release 12. Publication 100186-02.
Chiang, W.H. and W. Kinzelbach. 1996. Processing MODFLOW for Windows. Version 4.0.
Department of Civil Engineering, Kassel University. Kassel, Germany.
Dames and Moore, Inc. 1990. Evaluation of Analytical Results. Four Quarters of Ground
Water Sampling during 1989. Job No. 07987-026-31. Dames and Moore, Inc. Salt
Lake City, Utah.
Doherty, John. 1990. MODINV, MODFLOW Parameter Optimization. Australian Centre for
Tropical Freshwater Research. James Cook University. Townsville, Qld. Australia.
EarthFax Engineering, Inc. 1992. Spring 1992 Steady-State Groundwater Flow Model.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
City, Utah.
EarthFax Engineering, Inc. 1994a. Fall 1994 Semi-Annual Consent Order Sampling Report.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
EarthFax Engineering, Inc. 1994b. RCRA Facility Investigation Report. Prepared for Chevron
U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake City, Utah.
EarthFax Engineering, Inc. 1995. Fall 1995 Semi-Annual Consent Order Sampling Report.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
EarthFax Engineering, Inc. 1996. Spring 1996 Semi-Annual Consent Order Sampling Report.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
EarthFax Engineering, Inc. 1996. Corrective Action Plan. Prepared for Chevron Products
Company., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake City, Utah.
City, Utah.
City, Utah.
City, Utah.
11-1 EarthFax Engineering, Inc
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
Freeze, R.A. and J.A. Cherry. 1979. Groundwater. Prentice-Hall, Inc. Englewood Cliffs,
New Jersey.
Geowest Golden, Inc. 1991. Amoco Remote Hazardous Waste Management Facility. 1990
Annual Report. Job No. 8801.02. Geowest Golden, Inc." Salt Lake City, Utah.
Golden Software, Inc. 1995. SURFER for Windows Version 6 Reference Manual. Golden
Software, Inc. Golden, Colorado.
McDonald, M.G. and A.W. Harbaugh. 1984. A Modular Three-Dimensional Finite-Difference
Groundwater Flow Model. U.S. Geological Survey Open-File Report 83-875. Reston,
Mott, H.V. 1995. A Model for Determination of Phase Distribution of Petroleum
Hydrocarbons at release sites. Ground Water Monitoring & Remediation. Vol. 1 5, No.
3, pp. 157 - 165.
Zheng, C. 1994. MT3D, Modular Three-Dimensional Transport Model. Version 1.86. S.S,
Papadopolous & Associates. Bethesda, Maryland.
Zheng, C. and G.D. Bennett. 1995. Applied Contaminant Transport Modeling. Van Nostrad
Reinhold. New York, New York.
Virginia.
11-2 EarthFax Engineering, Inc
TABLES
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLES
EarthFax Engineering, Inc.
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Groundwater Model Report
December 1996
TABLE 2-1
COMPARISON OF OBSERVED WATER LEVELS WITH
CONTOURED WATER LEVELS
Well Initial Water
ID Level - observed
(feet)
Initial Water
Level - contoured
by PMDIS (feet)
Difference
(observed -
contoured)
(feet)
UNCONFINED AQUIFER
CH-1 4219.17 4,219.13 0.04
CH-2 4219.02 4,218.89 0.13
EF-1 4218.01 4,218.06 -0.05
EF-2 4213.89 4,213.98 -0.09
EF-3 4211.42 4,211.80 -0.38
EF-5 4219.43 4,219.47 -0.04
EF-6 4213.77 4,213.69 0.08
EF-7A 4213.86 4,213.60 0.26
EF-8 4224.01 4,223.85 0.16
EF-9 4213.14 4,213.07 0.07
EF-10 4208.53 4,208.54 -0.01
EF-11 4206.68 4,206.69 -0.01
EF-12 4205.14 4,205.18 -0.04
EF-130S 4205.09 4,205.06 0.03
EF-1 5 4205.65 4,205.68 -0.03
EF-18 4212.53 4,212.58 -0.05
EF-19 4212.35 4,212.41 -0.06
RWMA-1 4217.34 4,217.01 0.33
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TABLE 2-1 (CONTINUED)
COMPARISON OF OBSERVED WATER LEVELS WITH
CONTOURED WATER LEVELS
Well
ID
Initial Water
Level - observed
(feet)
Initial Water
Level - contoured
by PMDIS (feet)
Difference
(observed -
contoured)
(feet)
RWMA-3 4211.97 4,212.00 -0.03
RWMA-4 4213.11 4,213.03 0.08
RWMA-5 4211.05 4,211.15 -0.10
RWMA-6 4213.35 4,213.25 0.10
S-1 4209.95 4,209.93 0.02
S-2 4209.34 4,209.23 0.11
S-3 4212.72 4,212.86 -0.14
S-4A 4217.24 4,217.32 -0.08
S-5 4215.53 4,215.65 -0.12
S-6 4211.53 4,211.53 -0.004
S-7 4212.78 4,212.69 0.09
S-8 4213.10 4,213.04 0.06
S-9 4212.04 4,212.11 -0.07
S-10 4209.71 4,209.74 -0.03
S-11
S-12
S-13
S-14
S-15
4209.95
4210.72
4211.69
4214.24
4214.68
4,209.99
4,210.68
4,211.71
4,214.20
4,214.57
-0.04
0.04
-0.02
0.04
0.11
EarthFax Engineering, Inc.
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TABLE 2-1 (CONTINUED)
COMPARISON OF OBSERVED WATER LEVELS WITH
CONTOURED WATER LEVELS
Well
ID
Initial Water
Level - observed
(feet)
Initial Water
Level - contoured
by PMDIS (feet)
Difference
(observed -
contoured)
(feet)
S-16 4217.43 4,217.29 0.14
S-17 4219.68 4,219.71 -0.03
S-18 4212.25 4,212.30 -0.05
S-19 4212.80 4,212.76 0.04
S-20 4214.07 4,214.04 0.03
S-21 4211.33 4,211.33 0.001
S-22 4210.22 4,210.25 -0.03
S-23 4210.22 4,210.29 -0.07
S-230S 4210.23 4,210.23 -0.001
S-24 4210.33 4,210.34 -0.01
S-25 4209.54 4,209.59 -0.05
S-26 4209.54 4,209.36 0.18
S-27 4207.78 4,207.94 -0.16
S-28 4208.81 4,208.79 0.02
S-29 4206.55 4,206.66 -0.11
S-30 4208.09 4,208.10 -0.01
S-31 4206.04 4,206.14 -0.10
S-34
S-35
S-37
4205.35
4226.64
4212.02
4,205.33
4,226.62
4,212.12
0.02
0.02
-0.10
EarthFax Engineering, Inc.
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TABLE 2-2
SUMMARY OF REPRESENTATIVE HYDRAULIC CONDUCTIVITIES
Well No.
Hydraulic
Conductivity
(ft/min)
Hydraulic
Conductivity
(ft/day)
UNCONFINED AQUIFER
EF-1 0.0030 4.3
EF-2 0.0033 4.8
EF-3 0.0042 6.0
EF-4 0.00062 0.89
EF-5 0.0040 5.8
EF-5-OSA 0.0094 13.5
EF-5-OSB 0.0099 14.3
EF-5-OSC 0.0084 12.1
EF-6 0.0016 2.3
EF-7 0.0081 11.7
EF-8 0.0032 4.6
EF-9 0.0022 3.2
EF-10 0.0014 2.0
EF-11 0.0010 1.4
EF-12 0.000018 0.03
EF-13 0.0002 0.29
EF-13-OS 0.00005 0.07
EF-14 0.00025 0.36
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TABLE 2-2 (Continued)
SUMMARY OF REPRESENTATIVE HYDRAULIC CONDUCTIVITIES
Well No.
Hydraulic
Conductivity
(ft/min)
Hydraulic
Conductivity
(ft/day)
EF-15 0.007 10.1
HFW-1 0.005 7.2
HFW-2 0.001 1.4
HFW-3 0.00066 0.95
S-1 0.0013 1.9
S-2L
S-2U
S-4A
S-5
S-7
S-8
S-9
S-10
S-11
S-13
S-15
S-16
S-18
S-19
0.00014
0.0007
0.0013
0.0002
0.0035
0.0048
0.0020
0.0070
0.0099
0.0020
0.0018
0.0075
0.0013
0.0011
0.20
1.0
1.9
0.29
5.0
6.9
2.9
10.1
14.3
2.9
2.6
10.8
1.9
1.6
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TABLE 2-2 (Continued)
SUMMARY OF REPRESENTATIVE HYDRAULIC CONDUCTIVITIES
Well No.
Hydraulic
Conductivity
(ft/min)
Hydraulic
Conductivity
(ft/day)
S-20 0.010 14.4
S-23 0.0030 4.3
S-23-OS 0.0030 4.3
S-27 0.0016 2.3
S-28L 0.0030 4.3
S-30 0.0011 1.58
S-31 0.00022 0.32
S-32 0.00028 0.40
S-34 0.00035 0.50
S-35 0.0033 4.8
S-36 0.0018 2.6
EB-1 0.006 8.6
EB-4 0.0027 3.9
EB-6 0.0014 2.0
EB-8 0.0014 2.0
EB-10 0.004 5.8
EB-11 0.012 17.3
TEL-2 0.0014 2.02
TEL-3 0.003 4.32
WFP-1 0.00052 0.75
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TABLE 2-2 (Continued)
SUMMARY OF REPRESENTATIVE HYDRAULIC CONDUCTIVITIES
Well No.
Hydraulic
Conductivity
(ft/min)
Hydraulic
Conductivity
(ft/day)
WFP-2 0.00175 2.52
WFP-3 0.000885 1.27
WFP-4 0.00065 0.94
WFP-5 0.0014 2.02
WFP-6 0.00089 1.28
WFP-7 0.00028 0.40
WFP-8 0.000285 0.41
WFP-9A 0.0025 3.60
RWMA-1 0.0007 1.01
RWMA-2A 0.003 4.32
RWMA-3 0.0022 3.17
RWMA-4 0.0012 1.73
RWMA-5 0.00222 3.20
RWMA-6 0.0012 1.73
CONFINED AQUIFER
D-1 A 0.0002 0.29
D-1-OD 0.00002 0.03
D-2 0.00075 1.1
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TABLE 2-2 (Continued)
SUMMARY OF REPRESENTATIVE HYDRAULIC CONDUCTIVITIES
Well No.
Hydraulic
Conductivity
(ft/min)
Hydraulic
Conductivity
(ft/day)
D-5A 0.010 14.4
D-5-ODA 0.0094 13.5
D-5-ODB 0.0084 12.1
D-5-ODC
D-10
D-11
D-34
D-34-OD
D-35
EF-2D
EF-16D
0.0094
0.0008
0.0010
0.012
0.013
0.0025
0.0025
0.0016
13.5
1.2
1.4
17.3
18.7
3.6
3.6
2.3
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TABLE 4-1
DIFFERENCES IN INITIAL AND PREDICTED WATER LEVELS
Well
ID
Initial
Water Level (ft)
Predicted
Water Level (ft)
Difference
(ft)
UNCONFINED AQUIFER
CH-1 4219.17 4,218.22 0.95
CH-2 4219.02 4,218.17 0.85
EF-1 4218.01 4,217.55 0.46
EF-2 4213.89 4,214.61 -0.72
EF-3 4211.42 4,212.84 •1.42
EF-5 4219.43 4,218.80 0.63
EF-6 4213.77 4,213.40 0.37
EF-7A 4213.86 4,212.51 1.35
EF-8 4224.01 4,221.26 2.75
EF-9 4213.14 4,212.60 0.54
EF-10 4208.53 4,209.72 •1.19
EF-11 4206.68 4,207.56 -0.88
EF-1 2 4205.14 4,205.89 -0.75
EF-130S 4205.09 4,204.72 0.37
EF-1 5 4205.65 4,206.76 •1.11
EF-18 4212.53 4,212.24 0.29
EF-19 4212.35 4,212.37 -0.022
EF-50SA 4219.30 4,218.74 0.56
EF-50SB 4219.36 4,218.84 0.52
EF-50SC 4219.43 4,218.84 0.59
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TABLE 4-1 (Continued)
DIFFERENCES IN INITIAL AND PREDICTED WATER LEVELS
Well
ID
Initial
Water Level (ft)
Predicted
Water Level (ft)
Difference
(ft)
RWMA-1 4217.34 4,216.98 0.36
RWMA-3 4211.97 4,211.87 0.10
RWMA-4 4213.11 4,212.62 0.49
RWMA-5 4211.05 4,212.39 -1.34
RWMA-6 4213.35 4,211.33 2.02
S-1 4209.95 4,209.18 0.77
S-2 4209.34 4,208.84 0.50
S-3 4212.72 4,214.98 -2.26
S-4A 4217.24 4,218.46 -1.22
S-5 4215.53 4,215.66 -0.13
S-6 4211.53 4,213.67 -2.14
S-7 4212.78 4,213.51 -0.73
S-8 4213.10 4,212.96 0.14
S-9 4212.04 4,212.61 -0.57
S-10 4209.71 4,209.44 0.27
S-11 4209.95 4,209.75 0.20
S-12 4210.72 4,210.61 0.11
S-13 4211.69 4,211.95 -0.26
S-14 4214.24 4,213.13 1.11
S-15
S-16
4214.68
4217.43
4,214.87
4,215.51
-0.19
1.92
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TABLE 4-1 (Continued)
DIFFERENCES IN INITIAL AND PREDICTED WATER LEVELS
Well
ID
Initial
Water Level (ft)
Predicted
Water Level (ft)
Difference
(ft)
S-17 4219.68 4,218.27 1.41
S-18 4212.25 4,213.06 -0.81
S-19 4212.80 4,212.79 .012
S-20 4214.07 4,213.24 0.83
S-21 4211.33 4,211.98 -0.65
S-22 4210.22 4,210.66 -0.44
S-23 4210.22 4,210.99 -0.77
S-230S 4210.23 4,210.99 -0.76
S-24 4210.33 4,210.29 0.037
S-25 4209.54 4,208.97 0.57
S-26 4209.54 4,208.52 1.02
S-27 4207.78 4,208.29 -0.51
S-28 4208.81 4,209.04 -0.23
S-29 4206.55 4,206.79 -0.24
S-30 4208.09 4,208.33 -0.24
S-31 4206.04 4,207.66 •1.62
S-34
S-35
S-37
4205.35
4226.64
4212.02
4,205.47
4,225.22
4,214.05
-0.12
1.42
-2.03
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TABLE 4-2
VOLUMETRIC BUDGET FOR FLOW MODEL
RECHARGE
Precipitation - Layer 1 1264.2 ft3/day
Specified Head - Layer 1 6087.2 ft3/day
TOTAL RECHARGE 7351.4 ft3/day
DISCHARGE
Drains - Layer 1 6981.1ft3/day
Specified Head - Layer 1 371.24 ft3/day
TOTAL DISCHARGE 7352.3 ft3/day
MASS BALANCE
Recharge - Discharge = -0.935 ft3/day
Percent Discrepancy = -0.01%
NOTE: The above table reflects the daily volumetric budget for the last time step of a 41
year run. A run over a shorter time period will have a slightly larger error.
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TABLE 7-1
BENZENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
UNCONFINED AQUIFER
S-2 10731.54 9286.79 44
S-12 10630.17 9655.27
S-30 10668.21 9178.09 18.2
S-31 10336.35 9143.97
WP-1 10722.47 9120.37
WP-2 10639.2 9116.75 22.9
WP-3 10608.15 9234.75 65.6
WP-4 10546.44 9121.43 41.9
WP-5 10455.54 9077.62
WP-6 10591.06 9000.75 66.7
WP-7 10749.48 8959.39
WP-8 10700.33 9053.31
WP-9 10838.81 9071.68
WP-11 10925.65 8873.54
WP-12 10963.95 8668.4
WP-13 10793.46 8803.51
WP-14 10755.12 8598.61
WP-15 10627.65 8780.23
WP-17 10422.74 8868.98
WP-19 10091.08 9147.28
WP-20 10294.65 9036.94
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TABLE 7-1 (Continued)
BENZENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
WP-21 10283.35 9288.69
WP-22 10153.95 9472.43
WP-23 10510.65 9301.64
WP-26 10609.99 8281.61
WP-27 10288.44 8039.55
WP-28 10196.23 8390.24
WP-29 9740.72 8376.09
WP-30 9860.99 8791.11
WP-31 9795.99 9250.07
WP-32 9842.17 9491.58
WP-39 10476.67 9900.91
WP-40 11135.16 9746.68
WP-41 10900.3 9869.26
WP-42 10690.32 9953.68
WP-43 10618.02 9796.71
WP-44 10779.51 9781.57
WP-45 10899.67 9678.82
WP-46 10827.75 9385.11 28.4
WP-47 10925.3 9161.75 48.3
WP-48 10421.36 9495.01
WP-49 10779 9626.02 15.2
WP-50 10613.87 9360.66 24.4
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TABLE 7-1 (Continued)
BENZENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
WP-51 11028.07 9254.90 210
WP-52 10371.21 9682.54
WP-54 10147.14 9681.74
WP-55 10307.07 10066.17
WP-56 11093.47 9078.6 64.8
WP-57 11141.72 9437.6 60.7
WP-58 11326.85 9544.1
WP-59 11298.46 9323.09
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TABLE 7-2
TOLUENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
UNCONFINED AQUIFER
S-2 10731.54 9286.79 22
S-12 10630.17 9655.27
S-30 10668.21 9178.09 5.6
S-31 10336.35 9143.97
WP-1 10722.47 9120.37
WP-2 10639.2 9116.75 10.1
WP-3 10608.15 9234.75 15.9
WP-4 10546.44 9121.43 7.8
WP-5 10455.54 9077.62 5.3
WP-6 10591.06 9000.75 30.4
WP-7 10749.48 8959.39
WP-8 10700.33 9053.31
WP-9 10838.81 9071.68
WP-11 10925.65 8873.54
WP-12 10963.95 8668.4
WP-13 10793.46 8803.51 23.9
WP-14 10755.12 8598.61
WP-15 10627.65 8780.23
WP-17 10422.74 8868.98
WP-19 10091.08 9147.28
WP-20 10294.65 9036.94
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TABLE 7-2 (Continued)
TOLUENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
WP-21 10283.35 9288.69
WP-22 10153.95 9472.43
WP-23 10510.65 9301.64
WP-26 10609.99 8281.61
WP-27 10288.44 8039.55
WP-28 10196.23 8390.24
WP-29 9740.72 8376.09
WP-30 9860.99 8791.11
WP-31 9795.99 9250.07
WP-32 9842.17 9491.58
WP-39 10476.67 9900.91 7.8
WP-40 11135.16 9746.68
WP-41 10900.3 9869.26
WP-42 10690.32 9953.68
WP-43 10618.02 9796.71
WP-44 10779.51 9781.57
WP-45 10899.67 9678.82 8.6
WP-46 10827.75 9385.11 105
WP-47 10925.3 9161.75 59.7
WP-48 10421.36 9495.01
WP-49 10779.00 9626.02 32.9
WP-50 10613.87 9360.66 11.1
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TABLE 7-2 (Continued)
TOLUENE CONCENTRATION DATA
Well
ID
Northing (ft) Easting (ft) Concentration
(ug/l)
WP-51 11028.07 9254.90 1020
WP-52 10371.21 9682.54 6.2
WP-54 10147.14 9681.74
WP-55 10307.07 10066.17
WP-56 11093.47 9078.6 17.8
WP-57 11141.72 9437.6 57.4
WP-58 11326.85 9544.1
WP-59 11298.46 9323.09
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-1
RESULTS OF GROUNDWATER FLOW MODEL SENSITIVITY ANALYSES
Parameter
Multiplier
MAE
(ft)
RMS
(ft)
Water
Balance
(%)
Maximum
Variation
(ft)
HYDRAULIC CONDUCTIVITY
0.5 0.606 0.785 -0.05 2.374
0.8 0.193 0.244 -0.07 0.724
0.9 0.090 0.114 -0.06 0.337
1.0 la) -0.06
1.1 0.081 0.102 -0.06 0.297
1.2 0.152 0.191 0.00 0.562
1.5 0.336 0.416 -0.01 1.202
RECHARGE
0.5 0.145 0.255 -0.05 1.688
0.8 0.053 0.099 -0.06 0.588
0.9 0.027 0.049 -0.06 0.291
1.0 la) -0.06
1.1 0.026 0.049 -0.06 0.287
1.2 0.052 0.096 -0.06 0.568
1.5 0.129 0.237 -0.07 1.385
la> Water balance discrepancy for the calibrated flow model provided for reference
EarthFax Engineering. Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-1 (Continued)
RESULTS OF GROUNDWATER FLOW MODEL SENSITIVITY ANALYSES
Parameter
Multiplier
0.5
0.8
0.9
1.0 (a)
1.1
1.2
1.5
0.5
0.8
0.9
1.0 la)
1.1
1.2
1.5
MAE
(ft)
RMS
(ft)
Water
Balance
(%)
LEAKANCE
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
0.000
-0.06
-0.06
-0.06
-0.06
-0.06
0.06-
-0.06
DRAIN CONDUCTANCE
0.677
0.224
0.108
0.098
0.189
0.422
0.821
0.275
0.132
0.121
0.232
0.522
-0.03
0.00
-0.06
-0.06
-0.06
-0.07
-0.06
Maximum
Variation
(ft)
0.000
0.000
0.000
0.000
0.000
0.000
0.000
2.058
0.736
0.353
0.330
0.639
1.463
,al Water balance discrepancy for the calibrated flow model provided for reference
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-1 (Continued)
RESULTS OF GROUNDWATER FLOW MODEL SENSITIVITY ANALYSES
Parameter
Multiplier
-10 ft
-5 ft
-2 ft
0 ft la)
2 ft
5 ft
10 ft
0.5
0.8
0.9
1.0 la)
1.1
1.2
1.5
MAE
(ft)
RMS
(ft)
Water
Balance
(%)
SHALLOW AQUIFER BOTTOM ELEVATION
0.442
0.250
0.107
0.126
0.357
lb)
0.549
0.314
0.137
0.163
0.470
lb)
-0.06
-0.03
0.01
-0.06
-0.05
0.05
-0.02
ANISOTROPY
0.308
0.094
0.043
0.037
0.066
0.142
0.462
0.143
0.066
0.057
0.106
0.227
0.00
-0.12
-0.08
-0.06
-0.05
-0.14
0.02
Maximum
Variation
(ft)
1.567
0.941
0.437
0.538
1.717
lb)
1.912
0.617
0.290
0.260
0.495
1.087
|a| Water balance discrepancy for the calibrated flow model provided for reference
|bl Error has become extremely large
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-2
RESULTS OF CONTAMINANT TRANSPORT MODEL SENSITIVITY ANALYSIS
Parameter
Multiplier
MAE
(ft)
RMS
(ft)
Maximum
Variation
(ug/l)
EFFECTIVE POROSITY
0.5 0.371 5.220 171.772
0.8 0.133 1.906 61.936
0.9 0.065 0.926 29.934
1.1 0.061 0.875 27.997
1.2 0.118 1.704 54.182
1.5 0.270 3.940 122.996
0.5
0.8
0.9
1.1
1.2
1.5
MOLECULAR DIFFUSION
0.000
0.000
0.000
0.000
0.000
0.000
0.001
0.000
0.000
0.000
0.000
0.001
0.021
0.008
0.004
0.004
0.008
0.021
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-2 (Continued)
RESULTS OF CONTAMINANT TRANSPORT MODEL SENSITIVITY ANALYSIS
Parameter
Multiplier
MAE
(ft)
RMS
(ft)
Maximum
Variation
(ug/l)
LONGITUDINAL DISPERSIVITY
0.5 0.103 1.151 44.078
0.8 0.039 0.430 16.332
0.9 0.019 0.210 7.979
1.1 0.019 0.203 7.642
1.2 0.037 0.398 14.978
1.5 0.090 0.949 35.393
HORIZONTAL TRANSVERSE DISPERSIVITY
0.5
0.8
0.9
1.1
1.2
1.5
0.062
0.024
0.012
0.012
0.023
0.056
0.692
0.268
0.133
0.130
0.257
0.626
18.745
7.218
3.565
3.479
6.877
16.606
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-2 (Continued)
RESULTS OF CONTAMINANT TRANSPORT MODEL SENSITIVITY ANALYSIS
Parameter
Multiplier
0.5
0.8
0.9
1.1
1.2
1.5
0.5
0.8
0.9
1.1
1.2
1.5
MAE
(ft)
RMS
(ft)
Maximum
Variation
(ug/l)
SOURCE CONCENTRATION
1.556
0.622
0.311
0.311
0.622
1.556
19.499
7.800
3.900
3.900
7.800
19.499
600.000
240.00
120.00
120.00
240.000
600.000
ACTIVITY COEFFICIENT
(FRACTION ORGANIC CONTENT)
0.248
0.098
0.049
0.048
0.094
0.227
3.129
1.330
0.672
0.678
1.355
3.358
112.853
50.035
25.447
25.805
51.545
126.092
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-2 (Continued)
RESULTS OF CONTAMINANT TRANSPORT MODEL SENSITIVITY ANALYSIS
Parameter
Multiplier
MAE
(ft)
RMS
(ft)
Maximum
Variation
(ug/l)
REACTION RATE (DECAY RATE)
0.5 0.200 3.000 84.677
0.8 0.076 1.146 32.320
0.9 0.038 0.565 15.913
1.1 0.037 0.548 15.437
1.2 0.072 1.081 30.414
1.5 0.173 2.588 72.739
0.5
0.8
0.9
1.1
1.2
1.5
BULK DENSITY
0.249
0.098
0.049
0.048
0.094
0.226
3.138
1.335
0.674
0.680
1.360
3.346
113.158
50.206
25.536
25.898
51.727
125.677
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
TABLE 8-2 (Continued)
RESULTS OF CONTAMINANT TRANSPORT MODEL SENSITIVITY ANALYSIS
Parameter
Multiplier
MAE
(ft)
RMS
(ft)
Maximum
Variation
(ug/l)
HORIZONTAL HYDRAULIC CONDUCTIVITY
0.5 0.465 6.650 187.137
0.8 0.177 2.424 70.061
0.9 0.088 1.184 34.753
1.1 0.102 1.326 39.036
1.2 0.206 2.604 76.623
1.5 0.507 6.061 175.930
0.5
0.8
0.9
1.1
1.2
1.5
DRAIN CONDUCTANCE
0.340
0.108
0.051
0.051
0.096
0.197
4.882
1.536
0.730
0.834
1.569
3.252
185.218
53.679
26.052
31.816
60.703
131.649
EarthFax Engineering, Inc.
FIGURES
Chevron Products Company
Salt Lake Refinery
Groundwater Model Report
December 1996
FIGURES
EarthFax Engineering, Inc.
*
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Chevron
Salt Lake Refinery
FIGURE 1-1 CHEVRON REFINERY
VICINITY MAP
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
BASE MAP: USGS 30x60 MIN. QUADRANGLE
"SALT LAKE - 1980 AND TOOELE - 1979"
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Chevron
Salt Lake Refinery
Products Company
FIGURE 1-2 CHEVRON REFINERY BASE MAP
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DATE AUG 1996
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EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FW2-1.DWG UCS12-10 AUG. 1M6
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Salt Lake Refinery
Products Company
FIGURE 2-1 INITIAL POTENTIOMETRIC
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DATE AUG 1996
0' 800' EarthFax Engineering, Inc.
Engineers/Scientists
FIG2-2.DWG UC512-10 AUC 1996
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Salt Lake Refinery
FIGURE 2-2 MONITOR WELL LOCATION MAP
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0' 500' EarthFax Engineering, Inc.
Engineers/Scientists
RG2-3.DWG UC512-10 AUG. 1MB
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Salt Lake Refinery
Products Company
FIGURE 2-3 MEASURED HYDRAULIC
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DATE ________
0' 800'
__
EarthFax Engineering, Inc.
Engineers/Scientists
FIG3-1.DWG UC512-10 9-13-96
COLUMN NUMBER
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LEGEND
CONTAMINENT TRANSPORT
MODEL CALIBRATION AREA
Chevron Chevron Products Company
Salt Lake Refinery
FIGURE 3-1 GRID
TiR LDJ rH GWW
DR APP GWW
ENGR yy
DATE AUG 1996
0' 800'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG3-2A.DWG UC512-10 AUG 1996
15
COLUMN NUMBER
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800
LEGEND
DRAIN CELLS
CONSTANT HEAD CELLS
NO FLOW BOUNDARY
(INACTIVE CELLS)
Chevron r\ •
Chevron
Salt Lake Refinery
FIGURE 3-2 BOUNDARY CONDITIONS
AND DRAIN NODE LOCATIONS
tM • -1 •
EEarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG3-3A.DWG UC512-10 AUG. 1996
10
COLUMN NUMBER
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2.0 FT/DAY
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| | 4.5 FT/DAY
7.5 FT/DAY
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17 FT/DAY
INACTIVE CELLS
Chevron r\ \
Chevron
Salt Lake Refinery
FIGURE 3-3 HYDRAULIC CONDUCTIVITY ZONES
HP LDJ rH GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 800
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG3-4A DWG UC512-10 9-13-96
COLUMN NUMBER
20 25 30 35 40 45 50 55 60 65 70 75 15 0 80 99 85 95 90
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1 x 10 5 DAY 1
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INACTIVE CELLS
Cta/ran Chevron
Salt Lake Refir
FIGURE 3-4 LEAKANCE ZONES BETWEEN THE
SHALLOW AND DEEP AQUIFERS
PR LDJ PH. GWW
DR APP GWW
ENGR LDJ
DATE AUG 1996
0' 800' • • EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG3-5.DWG UC512-10 AUG 1996
10
60
95
100
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COLUMN NUMBER
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1.0 x 10 5 FT/DAY
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| | NO RECHARGE
INACTIVE CELLS
Chevron
Salt Lake Refinery
FIGURE 3-5 RECHARGE ZONES
HP LDJ rn GWW
DR APP GWW
ENGR LIU
DATE AUG 1996
0' 800
EarthRix
EarthFax Engineering, Inc.
Engineers/Scientists
FKM-1.DW6 UC312-10 AUG. 1806
COLUMN NUMBER
20 25 30 35 40 45 50 55 60 65 70 75 99 95 15 BO 85 90 0
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15
20
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^ Salt Lake Refinery
Products Company
FIGURE 4-1 RE-CALIBRATED STEADY-STATE
POTENTIOMETRIC SURFACE
LDJ PM GWW
DR APP GWW
ENGR LDJ
DATE AUG 1996
0* 800
Yi
EarthFax Engineering, Inc.
Engineers/Scientists
FIG4-2.DWG UC512-10 9-13-96
10
COLUMN NUMBER
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 99
10
15
20
25
30
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40
45
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55
ZD
60
on n o cm 65
70 15555
m 75 •
80
7 85
90
95
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105
Chevron Products
Salt Lake Refinery
FIGURE 4-2 DIFFERENCE IN INITIAL AND
PREDICTED WATER ELEVATIONS
HR LDJ rn. GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 800
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG5-1 DWG UC512-10 9-13-96
A
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Chevron Chevron Products Company
Salt Lake Refinery
FIGURE 5-1 MEASURED BENZENE
CONCENTRATIONS, FALL 1994
DR LDJ rH. GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
WA
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EarthFax
EarthFax Engineering,
Engineers/Scientists
Inc.
FIG5-2.DWG UC512-10 9-13-96
A
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Chevron Products
Salt Lake Refinery
FIGURE 5-2 MEASURED TOLUENE
CONCENTRATIONS, FALL 1994
TIP LDJ r M GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG5-3.DWG UC512-10 9-13-96
4220
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4200
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CLAYEY SILT
SILTY SAND SILTY SAND CLAYEY SILT
SILTY SAND OIL
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SILTY CLAY
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DR APP Gww
ENGR LJJJ
DATE AUG 1996
HORZ. SCALE: 1" = 60'
VERT. SCALE: 1" = 8'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
Chevron Products
Salt Lake Refinery
FIGURE 5-3. CROSS SECTION
FIG5-4.DWG UC512-10 9-13-96
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Chevron r\ i n
Chevron Products
Salt Lake Refinery
FIGURE 5-4 CROSS SECTION LOCATION MAP
nB LDJ rH. GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
F1C6-1.MC UCS12-10 AUG. 1096
J
CONSTANT CONCENTRATION
CELLS
§3 Chevron
Salt Lake Refinery
Products Company
FIGURE 6-1 BENZENE CONSTANT
CONCENTRATION CELLS (SOURCE CELLS)
TIP SWF ru LDJ
DR APP• GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
n08-2.OWS UCS12-10 AUG. 1tM
CONSTANT CONCENTRATION
CELLS
3
S3 Chevron
Salt Lake Refinery
Products Company
FIGURE 6-2 TOLUENE CONSTANT
CONCENTRATION CELLS (SOURCE CELLS)
np LDJ rn GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0* 400*
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG7-1.DWG UC512-IQ AUG 1996
\ r
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Chtvron Chevron Products
Salt Lake Refinery
FIGURE 7-1 CALIBRATED BENZENE PLUME
FIR LDJ rH. GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG7-2DWG UC512-10 AUG 1996
A
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Chevron
Salt Lake Refinery
Products Company
FIGURE 7-2 CALIBRATED TOLUENE PLUME
HR LDJ rH. GWW
DR APP. GWW
ENGR LPJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering,
Engineers/Scientists
Inc.
FIO0-1.DW0 UC512-10 AUG. 1006
10 15
COLUMN NUMBER
20 25 30 35 40 45 50 55 60 65 70 75 80 99 85 95 90
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Salt Lake Refinery
Products Company
FIGURE 9-1 OILY DUMP SIMULATION
POTENTIOMETRIC SURFACE
np LDJ rn GWW
DR APP• GWW
ENGR LPJ
DATE AUG 1996
0' 800'
VA
ftW
EarthFax Engineering, Inc.
Engineers/Scientists
FIG9-2 DWG UC512-10 9-13-96
A
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Chevron r\ i
Chevron
Salt Lake Refinery
Products Company
FIGURE 9-2 SIMULATED BENZENE PLUME,
UNCHANGED SOURCE CONCENTRATIONS
(EQUILIBRIUM)
T1R LDJ rH GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
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EarthFax
EarthFax Engineering,
Engineers/Scientists
Inc.
FIC9-3.DWG UC512-10 9-13-96
A
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WP-41 45
< WP^-44
" T-—WE-42-^
WP Ci o o 12 WP-26
o WP-43
Q WP. O WP-39 WP-48 WP-17 "0 23 WP
S-31 Q O 27 WRrr21 WP-53 WP-20Q o WP-55 WP 28
o WP-54
lQt= WP-19 O
O wp-22
r~i
74) WP-30 WP-32
WP^31 Q o
S3 Chevron
Salt Lake Refinery
Products Company
FIGURE 9-3 SIMULATED BENZENE PLUME,
LOWER SOURCE CONCENTRATIONS
(EQUILIBRIUM)
m LDJ PH GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
WA
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG9-4 DWG UC512-10 9-13-96
A
«g» V8
WP 57
o
WP-40 WP-51 WP-12 UN
O WP- \\
WP-
WP-41
o—
WP-45
WP^46
WP^-44 WP-,7 2 WP-49CL_T) o
Q S--12 WP-26
WP-43
WP o WP
WP-1 WP-50 WE
p^;59 Q
WP^-17 "O WP-23
S—31
WP-200 ° wb21
48
VP-^3
€> WP 27
WP-55 WP-28
o WP-54
©=: WP-19 O
Q WP-22
WP-30
O
WP-32
WP-31 O
Q
Chevron
Salt Lake Refinery
Products Company
FIGURE 9-4 SIMULATED BENZENE PLUME,
WITH SOURCE REMOVED (30 YEARS)
TiR LDJ r.H. GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400' • • EarthFax
EarthFax Engineering,
Engineers/Scientists
Inc.
FIG9-5.DWG UC512-10 9-13-96
A
N
OWP-40
WP
P-41
WP
WR -44
O \A/D_ WP-42
o WP-
o WP-43
\\WP-48 o WP-39 WP
-17 S-31 V\\
WP-200 ° wb21
WP
WP-53
WP-55 WP-28
o
WP 27
wpp19 WP-^ WP-54
3 WP-30
O
WP-32
WP^31 0
S3 Chevron Produc
Salt Lake Refinery
FIGURE 9-5 SIMULATED TOLUENE PLUME,
UNCHANGED SOURCE CONCENTRATIONS
(EQUALIBRIUM)
nt? LDJ rH GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIC9-6.DWG UC512-10 9-13-96
>5
OWP-40
WP WP-11 WP-41
O— o WP
WR 44 WP
o W^-42
WP WP-26 -43 05 o
o WP-4c WP-39 WP 23
WP-17
31 WP-53 ©
WP-20Q 0 W^21 O
WP-55 WP-28
o
WP 27
W^-54
WPJT-19 O Q WP-22
5 WP-30
O
WP-32
WP^31 Q
Chevron Products
Salt Lake Refinery
FIGURE 9-6 SIMULATED TOLUENE PLUME,
LOWER SOURCE CONCENTRATIONS
(EQUALIBRIUM)
DR LDJ rH GWW
DR APP GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering,
Engineers/Scientists
Inc.
F1G9-7.DWG UC912-10 AUG. 1998
WP-58
O WP-59
WP 57
WP 56 OWP-40
6 WP
WP 47 WP-45 WP-41
O •© O
WP 46
Tj o WP 9 WP^-44
T WP-4;
WP. C o o o WP 3-12 20 WP WP
WP
WP-50 WP WP-26 we WP 43 o O WR o WP-39 o 48 WP
31 WP-53 WP
o WR o 20O WP o WP-55 WP-28
O WP 27
P-54 2 WP-19 O
Q WP-22
r
WP-30 WP-32
WP^31 Q
S3 Chevron
Salt Lake Refinery
Products Company
FIGURE 9-7 SIMULATED TOLUENE PLUME,
WITH SOURCE REMOVED (200 YEARS)
nR LDJ ru GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 400'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
F1W-&DWG UC512-10 AUC IMS
COLUMN NUMBER
20 25 30 35 40 45 50 55 60 65 70 75 99 15 90 95 0 80 85
/
10
P 5
20
25
30
• 35
40
45 s T3
cn 50
LJ OS)
55
60
O
at 65 Ml
•g 70
75
C=3
80
3 85
3 90
95
100 O <0
LDJ GWW DR CH
GWW DR APP.
LDJ ENGR
nATF AUG 1996 105
0" 800
§3 Chevron Products Company
^ Salt Lake Refinery
FIGURE 9-8 NORTH TANK FARM
SIMULATION POTENTIOMETRIC SURFACE
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG9-9 DWG UC512-10 AUG 1996
10
COLUMN NUMBER
15 20 25 30 35 40 45 50 55 60 65 70 75 80 99 85 90 95
, , I
I t r
L_ T S—
i_ L. 1- t-
a../—. J./... 10
i-r< r- ,--r—> —— - -- H— t-
15
'ZSZ
h , t--r-4
20
—j at
25 7XSXZ
J~4
30 £2 j—
4 -: j;
-t-> 35
\->--t Tf
40
r r 'SQ
45
tr-
_L jar-i
50
hS: LU
—•* ..+ -1-
55
3
.9
60 t-i-i -t— —i fl O —i
OZ 65
-t-t-i fe -H r-70 -1 !-...
zrxr 75 Llir. ( v err
X~ X -+•— 80
JX ^—, 85 •rr-xx.
90
J - 1 r
T'H'T"H"~r-lT~
r-H-+-i——i
95 M ~(~r --t-
4-4-441 44444+4
L rhh-jfirttift -4--r—
JXi. LUJj. [!>!'' ..U-^-U-UJ
100
^rlthr^t+t^r^-HT
1 i i • : • i i • : ; : i • i i ; 1 ! ; ; ! \ i ' \ \ 1 • | i ' , ' ; '
i:: • •: i • i; i i \ \ Ji i1: i 11!; | i 11; \•; [ i;;
-A
. - 4-1 -i rrr
44 ' : 1 i ! I • I i I |
! 4 I: i: ]11 i i • i 1 i1; 1111; j! I!; h
rfH-Hi: "ii; ifl!! jiil M'{!
•;.; i i:;; i i ' i i! i! 11: i! i : , iTTT"
105 I I ! i:
Chevron
Salt Lake Refinery
Products Company
FIGURE 9-9 NORTH TANK FARM SIMULATION
CONSTANT CONCENTRATION CELLS
m LDJ ru GWW
DR APP GWW
ENGR LDJ
DATE AUG 1996
0' 800
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG9-10DWC UC512-10 AUG 1996
10
COLUMN NUMBER
15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 99
15
20
U
25
30
35
40
45
LX. 50
LU
CD
55
60
3 ul 65
70
75 L_J
80
•L
3
85
90
95
100
05
Chevron Products
Salt Lake Refinery
FIGURE 9-10 NORTH TANK FARM AND PONDS
2 AND 3 BENZENE PLUMES AFTER 30 YEARS
TIP LDJ PM GWW
DR APP. GWW
ENGR yy
DATE AUG 1996
0' 800'
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
FIG9-11 DWG UC512-10 AUG. 1992
15
COLUMN NUMBER
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 99
10
15
20
25
30
35
40
vr. 45
cr 50 Lu
CD
55
3
60
O
cr 65
70
u t5 75
80
U 7 85
90
95
00
05
Chevron Products
Salt Lake Refinery
FIGURE 9-11 NORTH TANK FARM AND PONDS
2 AND 3 BENZENE PLUME AFTER 100 YEARS
np LDJ rH GWW
DR APP. GWW
ENGR LDJ
DATE AUG 1996
0' 800
EarthFax
EarthFax Engineering, Inc.
Engineers/Scientists
APPENDIX A
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
APPENDIX A
INITIAL WATER-LEVEL DATA
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix A
Groundwater Model
December 1996
Initial Water Level Data for the Shallow Aquifer
Well or
Point ID
CH-1
CH-2
EF-1
EF-10
EF-11
EF-12
EF-130S
EF-15
EF-18
EF-19
EF-2
EF-3
EF-5
EF-50SA
EF-50SB
EF-50SC
EF-6
EF-7A
EF-8
EF-9
RWMA-1
RWMA-3
RWMA-4
RWMA-5
RWMA-6
S-1
S-10
S-11
S-12
-13
-14
-15
-16
-17
-18
-19
S-
S-
S-
S-
S-
S-
S-
Northing
11043.39
11232.18
10946.60
12024.48
11721.03
10940.55
10169.34
8014.28
10437.63
10014.88
10572.40
10158.50
11170.90
11170.47
11176.27
11166.53
10438.60
10024.72
11217.50
9860.90
9668.25
9239.52
8988.35
9056.62
8656.16
7752.56
9516.30
8573.20
10630.17
10206.61
10160.84
10998.83
10360.87
10648.22
9403.09
9521.54
Easting
12159.61
12025.55
12128.20
9529.93
8878.16
8522.69
7971.64
8879.64
11329.91
11309.64
11890.20
11931.00
12157.30
12148.49
12158.52
12165.09
11702.80
11908.38
12450.40
11644.10
10376.30
9991.17
10139.63
10985.22
10683.02
10238.44
9703.60
9948.90
9655.27
9958.32
10838.12
11562.85
12378.16
12658.63
10893.25
11250.90
Elevation
4219.17
4219.02
4218.01
4208.53
4206.68
4205.14
4205.09
4205.65
4212.53
4212.35
4213.89
4211.42
4219.43
4219.30
4219.36
4219.43
4213.77
4213.86
4224.01
4213.14
4217.34
4211.97
4213.11
4211.05
4213.35
4209.95
4209.71
4209.95
4210.72
4211.69
4214.24
4214.68
4217.43
4219.68
4212.25
4212.80
A-1
Chevron Products Company
Salt Lake Refinery
Appendix A
Groundwater Model
December 1996
Initial Water Level Data for the Shallow Aquifer (Continued)
Well or
Point ID
S-2
S-20
S-21
S-22
S-23
S-230S
S-24
S-25
S-26
S-27
S-28
S-29
S-3
S-30
S-31
S-34
S-35
S-37
S-4A
S-5
S-6
S-7
S-8
S-9
1
2
3
4
5
6
7
8
9
10
11
12
Northing
10731.54
9468.11
8718.91
7904.13
7850.22
7847.93
7826.11
7741.85
7738.00
7726.90
9484.53
9436.38
11148.15
10668.21
10336.35
8078.48
11599.93
11058.22
11781.03
9962.41
12099.80
11774.53
10683.02
10509.87
6300.00
7000.00
7500.00
8000.00
8450.00
8500.00
9000.00
9500.00
10000.00
10500.00
11000.00
11 500.00
Easting.
9286.79
12105.97
11343.76
12096.42
11476.37
11469.11
10901.24
10125.46
9974.25
9825.79
9601.46
9388.90
11480.81
9178.09
9143.97
7996.54
12905.95
11316.46
11872.54
12719.30
10698.98
10739.68
10824.80
10369.77
6350.00
6500.00
6700.00
6700.00
7000.00
7500.00
7600.00
7620.00
7600.00
7250.00
7100.00
6250.00
Elevation
4209.34
4214.07
4211.33
4210.22
4210.22
4210.23
4210.33
4209.54
4209.54
4207.78
4208.81
4206.55
4212.72
4208.09
4206.04
4205.35
4226.64
4212.02
4217.24
4215.53
4211.53
4212.78
4213.10
4212.04
4205.00
4204.90
4204.80
4204.70
4204.60
4204.50
4204.40
4204.30
4204.20
4204.10
4204.00
4203.80
A-2
Chevron Products Company
Salt Lake Refinery
Appendix A
Groundwater Model
December 1996
Initial Water Level Data for the Shallow Aquifer (Continued)
Well or
Point ID
J-13
J-14
J-15
A-1
A-2
A-3
A-4
A-5
A-5A
A-5B
A-6
A-7
A-8
A-9
A-1 OA
A-11
A-11A
A-12
A-13
•14
•15
•16
-17
•18
A-
A-
A-
A-
A-
Northing
12000.00
12500.00
13000.00
13200.00
13200.00
13200.00
13200.00
13200.00
12500.00
13200.00
12000.00
10600.00
9500.00
8500.00
8000.00
7000.00
6000.00
6000.00
6000.00
10500.00
9250.00
11500.00
11250.00
9750.00
Easting
5775.00
5875.00
5625.00
7450.00
7900.00
8750.00
12000.00
13000.00
13000.00
14000.00
13500.00
13500.00
13500.00
12750.00
13700.00
13650.00
13500.00
12250.00
10000.00
8200.00
8100.00
7250.00
7250.00
8050.00
Elevation
4203.70
4203.60
4203.50
4205.50
4206.00
4207.50
4220.00
4226.50
4226.50
4231.00
4228.10
4223.50
4219.70
4214.00
4219.75
4219.70
4219.70
4214.00
4209.00
4205.05
4205.10
4203.98
4203.95
4205.20
NOTE: Data with a prefix of A or J were added to better
represent the actual potentiometric surface
A-3
APPENDIX B
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
APPENDIX B
METHODS OF MONITOR WELL AND PIEZOMETER INSTALLATION
EarthFax Engineering, Inc.
METHODS OF MONITOR WELL AND PIEZOMETER INSTALLATION
IN SUPPORT OF MODELING INVESTIGATIONS
CHEVRON PRODUCTS COMPANY
Salt Lake Refinery
Prepared by
EARTHFAX ENGINEERING, INC.
Midvale, Utah
December 1996
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE OF CONTENTS
Section Page
B.1 - METHODOLOGY B-1
B.2 - REFERENCE CITED B-2
LIST OF TABLES
TABLE B-1 SURVEY COORDINATES AND ELEVATION OF WELLS B-3
TABLE B-2 SURVEY COORDINATES AND ELEVATION OF PIEZOMETERS B-9
LIST OF FIGURES
FIGURE B-1 NEWLY INSTALLED MONITOR WELLS B-11
FIGURE B-2 NEWLY INSTALLED PIEZOMETER LOCATIONS B-12
LIST OF ATTACHMENTS
ATTACHMENT A MONITOR WELL DRILL LOGS AND COMPLETION DETAILS
B-ii EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
APPENDIX B
METHODS OF MONITOR WELL AND PIEZOMETER INSTALLATION
IN SUPPORT OF MODELING INVESTIGATIONS
B.l METHODOLOGY
In support of the 1996 groundwater flow and contaminant transport modeling
investigation of the Chevron Salt Lake Refinery, 6 shallow monitor wells and 33 piezometers
were installed in the area west of the Oil Drain known as the west field. The purpose of this
appendix is to provide information regarding the location of the new monitor wells and
piezometers and to present the drill logs and completion details for the monitor wells.
The new monitor wells have been designated as WFP-10 through 15. Drilling,
sampling, completion, and development methods used by EarthFax to install the new monitor
wells are the same as found in Appendix B of the 1992 flow model report for shallow monitor
wells (EarthFax Engineering, 1992). A map showing the location of the new monitor wells
can be found on Figure B-1. The coordinates of the new monitor wells and all other monitor
wells at the refinery can be found in Table B-1. Finally, monitor drill logs and completion
details for the new wells as well as previously installed wells have been compiled in
Attachment A of this appendix.
The new piezometers have been designated as MG-1 through 35. Piezometers MG-3
and MG-31 were not installed. The piezometers were installed using a direct push rig (i.e.,
Geo-Probe). The holes had a diameter of 2 inches and a depth of 12 to 15 feet. Once the
hole had been pushed, 10 feet of threaded 1-inch diameter 10-slot PVC screen connected to
5 or 10 feet (depending on hole depth) of 1-inch diameter blank PVC casing was inserted into
the hole. The annulus between the borehole wall and the screen was filled with 30 to 40-
B-1 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
mesh silica sand to a depth of approximately 1 foot below the top of the hole. The upper foot
of annular space was filled with granulated bentonite. The piezometer was then labeled,
capped, and surveyed. A map containing the location of the newly installed piezometers can
be found on Figure B-2. Table B-2 contains the survey coordinates and elevations of the new
piezometers.
B.2 REFERENCE CITED
EarthFax Engineering, Inc. 1992. Spring 1992 Steady-State Groundwater Flow Model.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
City, Utah.
B-2 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE DEEP AQUIFER
DEEP WELL LD. NORTHING EASTfNG TOP OF CASING
ELEVATION
D-1A 7745.87 10211.21 4214.62
D-2 10750.21 9268.2 4219.7
D-3 11146.17 11493.19 4221.4
D-4 11779.19 11862.11 4224.4
D-5 9974.26 12718.53 4220.85
D-5A 9961.09 12724.99 4222.07
D-1-OD 7745.97 10237.28 4214.06
D-5-ODA 9966.06 12713.43 4221.81
D-5-ODB 9952.14 12697.85 4222.40
D-5-ODC 9997.24 12702.26 4221.29
D-10 9505.8 9706.4 4216.97
D-11 8565.2 9951 4217.24
D-28 9471.18 9603.78 4215.21
D-33 9451.92 7939.92 4216.38
D-34 8064.97 7995.42 4213.43
D-34-OD 8085.31 7996.02 4213.41
D-35 11620.06 12917.35 4238.54
EF-2D 10560.9 11890.2 4220.07
EF-16D 7921.87 12122.37 4216.10
EF-17D 11116.85 8180.80 4213.35
B-3 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1 (Continued)
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE SHALLOW AQUIFER
SHALLOW WELL
I.D.
NORTHING EASTING TOP OF CASJNG
ELEVATION
CH-1 11043.39 12159.61 4225.57
CH-2 11232.18 12025.55 4225.59
EF-1 10946.6 12128.2 4223.85
EF-2 10572.4 11890.2 4219.73
EF-3 10158.5 11931 4219.36
EF-4 10515.2 12120.3 4220.06
EF-5 11170.9 12157.3 4225.42
EF-5-OSA 11170.47 12148.49 4226.19
EF-5-OSB 11176.27 12158.52 4225.82
EF-5-OSC 11166.53 12165.09 4225.88
EF-6 10438.6 11702.8 4220.16
EF-7A 10024.72 11908.38 4219.42
EF-8 11217.5 12450.4 4228.41
EF-9 9860.9 11644.1 4217.69
EF-10 12024.48 9529.93 4216.57
EF-11 11721.03 8878.16 4213.2
EF-12 10940.55 8522.69 4211.58
EF-13 10168.79 7979.26 4213.79
EF-13-OS 10169.34 7971.64 4211.92
B-4 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1 (Continued)
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE SHALLOW AQUIFER
SHALLOW WELL
I.D.
NORTHfNG EASTING TOP OF CASING
ELEVATION
EF-14 8789.93 7978.84 4214.62
EF-15 8014.28 8879.64 4214.09
EF-18 10437.63 11329.91 4219.15
EF-19 10014.88 11309.64 4220.83
HFW-1 8059.97 10157.14 4215.68
HFW-2 8038.32 10148.02 4211.68
HFW-3 8043.34 10122.93 4211.25
LFM-1 11222.99 11527.58 4222.07
LFM-2 11054.12 11809.21 4225.15
LFM-3 11037.93 11564.36 4221.56
LFM-4 11746.42 12081.67 4226.86
RWMA-1 9668.25 10376.3 4225.9
RWMA-2A 9614.66 9993.64 4226.53
RWMA-3 9239.52 9991.17 4225.66
RWMA-4 8988.35 10139.63 4225.42
RWMA-5 9056.62 10985.22 4218.4
RWMA-6 8656.16 10683.02 4220.93
S-1 7752.56 10238.44 4214.92
S-2 10731.54 9286.79 4220.34
B-5 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1 (Continued)
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE SHALLOW AQUIFER
SHALLOW WELL
I.D.
NORTHING EASTING TOP OF CASING
ELEVATION
S-2L 10754.79 9267.54 4218.69
S-2U 10749.14 9274.05 4218.75
S-3 11148.15 11480.81 4219.7
S-4A 11781.03 11872.54 4225.78
S-5 9962.41 12719.3 4220.3
S-6 12099.8 10698.98 4220.82
S-7 11774.53 10739.68 4220.71
S-8 10683.02 10824.8 4221.54
S-9 10509.87 10369.77 4218.84
S-10 9516.3 9703.6 4217.17
S-11 8573.2 9948.9 4217.54
S-12 10630.17 9655.27 4218.84
S-13 10206.61 9958.32 4215.71
S-14 10160.84 10838.12 4217.14
S-15 10998.83 11562.85 4219.8
S-1 6 10360.87 12378.16 4221.38
S-17 10648.22 12658.63 4222.83
S-18 9403.09 10893.25 4218.79
S-19 9521.54 11250.9 4216.65
B-6 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1 (Continued)
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE SHALLOW AQUIFER
SHALLOW WELL
LD.
NORTHING EASTING TOP OF CASING
ELEVATION
S-20 9468.11 12105.97 4217.93
S-21 8718.91 11343.76 4214.94
S-22 7904.13 12096.42 4215.24
S-23 7850.22 11476.37 4213.83
S-24 7826.11 10901.24 4215.16
S-25 7741.85 10125.46 4214.88
S-26 7738 9974.25 4215.18
S-27 7726.9 9825.79 4215.25
S-28 9484.53 9601.46 4214.93
S-28L 9477.98 9602.27 4214.66
S-28U 9490.86 9599.63 4214.7
S-29 9436.38 9388.9 4215.7
S-30 10668.21 9178.09 4215.68
S-31 10336.35 9143.97 4216.21
S-32 11436.05 8102.64 4215.57
S-33 9454.38 7953.64 4216.08
S-34 8078.48 7996.54 4214.6
S-3 5 11599.93 12905.95 4238.18
S-36 9551.13 8905.87 4215.93
B-7 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-1 (Continued)
SURVEY COORDINATES AND ELEVATION OF WELLS IN THE SHALLOW AQUIFER
SHALLOW WELL
ID.
NORTHING EASTING TOP OF CASING
ELEVATION
S-37 11058.22 11316.46 4219.28
S-23-OS 7847.93 11469.11 4216.95
TEL-1 10127.22 10100.31 4217.73
TEL-2 10144.82 9681.64 4217.16
TEL-3 10271.32 9609.74 4219.27
WFP-1 10817.05 9046.8 4213.8
WFP-2 10484.69 9313.24 4216.7
WFP-3 10091.76 9204.53 4214.94
WFP-4 10650.71 8747.16 4214.06
WFP-5 10543.84 8963.91 4214.34
WFP-6 10303.43 8139.19 4214.38
WFP-7 9820.87 8312.02 4214.52
WFP-8 9535.51 8721.55 4213.52
WFP-9A 11297.31 9692.53 4217.29
WFP-10 10385.46 8714.99 4215.05
WFP-11 9936.59 8882.23 4212.84
WFP-12 9073.90 9329.77 4212.29
WFP-13 8506.76 9476.50 4212.53
WFP-14 8565.54 8358.27 4212.52
WFP-15 9051.65 8402.86 4212.69
B-8 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-2
SURVEY COORDINATES AND ELEVATION OF NEWLY INSTALLED PIEZOMETERS
SHALLOW PIEZ. I.D. NORTHING EASTING TOP OF CASING
ELEVATION
MG-1 9950.22 9220.31 4214.09
MG-2 9950.92 8560.27 4213.22
MG-4 9962.91 7928.22 4214.00
MG-5 9546.34 9219.64 4214.31
MG-6 9554.95 8228.71 4213.31
MG-7 9150.07 9222.27 4214.08
MG-8 9149.12 8890.86 4213.69
MG-9 9149.77 8560.97 4213.66
MG-10 9150.29 8228.25 4214.14
MG-11 9145.83 7902.33 4212.00
MG-12 8784.10 9766.95 4215.14
MG-13 8747.65 9572.56 4214.01
MG-14 8754.96 9221.12 4213.75
MG-1 5 8750.12 8884.39 4213.89
MG-1 6 8751.14 8558.94 4213.51
MG-17 8751.44 8229.87 4214.00
MG-18 8443.69 9852.12 4215.05
MG-1 9 8350.37 9541.19 4212.74
MG-20 8352.48 9223.78 4213.15
MG-21 8350.13 8891.07 4212.60
B-9 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix B
Monitor Well Installation
December 1996
TABLE B-2 (Continued)
SURVEY COORDINATES AND ELEVATION OF NEWLY INSTALLED PIEZOMETERS
SHALLOW PIEZ. I.D. NORTHING EASTING TOP OF CASING
ELEVATION
MG-22 8349.06 8558.99 4213.00
MG-23 8352.62 8229.60 4213.40
MG-24 8352.19 7900.23 4212.00
MG-25 7949.14 9900.44 4214.00
MG-26 7950.38 9551.59 4212.60
MG-27 7952.91 9220.53 4213.53
MG-28 7950.96 8560.10 4213.00
MG-29 7951.03 8237.41 4213.90
MG-30 7952.65 7912.31 4213.30
MG-32 7597.63 9458.73 4213.50
MG-33 7600.24 8892.49 4213.50
MG-34 7626.75 8490.53 4213.60
MG-35 7601.64 8053.61 4213.80
B-10 EarthFax Engineering, Inc.
Fica-1B.DWB 4-10 AUG. i«gs
on
on oo
®D L_b
J
VFP-10 O
o
LD
1=
0 D •
v/FP-ie 6 VFP-15 6 •
r • VFP-14 6 WFP-5 13 Pa fj
•
Chevron
Salt Lake Refinery
Products Company
FIGURE B-1 NEWLY INSTALLED
MONITOR WELLS
np LDJ PM GWW
DR APP GWW
ENGR. l=PJ
DATE __AUG_1996_
0' 600'
EarthFBx
EarthFax Engineering. Inc.
Engineers/Scientists
F1G8-2B.DWC UCSI2-10 AUG. IBM
I
o MG-4
MC-11
MG-24
5
M6-6
MG-2
a
6
S
"RRFT"
MG-5
MG-10 MG-9 VG-8 MG-7
MG-17 MG-16 MG-\15 MG-14 MG-
M&23 M^22 Mj^2A M^20 Mgj
MQr30 MG-29 MGr-2B Cj^29 Mg^i MGb-77 MQ=
Mg35 M§34 MGj33 MGj32
r
PT] •g •
Hi
TT1 13 o o MG CD
MG b o
c •
8 26 s
EarthFax
500'
§gj Chevron Products Company
^ Salt Lake Refinery
FIGURE B-2 NEWLY INSTALLED
PIEZOMETER LOCATIONS
np LDJ PH GWW
DR APP GWW
ENGR LDJ
DATE AUG 1996
0' EarthFax Engineering, Inc.
Engineers/Scientists
Chevron Products Company Appendix B
Salt Lake Refinery Monitor Well Installation
December 1996
ATTACHMENT A
MONITOR WELL DRILL LOGS AND COMPLETION DETAILS
EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Protect Name Solute Transport Model Investigation
Owr/atort: Chevron Products Compony Salt Lake Refinery
Baring/Wtll Number WFP-10
Will location: N 10385.46. E 8714.99
Prefect Number UC-S12-02 Reference ClewjMon (ft> 4215.05
Referanc* Point; Top of PVC Cosing
Data Drlkd: 6-19-96
logged By: CDH Sample Method: Spilt Spoon
Oming Contractor: PC Exploration
Drtlng Method: Hollow Stem Auger Bg Type: CME 550
nm Oeciimmce of C.W. (fl): 10.0
Oete Mernund: 8-8-96
Static W.L (ft): lO.Ot Boring Depth (ft): 20
Boring OJamtter (In): 7-7/8"
W*« Dee* (ft): 20
'.''//.'/Ml
a-
14-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0 - 1" TOP SOIL
Silt, light brown,
fine grained sand.
SYR 6/1.
Some very fine io
Dry. Loose. Abundant roots.
'.':/:/:/:/:,
17-
19-
1 - 3" SILTY SANO:
Brownish Gray. SYR. Sand Is very fine grained.
Damp. Hard. Root structures. Sand content
increasing with depth.
3-10' SILTY CLAY:
•TI Dork brown. Medium plasticity. Slight to mod
Sticky. ML—CL.
Occasional vf sand stringer. Some micaceous sand.
Clay sllt/SMfy Clav. Greenish Gray. Trace of sand.
10 - 12* SILT:
Contains Interbeds of sand.
5CY 6/1.
mempty
mempty
Greenish Gray.
12 - 14.5' CLAYEY SILT:
Greenish gray. Occasional 2" thick beds of sandy
silt. Light gray. wet. Occasional thin beds of clay.
Moderate plasticity, sticky, dark organic laminations.
Occasional orange mottling.
14.5 - 20* CLAY:
Some silt. Moderate plasticity, mod. sticky,
laminated with light gray silty stringers. Wet.
Greenish Gray. sCY 6/1.
mempty
Laminations of dark, organic rich clay. Saturated. Soft.
= Static Water Level
= First Occurrence of Groundwater
WELL COMPLETION DETAILS
— Galvanized Protective Casing
• .H—Surface Pad
-0 - 1.5*
Concrete
-1.5 - 5"
Bentonite Grout
10'
Flush Thread PVC Casing, Sch 40
-5 - 20*
20/40-Mesh Silica Sand
•10 - 20*
2 " PVC 10-Slot Screen. Sch 40
LTD = 201
EsrtiFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Prelect Hame Soluta Transport Model Investigation
Oener/Cwint! Chevron Products Company Salt Lake Refinery
Soring/Well Number: WFP-11
Boring/Well location: N. 9936.59 E. 8882.23
Preftct Number: UC-512-02 Reference Elewrflon (ft): 4212.84
Reference Point: Top of PVC Cosing
Data Drilled: 6-19-96
logged by COH Sample Method: Spilt Spoon
OrMng Contractor. PC Exploration
OrilRng Method: Hollow Stem Auger Rig Type: CME 550
First Occurrence af
Date Measured: 8-
6.W. (ft): 7.0
-8-96
Static WO. (ft): 7.91 Depth (ft): 18
Bering Diameter (In): 7-7/8"
Well Depth (ft): 18
C
x
c
1-
3-
4-
5-
7-
8-
10-
11-
12-
13-
14-
15-
16-
V/.
17-
18-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-8" TOPSOIL:
Silt. Medium Dark Brown, some sand. Organic. Dry.
8" - 2' SANO:
Light Grayish Brown 10YR 6/2. Silty. Very fine
grained sand. Laminated. Damp.
2-6' SILT:
Very Lt. Grayish Brown. Occasional sand laminations.
Occ. clay interbeds. Some orange mottling. Slight
plastic and sticky. Moist.
6 - 9.5' CLAYEY SILT:
Light Olive Gray. 5Y 6/1. Some very fine sand.
Micaceous. Moderate plastic, slightly sticky.
Moist to wet.
9.5 - 14* CLAY:
Yellowish Gray 5Y 7/2. Very plastic and sticky.
Laminated. Moist. Increasing silt with depth.
14 - 16.3* SILTY CLAY:
Greenish Gray. 5GY 6/1.
grained sand laminations.
Sticky. Wet. Very soft.
Occasional vf to fine
Moderate to very plastic
16.3 - 17.8' SILT:
Dark Greenish Gray. 5G 4/1. Some very fine sand.
Some clay laminations. Micaceous. Wet.
\
17.8 - 18* SILTY CLAY:
Black. Organic rich. Some fery fine to coarse
sand at bottom of sample.plastlc. Organic rich. Wet.
_X. = Static Water Level
SL. = First Occurrence of Groundwater
WELL COMPLETION DETAILS
~- Galvanized Protective Cosing
-Surface Pad
0 - 1.5'
Bentonite Grout
-0 - 3*
2 " Flush Thread PVC Casing. Sch 40
-1.5 - 18'
20/40-Mesh Silica Sand
•3 - 18'
2 " PVC 10-Slot Screen, Sch 40
TD = 18'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Prelect Nam*: Solute Transport Model Investigation
Owner/ClHjnt; Chevron Products Company Salt Lake Refinery
Bering/Well Number WFP-12
Boring/Well LoceHon: N. 9073.9 E. 9329.77
Project Number UC-512-02 Reference Elevation (ft): 4212.29
Reference Point; Top of PVC Cosing
Oeto Drilled: 6-20-96
Logged By. COH Sample Method: Split Spoon
OriMng Contractor PC Exploration
Drillng Method: Hollow Stem Auger Rig Type: CME 550
Flrit Occurrence of
Dote MoBiurod: 8-
CW. (ft):
-8-96
7.0 Static Wi. (It): 6.77 Boring Depth (ft): 25
Boring Diameter (In): 7-7/8*
WeH Depth (ft): 25
2-
10-
14-
16-
18-
20-
22-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-8" TOPSOIL:
v. Sandy Silt. Organic. Dry.
8" - 6' SILTY SANO:
Light Grayish Brown to Light Brown. Very fine to
fine grained sand. Laminated. Slightly plastic
and sticky.
6-9' SILTY CLAY:
Light Olive "Gray. 5Y 6/1. Some orange mottling.
Sticky, plastic. Occasional very fine grained
silty sand laminations.
9 - 11' SILTY CLAY:
Medium Bluish Gray. SB 5/1.
Plastic. Soft.
Laminated. Sticky.
11 - 13.8' CLAY:
As Above but with some silt.
Brown sandy silty clay layers.
Occasional Orange
13.8 - 16' SAND:
Medium Bluish Gray. SB 5/1. Silty with
clayey slit lenses. Very fine to medium
to SR. Stiff. Hard. Saturated,
micaceous grains. Calcareous.
occ. silt and
grained. SA
Laminated. Some
16-21' CLAY:
Dark Greenish Gray.
Sticky, mod. plastic,
laminations.
SG 4/1. Some sift, laminated.
Soft. Wet. Occasional silt
21 - 22' CLAYEY SILT:
Very Oark Gray to Block. Some vf sand Interlamtnatlons.
Slight to mod sticky and plastic. Organic rich. Wet.
22 - 25' SANDY SILT:
Dark Greenish Gray. 5G 5/1. to Medium Bluish Gray.
SB 5/1. Slightly sticky and mod. plastic. Wet. Soft.
WELL COMPLETION DETAILS
— Galvanized Protective Casing
-Surface Pad
0-2'
Bentonite Grout
-0 - 2.5'
2 " Flush Thread PVC Casing, Sch 40
-2-25'
20/40-Mesh Silica Sand
- 22.5*
PVC 10-Slot Screen. Sch 40
TD = 22.5'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Prefect Nome Soluto Transport Modal Investigation
Owwr/qhcrt: Chevron Products Company Salt Lake Refinery
Boring/Well Number:
Borifi0/W*tf Location*
WFP-13
N. 8506.76 E. 9476.S
Profeet Number: UC-512-02 Reference Elevation (fl): 4212.53
Reference Polnh Top of PVC Cosing
Dots MM: 6-20-96
logged By: CDH Sample Method: Split Spoon
OriMng Contractor: PC Exploration
Drilling Method: Hollow Stem Auger Rig Type: CME 550
First Occurrence of CW. (ft):
Oate Measured: 8-8-96
7.0 Stone Wi. (ft): 7.27 Boring Depth (ft): 18
Boring Diameter (In): 7-
Well Depth (ft): 18
7/8*
iii
2-
3-
4-
5-
6-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
\
0 - 0.5' TOP SOIL:
Sandy Silt. Brownish Gray. SYR 4/1. Slight to
mod, plastic. Slightly sticky. Damp.
\
0.5 - 1' SILTY SANO:
Light Brownish Gray. 5YR 6/1. Fine to very fine
groined. Lomlnoted. Roots. Moist.
1 - 5.5" SANDY SILT:
Pais Yellowish Brown. 10YR 6/2. Laminated.
Firm. Roots. Moist to wet. Sand Is vf to fine.
5.5 - 7* SAND:
Pale Yellowish Brown. 10YR 6/2. Very fine to
coarse sand. Coarsens downward. Minor silt.
Grains are SA - SR. Saturated.
8^
mm mm
7-8' CLAYEY SILT:
Pale Olive to Ught Olive Green. 10YR 6/2-5Y 5/2.
Mod. plastic 3c mod. sticky. Clay increasing with depth
10-
IV
> t / , , >' < >//
!>/>//
'//,
t f >/ /
12-%'///,
13-
> r / >
it"
i / / '
• / t /
14- ' '
15-
16-
17-
18-
* / /
/1 / >
/11 /
8-9' SANDY SILT:
Light Olive Gray 5Y 5/2. vf to fine sand. Laminated.
Orange mottling. Slight sticky and plastic. Wet.
9-16' SILTY CLAY:
Greenish Gray. 5Y 6/1 to Bluish Gray. 5R 5/1.
Moderate sticky and plastic. Laminated. Occasional
vf to fine sand laminations. Stringers In very thin
beds. Wet. Soft.
Sand lens. Approx. 1.5* thick, vf to fine, silty.
16 - 17.5* SANDY SILT:
Medium 8luish Gray. SB 5/1. Very fine grained sand
Slightly to mod. plastic. Slightly sticky. Some
minor clay. Soft. Wet. Clay increases w/ depth.
\
17.5 - 18' SAND:
Medium to Dark Bluish Gray. Some slit. Very fine
to medium grained. . SA - SR. Laminated. Becomes
coorser with depth. Wet. Soft to firm.
. = Static Water Level
SL. - First Occurrence of Groundwater
WELL COMPLETION DETAILS
Galvanized Protective Casing
Surface Pad
-0 - 2'
Bentonite Grout
-0 - 3'
2 " Flush Thread PVC Casing. Sch 40
-2 - 18'
20/40-Mesh Silica Sand
-3 - 18'
2 " PVC 10-Slot Screen. Sch 40
TD = 18'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Prefect Name: Solute Transport Model Investigation
Owner/Client: Chevron Products Company Salt Lake Refinery
Boring/Well Number: WFP-14
Bodng/Well Location: N. 8565.54 E. 8358.27
Prefect Number UC-512-02 Reference elevation (ft): 4212.52
Roference Point: Top of PVC Cosing
Drilled: 6-20-96
by CDH Sample Method: Split Spoon
Orillng Contractor PC Exploration
Drilling Mono* Hollow Stem Auger Rig Type: CME 550
FM
Date
Occurrtnct of
Meosured: 8'
CW. (ft):
-8-96
Static Wi, (ft): 6.78 8orlng Depth (ft): 18
Boring Diameter (In): 7-
WeH Depth (ft): IB
7/8-
C
X
1-
2-
4-
5!
x
mm
6-
8-
10-
11-
12-^
15-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-8" TOPSOIL:
Sandy Silt. Yellowish Gray. 5Y 7/2. Sand-vf. roots.
8" - 3' SAND:
Very pale orange 10YR 8/2 to 10YR 6/2. Coarses from
vf sand and silt to coarse w/ fine gravel at base.
Laminated to thin bedded. SA-SR. Wet. Loose.
i
i
3 - 4.5' SANDY SILT:
Light Olive Gray 5Y 6/1. Very fine grained sand,
laminated. Slight plastic & sticky. Some orange
mottling becoming sandy with depth. Wet. Soft.
4.5 - 7' CLAYEY SILT:
To silty clay Interbedded. 1 Gley 6/1. Greenish
Gray. Some organic matter. Mod. plastic * sticky.
Occasional thin vf sand laminations. Wet. Soft.
7-9' SILT:
Bluish Gray. 2 Gley 6/1. Some very fine grained
micaceous sand. Laminated. Wet. Soft.
9 - 12.5' SILTY SAND:
Light Gray 10YR 7/2. to Bluish Gray 2 Gley 6/1.
Very fine to fine grained, micaceous, laminated. Wet.
12.5 - 17.5' CLAY:
Bluish Gray. 2 Gley 6/1. Some stiff, trace of
sand. Mod. sticky - mod. plastic. Laminated.
Wet. Soft.
17.5 - 18' SANDY SILT:
Very Dark Gray. 5Y 3/1. Organic, laminated.
Odor. Slight plastic to mod plastic. Slight to
mod, sticky. Moist to wet. Soft to firm.
= Static Water Level
SL. = First Occurrence of Groundwater
i
WELL COMPLETION DETAILS
*- Galvanized Protective Casing
-Surface Pad
0-2'
Bentonite Grout
- 2.5'
" Flush Thread PVC Casing, Sch 40
-2 - 18'
20/40-Mesh Silica Sand
•2.5 - 17.5'
2 " PVC 10-Slot Screen. Sch 40
TD = 17.5'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Prefact Nam*: Solute Transport Model Investigation
Qener/Clkfit Chevron Products Company Salt Lake Refinery
Bering/Well Number WFP-15
Boring/Well Location: N. 9051.65 E. 8402.86
Prefect Number UC-512-02 Reference Elevation (ft): 4212.69
Reference Point: Top of PVC Cosing
OrllM: 6-21-96
By: COH Sample Method: Split Spoon
Mllng Contractor PC Exploration
Ortllng Method: Hollow Stem Auger Rig Type: CME 550
First
Oate
Occurrence of G.W. (ft): 7.0
Measured: 8-8-96
Static Wi. (ft): 7.0 Depth (ft): 17.5
Bering Oiameter (In): 7-7/8*
Well Depth (ft): 17.5
2-
3-
4-
5-
7-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0 - 1.2* TOPSOIL:
Topsoil Sandy silt. Light Brown. 10YR 6/2.
Abundant roots. Dry. Loose.
1.2 - 7.5' SANDY SILT:
Pinkish Gray. 7.5YR 1/2. to Greenish Gray. Gley.
6/1. Some clay, vf sand. Slight to mod sticky.
Some orange mottling. Moist.
'A'/.
mm 8*~ -vvvv
' t f 'vs, I,,
V/,
',7,
10-
11-
12
m
7.5 - 9.5' SILTY CLAY:
1 Gley 6/1. Greenish Gray. Some vf sands. Mod.
to very plastic and sticky. Wet. Some orange
mottling. Laminations. Soft.
9.5 - 10.5' SILTY SANO:
Blush Black. 2 Gley 10B 2.5/1. Very fine to fine
grained. Laminated. Organic rich. Loose. Wet.
10.5 - 12.5' CLAY:
Dark Bluish Gray. 10B 3/1. Very sticky,
plasticity. Some silt. Wet. Very soft.
Moderate
13-
12.5 - 16* SILTY CLAY:
Dark Gray. Gley N4/1. Laminated. Moderate
plasticity, sticky. Trace of sand. Occasional
dark gray to black organic layer. Wet. Soft.
14
15-
16-
17-
7.5-
16 - 17.5* SANDY SILT:
With slit Interbeds. Blue Gray. 10B 5/1 to dark
BL Gray. 10B 3/1. Sands are dark. Silt is sticky
to moa. sticky. Moderate plasticity. Sands are
vf grained, micaceous. Wet. Soft.
JZ. = Static Water Level
SL. — First Occurrence of Groundwater
z
I
WELL COMPLETION DETAILS
-Galvanized Protective Casing
-Surface Pad
0-2'
Bentonite Grout
-0 - 2.5'
2 " Flush Thread PVC Casing, Sch 40
-2 - 17.5'
20/40-Mesh Silica Sand
-2.5 - 17.5'
2 " PVC 10-Slot Screen, Sch 40
TD = 17.5'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
GEOLOGIC LOG COMPLETION DETAILS
15
4 _
10
12
13
18
-mm
-mr
SURFACE ELEVATIOft 4223.33
DESCRIPTION CONCRETE
SURFACE
roorEcncN
CONSTRUCTION FILL: BANK RUN GRAVELS ANO SANDY
GRAVEL IMPORTED AS ENGINEERED FILL. 4* STAINLESS
STEEL CASINO'
5/90
SILTY CLAY: LT. GRAY TO UGHT BROWNISH GRAY.
DAMP TO MOIST. STIFF. SOMEWHAT MOTTLED.
MOO ER ATE PLASTICITY. FINE TO MEDIUM GRAVEL
CLASTS. FINE TO MEDIUM SANDS.
SAND W/SILTY SAND: LT. OLIVE GRAY. VERY MOIST
TO SATURATED. DENSE. FINE TO COARSE.
SUB-ANGULAR TO SUB-ROUNDED CLASTS.
LSD
CLAYEY SILT W/SAND: DK. GRAYISH BROWN. VERY
MOIST. FIRM. LOW TO MODERATE PLASTICITY.
SOME MOTTLING.
r 10 SLOT
STAINLESS
STEEL SCREEN.
SAND: LT. OLIVE GRAY TO GRAY. SATURATED.
MEDIUM DENSE FINE TO MEDIUM SUB-ANGULAR
TO SUB-ROUNOED SAND GRAINS. MICACEOUS.
CLASTS OF WEATHERED ROCK.
2/90
INITIAL
LEVEL
li
•
s
20-tO MESH
SIUCA SANO
#8?
..••.•._•: •vv'-.:.::. CAP
\ :
.LOC(UNO WELL
CAP
r PROTECTIVE
• STEEL SURFACE
CASING
ORANUOR
BENTONITE
TD:ltr
EarthFax
Enoineerina Inc.
CHEVRON USA INC.
SALT LAKE CITY REFINERY
SALT LAKE CITY, UTAH
MONITOR WELL
EF-1
Page
1
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
i
o
i -3
6
o
X
Ml
••'i'C?.:"C
SURFACE ELEVATION: 421373
DESCRIPTION CONCRETE
SURFACE
PROTECTION
PAD
CONSTRUCTION FILL BANK RUN GRAVELS AND SANDY
GRAVEL IMPORTED AS ENGINEERED FILL. S/2S/90
4* STAINLESS
STEEL CASING
CLAYEY SILT/SILTY CLAY. GRAYISH BROWN. DAMP TO
MOIST. FRIM. MOO. PLASTIC, FRIABLE,
TRACE ORGANICS.
SANDY SILT W/CLAY. LT. OLIVE GRAY. DAMP TO
VERY MOIST. FIRM TO STIFF. MOD. PLASTICITY.
VERY FINE TO FINE-GRAINED. SOME CEMENTED
SECTIONS. FINE SUB-ROUNDED GRAVEL.
10
•n _]
=1
SILTY SAND. LT. BROWNISH GRAY-OLIVE. MOIST
TO SATURATED.. MEDIUM DENSE, VERY FINE
TO FINE SUB-ANGULAR SAND GRAINS.
OCCASIONAL THIN CLAY STRINGER SOME
CEMENTED CALCAREOUS SECTIONS.
CLAYEY SILT. BROWN. DAMP TO MOIST. FIRM TO
STIFF. MOa PLASTICITY, THIN MICACEOUS
PARTINGS. HIGHLY CALCAREOUS
SILTY CLAYEY SAND TO SILTY SAND W/GRAVEL. PALE
BROWN TO OLIVE GRAY. MOIST. FIRM TO
STIFF. MOa PLASTICITY. SUB-ROUNDED GRAVELS
AND SILTY NODULES.
12 _
13
14 :
SILTY SAND. OLIVE TO GRAY. MOTTLED. VERY
MOIST TO SATURATED. MEDIUM DENSE.
MICACEOUS. THIN SILTY PARTINGS.
4*10 SLOT
STAINLESS
STEEL SCREEN
19 —
20
CLAYEY SILT W/SANO. OLIVE GRAY. MOIST. MEDIUM
DENSE. MOD. PLASTICITY. MEDIUM SUB-ROUNDED
SAND GRAINS. MODERATELY CALCAREOUS.
SAND. LT. OUVE GRAY TO GRAY. SATURATED. MEDIUM
DENSE. FINE TO MEDIUM SUB-ANGULAR TO SUB-
ROUNDED SAND GRAINS. MICACEOUS. CLASTS OF
WEATHERED ROCK.
Ln]
LOCKING WELL
CAP
a* PROTECTIVE
.STEEL SURFACE
CASING
2/90
•W INITIAL
~=~ LEVEL
CAP
TD: 18*
EarthFax
EnQlnooring. inc
CHE/RON USA INC.
SALT LAKE CITY REFINERY
SALT LAKE CITY. UTAH
MONITOR WELL
EF-2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
GEOLOGIC LOG COMPLETION DETAILS
o
0 .
15
16
18
19
20.
ta • O _
3 —
10 — • — ;^>A\
DESCRIPTION
SURFACE ELEVATIOI* IT.SZt,
CONCRETE
SURFACE
PROTECTION
LOCXJNQ WELL
CAP
•* PROTECTIVE
^ STE EL SURFACE
CASING
CONSTRUCTION FILL: BANK RUN GRAVELS ANO SANDY
GRAVEL IMPORTED AS ENGINEERED FILL
*' STAINLESS .
STEEL CASINO
CLAYEY SILT/SILTY CLAY: DARK GRAYISH BROWN
TO PALE YELLOW. VERY MOIST. FIRM TO
STIFF. MODERATE PLASTICITY. SOME ORGANICS.
SOME DESICCATION.
5/90 yr
SILTY SAND: GRAYISH BROWN. VERY MOIST.
SILTY CLAY/CLAYEY SILT: LT. GRAY. VERY MOIST
TO SATURATED. FIRM TO STIFF. MODERATE
PLASTICITY. HIGHLY CALAREOUS.
SAND/S1LTY SAND: OLIVE GRAY TO GRAYISH BROWN.
VERY MOIST TO SATURATED. MEDIUM DENSE
THIN SILTY CLAY STRINGERS. FINE TO VERY-
FINE SAND. SUB-ROUNDED. HIGHLY MICACEOUS.
MODERATELY CALCAREOUS.
12 Z;^|
HH
ei 3
N N
SILTY CLAY W/SAND: LT. OUVE GRAY TO OLIVE GRAY.
VERY MOIST TO SATURATED. SOFT TO FIRM,
MEDIUM DENSE T NODULES OF WELL CEMENTED,
HIGHLY CALCAREOUS SILT ANO FINE SAND.
MODERATE PLASTICITY. THIN SAND PARTINGS.
SAND: DK. GRAY. VERY MOIST TO SATURATED. DENSE
VERY FINE TO MEDIUM SUB-ANGULAR SANO
GRAINS. HIGHLY MICACEOUS.
LO]
GRANULAR
BENTONITE
2/90 _ INITIAL
LEVEL
20-10 MESH
SIUCA SANO
CAP
< 10 SLOT
STAINLESS
STEEL SCREEN ..
TD:16*
EarthFax
Enoinoerina Inc.
CHEVRON USA INC.
SALT LAKE CITY REFINERY
SALT LAKE CITY. UTAH
MONITOR WELL
EF-3
Psae
1
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
a.
LU
Q
ELEVATION AT TOP OF SS. CASINO: 421&7
DESCRIPTION LOCKING WELL*
CAP
V -4-
=• 2/5/91
0-3' GRANULAR FILL CONCRETE
SURFACE
PROTECTION
PAD
7
3XV4XT SILTY CLAY. DARK GRAY, 5Y 4A DAMP, MEDIUM TO
HIGH PLASnCtTY. WET AT 4'.
4J0-6\0* SILTY CLAY. DARK GRAY, 5Y 4/1 WET. SOME
ROUNDED GRAVEL SOFT TO FIRM.
PPEN = 10-15 TSF
T. 316 STAINLESS
STEEL CASING
7 3/4"
DRILLHOLE
ejO-aS" SILTY CLAY. LIGHT GRAY, 5Y 7/1
vsss
—
&5-&7 SILTY SAND. GRAY, 5Y 571 UNIFORM, VERY
FINE GRAINED SAND.
67-&s7 CLAYEY GRAVEL LIGHT GRAY, 5Y 7/1 GRAVEL
IS IRREGULAR UP TO T, MODERATE PLASTIC FINES.
10
S£-10LO* SILTY SAND/SILTY CLAY. LIGHT GRAY, 5Y 7/1
MICACEOUS. SAND VERY FINE GRAINED,
VARYING, OCCASIONAL FINE GRAVEL, FINES
ARE MEDIUM TO HIGH PLASTICITY.
s' S N
ss XLO-TL7 SILTY CLAY. OLIVE GRAY. 5Y 5/2, STICKY,
^ s V s S si MEDIUM TO HIGH PLASnCtTY.
ISSSSltt
12
14
16
TL2-14jy SAND. RNE GRAINED. DARK GREENISH GRAY,
5GY 4/L UNIFORM, MICACEOUS.
14iM6.0r SANO AND SILTY CLAY, THINLY BEDDED. HINT
OF VARYING.
m
m
.'.V.
pa
1\V..«
< STEEL SURFACE
CASING
BENTONfTE
CEMENT GROUT
BENTONITE SEAL
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-2D
Page
1
of
3
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
GEOLOGIC LOG COMPLETION DETAILS
DESCRIPTION
leXMBXT CLAYEY 3ILT. DARK GRAY. SY 4/1 VERY SOFT,
PJ-EN a OS TSF, STICKY. MEDIUM TO HIGH
PU^CTTCrrY.
18
— »y li ?. \ 1ao-2a4•
—*SN^
22
26
28
30
SILTY SAND DARK GRAY, 5Y 4/1, UNIFORM,
MICACEOUS, SAND VERY FINE GRAINED. CLAY
IS DARK BROWN, WYR 3/3.
Z. 316 STAINLESS
STEEL CASINO
204-22XT SILTY CLAY. DARK GRAY. 5Y 4/1 STICKY,
MEDIUM TO HIGH PLASTICITY, VERY SOFT.
PPEN < 05 TSF
22A-240* SAND. VERY FINE GRAINED, DARK GRAY TO
OLIVE GRAY, 5Y 4/V4/2, UNIFORM. MICACEOUS,
THIN LAYERS OF CLAY, BROWN, 7£ YR 4/2.
24j0-28tf SILTY CLAY. GRAY TO BLACK, 10 YR 5/3 TO 5Y
4A BROWN TO BLACK OXIDATION STAINING
THROUGHOUT. VERY SOFT. RPEN < 05 TSF>
28A-34A- SILTY CLAY. DARK GRAY TO BLACK. 5Y 4/1
TO BLACK. THIN LAYERS OF FINE SAND AT
295. 308*. 335 AND 3&8'-34Xr.
32
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
®
8ft
— '-Xj
tiff
m
*••.••*«•* f
./si j
BENTONITE
'SEAL
18-30 MESH
SIUCA SANO
MONITORING WELL
EF-2D
Pag*
2
of
3
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
GEOLOGIC LOG COMPLETION DETAILS
DESCRIPTION
34.
SILTY CLAY (AS ABOVE).
34A-3&? SANO, FINE GRAINED. GRAY, 5Y 4/1 UNIFORM,
MICACEOUS. OCCASIONAL FRACTURED GRAVELS.
3&2-38XT SILTY CLAY. SOFT AND STICKY, MEDIUM TO
HIGH PLASTICITY, WITH THIN LAYERS OF SAND.
2", 314 STAINLESS
STEEL SCREEN
cooicr SLOT)
3&CMOXr SAND. RNE GRAINED. GRAY, 5Y 4/1, UNIFORM,
MICACEOUS. OCCASIONAL THIN GRAVEL AND
CLAY LENSES
38.
42
44
46
48
4O0-44AT SILTY CLAY. DARK GRAY, 5Y 4/1. SOFT AND
STICKY, MEDIUM TO HIGH PLASTICITY,
TRACE MICA AND FINE GRAVEL ROUNDED
TO V8*.
44XV48XT SAND. FINE GRAINED. DARK GREENISH GRAY,
5GY 4/1 UNIFORM, MICACEOUS.
— mm
- mm
STAINLESS
STEEL END CAP
ARTESIAN FLOW
m.
TD-48'
EarthFax
Engineering, Inc
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-2D
Page
3
of
3
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
0. UJ O
a o
o
i
sss SS
5s
s s s
ssssss
DESCRIPTION
ELEVATION AT TOP OF SS. CASINO: 4220.1
LOCKING WELL-"
0-3AT GRANULAR RLL
aO-SjO* CLAY. GRAY, 5Y 5A SOFT. TRACE COARSE SANO
AND VERY RNE GRAVEL MEDIUM TO HIGH
PLASTICITY.
5JJ-7.0- SILTY CLAY. GRAY TO DARK GRAY. 5Y 5/1 TO 4/1,
STIFF, MEDIUM TO HIGH PLASTICITY, OCCASIONAL
ANGULAR GRAVEL PJ>EN = 1S-20 TSF.
JO-7S SILTY CLAY. GRAY, 5Y 5/1. STIFF, MEDIUM TO HIGH
PLASTICITY, MICACEOUS. P.PEN = V3-Z0 TSF.
Si
SILTY SAND, FINE GRAINED. YELLOWISH BROWN.
10YR 5/4, MICACEOUS
s \ s^s ss ss> s s
s s sss
a2-TLff SILTY CLAY. DARK GRAY, 5Y 4/1 STIFF,
MEDIUM TO HIGH PLASTICITY.
12
UO-13XT SILTY CLAY. GRAY. 10YR 571 MEDIUM TO HIGH
PLASTICITY, MEDIUM GRAINED SAND LENSE-AT
125*. VERY MICACEOUS. SOFT TO RRM,
P.PEN = O5-0.75 TSF.
14
ss
Ks^ 1
sss
ss s
888
-00-175' SILTY CLAY. GRAY. 10YR 5A SOFT AND STICKY.
THIN FINE GRAINED SAND LENSE AT US AND
153'. FINE TO MEDIUM GRAINED MICACEOUS SAND
LENSE AT 16JU*. GRAYISH BROWN. 10YR 5/2,
VERY STIFF, PPEN = 2JD-2B TSF.
16
EarthFax
Engineering, Inc
CAP
V ^ STEEL SURFACE
CASINO OJ
- 2/9/91
7 BENTONITE
CEMENT GROUT
Sis...*. CONCRETE
mm SURFACE
PROTECTION
PAD
T. 3» STAINLESS
STEEL CASING
7 3/4-
DRILLHOLE
18-30 MESH
SIUCASAND
iv.:>V'.:
•SAt.
r. 316 STAINLESS
STEEL SCREEN
(OOIO- SLOT)
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-4
Pag*
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
0.
LU
a
16 .
O
x DESCRIPTION
SILTY CLAY (AS ABOVE)
17.5-177 SANO. FINE GRAINED. MICACEOUS.
STAINLESS
STEEL ENO CAP.
18-30 MESH
SILICA SAND
18
20
22
• ;<>•."*-»••
•-'•'o.'t'0
••?..•<?• •
-.0 -1s<..< *>
17J-19XT SANDY GRAVEL ROUNDED, UP TO T.
1&0-2lCr SANDY GRAVEL OUVE GRAY. 5Y 4/2, MICACEOUS.
GRAVEL IS IN VERY FINE GRAINED SAND MATRIX
21.0-23.0' SAND. FINE GRAINED. OUVE GRAY. 5Y 5/2.
UNIFORM. MICACEOUS, SOME FINE GRAVEL
WELL ROUNDED.
ARTESIAN FLOW
HOLE COLLAPSE
TD: 23-
24
26
28
30
32
EarthFax
Engineering, Inc
CHEVRON. USA
SALT LAKE REFINERY
MONITORING WELL
EF-4
Pag*
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
GEOLOGIC LOG COMPLETION DETAILS
10
=1
ELEVATION AT TOP OF SS. CASING: 4225.4
DESCRIPTION LOCKING WELL-
CAP
0-2AT SILTY CLAY. VERY DARK GRAY. 10YR 3/\ ORGANIC
MATERIAL
•L7
2A-4.0r SILTY CLAY. LIGHT GRAY, TOYR 7/2. WET, SOFT.
AND STICKY. MEDIUM TO HIGH PLASTICITY. SOME
FINE SAND AND OCCASIONAL GRAVEL
SURFACE
PROTECTION
PAD
T. 318 STAINLESS
STEEL CASING
AjyiSS SILTY SAND. UNIFORM. GRAY TO LIGHT OUVE
GRAY, 25Y 5/0 TO 5Y 6/2, VERY FINE GRAINED.
7 3/4'
DRILLHOLE
7.0-8XT CLAY. PALE BROWN, 10YR 8/3. MEDIUM TO HIGH
PLASTICITY. TRACE SILT AND VERY FINE GRAINED
SAND
aO-IOCf SILTY CLAY. OLIVE GRAY. 5Y 4/2. TRACE OF
SAND. SOFT TO FIRM, PJ»EN = 025-075 TSF. 7. 318 STAINLESS
STEEL SCREEN
(CLOto* SLOT)
lOO-ltO* SAND, FINE GRAINED.
COARSE GRAINED.
SOME MEDIUM TO
nO-22ir SAND. OUVE GRAY, 5Y 5/2, INCREASING COARSE
GRAINED SAND AND FINE GRAINED GRAVEL WELL
ROUNDED TO 2" AT 15'.
LQ3
mm
m ...
m I
.STEEL SURFACE
CASING
BENTONITE
CEMENT GROUT
V SWL ' 21
~ 2/9/91
18-30 MESH
_ SOJCA SANO
EarthFax
Engineering, Inc.
CHEVRON. USA
SALT LAKE REFINERY
MONITORING WELL
EF-5
Page
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
GEOLOGIC LOG COMPLETION DETAILS
ut
Ul
a. ui a
16
18
s -J
o
20
22
m
:v
24
26
28
30
32
DESCRIPTION
SAND (AS ABOVE)
STAINLESS
STEEL END CAP
22JJ-24AT CLAY. VERY DARK GRAY, 25YR 3/L VERY SOFT
AND STICKY. MEDIUM TO HIGH PLASTICITY,
PPEN < CL25 TSF.
1S-30 MESH
SILICA SAND
2
i;::-:-V:-V;.-:':.--iv'.,-
•tpi
mm
S:'#"w<":A'!.::w:
vmmm
• HOLE PLUG
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-5
Page
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
0.
LU
Q
— sT^FF
ssss
10
ca o
o
z
ssss
•* - s s
—itt^'
^ > ^
sss
ss
s
sss Jssss
ss
s v ss» ss'1
sssssf
, sss
^SSs
ss*
DESCRIPTION
ELEVATION AT TOP OF S-S. CASING: 42202
LOCKING WELL
CAP
O-aO* GRANULAR FILL
3AVS1T SILTY CLAY. VERY DARK GRAY. 10YR 3/1 TO LIGHT
BROWNISH GRAY. 10YR 6/2. DAMP. SOFT AND
STICKY. MEDIUM TO HIGH PLASTICtTY.
50-7.0* SILTY CLAY. GRAY. 5Y 5A DAMP. SOFT AND
STICKY. MEDIUM TO HIGH PLASTICITY.
zo-axr SILTY SAND VERY RNE GRAINED. GRAY TO OLIVE
GRAY. 5Y 5/1 TO 5Y 5/2, UNIFORM, MICACEOUS,
SILT GRADES LESS WITH DEPTH.
00-108' SILTY CLAY. OUVE GRAY 5Y 5/2 TO LIGHT
YELLOWISH BROWN. 25Y 6/4, FIRM. MEDIUM TO
HIGH PLASTICITY. PJ»EN = 05-10 TSF.
1O8-U0- SILTY SANO. VERY FINE GRAINED. DARK GRAY.
5Y 4A UNIFORM. MICACEOUS.^
v^sss
12
T10-12.0' SILTY CLAY. YELLOWISH BROWN, 10YR 5/4. VERY
SOFT. MEDIUM TO HIGH PLASTICrTY. OCCASIONAL
GRAVEL TO 1' ROUNDED. PPEN < 025 TSF.
12A-ia2> SILTY SAND. OUVE GRAY, 5Y 4/2. VERY FINE
GRAINED, UNIFORM, MICACEOUS
14 s
16
,s' ssH _ ss'1
IP
s^s ss ss
ss
ss
I
^s ss
132-16Xr SILTY CLAY. DARK GRAY, 5Y 4/1 VERY SOFT AND
STICKY, MEDIUM TO HIGH PLASTICITY.
PPEN < 055 TSF.
STEEL SURFACE
CASING
am BENTONTTE
CEMENT GROUT CONCRETE
SURFACE
PROTECTION
PAD
2". 318 STAINLESS
STEEL CASING
— SWL - 20
2/5/91
7 3/4'
DRILLHOLE
K:.".-s-i
18-30 MESH
. SILICA SANO
.•v.*
2*. 318 STAINLESS
STEEL SCREEN
(OOIO* SLOT)
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-6
Page
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
DESCRIPTION
sss sss
s>. S"!
iaO-17A* SILTY SANO. DARK GRAY, 5Y 4A VERY FINE
GRAINED, UNIFORM. MICACEOUS.
T7B.19U0* SILTY CLAY/3ILTY SAND. DARK GRAY. 6Y 4/1,
THINLY BEDDED LENSES.
STAINLESS
STEEL END CAP
18.0-22.Cr SILTY CLAY. VERY DARK GRAY, 5Y 3/1. VERY
SOFT AND STICKY, MEDIUM TO HIGH PLASTICITY.
P.PEN < 025 TSF.
22
s^
ss 5 ssss
!5 SSS
ss
5s
22J3-23XT SILTY SAND.
GRAINED.
BROWN. 10YR 5/3. VERY FINE
23JJ-25i? SILTY CLAY. VERY DARK GRAY, 5Y 3A VERY
SOFT AND STICKY, MEDIUM TO HIGH PLASTICrTY,
OCCASIONAL THIN LAYERS OF SILTY SAND.
BROWN, 10YR 5/3, VERY FINE GRAINED.
mm
:wsss>
P1P&
m
I i
HOLE PLUG
TD-251
26
28
30
32
EarthFax
Engineering, Inc
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-6
Page
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
z
H 0. LU
o
a o
o
z
DESCRIPTION
0-2JU* GRANULAR FILL
BBSS
sN ss S S S S
55 \ S SSS *3 ss
ss sss
sss ss sss ss sss ss sss sss
1 sss ss ssss ss v S S
2JD-4JX SILT AND CLAY. GRAYISH BROWN. 10YR 5/2,
DAMP, MEDIUM TO HIGH PLASTICfTY.
4JJ-6XT SILTY CLAY. LIGHT OUVE GRAY. 5Y 8/2, WET.
OCCASIONAL IRREGULAR GRAVEL TO T.
mm &0-65* CLAYEY GRAVEL LIGHT OUVE GRAY, 5Y 8/2.
SB?
65-&0* SILTY CLAY. PALE OLPVE 5Y 8/3, SOFT AND
STICKY. OCCASIONAL VERY FINE SAND, MEDIUM
TO HIGH PLAsncrrY.
8ju-ft5* SANDY CLAY. YELLOWISH BROWN, 10YR 5/4,
MICACEOUS, SAND IS VERY FINE GRAINED.
95-100* CLAYEY GRAVEL UGHT OUVE GRAY, 5Y 6/2.
12
ssss TOO-135" SILTY CLAY. UGHT YELLOWISH BROWN,
10YR 6/4, SOFT AND STICKY, MEDIUM TO
HIGH PLASTICITY, THIN FINE GRAINED SAND
LAYER AT Tiff, PPEN < 025-05 TSF.
135-14.0*
ssssss*
SAND, FINE GRAINED. GRAY, 5Y 5/t UNIFORM,
MICACEOUS..
mm 14.0-15J* SILTY SAND. FINE GRAINED. MICACEOUS
15.0-1OS' SAND. FINE GRAINED. DARK GREENISH GRAY.
5GY 4/1 MICACEOUS.
ELEVATION AT TOP OF OS. CASING: 421tt.1
LOCKMQ WELL
CAP
CONCRETE
SURFACE
PROTECTION
PAD
7. 318 STAINI
STEEL CASINO
7 3/4*
DRILLHOLE
7. 316 STAINLESS
STEEL SCREEN
(OJOIO* SLOT)
CB3 „ STEEL SURFACE
CASING
7 BENTONrrE
CEMENT GROUT
m
m V SWL » 3.1
- 2/5/91
16-30 MESH
SIUCASAND
I
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-7
Page
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
GEOLOGIC LOG COMPLETION DETAILS
0. ID
Q
16 .
a o
u
i
DESCRIPTION
18
20 .
22.
24.
26
SAND (AS ABOVE).
"KM
s S
5.555
:5s
IssS
ssss
s\
~~ ss
*55
5555:
555
s« SS
55N ss
55
s*.
sss
^555 sss
ss 5 5 5 5 ss 55 SS
ss;
s s
ssss
SS
sss;
55
184-216' SILTY CLAY. VERY DARK GRAY, Z5Y 3/1 VERY
SOFT AND STICKY, MEDIUM TO HIGH PLASTICITY,
PPEN < 025 TSF.
STAINLESS
STEEL END CAP
215-220* SILTY SAND. DARK GRAYISH BROWN, 10YR 4/2.
VERY FINE GRAINED, UNIFORM. MICACEOUS.
220-240- SILTY CLAY AND SILTY SAND. VERY DARK GRAY.
25Y 3/1 AND DARK GRAYISH BROWN, 10YR 4/2
THIN LENSES. T-5' THICK.
24AV26.0* SILTY CLAY. VERY DARK GRAY. 25Y 3A VERY
SOFT AND STICKY. MEDIUM TO HIGH PLASTICITY.
OCCASIONAL THIN LENSE OF SILTY SAND
m
- . • -V.. A
riv.*--i-'.i '5:""'.''''";v>j
.X-v-:t.->V.'^.'-\'l*Vi-
"iV:V*v;>.:-'iV..-::V«V|
.•.•r.V'v:--- •••rc"-.-*-
••••'•*.'C''*:
HOLE PLUG
TD-26"
28 .
30.
32 .
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-7
Pag*
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
a.
LU a
— o".Q-,
10
83
— '. ••Ol'. -a
DESCRIPTION
ELEVATION AT TOP OF PVC CASINO: 42284
LOCKING WELL"
0-20* SILT AND CLAY. VERY DARK GRAY. SYR 3A DAMP,
MEDIUM TO HIGH PLASTICITY, ORGANIC OCCASIONAL
SAND AND GRAVEL
2AV4J0* SANDY GRAVEL GRAY. 5Y 5/1. WET AT 3".
CONCRETE '
SURFACE
PROTECTION
PAD
2* PVC CASINO
FLUSH COUPLED
(SCHEDULE 40)
4M0 CLAYEY GRAVEL GREENISH GRAY TO BLACK
5G 5/1 TO 25Y 2/0, SOME FINE GRAINED SAND.
GRAVEL IS SUB-ROUNDED TO ANGULAR
&0-&0* GRAVEL BLACK, 25Y 2/0. ROUND TO SUB-ROUND.
TRACE FINE GRAINED SAND AND CLAY.
803-100* SANDY GRAVEL UGHT OUVE GRAY, 5Y 8/2 SOME
CLAY. GRAVEL SUB-ROUNDED TO ROUNDED TO
15*.
12
14
SS S ssssss
s^ss!
1
16
100-120* SILTY CLAY. YELLOWISH BROWN TO OUVE GRAY,
10YR 5/4 TO 5Y 5/2 STIFF TO VERY STIFF.
MEDIUM TO HIGH PLASTICITY. PPEN = 125-15 TSF.
120-135*
135-VLO*
CLAY. MEDIUM TO HIGH PLASTICrFY. FIRM.
PPEN » 075-10 TSF.
SILTY SAND DARK GRAY. 5Y 4A UNIFORM,
FINE GRAINED. TRACE CLAY. 1^
VLO-iaxr SAND DARK GREENISH GRAY, SGY 4A
FINE GRAINED. UNIFORM, MICACEOUS,
OCCASIONAL THIN CLAY LENSES.
CAP rn] STEEL SURFACE
CASINO
BENTONITE
CEMENT OROUT
-7 — SWL » 18 ...v.' 2/5/91
y *••••
7 3/4
ORILLHOLE
18-30 MESH
SlUCA SANO
V.-'".
7. SCHEDULE 40
PVC SCREEN
(OjOlO* SLOT)
EarthFax
Engineering, Inc
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-8
Page
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
16
u
X DESCRIPTION
SAND (AS ABOVE).
18
20
«55|
II
22
s
18J3-224T SILTY CLAY. VERY DARK GRAY, 5Y 3/1.
SOFT, MEDIUM TO HIGH PLASTICrTY. THIN
FINE GRAINED SANO LENSE AT 200-210",
OCCASIONAL WOODY ORGANISMS.
PPEN < 025 TSF.
18-30 MESH
SlUCA SANO
••.•.•AS* PVC END CAP / vf*
• HOLE PLUG
TD-.22'
24
26
28
30
32
EarthFax
Engineering, Inc.
CHEVRON. USA
SALT LAKE REFINERY
MONITORING WELL
EF-8
Page
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
10
14 -os.-
=1 mm
mm.
m
DESCRIPTION
ELEVATION AT TOP OF SS. CASING: 42177
LOCKING WELL—
CAP
0-20* GRANULAR FILL
CONCRETE
SURFACE
PROTECTION
PAD
r. 318 STAINLESS
STEEL CASINO
20SJ7 SILTY CLAY. GRAY. 5Y 5/1. MEDIUM TO HIGH
PLASTICITY.
7 3/4*
DRILLHOLE
SkO-eXT CLAYEY SILT WTTH SAND. GRAY. 5Y 5/1
MEDIUM TO HIGH PLASnCrTY.
6.0-8L3' SANDY GRAVEL GRAY, SY 5/1 SOME SILT t. CLAY.
8.3-7.0* CLAY. BROWN. 10YR 5/3, STIFF, MEDIUM TO
HIGH PLASTICITY. PPEN = 15 TSF.
7.0-120* SILTY SAND. DARK GREENISH GRAY, 5GY 4/1,
UNIFORM, MICACEOUS, FINE GRAINED.
2*. 316 STAINLESS
STEEL SCREEN
(OJOW SLOT)
120-135" SAND. VERY FINE TO FINE GRAINED. UNIFORM.
MICACEOUS, DARK GREENISH GRAY. 5GY 4/1
135-U.0* SANDY GRAVEL DARK GREENISH GRAY, 5QY 4/1
UNIFORM. MICACEOUS. GRAVEL ROUNDED TO
3/4', SAND IS VERY FINE TO FINE GRAINED.
140-18.0* SAND. VERY FINE TO FINE GRAINED. UNIFORM.
MICACEOUS. DARK GREENISH GRAY, 5GY 4/1
LT=D „ STEEL SURFACE
CASINO
wm 7 \ BENTONITE
CEMENT OROUT
V SWL = 18
- 2/5/91
i
•"iv'O.:;.;: 557
1 •V
16-30 MESH
. SlUCA SAND
3
3$
V.v-.-f
.••v.
••S>":
ft
ii
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-9
Page
1
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
GEOLOGIC LOG COMPLETION DETAILS
E
Ul
5
0. Ui
a
16 .
o DESCRIPTION
SAND (AS ABOVE!
STAINLESS
STEEL END CAP
18
180-200* SILTY CLAY. OUVE GRAY. 5Y 4/2, VERY SOFT
ANO STICKY. MEDIUM TO HIGH PLASTICITY,
PPEN <026 TSF.
18-30 MESH
SILICA SAND
20 TDr20*
22.
24
26
28
30
32
EarthFax
Engineering, Inc.
CHEVRON, USA
SALT LAKE REFINERY
MONITORING WELL
EF-9
Page
2
of
2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Prelect Name: LANDFARM MONITOR WELLS
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number: LFM-1
Boring/Well locotion: N11222.99 E11527.58
Project Number UC-345-22 Reference Elevation (ft): 4222.07
Reference Point: TOP OF PVC
Date Drilled: 10-31-94
logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor: SHAPIRO'S DRILLING SERVICE
Prilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Static W.L (It): 3.61
Oate Measured: 12-8-94
Boring Depth (II): 18
Boring Diameter (In): 8
Well Depth (II): 17
1-
2-
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
18-
3 STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
3' TOP SOIL
3-6' SILTY SAND:.
Soma rounded 1/4* stones. Approximately 75%
medium-grained sand. Yellowish brown 10YR 5/4.
\
6 - 6.5* SAND:
Fine-grained, micaceous. Olive gray 5Y 5/2
grading to dark greenish gray SGY 4/1 with black
streaks.
6.5 - 8.5' SILTY SANO:
Approximately 60% fine-grained micaceous sand,
medium stiff. Petroleum odor. Dark greenish gray
5G 4/1.
8.5 - 13.5' SAND:
Fine— to medium-grained, micaceous.
11-12' grades finer with trace silt. Dark greenish
gray SGY 4/1.
13.5 - 18' SAND:
Fine grained, micaceous. Thin silt beds near IS'
at 45—degrees to horizontal. Dark gray 5Y 4/1.
WELL COMPLETION DETAILS
-Protective Steel Casing
, Concrete Pad
•if— 0 - 0.5' Concrete
0.5 - 1' Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
-f-1 - 18' 16/40-Mesh Silica Sond
-1.5 - 16.5'
2 " PVC 10-Slot Screen. Sch 40
-Threaded End Cap
TD = 18.0'
EarttFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Protect Name: LANDFARM MONITOR WELLS
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number LFM-2
Boring/Well Location: N11054.12 El 1809.21
Prefect Number: UC-345-22
Reference Elevation (ft): 4225.15
Reference Point: TOP OF PVC
Date Drilled: 10-31-94
Logged Bp AM
Sample Method: 2' SPLIT SPOON
EVERY 5*
Drilling Conlracton SHAPIRO'S DRILLING SERVICE
Orilling Method: HOLLOW-STEM AUGER Kg Type. CME-55
Static W.L (II): 5.32
Date Meejured: 12-8-94
Boring Depth (II): 18
Boring Diameter (in): 8
Well Deplh (tl): 17.5
10--
11-
12-
13-
14-
15-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-3' TOP SOIL (BERM)
3-5' CLAY:
Medium- to high-plasticity. Medium stiff.
Dark brown 10YR 3/3-
5 - 8.5' SILTY CLAY:
With approximately 307C fine—grained micaceous
sand. Medium to high plasticity. Light olive gray
5GY 5/1 grading to greenish gray 5GY 5/1 with
increasing black spotting. Strong petroleum odor.
8.5 - 13.5' SANDY SILT:
Approximately 30% fine-grained micaceous sand.
Medium stiff. Brown 10YR 5/3 grading to dark gray
5Y 4/1. Strong petroleum odor.
13.5 - 18' SAND:
Trace silt. Sand is fine—grained, micaceous.
Soft texture. Dark gray 5Y 4/1.
WELL COMPLETION DETAILS
—Protective Steel Casing
Concrete Pad
•0 - 0.5' Concrete
-O.S — V Granular Bentonite
-0 - 2'
2 " Flush Thread PVC Casing, Sch 40
•1 - 18' 16/40-Mesh Silica Sand
•2 - 17'
2 " PVC 10-Slot Screen, Sch 40
•Threaded End Cap
TD = 18'
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Protect Nome: LANDFARM MONITOR WELLS
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number. LFM-3
Boring/Well Location: Nl 1037.93 El 1564.36
Project Number: UC-345-22 Reference Elevation (ft): 4221.56
Reference Point: TOP OF PVC COLLAR
Date Drilled: 11-1-94
Legged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Sialic W.L (ft): 3.22
Date Measured: 12-1-94
Boring Depth (ft): 18.5
Boring Diameter (in): 10
Well Depth (fl): 16
I-
6-
7-
8-
9-
10-
11-
12-;
13-
14-
15-
16-
17-
18-
18.5
, if jj.
* *}.
PS, 4
* rt v
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
2' GRAVELLY TOP SOIL
2-5' SANDY CLAY:
Sand Is fin* grained. High plasticity.
Dark brown 10YR 4/3.
Moist.
5 - 6.5' SJLTY SANO:
Some 1/4 stones. Approximately 7074 fine grained
sand. Pale brown grading to light brownish gray
10YR 6/3 to 6/2.
5.5' S
Some 1/8" stones. Fine grained, micaceous.
Dark greenish gray 5BG 4/1. Petroleum odor.
8.5 - 10.5' SANDY SILT:
Some clay with rounded stones to 1/4 .
Medium stiff, moderate plasticity. Gray 5Y 5/1.
\
10.5 - 11.3' SILTY SAND:
Some rounded stones to 1/4". Approximately 85%
fine grained, micaceous sand. Dork greenish gray
5G 4/1.
11.3 - 13.5' SANDY SILT:
Approximately 10% fine grained.
Soft. Greenish gray 5G 5/1.
micaceous sand.
13.5 - 18' SILT:
Trace fine grained, micaceous sand. Occasional
thin sandy parting. Dark greenish gray SGY 4/1.
Petroleum odor.
WELL COMPLETION DETAILS
-Protective Steel Casing
^Concrete Pad
1 - 18.5* 16/40-Mesh Silica Sand
-0 - 0.5' Concrete
-0.5 - 1* Granular Bentonite
-0 - 1.5" 4" 316 Stainless-Steel Casing
-1.5 - 15* 4" 10-Slot Wire-Wound
316 Stainless—Steel Screen
TD = 16'
•Welded Bottom Plate
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
EARTHFAX ENGINEERING, INC.
Project Nome: LANDFARM MONITOR WELLS
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Soring/Well Number. LFM-4
Boring/Well Loeoflon: Nl 1746.42 El2081.67
Prelect Number: UC-345-22 Reference Elevation (ft): 4226.86
Reference Point: TOP OF PVC
Oate Drilled: 11-2-94
Logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor: SHAPIRO'S DRILLING SERVICE
Prilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Static Wi* (tl):
Dote Meosured:
2.32
11-30-94
Boring Depth (fl): 18.5
Boring Diameter (in): 8
Well Depth (ft): 17.0
2-
3-
4-
6-
7-
8-
9-i
10-
11-
12-
13-
14-f
15-
16-
17-
18-
18.5
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0 - 5':
TOP SOIL AND PEAT. Becomes sandy with fine gravel
at 4'. Wet at 2-3'.
5 - 8.5' SAND:
Medium to coarse grained. Some rounded gravel to
1/4". Olive gray SY 5/2.
8.5 - 11.5' GRAVELLY SILT:
With gravel partings up to 1". Gravel is fine
grained to 1/4". Sub-rounded. Silt is soft and
sticky. Dark grayish brown 2.5Y 4/2.
11.5 - 13.5' SILT:
Soft and sticky. Dark grayish brown 2.5Y 4/2.
13.5 - 18.5' SAND:
Flowed Into augers. Ranges from medium to coarse
grained. Coarse grains are angular.
Olive gray to salt and pepper color.
WELL COMPLETION DETAILS
—Protective Steel Casing
Concrete Pad
"H-0 - 0.5' Concrete
0.5 - 1' Granular Bentonite
1.5'
Flush Thread PVC Casing, Sch 40
1 - 18.5* 16/40-Mesh Silica Sand
-1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
'Threaded End Cap
TD = 18.5'
:<2
Eartrftx
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Project Nome: TEL WEATHERING AREA
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Borlnj/Well Number TEL—1
Boring/Well LocoHon: N10127.22 E10100.31
Project Number UC-345-21
Reference Elevation (ft): 4217.73
Reference Point: TOP OF PVC
Date Drilled: 10-28-94
Logged 8y: AM
Sample Method: 2' SPUT SPOON
EVERY 5'
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Sialic W.L (tl): 3.36
Date Measured: 12-1-94
Boring Oeplh (II): 17
Boring Diameter (in): 8
WeU Depth (fl): 17
1-
2-
3-
6-
7-
8-
9-
10-
11-
12-
13-
15--
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0 - 0.5' TOP SOIL.
0.5 - 5' SILTY SAND:
Some 1/4' grovel In upper 2'. Approximately
fine-groined sand. Soft and sticky. Wet af 2 ,
Olive gray 5Y 5/2.
60%
5 - 8.5' SANDY SILT:
Trace clay, thin sand lenses throughout.
Approximately 10% fine grained micaceous sand.
Low plasticity. Slightly mottled olive gray
8.5 - 10.3* SAND:
Fine grained, uniform. Dork greenish gray
5G 4/1.
10.3 - 13.5' SILT:
Some fine-grained sond. Soft and sticky.
Dark greenish gray 5G 4/1.
13.5 - 17' CLAYEY SILT:
Low plasticity. Soft and sticky. Predominantly
black with some gray patches.
WELL COMPLETION DETAILS
— Protective Steel Casing
Concrete Pad
v —o - 0.5' Concrete
-0.5 - 1' Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
--1 - 17' 16/40-Mesh Silica Sand
-1.5 - 16.5'
2 " PVC 10-Slol Screen. Sch 40
TD = 17.0'
•Threaded End Cop
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Pro|ecl Nome: TEL WEATHERING AREA
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number TEL-2
Boring/Well LocoKon: N10144.82 E9681.64
Prelect Number. UC-345-21 Reference Elevation (ft): 4217.16
Reference Point: TOP OF PVC
Oate Drilled: 10-31-94
Logged By: AM
Sample Method: 2' SPUT SPOON
EVERY 5"
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-S5
Static W.L (fl): 5.22
Date Measured: 11 -30-94
Boring Depth (fl): 18
Boring Diameter (in): 8
Depth (II): 17
1-
4-
5-
6-
8-
9-
10-
11-
12-
13-
15-
16-
17-
18-
<5
X a.
s
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
r TOP SOIL
2 - 5.5' CLAYEY SILT:
Some fine groined micaceous sand. Medium to high
plasticity. Very dark brown 10YR 2/2.
5.5 - 8.5' SANOY SILT:
Trace clay. Approximately 1071 fine grained
micaceous sand. Low plasticity. Medium stiff.
Greenish gray SGY 5/1.
8.5 - 13.5* SILT:
Some fine grained sand. Trace clay. Soft and
sticky. Greenish gray 5GY 4/1.
13.5 - 18' SAND:
Fine grained, micaceous. Loose.
Dark greenish gray 5CY 5/1.
WELL COMPLETION DETAILS
— Protective Steel Casing
Concrete Pad
0 - 1' Concrete
-0.5 - 1' Granular Bentonite
•0 - 1.5*
2 " Flush Thread PVC Casing, Sch 40
•1 - 18' 16/40-Mesh Silica Sand
•1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
"^Threaded End Cap
TD = 18.0'
EartrtFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Project Nome: TEL WEATHERING AREA
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number TEL-3
Boring/Well location: N10271.32 E9609.74
Project Number: UC-345-21 Reference Elevation (fl): 4219.27
Reference Point: TOP OF PVC
Date Orllled: 10-31-94
logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor: SHAPIRO'S DRILLING SERVICE
DrPltng Method: HOLLOW—STEM AUGER Rig Type: CME-55
Static W.L (ft): 8.19
Date Measured: 11 -30-94
Boring Depth (ft): 18
Boring Diameter (In): 8
Well Depth (ft): 17.5
4-
6-
7-
8-
10-
11-
12-
13-
14-
15-
16-
17-
18-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-2" TOP SOIL
2-5' SANDY CLAY:
Approximately 30% fine-grained micaceous sand.
High plasticity. Moist. Grayish brown 10YR 5/2.
5 - 8.5' SILTY SAND:
Approximately 70% fine-grained micaceous sand.
Brown 10YR 5/3.
8.5 - 13.5' CLAYEY SILT:
Some fine-grained micaceous sand lenses at 10 and
12'. Soft and sticky. Greenish gray SGY 5/1.
13.5 - 18' SAND:
Fine grained, micaceous. Uniform.
Dark greenish gray SGY 4/1.
'AT.
WELL COMPLETION DETAILS
— Protective Steel Casing
/Concrete Pad
•4—0 - 0.5' Concrete
0.5 - 1' Granular Bentonite
-0 - 2'
2 " Flush Thread PVC Casing, Sch 40
• 1 - 18" 16/40-Mesh Silica Sand
-2 - 17'
2 " PVC 10-Slot Screen. Sch 40
•TD = 18"
•Threaded End Cop • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Project Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-t
Boring/Well location: N10817.05 E9046.80
Project Number. UC-345-18
Reference Elevation (fl): 4213.80
Reference Point: TOP OF PVC
Dale OrMed: 10-25-94
logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5"
Drilling Contractor: SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Static W.L (ft): 4.90
Date Measured: 1 1 -23-94
Boring Depth (fl): 17
Baring Diameter (in): 8
Well Depth (ft): 17
2-
3-
4-
8-
9-
10-
11—
12-
13-
14-
15-
16-
17-
Ay / / ' / /, , / / /
"I,
'///, '///, ,
//>>
'/> t //// //// // / /
// / / //// /// '//, VV"
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0.5' TOP SOIL
0.5 - 5' SILT:
Soma fins-groined sand. Soft and sticky. Wet.
Light olive gray 5Y 6/2.
5 - 8.5' SILTY CLAY:
Some fine sand from 5-6'. High
Soft. Dark greenish gray 5G8 4/1.
8.5 - 13.5' SILT:
Trace fine—grained sand. Very soft and sticky.
Greenish groy 5GY 5/1.
13.5 - 16' SAND:
Fine— to medium—grained, micaceous.
Greenish gray 5GY 5/1.
16 - 17' SILT:
Very soft and sticky. Black 7.5YR 2/0.
WELL COMPLETION DETAILS
II :::.'rr-1 - 17' 16/40-Mesh Silica Sand
— Protective Steel Casing
Concrete Pad
•T- 0 - 0.5' Concrete
0.5 — 1' Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
-1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
•TO = 17.0'
•Threaded End Cop • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Protect Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-2
Boring/Well Locotlon: N10484.69 E9313.24
Protect Number UC-345-18 Reference Elevation (ft): 4216.70
Reference Point: TOP OF PVC
Date Drilled: 10-25-94
Logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5*
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW—STEM AUGER Rig Type: CME—55
Static W.L (ft):
Date Measured:
7.34
11-23-94
Baring Oepth (fl): 17
Baring Diameter (In): 8
Well Depth (ft): 17
1-
2-
3
warn
///
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-3'
TOP SOIL. Sondy. Dark grayish brown 10YR 4/2.
3-5" SILTY CLAY:
Some fine sand. High plasticity. Moist; soft.
Brown 10YR 5/3.
5 - 8.5' SILT:
Sandy intervals. Moderately soft; sticky. Sand is
fine grained; micaceous. Moist. Light olive gray.
5Y 6/2.
8.5 - 13.5'
SILT. Trace fine micaceous sand. Slightly blocky
and firmer 11-12". Dark greenish gray 5G 4/1.
Strong hydrogen sulfide odor.
13.5 - 17' SILT:
Very soft. Occasional sandy parting. Dark greenish
gray 5GY 4/1.
WELL COMPLETION DETAILS
— Protective Steel Casing
Concrete Pad
4-0 - 0.5' Concrete
0.5 - 1' Granular Bentonite
1.5*
2 " Flush Thread PVC Casing, Sch 40
-1 - 17' 16/40-Mesh Silica Sand
•1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
TD = 17.0*
^Threaded End Cap
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Protect Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number: WFP-3
Boring/Well Location: N10091.76 E9204.53
Project Number UC-345-18 Reference Elevation (fl): 4214.94
Reference Point: TOP OF PVC
Oate Drilled: 10-26-94
Legged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW—STEM AUGER Rig Type: CME-55
Stotle V/.L (It): 7
Date Meaeured: 1
.05
1-23-94
Boring Depth (fl): 17
Boring Diomeler (in): 8
Well Depth (ft): 17
6-
7-
8-
9-^
10-
11-
12-
13-
14-
15-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0 - V TOP SOIL
CLAYEY SANO
1 - 5' SANDY CLAY:
Approximately 407J fine grained micaceous sand.
Medium plasticity. Light grayish brown. 10YR 6/2.
5-10' SILTY SAND:
Some clay. Approximately 60% fine grained
micaceous sand. Medium plasticity. Sticky.
Pale olive. 5Y 6/3.
10 - 17' SILT:
Trace cloy and fine grained sand. Very soft and
sticky. Low plasticity. Dark greenish gray.
5BG 4/1.
WELL COMPLETION DETAILS
—Protective Steel Casing
Concrete Pad
|| - - — i — 17' 16/40-Mesh Silica Sand
*—0 - 0.5' Concrete
J—0.5 - 1' Granular Bentohite
—0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
-1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
TD = 17.0'
'Threaded End Cap • m
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
EARTHFAX ENGINEERING, INC.
f>ro|«Gt Nome: WEST FIELD PLUME
Owner/Clhml: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number: WFP-4
Boring/Well Loortton: N10650.71 ES747.16
Project Number UC-345-18 Reference Elevation (ft): 4214.06
Reference Point: TOP OF PVC
Dote Drilled: 10-26-94
Logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Stotlc W.L (II): 5.80
Dote Meaeuned: 11-29-94
Boring Depth (ft): 17
Bering Diameter (in): 8
Well Depth (ft): 17
1—
6-
9-
10-
11-
12-
13-
14-
15-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0.5" SANDY TOP SOIL
0.5 - 5' SANDY CLAY:
Approximately 40% fine micaceous sand.
High plasticity. Moist. Olive gray 5Y 5/2.
5-10' CLAYEY SILT:
Some sand and thin silty sand lenses. Soft; sticky.
Low plasticity. Approximately 30% fine micaceous
sand. Pale olive SY 6/3, slightly mottled.
8ecomes dark greenish gray near 7*.
10 - 10.5' SILTY SAND:
^ Approximately 60% fine-grained sand.
10.5 - 13.5' SILT:
Trace fine-grained sand and clay.
Dark greenish gray 5G 4/1.
13.5 - 16.7' SANDY SILT:
Approximately 30% fine-grained sand. Very soft
and sticky.
16.7 - 17' SAND:
Fine grained; micaceous. Dark greenish gray.
5G 4/1. (Stuff in top of 15-17' sample is also
fine-grained micaceous sand).
WELL COMPLETION DETAILS
— Protective Steel Casing
Concrete Pad
•4-0 - 0.5' Concrete
0.5 - 1" Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
^f-1 - 17' 16/40-Mesh Silica Sand
•1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
•TD = 17.0'
•Threaded End Cap
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Project Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-S
Boring/Well Locetion: N 10543.84 E8963.9I
Projecl Number. UC-345-18 Reference Elevation (fl): 4214.34
Reference Point: TOP OF PVC
Date Drilled: 10-26-94
Logged Br: AM
Sample Meihod: 2" SPLIT SPOON
EVERY 5'
Drilling Contractor: SHAPIRO'S DRILLING SERVICE
Drilling Meihod: HOLLOW-STEM AUGER Rig Type: CME-55
Static W.L (ft): 7.62
Date Meanred: 11 -29-94
Boring Depth (ft): 18
Boring Diameter (in): 8
Well Depth (ft): 17
1-,
2-
3-
4-
6-
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
18-
3
X
a.
s
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0.5' SANDY TOP SOIL
0.5 - 5' SANDY CLAY:
Approximately 40% fin* micaceous sand.
High plasticity. Wet at 4'. Pale Olive 5Y 6/3.
5 - 8.5' SANOY SILT:
Trace clay. Approximately 20% fine micaceous sand.
Very soft, sticky. Some roots throughout.
Low plasticity. Olive gray SY 5/2.
8.5 - 10.8' SAND:
Fine grained. Hydrogen sulfide odor.
Greenish gray 5GY 5/1.
10.8 - 15' SILT:
Very soft and sticky. Greenish gray 5GY 5/1.
15 - 18' SAND:
Fine grained, micaceous. Dark greenish gray.
5G 4/1.
'2
WELL COMPLETION DETAILS
Protective Steel Cosing
Concrete Pad
•4—0 - 0.5' Concrete
0.5 - 1' Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
4-1-18' 16/40-Mesh Silica Sand
•1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
Threaded End Cap
TD = 18.0" • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Prelect Nome: WEST FIELD PLUME
Ouner/CUent: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number: WFP-6
Boring/Well Location: N10303.43 E8139.19
Pro|ect Number. UC-345-18 Reference deration (ft): 4214.38
Reference Point: TOP OF PVC
Oate Drilled: 10-26-94
Logged Br: AM
Sample Method: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor. SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Static W.L (fl): 12.27
Date Measured: 11-22-94
Boring Depth (ft): 17
Boring Diameter (In): 8
Well Depth (ft): 17
> <•
> /
6-
7-
8-
9-
10-
11-
12-
13-
14-
15-
16-
17-
§
s
X
a.
s
'A
A / / / /
A
'A
A
/* > *
A
A
h
* >
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0.5* TOP SOIL
0.5 - 5' SILTY CLAY:
Some fine—grained micaceous sand. Medium to
plasticity. Damp. Light olive gray 5Y 6/2.
high
5 - 8.5' SANDY SILT:
Approximately 20-40% fine grained sand (increasing
with depth). Soft; sticky. Wet. Olive gray
10YR 5/2.
8.5 - 13.5' SILT:
Very soft and sticky. Gray 5Y 5/1.
13.5 - 17' SILT:
Trace fine-grained sand with depth. Very soft
and sticky. Dark greenish gray with black
streaking near 17' 5G8 4/1.
24 ir
WELL COMPLETION DETAILS
—Protective Steel Cosing
Concrete Pad
-0 - 0.5' Concrete
-0.5 - V Granular Bentonite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
-1 - 17' 16/40-Mesh Silica Sand
-1.5 - 16.5*
2 " PVC 10-Slot Screen, Sch 40
TD = 17.0'
Threaded End Cap • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC.
Project Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-7
Boring/Well Locution: N9820.87 £8312.02
Project Number. UC-345-18 Reference Elevation (ft): 4214.52
Reference Point: TOP OF PVC
Date Drilled: 10-27-94
Logged By. AM
Sample Meihod: 2' SPLIT SPOON
EVERY 5'
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Orilllng Method: HOLLOW-STEM AUGER Rig Type: CME-55
Stotlc W.L (fl): 1 1.33
Date Meaeured: 11-22-94
Boring Depth (ft): 18
Boring Oiameter (in): 8
Well Depth (ft): 17
11-
12-
13-
14-
15-
17-
18-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-1' TOP SOIL
1 - 5' SANDY CLAY:
Approximately 40/5 fine-grained sand. Medium fo
high plasticity- Very moist. Pale brown 10YR 6/3.
5 - 8.5' SILTY CLAY:
Some fine-grained micaceous sand.
Sticky. Pale olive 5Y 6/3.
High plasticity.
8.5 - 13.5' CLAYEY SILT:
Trace fine—grained micaceous sand. Low plasticity.
Soft and sticky. Dark greenish gray 5G 4/1.
13.5 - 16' SANDY SILT:
Approximately 10% fine-grained micaceous sand.
Very soft and sticky.
16-18'
Alternating SAND (fine grained, micaceous) and
CLAYEY SILT (with 20% fine-grained sand. Soft,
sticky, low plasticity) in 2-inch layers.
Dark greenish gray 5G 4/1.
i | 1-18' 16/40-Mesh Silica Sand
WELL COMPLETION DETAILS
-Protective Steel Cosing
.Concrete Pad
-0 - 0.5' Concrete
-0.5 - 1' Granular Bentortite
-0 - 1.5'
2 " Flush Thread PVC Casing, Sch 40
1.5 - 16.5'
2 " PVC 10-Slot Screen. Sch 40
-Threaded End Cap
•TD = 18.0' • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Project Nome: WEST FIELD PLUME
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-8
Boring/Well Location: N9535.51 E8721.55
Project Number UC-345-18 Reference Elevation (ft): 4213.52
Reference Point: TOP OF PVC
Date Drilled: 10-27-94
Logged By: AM
Sample Method: 2' SPLIT SPOON
EVERY 5"
Drilling Contractor SHAPIRO'S DRILLING SERVICE
Drilling Method: HOLLOW-STEM AUGER Rig Type: CME-55
Static W.L (ft):
Date Measured:
7.33'
11-22-94
Boring Depth (ft): 17
Boring Diameter (In): 8
Well Depth (ft): 17
3-
6~,
7-
8-
9-..U
io- r.
12-
13-
14-
16-
17-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-1' TOP SOIL
1 - 5' SILTY CLAY:
Some fine-grained micaceous sand. High plasticity.
Very moist at 2.5*. Pale olive 5Y 6/3.
7,
5 - 8w5' SANDY CLAY:
Approximately 20% fine-grained micaceous sand.
High plasticity. Some roots. Pale olive 5Y 6/3. ^
Slightly mottled.
8.5 - 10.5' SANDY SILT:
Approximately 20% fine grained sand.
10.5 - 13.5' CLAYEY SILT:
Low plasticity. Sticky. Dark greenish gray 5G 4/1.
13.5 - 17' SILT:
Trace clay. Occasional thin, micaceous, fine
grained sand lense. Greenish gray to 16' 5G 5/1.
Black from 16-17'.
WELL COMPLETION DETAILS
— Protective Steel Casing
Concrete Pad
- 0 — 0.5' Concrete
-0.5 - V Granular Bentonite
0 - 1.5'
2 " Flush Thread PVC Cosing, Sch 40
1 - 17" 16/40-Mesh Silica Sand
-1.5 - 16.5'
2 " PVC 10-Slot Screen, Sch 40
-T.D. = 17'
Threaded End Cap
EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC.
Project Nome: Chevron Well Replacement
Owner/Client: CHEVRON U.S.A. PRODUCTS CO. SALT LAKE REFINERY
Boring/Well Number WFP-9A
Boring/Well Location: N 11297.31 E 9692.53
Project Number UC-499-02 Reference Elevation (ft): 4217.29
Reference Point: TOP OF CASING
Dote Drilled: 12-06-95
Logged By: KHB Sample Method: SPLIT—SPOON
Drilling Contractor DOUG BEDKE
Drilling Meihod: HOLLOW-STEM AUGER Rig Type: CME 750
First Occurrence
Dote Measured:
ol G.W. (ft): 9
12-13-95
Static W.L (ft): 4.03 Boring Oepth (ft): 22
Boring Dlometer (In): 8 5/8
Well Depth (ft): 19.8
2-
6-
12-
14-
16-
18-
20-
22-
STRATIGRAPHIC DESCRIPTION
AND OBSERVATIONS
0-3' ROAO BASE OR GRANULAR FILL:
Fill material consists of coarse gravel and sand.
3 - 6.5* CLAYEY SILT:
Approximately 60% silt and 30% clay with a minor
amount of fine grained sand. Intermittent sand
layers up 1/2-inch thick. Moist. Some iron stains
No reaction to HCL. Light Olive Gray 5Y 6/2.
6.5 - 10.9' SILTY CLAY:
Color change from Light Olive Gray to White.
No reaction to HCL. Saturated at approximately
9 ft. Moderate plasticity Intermittent fine to med
grained sand layers from 11.5 ft. to 12 ft.
10.9 - 15.7' SAND:
Sand is fine to medium grained, SA - SR, and
is comprised predominantly quartz with mica flakes.
Saturated. Minor iron streaking. SY 5/1. Gray.
15.7 - 20' CLAYEY SILT:
Approximately 75% silt and 15% clav.
fine grained sand layers. Saturated,
reaction to HCL. Gray. 5Y 5/1.
Occasional
Moderate
WELL COMPLETION DETAILS
-Flush-Mounted Cover
VS'
I
-0 - 1'
Neat Cement
•1-4'
Bentonite Pellets
- 5'
Flush Thread PVC Casing, Sch 40
•4-20*
10/20-Mesh Silica Sand
20'
PVC 10-Slot Screen, Sch 40
20 - 20.5' SAND:
Sand as above. Gray. SY 5/1.
20.5 - 22'
As above.
CLAYEY SILT:
Gray. 5Y 5/1.
-TD = 20'
^Threaded End Cap
NATURAL FILL • • EarthFax
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING. INC. HYDROGEOLOGIC LOG PAGE i OF
Projoet No**: CHEVRON GROUND UATER rrOOEL
Owner/CI lent: OCVRON U.S.A.. SALT LAKE CITY. UTAH
Boring/UslI Nuaber: 0-1-00
BorinoyUall Locotiorv T7*T5.97 N 10. 237.28 E
Project Nu«oer= UC-17S-15-01
Reference devotion: 1211.18'
Reference Point: TOP OF PVC CASINO
Date OriI led:
Logged by:
9-12 DEC 1991
JRP
Ori11ing Contractor: ADVANCED AUGER INC.
Prilling Method: H. STEM AUGER Rig Typp:
First occurrence of G.U.
Ootee Meosured:
2' Static UL.
9 DEC 1991
FLOWING Boring Oepth (rt): 91'
Boring Oioweter I in) - 10 1/1"
Wall Oapth (Ft): 90'
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
OETAILS
GRAVEL:
10-
30—
-.///
:///
-///
-_///
.///
70-
90— ;
100-
rounded.
1- clasts. Angulc
(10 YR S /l?ra'' Saturated. Gray
SILTY CLAY: Soturoted. Dork gray (10 YR 1/1)
aubunite of Fine grained sand at >
depth*.
Thin
SILTY SANO: nediua to very Fine grained. Gray, block.
and white colored sand grains in gray silt
(10 YR 5/11.
. Cement
. Benton i ta Grout
.2* PVC Cosing, Schedule 10
. 20-10 Mesh S i I i co Send
.2" Schedule 10 PVC
0.010' Slot Screen
.Threaded End PIug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 1 OF
Project Nome' BCVRON GfVJUNO UATER tTOOEL
Owner/Client: CHEVRON U.8.A.. SALT LAKE CITY. UTAH
Boring/Uell Number' 0-3-OOn
Borlng/Usl I Locotion: 9966.06 N 12. 713 E
Pre j set Number< UC-17S-15-01 Reference Elevation: 1221.81'
Reference Point* TOP OF PVC CASINO
Oote Ori I led:
Logged by:
8 OCT 1991 Ori 11 inn. Contractor: ZPtErJIAN UELL 8ERVICE8
Pri 11 ing northed: CABLE TOOL Rig Type:
Firet occurrence of G.U.: —
Ootee fleoeured: —
Static U.L.: FLOWING
11 OCT 91
Boring Depth (rt): 87' UelI Depth (ft): 82.5'
Boring Oiometer I in): 8 1/1*
J4I
LO—
20-:
30-
SO—
6C—
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
SILTY CLAY: High plasticity. Trace of mediua grained
sand. Very dark gray (10 YR 3/1).
SANOY SILT: Interbedded I oyer* ef soft clay,
fin* grained, aicaceous.
Sand ie
Less sand. Grayish brown (2.5 Y 5/2).
SILTY SAND' Sand is fine to medium grained,
coarse grained sand.
Trace of
SANO: Ned ium to coarse grained
Trace of fine grained
1/8". Gray (5 Y S/l)
flic
and gravel up to
Sand is f ino grained. Some silt and f ina
gravel.
Sand is fine to coarse grained. Trace af
eilt and Tine quartz gravel up to 1/1".
Increoaing grave I with depth.
70—
80—
SANOY GRAVEL' Sand is medium to coarse groined. Gravel ie
quartz, angular. ApproxiaateIy TOX Band.
302 grave I.
Sand is fine to coarse grained. Al I elee
ae above.
Some silt. Sand is f ine to
predominantly fine grained,
rounded.
gra i ned.
lis
CLAYEY SILT: Some Fine to medium grained sand. Oark gray
I7.S YR 1/0).
UELL COMPLETION
DETAILS
. Neat Cement
.2" PVC Cosing, Schedule 10
. Benton i te Grout
.2" Schedule 10 PVC
0.010" Slot Screen
.20-10 Mesh Silico Sand
100-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 1 OF
Proj oet
Owner/CI ietvt =
CHEVRON GROUND UATER nOOEL
CHEVRON U.S.A.. SALT LAKE CITY. UTAH
Boring/Uell Number: 0-S*OOB
Boring/Hoi I Locotion: 9932.H N t? 697 65 E
Projoert Nuabor> UC-1T5-1S-01 Reference Elavotion: 1222.4*
Reference Point' TOP OF PVC CASING
Oerte Ori I led:
Logged by:
25-28 NOV 1991
JRP
Ori 11 ing Contractor: ZIrfCRtlAN UELL SERVICES
Ori 11 ing flothod: CABLE TOOL Rig Type:
First occurrence of G.U.
Ootes Measured:
opp. 3' Stotic U.L.:
25 NOV t 10 DEC 91
FL0UIN6 Boring Depth trt) • 90*
Boring Oiometer I in): 9 1/1"
Uell Depth (ft): 85'
10—:
20—
60—
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
B0UL0ERS-SAN0: Gravely sand matrix. Sand ia very Tine to
mediua groined, poorly sorted. Very dark
brown (7.S YR N 2/2).
SANOY SILT: Soft. Very fine grained. Dark brown
(7.5 YR 3/21, changing to gray (10 YR 5/1)
at about 20 Feat.
GRAVELY SANO: Alternating with sand and thin interbeds of
silty sand. Very fine to very coarse grain
sizes, up to 0.75 cm. Quartz, carbonate, and
mica eand. Flowing sand. Reacts with HCI.
Graino colored block and white.
SILTY CLAY: Artesian flow. Groy (10 YR 5/1).
100-
UELL COMPLETION
DETAILS
.Cement
. Benton i te Grout
.2* PVC Casing, Schedule 10
.2" Schedule 10 PVC
0.010" Slot Screen
.20-10 Mesh Silica Sand
.Threaded End Plug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PACE 1 OF i
Proj ect
Owner/CIient:
CHEVRON GROUND. UATER nOOEL
CHEVRON U.S.A., SALT LAKE CITY, UTAH
Bcrlng/Uall Numbar: D-S-OOC
Borlno/Wel I Locotion: 9932.21 N 12. 702.26 E
Project Number' UC-175-15-01 Reference Elevation: 5221.29'
Reference Point: TOP OF PVC CASING
Oote DriI led:
Logged by:
25-28 NOV 1991
JRP
Ori 11 ing Contractor: ZITTCRTMN UELL 8ERVICES
Ori 11 ing Method: CABLE TOOL Rig Type:
Firet occurrence af 6.U.:
Ootee Measured:
app. 3' Static U.L.:
25 NOV t 10 OEC 91
FLOWING Baring Depth (rt): 90'
Boring Oiometer (in):
Uell Depth (ft): 8S'
8 1/1"
10—
20—
30—
SO—
SO-
TO—
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
BOULDERS-SAND. Gravely eond matrix,
mediua < ' '
. brown ['
gra i ned. poor I y
(7,5 YR N 2/2).
Sand i
sorted.
very fine to
Very dark
SANOY SILT• Soft. Very Tine grained. Dark
(7.S YR 3/2). changing to gray (10 YR 5/1)
at about 20 Feet.
GRAVELY SANO' Alternating with sand and thin interbeds of
silty sand. Very fins to very coarse grain
sizes, up to 0.75 cn. Quartz, carbonate, and
mica eond. Flowing sand. Reacts with HCI.
Grains colored black and white.
90 y SILTY CLAY: Artesian flow. Gray (10 YR 5/1).
100-
1
1 ). i 1
1
1
UELL COMPLETION
DETAILS
Cament
Bentonite Grout
.2* PVC Cosing, Schedule 10
.2" Schedule 10 PVC
0.010" Slot Screen
. 20-10 Mesh S iIi co Sand
. Threaded End Plug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 1 OF
Project Nose:
Owner/CIient:
CHEVRON 6R0UN0 UATER IIOOEL
CHEVRON U.S.A.. SALT LAKE CTTT. UTAH
Boring/Uell teuaber: 0-35
Boring/Uel I Locotion: BOH.97 N 7995.52 E
Project Number> UC-175-1S-01 Reference Elevotien: 5213.53'
Reference Point: TOP OF PVC CASING
Oate OriI led:
Logged by--
16-20 DEC 1991
JRP
Ori 11 ing Contractor: ZXrtCRTIAN UELL SERVICES
Ori 11 ing Method: CABLE TOOL Rig Type:
Firet occurrence of G.U.
Dotes Meosursd:
app. 5' Stotic U.L.
16 X 23 DEC 91
5217.85'
ARTESIAN
Boring Depth (ft): 115'
Boring Oiometer (in): B 1/5"
welI Depth (ft): 115'
10—
20—
SO-
TO—
100-
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
SANOY SILT: fine grained. Organic matter in upper portion.
Moist Reaets with HCI. Brawn (10 YR 5/3).
SILTY CLAY: Saturated. Gray (10 YR 5/1).
Occae i ona I eond I eneee.
SANDY SILT- Fine to very fine grained.
(LOG CONT. ON FOLLOWING PAGE I
UELL COMPLETION
DETAILS
.Benton i te Grout
.2" PVC Cosing, Schedule 50
. 20-50 risen S11 i co Sand
(UELL CONT. ON FOLLOWING PAGE)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 2 OF
Projeet Noaa: CHEVRON GKAM3 UATER nOOEL
Owner/Client: CHEVRON U.S.A.. SALT LAKE CITY. UTAH
Boring/Uall Nuaber: 0-3-1
Boring/Hell Location: 8065.97 N 7993.52 E
Proj oet Nuabert UC-1T5-15-01 Reference EI overt i
Reference Point:
«: 5213.53'
TOP OF PVC CA9TN6
Data OriI lad:
Logged by
16-20 DEC 1991
JRP
Drilling Contractor: ZIMMERMAN UELL SERVICES
Ori11ing Method: CABLE TOOL Rig Typo:
Firat occurrence of* S.U.
Dates Measured:
app. 5' Static U.L.:
16 t 23 DEC 1991
5217.95'
ARTESIAN
Boring Depth (Ft): US'
Boring Dioaeter lin): 8 1/5*
Uoll Depth (rt): 115'
6
100-
LITH0L06IC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
DETAILS
110—
SANOY SILT: Fine to very Fine grained.
SAN0: Very course to very Fine grained. Poorly
sorted. Carbonate and Muscovite. Reacts with
HCI. Saturated. Methane bubbles. Flowing
send. Black and white colored grains.
SILTY CLAY: Saturated. Gray.
(UELL CONT. FROM PREVIOUS PAGE)
20-50 Mesh Si Iica Sand
2" Schedule 50 PVC
0.010" Slot Screen
Threaded End Plug
120—
130—
ISO—
160—
170—
200-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE
Project No**: CHEVTOH GROUNO UATER MODEL
OHner/CI ionf CHEVRON U.S.A.. SALT LAKE CITT. UTAH
Boring/Uoll Hjmbttr-- 0-35-00
Boring/Hal I Locotion' 31 N 7996.02 E
Project Number. UC-175-15-01
Reference Eli
Reference Point:
m: 5213.53'
TOP Of PVC CASING
Oate OriI led:
Logged by
28 DEC 91
JRP
3 JAN 92 Ori 11 ing Conti mlur: ZMEFHtkH UELL SERVICES
Ori 11 ing Hethad: CABLE TOOL Rig Type:
first
Dotes neosured:
of G.U. 5' Static U.L.
28 OCC 1991
FLOUING Boring Depth (rt): 115.S*
Boring Diameter I inl: 8 1/5*
Uell Depth (ft): 115'
io—:
so— /
100-
70-///
so-///
I-Ate
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
SANOY SILT: Very fine groined. Micaceous. Very dork
grayish brown (2.S Y 3/2).
SILTY CLAY: Saturated. Olive gray (S Y 5/2).
Locally sandy. Gray (5 Y 5/1) at 25 feet.
Sandy.
Sandy Very dark gray (7.5 YR 5/1) ,
/// ^
y^/t/^SANO
Very coarse to very fine grained. Poorly
Black and white sorted. Reacts to HCI
(LOG CONT.) colored groins
UELL COMPLETION
DETAILS
. Cement
. Benton i te Grout
.2" PVC Cosing, Schedule 50
. 20-50 nesh S iIi ca Send
(UELL CONT ON FOLLOWING PnGE)_
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
EARTHFAX ENGINEERING. INC. HYDROGEOLOGIC LOG PAGE 2 OF 2
Project Note: CHEVRON GROUND UATER rIOOEL
Owner/CIlent: CHEVRON U.S.A.. SALT LAKE CITT. UTAH
Boring/weII Number' 0-34-00
Borlng/Holl Locotion B0B3.31 N 7996.02 E
Project Number• UC-175-15-01 Reference Ela
Reference Point:
wi- 1213.11'
TOP OF PVC CASING
Dote OriI led:
Logged by:
28 OEC 91
JRP
3 JAN 92 Ori 11 ing Contractor: ZIMMERMAN UELL SERVICES
Drilling Method: CABLE TOOL Rig Type-
Firet occurrence of S.U.
Dotes Measured:
1' Static U.L.: FLOWING
28 OEC 1991
Boring Depth tftl• 115.5'
Boring Oi paster I in): 8 1/1"
Uell Depth (ft): US'
S S
100-
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
DETAILS
110—
SANO: Very coarse to very fine
sorted. Reacts to HCI.
colored grains.
ro i ned. PoorIy
lack and white
fVV\ SILTY CLAY: Saturated. Gray.
(UELL CONT. FROM PREVIOUS PAGE)
. 20-10 Mesh Si I ico Sand
.2" Schedule 10 PVC
0.010" Slot Screen
.Threaded End Plug
120—
130—
ISO—
160—
170—
180—
190—
zoo-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING. INC. HYDROGEOLOGIC LOG PAGE or
Project Nam*: CHEVRON GROUND UATER nODEL
OwrwWCI ierrt: CHEVRON U.S.A.. SALT LAKE CTTT. UTAH
Boring/Uell Number: EF-16 0
Boring/well Locotion: 7321.87 N 12,122.37 E
Project Nuaber' UC-17S-1S-01 Reference Elevation: 1216.10'
Reference Point: TOP Of PVC CASING
Date OriI led: 25-28 OCT 1991
Logged by: An
Ori 11 ing Contractor: ZZrtlCRrlAN UELL SERVICES
Ori 11 ing Method: CABLE TOOL Rig Type:
fire,* occurrence of 6.U.: —
Ootco Heoaured: —
Static U.L.: FLOUINS Boring Depth
Boring 0
IftJ: 95*
(in):
Uell Depth (ft): 91.75'
8 1/1-
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
DETAILS
SANO
10-
20—
Med i um ta coarse gra i ned. Some f i ne grove I .
Subangular to angular.
Sand. Very fine to fine grained. Mic
Some coarse sand and fine gravel, decreasing
after 10'.
» i
30-
50-
SILTY SANO: Sand is fine to very fine grained.
Occasional angular grovel up to 1/8"
Becoming more silty with depth.
CLAYEY SAN0: Sand is fine grained, micaceous. Some
medium to coarse grained eond and sub-
angular grovel up to 1/1-. Medium to high
p I aet i c i ty.
SANOY GRAVEL: Sand is predominantly fine grained,
micaceous. Gravel is angular, up to 1/2"
SO-
TO—
90—
SANO: Sand is fine grained, micaceous. So
sand and angular gravel up to 1/1".
si It.
Trace
Trace clay at 75 - 80"
CLAYEY SANO: Sand is predominantly fine grained.
micaceous. Some angular gravel up to 1/1"
Medium to high plasticity.
SANOY CLAY-Some silt. Sand is fine grained,
High plasticity micaceaus.
I
I
..Neat Cement
.2* Schedule 10 PVC Cooing
.Benton i te Grout
. 20-10 Mesh S i I i co Sand
•Z' Schedule 10 PVC
0.010" Slot Screen
. Threaded End PI ug
100-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 1 OF
Proj act Nona ' CHEVRON GROUND UATER MODEL
Owner/Client: CHEVRON U.S.A.. SALT LAKE CTTT. UTAH
Boring/Mai I Nuaber> EF-17 D
Boring/wall Locotion: IL 116.83 N 8180.90 E
Project Number • UC-17S-1S-01
Reference Elevation: 1213.35'
Reference Point: TOP OF PVC CASING
Data Drilled: 5-15 OEC 1991
Logged by:
Ori 11 ing Contractor: ZJItTERflAN UELL SERVICES
Ori 11 ing Method: CABLE TOOL Rig Type:
First occurrence of G.U.: app. 3' Static U.L.: FLOWING
Dates Measured: 5 OEC 1991
Boring Depth (rt): 120'
Boring Oiometer I in): 8 1/1*
Uell Oepth (ft): 118'
10—
:7pp -///
'./// /// .///
:MA
;///
zo-^/// ;///
;///
-Ms.
-///
///
:/ /
60-
100-
1///
-a-///
I///
-///
-///
:///
so-'4'
-/// :/// ./// -/// V/A
:'//,
\'/,A
-///
^///,
;///
'-///
v//,
90-//
V/,
/
V'
V V'
/
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
SILTY CLAY: Organic material. Oesiccotion cracks in upper
1/2 foot. Friable. Moist. Mottled. Very
dark brown (10 YR 2/2) to oliva gray (5 Y 5/2).
01ive gray (5 Y 5/2).
; i
Local thin laminations of sand. Fine grai
Very dork gray (5 Y 3/1) at 19 feet. Mi
Very fine grained sand lenees.
Dark gray (10 YR 1/1).
Localized thin layers of very fine grained eond.
Methane bubbles up the hole.
(LOG CONTINUEO ON FOLLOUING PAGE)
UELL COMPLETION
OETAILS
• Cement
.Benton i ta Grout
.2" PVC Caeing, Schedule 10
- 20-10 Mesh Si Iica Sond
(UELL CONT. ON FOLLOUING PAGE)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE z or
Project i
Owner/CI iorrt'
CHEVRON GROUND UATER MODEL
CHEVRON U.S.A.. SALT LAKE CITY, UTAH
Bor/ng/Ual I Nuabsr: ET-1T 0
Boring/Mall Location' 11.116 .85 N 8180.60 E
Projoet Number' UC-175-1S-01
Raference Ela
Refwenct Point:
xv 1213.35'
TOP OF PVC CASING
Dot* Ori I lad:
Logged by
5-15 DEC 1991
JRP
Ori 11 ing Controertor: ZXHtCRTMN UELL SERVICES
Ori11ing Method' CABLE TOOL Rig Type'
first occurrence of G.U.
Ootea Measured'
app. 3' Static U.L.
5 OEC 1991
FLOWING Boring Depth (ft): 120'
Boring Diameter Iinl: 9 1/1*
Uell Depth (ft): 118'
100--SILTY CLAY: (Continued from previous poge.)
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
DETAILS
110—
SANO: Med i ue to f i ne ara i ned. Poor I y sorted.
Flowing sand. Saturated. Black and whil
colored grains.
120-
SILTY CLAY: Gray (5 Y 5/1).
(UELL CONT. FROM PREVIOUS PAGE)
— 20-10 Mesh S iIi ca Sand
.3* Schedule 10 PVC
0,010" Slot Screen
• Threoded End Plug
130—
ISO—
160—
170—
180-
190—
zoo-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE l or 1
Pr-oj «o*t
Ounar/CI i
CHEVRON GROUND WATER nOOEL
CHEVRON U.9.A., SALT LAKE CITY. UTAH •ino/Wel I
• ET-S-OSA
BW li.lT0.-T7M 1Z.1-W.19E
Project Nustoer. UC-1TS-15-01 AeTarsnca Elevation' KM. 19'
RtfirtiiM Point. TOP OT PVC CASINO
Dote Or-lllad' 16 NOV 1991
Logged BV'
Ori 11 ing Contractor' ZlnrCATVNN UELL SERVICES
Ori I I ing Method. HOLLOW TEH AUGER Rio Typ«"
rirsT
OotM haps
ranee oT S.U.' 8URTACC Stotlc U.L.' 3.23' Boring Depth lrt> > 2Z' Moll Osprth irt) >
r«d' AG NOV 81 8 OCC 91 BorlnQ Dlcmw Un) • T 3/1-
IT'
s= 3
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL CODPLETION
OETAILS
10-
1
'//,
15-
20-
V/
m.
25-
SANOY SILT' 1SX vary Tina groinad aond. Orgonic aotariol .
Saturatad. Light brownioh gray (10 YR 6/2).
Color changes to light oliv» gray IS Y 6/21 at
1 foot.
SILTY CLAY: Saturated. Palo brown (10 YR 6/3). Color
ehangee to pole brown (5 Y 6/2) at 9 Feet.
SANO: Coarss—graineeV poorly sorted. MaxiHUB grain
size O.S cm. Sub-angular to sub-rounded
grains. Flowing sand. Saturated. Black and
white colored graine.
SILTY CLAY- Very dork gray (2.S YR 3/1).
Bentonite Seal
2- PVC Cosing, Schedule 10
• 20-10 Mesh S iIi ca Sand
2- Schedule 10 PVC
0.010* Slot Screen
• Threaded End PI ug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EnRTHFrtX ENGINEERINB. INC. HYDROGEOLOGIC LOG PAGE i or
Proj oo*
Owner/CI
CHEVRON GROUNO MATER nOOEL
CHEVRON U.S.A.. GAIT LAKE CITY. UTAH
•ing/Mel I
Bon i no/Ue I I Looi
Nunbip. EF-5
li.lTfc.gTM 12.150 .52 S
Proj oet UC-1T3-1S-01 Reference Elevotiom
RoTerswco Point- TOP OT PVC CASING
Oete OriI
Looflod By
Isdi 19 NOV 1991
JRP
Ori 11 ing Contractor
Ori I I ino Method
IBB B_AJ IAN PEL I. SERVICES
STEM AUGER Rio Typo'
rirot
DffHi Hoi
occurrooco of S.W. : SURFACE Static U.L. :
19 NOV 91
3.66' Boring Depth (rt) : 22'
2 OEC 91 Boring DlwiUf Mn) : T 1/*m
UoiI Oeptn ittt' IT*
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
COMPLETION
0ETAILS
s—j
10-
SANOY SILT' 13Z vary Tina gramad eond. Organic notarial.
Saturated. Light brounieh gray (10 YR 6/2) .
Color changao to tight ol ivo gray (5 Y 6/Z) at
1 Foot.
YY, >
//y
///
///
///
///
///
///
ML
SILTY CLAY' Saturated. PaI
to pole
e broil (10 YR 6/3). Color
(5 Y 6/2) at 9 Feet.
SANO' Coarss
size 0
groine. Flowing eond
white colored graine
grained, p
5 ca. Sub-angul
• y sorted. MaxiBUB grain
jr to sub-rounded
Saturated. Block and
15—
20-7T7 /AA /'
V" // VVV
SILTY CLAY' Very dork groy (2.5 YR 3/1).
• Benton i to Sea I
• 2* PVC Cosing, Schedule 10
-20-10 Mesh Silico Sand
•2" Schedule 10 PVC
0.010" Slot Screen
.Threaded End PIug
25-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EnRTHFnX ENGINEERING. INC. HYDROGEOLOGIC LOG PACE
Project
Ownsr/CI i
CHEVRON GROUND UATER MODEL
CHEVRON U.S.A.. CALT LAKE CITY. UTAH
-ing/Uel I
i up/Via 1 I
ET-S-OGC
H.AS6.S3H 12. AGS• 09 E
ZZ3.BS'
TOP or rvc CAGTNG
Oate Ori I led. 19 NOV 1991
Logged By
Ori 11 ing Corrtroc-tor. ZmCAIIAN UELL 8EBVICE9
Ori I I ing Method. HOLLOU STEM AUOEW Rio Type-
r I r st ooi
OotM Mai
:eurrsnea oT G. 14. SURrACC Startle
19 NOV 91
U.L. 3. SB'
2 OEC 91
Bering Depth CPtl. 22'
Boring Oloeeter I In): T 3/1*
Uel I Oapth irtl i AT*
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
COMPLETION
DETAILS
5-;
10-
SANDT SILT: 1SX very r i ne gra i ned eond. Organ i c mater i a I .
Saturated. Light brownish gray (10 TR 6/2) .
Color changes to I ight ol ive gray (5 Y 6/2) ot
•J Fset.
r V. ,
//y /// /// /// /// -/// /// ML
SILTY CLAY: Saturoted. Pa11
ehangee to pole brown
(10 YR 6/3) . CoIcx-
IS Y 6/2) ot 9 feet.
SANO: rained, poorly sorted. Maximum grain Coaree gra
sizs 0.5 a
gra i ns. F
whita colored grains
I P°
Sub-angular to sub-rounded
owing sand. Saturatsd. Slock and
15-
20-7yy /// /// /// ///
ML
SILTY CLAY= Very dark gray (2.5 YR 3/1).
• Benton i te SeaI
. 2* PVC Cos i ng, Sehedu I a 10
• 20—10 Mesh S i I i co Sand
• 2" Schedule PVC
0.010* Slot Screen
• Threaded End Plug
2S-
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE 1 OF 1
Proj ect Noae> CHEVRON GROUND. UATER MODEL
Owner/Client: CHEVRON U.S.A.. SALT LAKE CITT. UTAH
Borlng/well Nuaberi EF-13-08
Boring/UsI I Location! 10, 169• 3*1 N 7371.6-1 E
Proj act Nuafaar< UC-17S-1S-01
Reference Elavotion: -1711.32'
Rafaraoca Point: TOP OF CASING
Data OriI lad: 9 DEC 1991
Loggad By: JRP
Ori11ing Contractor: ADVANCED AUGER INC.
Ori11ing Method: HOLLOU STEM AUGER Rig Typo.
Firot accurronca of G.U. : app. 1' Static U.L.
Dateo Measured: 9 OEC 91
5.59'
15 JAN 92
Boring Depth (rt): 32' Uel I Depth (rt) > 31'
Boring Oiumotoi (in): 10 1/1"
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
SILTY CLAY: Oecooionol thin sand I
(10 YR 5/3).
UELL COMPLETION
DETAILS
//
V//
•///
///
.///
///
///
///
///
.///
•''//
<*-'//,
///
.///
///
A//
//
"A
20—
enses. Moist. Brown
Color changes to gray (10 YR 5/1) at about 5 Fee
Saturated
SILTT SANO: AI tsrnatea between a i 11, sand, and s i I ty sand.
Msd i un to F i no gra i ned. tt i coceoue. Reacts
with HCI. Gray (10 YR 5/3).
10—
.Benton i te Sea I
.2* PVC Cooing, Schedule 40
. 20-10 Mesh Si Iiea Sand
•2" Schedule 10 PVC
0.010" Slot Screen
• Threaded End PIug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
EARTHFAX ENGINEERING, INC. HYDROGEOLOGIC LOG PAGE i or
Prejsot NOM' CHEVRON GROUNO UATER MOOEL
Owner/CI iont. CHEVRON U.8.A,. SALT LAKE CITY. UTAH
-ing/Uell NUMMP
i no/we I I Locotion TG-TT.93 N 11.1S9.11 E
Project Number. UC-17S-15-01 Reference devotion. •Sift.99'
Reference Paint. TOP OF PVC CASINO
Ori I I ing Controetor. ZlrTCRrlAN UELL SERVICES
Ori I lino Method. HOLLOU STEM AUOER Rio Typ». —
Dots Ori I
Looped By
lad- 20 SEPTEMBER 1991
rirat
Ootaa
0-
anee oP S.U. • Static U.L. -Ing Oepth (rt) i 12.9' Uel I Depth (rt) i 12'
•Ing Oloaatar Un): T 3/1"
LITHOLOGIC DESCRIPTION
ANO OBSERVATIONS
UELL COMPLETION
DETAILS
777
///
/// // // /
// -// // /// ///
10-///
///
///
///
///
»/
//A
-///
ML
15—
20—
25-
HAN-PLACEO FILL: Fine to aediua aond and rounded gravel
up to 1". brown.
SILTY SANO: Sand Fine. Micaceous, with trace cloy and Fir
rounded gravel, wet. Grades To gray at *)'.
SILTY CLAY: Trace of sand. Soft. Olive gray.
Bentonite Seal
2" PVC Casing,
Schedule 10
•20-10 Mesh Silica Sand
• 2" Schedule 10 PVC
0.010" Slot Screen
- Threaded End PIug
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-1 BORING S-2
ELEVATION 4zio e: recr
ISM
ML MOWN CLAYEY SILT
1.41 FEET TO WATE* ON 7- 10-11
SM
TAN SILTV FINE SANO WITH TRACE
MEDIUM SANO
SLUDJH-ORAY CLAV
OKAY FINE TO MEORIM I
TRACE SILT
OITERLAYERED GRAY CLAY ANO SS.TY
FINE TO ME MUM SANO
BORING COMPLCTeO AT II. 0 FEET
ON 1— II — H
CO0R0MATES* E. I0.238.4 H. 7752.6
ELEVATION «I7 S I fEET
SM
CL
SM
SP
BLACK SILT TO FINE CHAVCL. SOME OIL
OR ASPHALT FRAGMENTS {FILLI
SLACK TO SROWN SK.TY FINE SANO.
OIL ODOR
GREENISH—CRAY SILTY CLAY
1.0* FEET TO WATER ON 7- 30 - II
BLACK SILTY FINE SANO
w GREENISH-GRAY SILTY CLAY
SLACK FINE TO MEDIUM SANO. OIL
SORING COMPLCTEO AT IS.0 FEET
ON 5- II - 01
COOROMATES' E. 9283.4 N. 10.742.3
LOG OF BORINGS
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-3 BORING S-5
ELEVATION 4210 2 : FEET ELEVATION <2l» i: FEET
8
SM
SM
SP
SM
SP
SP
BROWN SILTY FINE SANO. MOIST . MINOR
ROOTS
BROWN SILTY FINE TO MEOIUM SANO,
TRACE FINE GRAVEL
4.12 FEET TO WATER ON 7 - 2» - II
> GREEN SILTY FINE SAND
GREEN FINE TO MEDIUM SANO
GREENISH—GRAY FINE TO MEOIUM SANO
BORING COMPLETED AT IS. 0 FEET
ON S - J - »1
COORDINATES N II. 141.2
E 11. 410.1
SM
SM
SM-
SP
BROWN FINE SAND TO FINE GRAVEL
TRACE SILT (FILL)
BLACK TO DARK BROWN SILTY FINE
SAND. MOIST
DARK BROWN TO BLACK SILTY FINE
SANO WITH TRACE FOSSIL FRAGMENTS
MOIST
i.27 FEET TO WATER ON 7- 2» - II
U GREENISH—GRAY SILTY FINE SANO.
I- TRACE ROOT FRAGMENTS. WET
GRAY SILTY FINE SAND WITH INTER-
LAYERS OF FINE TO MEDIUM SANO.
TRACE ROOT FRAGMENTS
1
BORING COMPLETED AT IS. S FEET
ON S - * - li
COORDINATES N ml. 4
E 12. 711.1
LOG OF BORINGS
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-4
ELEVATION 4222 J'
ML DARK BROWN SILT WITH FINE* SAND
SP
SP
WATER LCVEL AT S.O FEET ON »—!•—Bl
BROWN FINE TO MEDIUM SANO
SCREENED INTERVAL
BROWN FINE TO MEOIUM SAND
BORING COMPLETED AT 20.0 FEET
ON • — 12 — 61
COOHDINA1ES N II. 701.0
E II. 072.5
LOG OF BORING
Dames ft Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
BORING S-6
COORDINATES H 11. 100
ELEVATION 42II. 9' C 10. 700
s
t 10-
z
8
14-
ML
Ml7
ML
••OWN S4LT WITH SOME CLAY ANO MOOTS
GRCEMSH-GRAY CLAYEY SILT
WATER LEVEL AT 9. 11 FEET ON O-I0-0I
6RA0ES WITH SOME
SANO
ORAY CLAYEY SILT WITH
SANO (ML!
BORXC COMPLETED AT 17.0FEET
ON • — 12 — 11
BORING S-7
ELEVATION 42 It. 9'
N 11. 775
E 10. 710
BORING S-8
COORDINATES N 10. IIS
ELEVATION 4211.0' E 10. KU
o*-
ML SROWN SILT WITH SOME CLAY ANO ROOTS
SM
SM
WATER LEVEL AT S. 00 RETT ON •—10-01
aRCENISH-6RAY SILTY FR4E SANO WITH
TRACE COARSE SANO
GRADES WITH OCCASIONAL CLAY
ANO GRAVEL LAYERS
GREENISH-GRAY SILTY PINE SANO
SORING COMPLCTEO AT '5.0 FEET
ON 0—12-11
BORING S-9
COORDINATES N 10. 910
ELEVATION 4219.2' C 10. 170
3 10-
x
A*
8
[FlLU FILL COMPOSED OF GRAVEL AND COMLES
fjy_ DARK SROWN ANO UGHT GRAY MOTTLED
CLAYEY SILT WITH TRACE GRAVEL
— J WATER LEVEL AT 9.09 FEET ON 0—10—01
ML
SP
CL
GREENISH—GRAY CLAYEY SILT WITH
TRACE FINE SANO AND STRONG
CHEMICAL DOOR
GRAY FINE TO MEDIUM SANO WITH STRONG
CHEMICAL OOOR
GRAY SILTY CLAY
BORING COMPLETED AT K.J FEET
ON I - IJ - II
3zo%-7oa i SM
•IHWH CUVLY LILT
.GREENISH-GRAY CLAYEY SILT
WATER LEVEL AT 4.90 FEET ON O-IO-II
KEY '-••e
A FIELD MOISTURE EXPRESSED AS A PERCENTAGE
OF THE ORV WEIGHT OF SOIL
• DRY OENSITY EXPRESSEO « UOS. PER CVRIC
FOOT
C SLOWS PER FOOT OF PENETRATION USMG A
•40 LS. HAMMER DROPPING 10 INCHES
• DEPTH AT WHICH UNDISTURBED SAMPLE WAS
EXTRACTED
• DEPTH AT WHICH DISTURBED SAMPLE WAS
EXTRACTED
GRAY SILTY FINE SAND WITH SLACK
MOTTLR4G
MRING-COMPLETED AT 17.0 FEET
ON 0- 11-11
LOG OF BORINGS
(PREVIOUS INVESTIGATION)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
BORING S-IO
ELEVATION 4117 t» FEET
BORING S-11
ELEVATION 4217 SI FEET
S '2-
GM
IFILL)
CL
CL
ML
SM
BROWNISH-GRAY GRAVEL. SANO. SILTS
AND CLAY VILLI
GREENISH—GRAY SILTY CLAY WITH
TRACE FINE SANO
, BROWNISH—GRAY CLAV WITH TRACE
\ SILT ANO SANO
WATER LEVEL AT 1.10 FECT ON 11-12-11
BLACK MOTTLING BETWEEN I.S
TO 11.5 FEET
CHEMICAL ODOR
GRADES WITH SOME SILT
BLUISH-GRAY SILT WITH SOME CLAY
ANO FINE SANO. MICA PRESENT
BLUISH-GRAY FINE SAND WITH SOME
SILT ANO CLAY. MICA PRESENT
GRADES WITH TRACE SILT AND
CLAY
BORING COMPLETED AT 25.0 FEET
ON 11 - 2 - II
BACKFILLED WITH BENTONITE
TO 17.5 FEET
COORDINATES • N Mil.)
E tTOI.I
GM
lIlFILLI
I ML
| ML
ML
BROWNISH-GRAY GRAVEL. SAND. SILT
ANO CLAY TILL)
GREENISH—GRAY FINE SANDY SILT
"\ TRACE OF CLAY. MICA PRESENT
WATER LEVEL AT 1.10 FEET ON 11-12-01 ;
1 BLACK MOTTLING AND CHEMICAL j
\ OOOR BETWEEN 1.0 AND 17.0 FEET J
GREENISH-GRAY SILT WITH SOME FINE !
SAND TRACE OF CLAY (
GRAY SILT WITH SOME FINE SAND AND
CLAY
BORING COMPLETED AT II. S FEET
ON 11-4-11
COORDINATES > N 1571.2
E 0041.1
LOG OF BORINGS
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WELL
CONSTRUCTION
BORING S-12
J'.EVATION 4216.0 COORDINATES N I00X.2
E 9653.3
WELL
CONSTRUCTION
BORING S-13
ELEVATION 4214.3 COORDINATES N 10SK.I
E 9936.3
'II
.'•It
GM
(FILL)
:• WATER LEVEL AT 5.9 FEET ON 2—2—04
ML
SM
BROWN SILTY FINE AND COARSE CRA VEL
WITH SOME FINE TO COARSE SAND -
MEDIUM DENSE (FILL)
GRAY CLAYEY SILT WITH SOME FINE SAND
TRACE ORGANICS - OIL STAINED -
HYDROCARBON ODOR
GRAY SILTY FINE SANO - MEOIUM
DENSE
ML
SM
BROWN SILTY FINE AND COARSE GRAVEL
wrTH SOME FINE TO COARSE SAND -
MEOIUM DENSE "
GRAY CLAYEY SILT WITH TRACE FINE
SAND - SLIGHT HYDROCARBON
OOOR AND SOIL STAMINA
GRAOING WITH STRINGERS OF
SILTY FINE SAND - NO
HYDROCARBON OOOR OR STAINING
GRAY SILTY FINE SAND
GRAY SILTY CLAY - VtRY SOFT
GRADING WITH STRINGERS OF
SILTY FINE SAND - HYDROGEN
SULFIDE ODOR
BORING COMPLETED AT 14, J FEET
ON 3-2-44
KEY TO WELL CONSTRUCTION
Muru
IO-«0 «*JOC
I tvcSOCPJU: 40 tm WTM on MO SLOTS
B0RS4G COMPLETED AT 19.0 FEET
ON 1-1-04
KEY TO SAMPLING
SYV«^ OLCW COUNTS
SAMH.PJO TYKt ANO SLOW COUNTS
- U TYPC SAHPL4P AMD NUMSCN OF P.CWO
•COUMCO TO otivc lAMPuxn ONC roor
U»P*A IP POUNOMfMMCN C«0**M4 »
MCNCB IP* MDKATCt THAT A TMM WAU.CD
CXTCHSlOK WAS ATTACNCO TO TMC U TY»C
SUPU» ANO MA PUtMCO TO CSTAv*
•CCOVCRV OF «AiMn.C
DtNOTCO SMWlAW ATTEMPT WITH NO
•CCOVCNV
CCMOTCS UNOSTUMIO AAMAU
LOG
OF
BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WELL
CONSTRUCTION
BORING S-14
ELEVATION '216.0
BORING S-15
COORDINATES N 10100.8
E 10110. I
rr*J$£±*.*... ELEVATION J2I1.5 CONSTRUCTION
COORDINATES N IMN. >
E 11502.0
* 6-
z
£
CL
GM
(FILL)
ML
i
SM'
ML
BROWN SILTY FINE AND COARSE GRAVEL
WITH SOME FINE TO COARSE SAND
LOOSE (FILLi
GRAY CLAYEY SILT WITH SOME FINE
SANO - MEOIUM STIFF - SLIGHT
HYDROCARBON OOOR
WATER LEVEL AT 2. 4 FEET ON 3—6-04
GRAY SILT AND FINE SANO WITK SOME
GYPSUM CRYSTALS - LOOSE
GRAY SILTY CLAY WITH TRACE FINE
SAND - SOFT
GRADING WITH STRINGERS OF
SILTY FINE SANO
0- 7 —
RORING COMPLETED AT 12.0 FEET
ON 3-S-04
GM
(FILL)
• 57
CL
ML
•13
'M
SM
ML
SM
BROWN SILTY FINE AND COARSE GRAVEL
WITH SOME FINE TO COARSE SAND -
MEOIUM DENSE (FILLi
GRAY CLAYEY SILT WITH TRACE FINE
SAND - STIFF - SLIGHTLY CEMENTED
PINHOLE STRUCTURE
GRAY SILTY FINE SANO - LOOSE
BROWN CLAYEY SILT WITH TRACE FINE
TO COARSE SAND - SOFT
GRAY SILTY FINE SAND - LOOSE
BORING COMPLETED AT 12. S FEET
ON 3-6-14
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WELL
CONSTRUCTION
BORING S-16
ELEVATION 4219.9 COORDINATES N 103*0.9
E 12371.2
I ML •ARK BROWN CLAYEY SILT WITH TRACE
FINE SANO - STIFF (FILL)
__ WATER LEVEL AT 2. 2 FEET ON 3—0—04
ML LIGHT BROWN SILT WITH TRACE FINE
SAND - LOOSE
GRADING GRAY IN COLOR
GRADING CLAYEY
SORINTC COMPLETED AT 12.0 FEET
ON 3—0—04
WELL
CONSTRUCTION
BORING S-17
ELEVATION 4221.0 COORDINATES N 10(40. 2
E I2S3I. •
U SI2
GM
ftrru.)
1ML-
CL
GM-
SM
BROWN SILTY FINE TO COARSE GRAVEL
WITH SOME FINE TO COARSE SILT -
LOOSE (FILL)
GRAY CLAYEY SILT KITH TRACE FINE
SAND - MEOIUM STIFF
WATER LEVEL AT 1. i FEET ON 3-7-04
GRAY SILT) FINE TO COARSE SAND AND
GRAVEL - MEOIUM DENSE (GRAY
SANDSTONE GRAVEU
GRACING WITH OCCASIONAL
COBBLES
BORING COMPLETED AT 12.0 FEET
ON 3-t-K
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WELL
CONSTRUCTION
BORING S-18
ELEVATION 4217.7 COORDINATES N 9401. I
E 100*3.3
WELL
CCINSTWJCTK3N
BORING S-19
ELEVATION 4214.3 COORDINATES N MM. 3
E 11237.2
z
S
or
GM
SM
(FILL)
I WATER LEVEL AT 5. 53 FEET ON 3-5-04
SM
CL
BROWN SILTY FINE TO COARSE SANO
ANO GRAVEL - MEDIUM DENSE (FILL)
GRAY SILTY FINE SANO - MEOIUM
DENSE
GRA OOfG LOOSE WITH LAN ERS
OF SILTY CLAY AND CLAYEY SILT
GM
(FILL)
ML
SM
ML
BROWN SILTY FINE AND COARSE GRAVEL
WITH SOME FINE TO COARSE SAND
ANO OCCASIONAL COBBLES - LOOSE
(FILL)
rATER LEVEL AT 0.1 FEET ON 7-0-04
GRAY CLAYEY SILT WITH TRACE FINE
SANO - SLIGHT HYDROCARBON
ODOR - STIFF
GRADING WITH STRINGERS OF
SILTY FINE SAND
GRAY SILTY FINE SAND - LOOSE
GRAY CLAYEY SILT WITH TRACE FME
SANO - SLIGHT PINHOLE STRUCTURE
GRADING WITH SANDY STRINGERS
BORING COMPLETED AT 11.5 FEET
ON 3-0-04
GRAY SILTY CLAY - SOFT
KEY TO WELL CONSTRUCTION
GRA DING WITH LAYERS OF SILTY
FINE SAND - LOOSE
I >VC tCMEOtlLl «0
KEY TO SAMPLWC
ft TY« m %s- PLOP COUNT*
«ll - OC
PIELO iAOISTURC — — OPT ODWmr
tAMPLMG TVTC1 ANDM.OW COUNTS
» or PLOWS mi m Ot — UTVM
NCOUPCD TO CPtvf PMN.P ONC FOOT
UtmS A !• NOUNONAMMOt CPWPC JD
HCHB* IM IIIKtTII THAT A TMM WAIXCO
CXTOANW »AS ATTACNf 0 TO TMC U TVPC
SAMPL.0I ANO MAS WpMCD TO OSTAM
NCCOVCNY Of SA*NN_C
HNO
BORR4G COMPLETED AT lt.0 FEET
ON 3-5-04
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
BORING S-20
WELL ELEVATION 4217. I
CONSTRUCTION
COORDINATES N 94(1. I
E 1210*.0
JU2.
GM
SM
(FILL)
ML-
SM
SM
BROWN SILTY FINE TO COARSE SANO ANO
GRAVEL - LOOSE (FILLI
GRADES WITH LESS GRAVEL
GRAY CLAYEY SILT AND FINE SAND •
LOOSE
GRAY SILTY FINE SAND - LOOSE
BORING COMPLETED AT 13.0 FEET
ON :
BORING S-21
WELL ELEVATION 4213. t
CCIWWCTION
COORDINATES N 1710.*
E 11341.0
Z
S 7-
B
-Stt.
mjS.
GM-
SM
(FILL)
ML
(FUJ
SM
CL-
MU
BROWN SILTY FINE TO COARSE SANO
ANO GRAVEL - LOOSE (FILL) -
OIL STAINED
DARK BROWN CLAYEY SILT WITH TRACE
FINE SAND - SLIGHT PINHOLE
STRUCTURE - SLIGHT HYDROCARBON
OOOR - STIFF
X WATER LEVEL AT 2. 2 FEET ON 2-20-04
GRAY SILTY FINE SAND - LOOSE
GRAY CLAYEY SILT WITH TRACE FINE
SANO - VERY SOFT
GRADING WITH STRINGERS OF
SILTY FINE SAND
SLIGHT HYDROCARBON ODOR
BORING COMPLETED AT 11.0 FEET
CN 2-29-04
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WELL
CONSTRUCTION
BORING S-22
ELEVATION 4213.1 COORDINATES N 7904. I
E 120M.4
UJ 9
A
GM
SM
BROWN SILTY FINE AND COARSE GRA VEL
WITH SOME FINE TO COARSE SAND -
LOOSE
LIGHT BROWN CLAYEY SILT WITH TRACE
FINE SAND - MEDIUM STIFF -
SLIGHT PINHOLE STRUCTURE
GRAY SILTY FINE SAND - LOOSE
GRADING WITH TRACE MEOIUM
SAND
GRADING WITH SOME SILT
(SM-SP)
BORPIGCOMPLETEC AT 12.5 FEET
ON 2-27-14
BORING S-23
ELEVATION 4213.4
CONSTRUCTION
= S 13
COORDINATES N 7130. Z
E 11470.4
SM
GM
(FILL)
SM
BROWN SILTY FINE TO COARSE SANO
AND FINE GRAVEL - LOOSE (FILL.
LIGHT BROWN SILTY FINE SAND - LOOSE
GRADING GRAY IN COLOR
GRADING WITH STRINGERS OF
CLAYEY SILT
GRAY CLAYEY SILT WITH LAYERS OF
SILTY FINE SANO - SOFT
BORING COMPLETED AT 12.S FEET
ON 2-27-04
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
BORING S-24
JJS-,L_.. ELEVATION 4210.6
CONSTRUCTION
COORDINATES N 702C. I
E 10901.2
WELL
CONSTRUCTION
BORING S-25
ELEVATION 4212.2 COORDINATES N 7741.9
E 10125.5
ML
SM
DARK BROWN FINE TO MEDIUM SANDY
SILT - TRACE ORGANICS - LOOSE
GRAY SILTY CLAY WITH TRACE FINE
SAND - SOFT
1 Pi"
2- -
GRADING WITH STRINGERS OF
SILTY FINE SAND
GRAY SILTY FINE SAND - LOOSE
O- 7-
S
GRADING WITH STRINGERS OF
SILTY CLAY I 1/4 INCHI
BORING COM RL ETED AT 12. 5 FEET
ON 2-20-04
i
a
ML
ML-
SM
CL
BROWN CLAYEY SILT - TRACE
ORGANICS - STIFF
GRAY INTERLAYEREO CLAYEY SILT WITH
TRACE FINE SAND ANO SILTY FINE
SAND - LOOSE
GRAY SILTY CLAY VARVED WITH
STRINGERS OF SILTY FINE SANO •
SOFT
BORING COMPLETED AT 13.0 FEET
ON 2-29-04
KEY TO WELL CONSTRUCTION
3 a l«C4tFS-L
W PVC «>«D*JLf *0
m*t ml* MKM
SLOTS
KEY TO SMW^-WC
SAMPLING TVPCS ANOOLOW COUNTS
••**•« - u Tv»t tp*M*n.CT AWO tnm mm* tr siows
•COUttCD TO OliVC •A***\Jtn OMC FOOT
MCMS fP* WOKATCS THAT A TNM IMLLCO
CXTOsVION WAS ATTAOMCD TO TMC U TVPC
tA**f\JOt AND «**S PUSMC O T O CSTTA SN
KlttOoUV OP SAMPIC
- OCMOTC* tMM*>t.Mt> ATTCMFT WlTM NO
HCUMnrr
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WELL
CONSTRUCTION
BORING S-26
ELEVATION 4212.6 COORDINATES N 77JI.0
E 9974.}
WELL
CONSTRUCTION
BORING S-27
ELEVATION 4211.0 COORDINATES N 7726.9
E 9025.0
J—;
I
9—t-t
CL
SM • 30
ML
SM
ML
DARK BROWN SILT WITH SOME PINE TO
MEDIUM SAND - ORGANIC - LOOSE
BROWN SILTY PINE SANO - LOOSE
3 ?
GRAY CLAYEY SILT WITH TRACE PINE
SAND - BLOCKY - SLIGHT PINHOLE
STRUCTURE - MEDIUM STIFF
GRADING WITH STRINGERS OF
SILTY FINE SAND
DARK GRAY SILTY CLAY - SOFT
GRAOtNG WITH STRINGERS OF
SILTY FINE SANO
HYDROGEN SULFIDE ODOR
•! 6— =
io ' = .-
= •:: ta
ML
ML-
SM
CL
BROWN CLAYEY SILT WITH SOME FINE
TO MEDIUM SAND - ORGANIC -
LOOSE
GRADING WITH LAYERS OF FINE
TO MEDIUM SAND WITH SOME
SILT
GRAY CLAYEY SILT - SOFT
GRADING WITH LAYERS OF
SILTY FUE SANO
STRONG HYDROGEN SULFIDE ODOR
DARK GRAY SILTY CLAY
GRADING WITH OCCASIONAL
STRINGERS OF SILTY FINE SANO
BORING COMPLETED AT 12.5 FEET
ON 2-22-04
GRAY SILTY FINE SAND - MEDIUM
DENSE
HYDROGEN SULFIDE ODOR
BORING COMPLETED AT 15.0 FEET
ON 2-22-04
LOG OF BORINGS
Dames ft Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WELL
CONSTRUCTION
BORING S-28
ELEVATION 4212.2
BORING S-28 (CONTINUED)
COORDINATES N 94(4.3
E 9C01.3
s.
X
s
SP
SM
ML
ML
DARK BROWN SILT WITH SOME FINE TO
MEOIUM SAND - TRACE ORGANICS -
LOOSE
GRADING GRAY IN COLOR
GRAY CLAYEY SILT WITH TRACE FINE
SAND - BLOCKY - SLIGHT PINHOLE
STRUCTURE - MEDIUM STIFF
1 WATER LEVEL AT «
i-IMI
GRADING WITH FINE SANDY
LAYERS
-ri
17-
IB-
IS—
CL
•2/.
Li
DARK GRAY CLAYEY SILT - SOFT
GRADING WITH OCCASIONAL
STRINGERS OF SILTY FINE SAND
BORING COMPLETED AT 22. C FEET
ON 2-20-14
GRAY SILTY CLAY WITH TRACE FINE
SAND INTERLAYEREO WITH SEQUENCES
OF CLAYEY FINE SAND - MEDIUM
STIFF
KEY TO WELL CONSTRUCTOR
3-3
MCoVHJL
•LOTS
GRADES WITH HYDROGEN SULFIDE
OOOR
CARK GRAY FINE SANJ WITH SOME SILT -
LOOSE
KEY TO SPURPLWC
SAMPLING TYPE _ BLOW COUNTS *•%•««
riCLO MOISTURE •— ORT OCHSfTY
SAMPLMG TYPES ANO BLOW COUNTS
•* •» OS - U TTfl WMFLU AND rSJHIt* OT ILOwS
REOUWEO TO O-IIVC SAMPLER ONE COOT
USING A I4D POUNDHR.MMCT DICfFM S
MCMES MO-SATES THAT A THoM WAU.C0
EXTCMSKM WAS ATTACHED TO THE U TTPC
SAMPLER ANO WAS PUSHED TO OSTAW
RECOVERY OT SAMPLE
OCNOTES SAMPLPsG ATTEMPT WITH NO
RECOVERY
— OZ NOTES UN DISTURBED SAMPLE
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-29
...WELL ELEVATION 4211.1 COORDINATES N 94*. 4
CCWSTRUCTION g „,,;,
ML
CL
BROWN SILT WITH SOME FINE SAND •
PINHOLE STRUCTURE - BLOCFY
LOOSE - TRACE SHELLS
X WATER LEVEL AT 2( INCHES ON 2—14—84
BROWN CLAYEY SILT WITH TRACE FINE
SAND - MEDIUM STIFF
GRADING WITH STRINGERS OF
SILTY FINE SAND
DARK GRAY SILTY CLAY - SOFT
GRA DING WITH STRINGERS OF
SILTY FINE SAND
HYDROGEN SULFIDE ODOR
BORING COMPLETED AT 13.0 FEET
ON 2-1 (-04
WELL
CONSTRUaiON
BORING S-30
ELEVATION 4212.4 COORDINATES ft KKit. 2
E 9178.I
ML
CL
SM'
SPl
DARK BROWN SILT WITH SOME FINE TO
MEDIUM SAND - TRACE ORGANICS -
LOOSE
GRAY CLAYEY SILT - SOFT
GRA DONG WITH STRINGERS OF
SILTY FME SANO
GRAY SILTY CLAY - SOFT
GRADING WITH STRINGERS OF
SILTY FINE SAND
HYDROGEN SULFIDE OOOR
GRAY FINE SANO WITH SOME SILT
LOOSE
BORING COMPLETED AT 19.0 FEET
ON 2-21-41
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-31
CCTYSTR&TION ELEVATION 42.1.3
C A HI 6 -
I
X
§'-t
COORDINATES N 10335. 3
E 0144.0
ML
ML-
CL
GRADING WITH STRINGERS OF
SILTY FINE SAND
- WATER LEVEL AT 4. S FEET ON 2-21-04
DARK SROWN SILT WITH TRACE FINE
SANO - TRACE ORGANICS - LOOSE
GRAYISH—BROWN CLAYEY SILT
LOOSE
DARK GRAY SILT WITH STRINGERS OF
SILTY FINE SAND - SOFT
DARK GRAY CLAYEY FINE SANO - LOOSE
' BORING COMPLETED AT 13.0 FEET
ON 2-21-04
BORING S-32
WELL ELEVATION 4212.0
CONSTRUCTION
s
5
CL
COORDINATES N 11430.0
E 1102.4
BROWN CLAYEY SILT WITH TRACE FME
SAND - MEDIUM STIFF
I WATER-LEVEL AT 0. 9 FEET ON 2-23-04
GRADING GRAY IN COLOR
GRAY SILTY CLAY - SOFT
GRADING DARK GRAY WITH
STRINGERS OF SILTY FINE SANO
BORING COMPLETED AT 12.5 FEET
ON 2-23-04
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery . EarthFax Engineering, Inc.
BORING S-33
COft^CTK* ^EVATION 42,1.7
ml •
COORDINATES N 9454.4
E 7933.6
ML
CL
BROWN CLAYEY SILT WITH TRACE FINE
SANO - SLIGHT PINHOLE STRUCTURE
MEDIUM STIFF
I WATER LEVEL AT 1.2 FEET ON 2-15-44
DARK GRAY SILTY CLAY - SOFT
GRADING WITH STRINGERS OF
SILTY FINE SAND
GRADES WITH HYDROGEN SULFIDE
ODOR
BORING COMPLETED AT 13.0 FEET
ON 2—15—44
BORING S-34
WELL ELEVATION 4212,3
cowmjcTioN
COORDINATES N 0071.3
E 7IM.3
ML
l WATER LEVEL AT 2.27 FEET ON 2-23-04
ISM
DARK BROWN CLAYEY SILT WITH TRACE
FINE SANO - TRACE ORGANICS -
MEDIUM STIFF
LIGHT BROWN SILT AND FINE SANO •
LOOSE
GRAY SILTY FINE SANO - LOOSE
GRADING WITH STRINGERS OF
Si-TY CLAY AND CLAYEY SILT
BORING COMPLETED AT 12.5 FEET
ON 2-23-14
LOG OF BORINGS
Dames ft Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING S-35
ELEVATION 4237 3 COORDINATES
X
<3
_ i C-
Z 9—
£
a
8
to
N 11999 9
E 12400 0
ML
5M7
ML
SM-
GM
DARK SROWN CLAYEY SILT WITH TRACE
FINE SAND
BROWN CLAYEY SILT WITH TRACE FINE
SAND - MTERLAYER SEOUENCES
OF SILTY FINE SAND
.RO N SILT> FME TO COARSE SANG
ANC GRAVEL
BORtXG COMPLETED AT 11.0 FEET
BORING S-36
CWSTRUCTKON NATION 4237. J
<= 4
= S
COORDINATES N I ISO.*
E 12906.0
CL
LOG OF BORINGS
LIGHT BLUISH-GRAY CLAY WITH TRACE
FINE SANO
GRADES TO DARK BLUE CLAY
BORING COMPLETEDAT 13.0 FEET
ON 2-16-14.
Dames & Mroore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WATCH LEVEL
1-4- tl
• J.J! I
SUWKl ILEVMKW 4110 &» till GEOPHYSICAL L06
3»rvn>l 5 •-
ST?
ML
CL
11
•yy//\\\\\\\
TAN tlLTT PINE SANO WITH TP ACE MED-
IUM SANO. MAJOR ROOTS. TRACE
SHELL FRAGMENTS
GRAY CLAYEY SILT LAMINATED WITH
WITH SOME FINE SAND
BLUISH-GRAY VARVEO SILTY CLAY
GREENISH-GRAY VARVED SILTY CLAY
WITH 0.23' INTERBEDS OF DARK GRAY
FINE SANO
GREENISH-BLACK TO BLACK CLAY WITH
CLAYEY MEDIUM SAND INTERBEDS •'
THICK
GREENISH-GRAY TO BLACK CLAY AND
SILT
INTERLAYEREO SLACK SILTY FINE SANO
ANO GRAY CLAY
BLACK SILTY FINE SAND
CL • CL L!
ML
S2S3
SM
ML
SP 23B%-it
SM
SP-
SM
THINLY LAMINATED LIGHT TO DARK
GREENISH—GRAY CLAY
DARK GREENISH-GRAY CLAY
GREENISH-GRAY SILT WITH SOME FINE
SAND AND CLAV
DARK GREENISH-GRAY SILTY FINE SAND
- GREENISH-GRAY CLAYEY SILT WITH
£ TRACE FINE SANO
_ GRAY FINE TO MEDHIM SAND WITH TRACE
U TO SOME SILT
GRAY CLAYEY SILTY FINE TO MEDIUM
SANO
J_ GREENISH-GRAY CLAY
BORING COMPLETED AT 00.0 FEET
ON 4 -20- 01
NOTES
THE DISCUSSKJH IN THE TEXT UNDER THE SECTION TITLED.
•SITE CONDITIONS. SUBSURFACE". IS NECESSARY TO A
PROPER UNDERSTANDING OF THE NATURE OF THE
SUBSURFACE MATERIALS.
-S--T n
2
x.. •4 —
J 5
sp-?*-: 00 <
a i
Dbi mcs-naofte
HEVftSM •-•
cgjAjaoRE
:.arr
i-
n
ea
A-B0JC
A FIELD MOISTURE EXPRESSED AS A PERCENTAGE
OF THE DRY WEIGHT OF SOIL
B DRY DENSITY EXPRESSED M LBS. PER CUBIC
C BLOWS PER FOOT OF PENETRATION USING A
140 LS. HAMMER DROPPING 10 INCHES
• DEPTH AT WHICH UNDISTURBED SAMPLE WAS
EXTRACTED
B DEPTH AT WHICH MSTURSEO SAMPLE WAS
EXTRACTED
• SAMPLING ATTEMPT WITH NO RECOVERY
B BULK SAMPLE
BORING NO. D-1
COOROMATES- E. I0.233.7 N. 7749 '
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
BORING D-4 (CONTINUED)
* 30-
X
IS
POTENTIOMETRIC SURFACE - 4221.V
SURFACE ELEVATION - 4222.3'
"ll,
SP
GM
GRAYISH—BROWN SILT WITH SOME FINE
SANO. MINOR ROOTS
GRAVIS! I BROWII SILT WITH SOME FINE
SANO. MINOR ROOTS
LIGHT GRAY SILTY CLAV WITH SOME
FINE SANO
LIGHT BROWN FINE TO MEDIUM SAND
WITH TRACE COARSE SANO
GRADES WITH GRAVEL
GRAYISH—BROWN FINE TO MEOIUM SAND
DARK GREENISH-GRAY CLAYEY SILT
DARK GREENISH-GRAY SILTY CLAV
INTERLAYERED WITH DARK BROWN
FINE TO MEDIUM SAND
GRADES TO CLAYEY SILT
DARK GRAY FINE SAND TO FINE GRAVEL
WITH TRACE SILT
GRAY COARSE GRAVEL WITH SOME SANO
ANO SILT
GRAVEL ANO COBBLES WITH SAND
LENSES
3CRECRCD INTERVAL
SP
SM
ML
CL
GRADES SANOY
DARK GRAY FINE TO MEOIUM SAND
WITH SOMC SIL". AMO CLAY
GRADES TO SILT
DARK GREENISH-GRAY CLAYEY SILT
DARK GREENISH-GRAY SILTY CLAY WITH
STRINGERS OF FINE SAND
BORING COMPLETED AT li. 5 FEET
ON I - II - tl
COORDINATES N II. 771.2
E II. PS2.1
SET
• C
C BLOWS PER FOOT OF PENETRATION USING A
•40 LB. HAMMER DROPPING 10 INCHES
P SAMPLE HYDRAULICALLY PUSHEO
• DEPTH AT WHICH UNDISTURBEO SAMPLE WAS
EXTRACTED
8 DEPTH AT WHICH DISTURBED SAMPLE WAS
EXTRACTED
LOG OF BORING
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
swtncc (LtvMTioN «ir s; nn
10 *-mum
JOOlt-rZil iC
»—J
BLACK TO DARK BROWN FINE SANO TO
COARSE GRAVEL SOME OIL OR
ASPHALT TRACES 4>ILL)
WATER LEVEL. 7-30-11. AT 1.43 FEET
BROWN TO GRAY FINE SANO AND GRAY
TO SLACK SILTY CLAY. OIL ODOR
GREENISH—4RAV TO SLUE SLACK VAR—
. VED SILTY CLAY
SM BLACK OILY SILTY FINE SAND
;;;; SP
a
ML
ML
CL
SM
ML
SM
SP
CL
SP
SM
SI
LIGHT TO DARK GREENISH-GRAY FINE
SAND WITH TRACE SILT. STRONG
OIL ODOR
UGHT TO DARK GREENISH—GRAY
VARVEO SILTY CLAY
BROWNISH-GRAY TO BLUISH-BLACK
T THINLY LAMINATED CLAYEY SILT
' WITH GRAY MEOUM SAND STRINGERS
GREENISH—GRAY SILTY CLAY
GRAY SILTY FINE TO MEDIUM SANO
GRAY CLAYEY SILT
> GRAY FINE TO MEOIUM SANO WITH SOME
CLAYEY SILT
£ GRAY SILTY FR4E TO MEDIUM SANO
I GRAYISH-BROWN MEOIUM SANO
GREENISH—GRAY VARVED SILTY CLAY
GREEHISH—GRAY MEDIUM SAND
GREENISH-GRAY SILTY FINE SAND
GREENISH-GRAY SILTY CLAY WITH 4
FEW THIN LAYERS OF FME TO
MEDIUM SANO
MOTTLEO BLUISH—GREENISH—GRAY
SILTY CLAY
GREENISH-GRAY SILTY FINE SAND
DARK GREENISH-GRAY SILT WITH TRACE
FINE SAND
BORING COMPLETED AT 00.0 FEET
ON 4 - 20 - 11
GEOPHYSICAL LOG
1 4
z 3D •
T
3
70
I V
It^rTnojJ
NNES-HOORE
HEVRDN WNESt-HOORE
WCVIIDN '
BORING NO. D-2
COORDNATES' E. 9263.2 N 10,750.2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WATER LEVEL
7-29-11
•2.11 FEET ,
SUWACE ELEVATION «2ie it FEET
2tD%-l2j|
10 I
US%-l
20' ±
*ai!
_ ]4<%-ll(fi ll
5M
SM
CL
CL
GM
ML
SM
ML
SM
SH
CL
BROWN S1LTV FINE SAND. MINOR ROOTS
SROWN SILTY FINE SAND
FINE TO COARSE GRAVEL IN WASH
GREENISH-GRAY SILTY FINE SAND WITH
SOME CLAY
GREENISH-GRAY SILTY FINE SANO
GREENISH-GRAY CLAYEY SILT WITH
SOME FINE SAND INTERLAYERS
GREENISH-GRAY 5ILTY CLAY
MOTTLED BLUISH ANO BROWNISH-GRAY
SILTY CLAY WITH SOME FIHE SAND,
BROWN MEDIUM TO COARSE SANO
I POORLY GRADED OVER FINE GRAVEL
TO MEDIUM SAND WITH TRACE SILT
I BROWN FINE ANO COARSE GRAVEL IN
SILTY FINE SANO MATRIX
DARK GRAY SILTY FINE SAND WITH
STRINGERS OF SILTY CLAY
Jlil'IHJl
DARK GREENISH—GRAY SILTY CLAY WITH
SOME FINE SAND
MEDIUM TO FINE SANO
DARK GREENISH—GRAY SILTY CLAY
DARK GREENISHHSRAY CLAYEY SILT
WITH TRACE FINE SANO
GRAY FINE SAND WITH SOME SILT ANO
CLAY
MOTTLED DARK BLUISH—GRAY ANO
BROWNISH-GRAY CLAYEY SILT WITH
TRACE FINE SANO. TRACE SHELL
FRAGMENTS
i
' DARK GREENISH-GRAY SIL'Y FINE SAND
DARK GRAY SILTY FINE TO MEDIUM SAND
DARK GRAY SILTY CLAY
MOTTLED BLUISH AND BROWNISH—GRAV
SILTY FINE SAND
BROWN COMPLETED AT 90.0 FEET
ON A - JO - 11
GEOPHYSICAL LOG
-
J.. . . !
4t>
56
se
I !
Be
es
AOUl
>-3 ,
rPHES-rHHWE
:HEVRON
S-3 tlftHESi-rlODRE CUE, V BOM
mm* «u
•sm.M m
BORING NO. D-3
COORDINATES' N. 11.148.2 E. 11.493.2
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WATER LEVEL
7- 30-• I
SUR'ACE ELEVATION 4210 »» rCXT
32rVll*| 12
10——1
2lOV<n| 31
»—-3—
mm*'
SM
SM
ML
SM
SP
ML
SM
SW
5 43-
69> •
•0-
GW
SP
:=:•:! GP
SP
SP
SP
2tDt-lt»| 66
69——w—
II u
'////.HM.
BLACK »LTV PINE SANO WITH TRACE
MEDIUM SAHO AND COARSE GRAVEL
AT SURFACE PILL)
GREENISH-GRAY SILT AND PINE SAND
WITH SOME CLAY. TRACE ROOT
FRAGMENTS
GREENISH-GRAY SILTY FINE SAND.
TRACE WOOD FRAGMENTS. INTER-
LAYERS OF FRtE TO MEDIUM SAND
GRAY FINE SANOY SILT
GRAY SILTY FINE TO MEOIUM SANO.
TRACE COARSE SAND
BROWN FINE TO CCA RSE SAND. TRACE
FINE GRAVEL
FINE SANO TO COARSE GRAVEL
GREENISH-GRAY FINE TO MEDIUM SAND
WITH SOME COARSE SAND AND TRACE
SILT
GRADES WITH SOME FINE GRAVEL
FINE GRAVEL AND OLA V IN WASH
GRAY FINE TO MEOIUM SAND AND FINE
GRAVEL WITH TRACE SILT
GRADING WITH SOME COARSE SAND
AND TRACE FINE GRAVEL
GRAY MEDIUM TO COARSE SAND WITH
TRACE FINE SAND ANO GRAVEL
GRAY FINE TO COARSE SANO WITH
GRAVEL ANO TRACE SILT
GRADING WITH LAYERS OF CLAYEY
SILTY FINE SANO
GREENISH-GRAY CLAYEY FR4E SAND
SLIGHT GAS ODOR
BLUISH BLACK SILTY CLAY WITH FINE
TO MEOIUM SANO STRINGERS
BORING COMPLETED AT W.S FEET
ON 3 — 6 — 01
GEOPHYSICAL LOG
—4-
•r~i
t
r "EHMES-MODRE ! ewyawi— UVUtBH L
tr—l
BORING NO. D-5
COORDINATES' E. 12.718.9 N. 9974 3
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
SEQ. I
SMC4MMG STRENGTH AlHO rRKTlONAU.
xcaisrsiNce tN LBS./so. rr.
joeo eooe sooo JOOO JOOO eooo >eoo
I
yoo-exex-9i.7
iieo-iT.3X-a€.e mmm
iioo.ja.cx-M.e
ooo-jt/n-eoj
IOOO-JJS r.-ee.i
JO
ijso-jeor.-teo
eeoo-jo a V. -SJ 7
£9O0-t/4 X-/04J
jzoo-is.s 1 11 1 —• papal _ — so
J300- 44 /7. -ZO£ I
JOOO-ft 47.-11/ I
4ioo-ze.a z-07.
m
4400-£3 7X-90I
3000-eS.0r.3J 4 CO SBS9S
3300-1747.-»6 J
Q 90 3S30-J7J7.-a*.« I J
no SOSO-J3 77.-03 o
eiso-"ax-iuo
iro eeoo-3S4r.-9o 7
I
643o-j7 9r.-aee
leX?
Jio-j4 ix-a7o
7C304S 7 7.-970
79SO-to37.-1070
IOOO-J4 7K-S7I 140
3000-3J ir.-470
tOOO-JOOX 34 S
/SO 3000-27 3 V.-93 *
CLCVATIQN 4233 (USCttS LUTON)
AWC*VV to*/*
SILTY LOAM
WATtP ItrtL 127-48
6*Ar n»c SANO
,'3\ (C£MCNTCO SANO ANO 0>A¥CL)
STACKS or »wr sury CIAT LOAM ANO
DMC SANO
o*Ar CLAY fsorr)
GAAVnNC SANO
GAAY CLAf WTM STBtAKS or CAAY
rmc TO MCDHJM SANO
CAAY MCOHJM TO COAKSC SANO
ANO GBAVfL
{/NOUAATCO COAASC SANO ANO OAAYLX)
GBAOINO ro
H £4VK rtr/£ SANO IYITM LAMINATIONS
or ste 7
CffAy CLAV fi-roocnATCi r rurM
ro n»M)
OBAOIHG TO
LAMINA r/ONS OT G*AY rTNt SANO
GAAV LOAM
GBAY r*v£ SANO
CfAf CCAV .•MOOCPATfLr nun)
rUNSOfGBAY Mr MUM SANO)
( THIN LAMINATIONS OT riNC SANO
ANOS'LT)
GAAY r/NC SANO
G0C£N/SN -G0AV CLAf *V/TH WNIT£
tlMC INCLUSIONS ffMTM)
1TN/N LAMINA7. ONS Or.VLTJ
GAALVNG rO
LAM/NATIONS Or y riN£ SANO
ZtffOtVNlSH CAAv ''NC SANO
' 1 ' ' ' ' I ' ' ' ' I ' ' ' ' I ' ' ' '
20000 13000 /oooo 3000 o
SLZAWMJO K4LUC X*V LOS./SQ f~T.
LOG OF BORINGS
REFER TO TABL* A-2
FOR ORIGINAL. •ORIHO
NUMMR ANO REPORT
REFERENCE DAMES * MOORE
FOUNDATION ENGINEER*
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
BORING O-IO
ELEVATION 4217 01 FEET
J2 J_
« 34-
Z &
g
39>%-*OfJ P
CL
CL
ML
SM
CL
BROWNISH-GRAY GRAVEL. SANO. SIL.S.
ANO CLAY FILL)
WATER LEVEL AT 2.10 FEET CM 11-10-01
GREENISH-GRAY SILTY CLAY WITH
TRACE FINE SANO
BROWNISH-GRAY CLAY WITH TRACE
SILT ANO SANO
BLACK MOTTLING BETWEEN I.S
TO 10.3 FEET, CHEMICAL OOOR
GRADES WITH SOME SILT
BLUISH-GRAY SILT WITH SOME CLAY
AND FINE 5AN0. MICA PRESENT
BLUISH-GRAY FINE SANO WITH SOME
SILT AND CLAY. MICA PRESENT
GRADES WITH TRACE SILT AND
CLAY
BLUISH—GRAY CLAY
GRADES WITH GREENISH—GRAY
CLAY WITH SOME SILT
GRADES WITH TRACE FINE SANO
GRADES WITH SOME FINE SAND
GRADES WITH SILTY CLAY 1
TRACE FINE SANO
(CONTINUED)
CL
• I*
SP • 100/2
3 CL
• 20
ML
2«.2%-IOia so
i«a
J
BROWNISH-GRAY FINE TO MEORIM SANO <l Kl U
GRAY SILTY CLAY. MICA PRESENT |j
Ol
ul
ul
BLUISH-GRAY CLAYEY SILT WITH SOME
FINE SAND
GRADES TO FINE SANDY SILT
BORING COMPLET EO AT 07.0 FEET
ON 11-4-01
COORDINATES • N 1305.1
E 0700.4
LOG OF BORING
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
BORING D-11 (CONTINUED)
ELEVATION 4217 3* FECT
* 55-
ML
CL
SM
CL
CL
BROWNISH-GRAY GRAVEL, SANO. SILTS,
AND CLAY
WATER LEVEL AT I.OOFCET ON ll-IO-OI
GREENISH-GRAY PINE SANDY SILT
TRACE OF CLAY, MICA PRESENT
•LACK MOTTLING ANO CHEMICAL
OOOR BETWEEN 3.0 AND 17.0 FEET
GREENISH-GRAY SILT WITH SOME FINE
SAND. TRACE OF CLAY
GRAY SILT WITH SOME FINE SAND ANO
CLAY
DARK GRAY CLAY WITH TRACE SILT
BROWNISH-GRAY FINE SAND WITH SOME
SILT AND CLAY
BLUISH-GRAY CLAY WITH SOME SILT
GRAY CLAY WITH SOME SILT
52 3-%-UG 16 •3 GRAOCS TO SILTY CLAY
GRADES WITH TRACE FINE SANO
1
GRAY CLAYEY SILT WITH TRACE FINE
SANO
GRADES TO SILT WITH SOME
FINE SANO
BORING COMPLETED AT IU.SFEET
ON 11 — 5 — 01
COORDINATES • N IMS.2
E (131.0
J
LOG OF BORING
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WELL
CONSTRUCTION
BORING D-28
ELEVATION
WELL
CONSTRUCTION
CL
CL
BROWN CLAYEY SILT. ROOTS. MOIST-. MEDIUM STIFF (TOPSOIL!
FLIGHT GRAY SILT WITH TRACE FINE SAND. VARVED. SILTY CLAY ANO SANOY SILT LENSES. WET-SOFT
LIGHT GRAY TO GRAY SILTY CLAY WITH
SOME CLAYEY SILT AND FINE SANDY
SILT LENSES WITH RUST COLORED
MOTTLING. WET - SOFT TO MEDIUM
STIFF
GRAY FINE TO MEOIUM SANO WITH SOME
SILTY FINE SANC LENSES. WET -
MEDIUM DENSE
GRAY SILTY CLAY WITH OCCASIONAL
CLAYEY SILT ANO SANCY SILT LENSES.
WET - MEOIUM STIFF
GRADES DARK GRAY IN COLOR
WITH LITTLE OR NO SANDY SILT
LENSES
to—
a 23 SM-
ML
a sr
CL
or
rao
BORING D-28 (CONTINUED)
ELEVATION
\
DARK GRAY SILTY FINE SAND. WET —
MEOIUM DENSE
GRAY TO DARK GRAY SILTY CLAY-
CLAYEY SILT WITH SANCY SILT AND
SILTY SAND LENSES. WET - MEDIUM
STIFF
GRADES WITH A SILTY FINE SANO
LAYER AT 71.0 FEET
GRAY SILTY CLAY. WET - STIFF
LIGHT GRAY SILTY FINE SAND-FINE
SANOY SILT. WET - MEDIUM DENSE
GRADES WITH SOME CLAY
LIGHT GRAY SILTY CLAY WITH SOME
CLAYEY SILT LENSES. WET -
MEDIUM STIFF
BORR4G COMPLETED AT 102.0 FEET
ON 11-10-04.
KEY TO PIEZOMETER CONSTRUCTION
• SM'PA socruxAo
•YC +»\
-•tflTOMIt SLIP**
•vc *PC air* 0O0-4CM
icon ANO mm WM»
n
KEY TO SWIWC
SAMPLWG TYPE -v m %y— •LOW COUNTS
s)JX*»M
FIELD MOISTURE -»* DRY OENSITY
SAMPLRsC TYPES ANO SLOW COUNTS
•« m* o« - u TYPE SAMPLES ANO MUMSER or SLOWS
REOUMEO TO OPivC SAMPLER ONE rOOT
USPsS A 1« POUND HAMMER ORO»****S »
HCHES tP4 MOPCATCS THAT A THM WALL.CO
CXTENS*ON *MS ATTACHED TO THE U TYPE
SAMPLER ANO WAS PUSHED TO OBTASN
RCCOVOTY or SAMPLE
OCNOTCS SAMPLPIG ATTEMPT WITH HO
RECOVERY
OCNOTCS WOSnMSEO SAMPLE
at ... - SPLIT SPOON SAMPLER
' OCNOTCS OISTURBCO SAMPLE AHO IWPSSCR
OP SLOWS SEOUMED TO ORIVE SAMPLCR OMC
FOOT UStsfiA l *S POUND HAMMER OROPPf«
» PsCMES
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WELL
CONSTRUCTION
BORING D-33
! i
Z«0—
0-&
WELL
CONSTRUCTION
BORING D-33 (CONTINUED)
CL
SM
ML
ML
CL
SM-
ML
CT
BROWNISH-GRAY TO LIGHT GRAY CLAYEY
SILT WITH SILTY CLAY ANO SANDY SILT
LENSES. MOIST - MEOIUM STIFF
OLIVE GRAY SILTY CLAY WITH CLAYEY
SILT ANO SANCY SILT LENSES. WET —
MEDIUM STIFF
GRAY TO DARK GRAY SILTY CLAY. WET -
SOFT
GRADES CARP GRAY IN COLOR
WITH OCCASIONAL FINE SAND
LENSES
Z
ft 95-
GRADES GRAY IN COLOR
GRADES WITH OCCASIONAL SILTY
FINE SANC LENSES
GRAY SILTY FINE SANO-FINE SANDY
SILT. WET — LOOSE
GRAY SILTY CLAY-CLAYEY SILT WITH
OCCASIONAL SILTY FINE SAND AND
SANOY SILT LENSES. WET-SOFT
GRAY CLAYEY SILT WITH SANDY SILT
LENSES. WET-MECIUM STIFF
GRAY SILTY CLAY WITH OCCASIONAL
SANOY SILT AND CLAYEY SILT
LENSES. WET - SOFT
SANDY SILT LENSES GRADE OUT
GRAY SILTY FINE SAND ANO FINE SANDY
SILT WITH CLAYEY SILT ANO SILTY
CLAY LENSES. VARVED, WET - LOOSE
DARK GRAY SILTY CLAY WITH OCCASIONAL
CLAYEY SILT SEAMS. WET - MEDIUM
STIFF TO STIFF
LU
as CL
BIS
i
SM
a 20
CL
GRAY SILTY CLAY WITH SOME CLAYEY
SILT. WET - STIFF
GRADES WITH OCCASIONAL SILTY
FINE TO MEOIUM SAND AND SANDY
SILT LENSES AND LAYERS AT 14.0
TO IS. 3 FEET
GRADES WITH SILTY FINE TO
MEDIUM SAND LAYER AT 90.5
TO9I.0 FEET
GRAY SILTY FINE TO MEDIUM SANO. WET-
MEDIUM DENSE
GREENISH-GRAY TO GRAY SILTY CLAY
WITH CLAYEY SILT. WET - STIFF
GRADES WITH SILTY SAND LAYER
AT 100.0 TO 101. S FEET
BORING COMPLETED AT 101.9 FEET
CN 11-77-04.
KEY TO PIEZOMETEII CONSTRUCTION
W- ••O Csw
••CUFILL
GRAY PINE TO MEDIUM SAND WITH SOME
5IL.T AND WITH OCCASIONAL SILTY
CLAY LENSES. WET - LOOSE
»-v«c p*t WITN OTC-OMCM
SLOTS M0 s***' *•*»»
KEY TO SfliyPLWC
SAMPLMG TYPC ^ ^s— SLOW COUNTS
ifrtb- M
PiCLO MMSTURC "•— ©*V OCMStTV
SAMPLS1G TVPCS ANO SLOW COUNTS
«« *r C* - U TYPE SAMPLH ANO NUMBCS OP SLOWS
sTCOUMCD TO mivt SAMPLO* ONC POOT
USMS A >«• POUND HRMMIR tmcr+mc »
SMCMCS t*4 MOWATCS THAT A TH«t WALLCO
| OCT INS (ON WAS ATTACMCO TO TMC U TVPC
| SAMPLW AND WAS PUSMCDTOOSTAM
SCCOVfJtT OP SAMPLC
| •• OCNOTCS SAMPLMG ATTCMPT WITH PM
I ACCOVCPT
L • OCNOTCS IMMTUPPBCD SAMPLC
31 SPLIT SPOON SAMPLC*
• OCNOTCS OJSTURwCO SAMPLC ANO NUMSCIt
OP SLOWS ftCOUMCO To CPiVt SAMPLCR ONC
POOT US MCA t« POUNOMAMMCR OROPPtMC
X MCMCS
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
WELL
CCMSTrftJCTION
BORING
ELEVATION I
D-35
COORDINATES N 11620.I
E 12917.3
Z 40—
• •37
CL
• 20
1 •racy
ML
SM
GM
SM
SP
DARK BROWN CLAYEY SILT WITH TRACE
FINE SAND - TRACE ORGANICS TO
10 INCHES - STIFF
BROWN CLAYEY SILT WITH TRACE FINE
SAND - INTERLAY ER SEQUENCES OF
SILTY FINE SAND - STIFF
WATER LEVEL AT 6. 1 FEET ON 3-9-04
GRADING WITH LAYERS OF SILTY
FINE SAND - 1/1" TO 3/6- IN
THICKNESS
BROWN SILTY FINE TO COARSE SANO
ANO GRAVEL - DENSE
DARK GRAY SO.TV CLAY - MEDIUM
STIFF
GRAOING WITH 110 " STRINGERS
OF SILTY FINE SANO
GRADING WITH TRACE FINE SAND
GRADES WITH I.S- TO 2- LAYERS
OF SILTY FINE SAND
GRAY SILTY FINE SANO - MEDIUM
DENSE
GRAY FINE TO COARSE SANO AND GRAVEL
WITH TRACE SILT - VERY DENSE
GRAOING WITH LAYERS OF FINE
TO COARSE SAND
GRAY FINE TO COARSE SANO WITH TRACE
FINEANDCOARSEGRAVELANOSILT -
VERY DENSE
GRAY SILTY CLAY WITH OCCASIONAL
STRINGERS OF SILTY FINE SAND -
STIFF
BORING COMPLETED AT 7C.0 FEET
ON 3-10-14
00'
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
CCMSmutTION
BORING D-36
ELEVATION
(y](_ LIGHT GRAY SILT WITH SOME FINE SAND
AHO TRACE CLAY. MOIST - SOFT
LIGHT GRAY CLAYEY SILT WITH SILTY
FINE SANO. SANOY SILT ANC SILTY
CLAY LENSES. VARVED. WET-SOFT
GRADES GRAY IN COLOR WITH
RUST COLORED MOTTLING
CL
BE
O II ML
CL
SM
DARK GRAY SILTY CLAY WITH OCCA -
SIONAL CLAYEY SILT ANO SILT
LENSES. WET - VERY SOFT
GRADES GRAY IN COLOR
DARK GRAY TO BLACK SILTY CLAY-
CLAYEY SILT. WET - SOFT
GRAY CLAYEY SILT WITH SANOY SILT.
SILTY FINE SAND AND SILTY CLAY
LENSES. VARVEO. WET - SOFT
GRAY SILTY FINE SAND- FINE SANOY
SILT. WET - LOOSE
GRAY SILTY CLAY —CLAYEY SILT WITH
SOME SILTY FINE SANO AND SANDY
SILT LENSES
GRAY SILTY FINE SAND. WET - MEDIUM
DENSE
LGRAY SILTY CLAY — CLAYEY SILT WITH
SILTY FINE SANO AND SANOY SILT
LENSES, WET - SOFT
GRADES WITH 15 INCH SILTY FINE
SAND—SANDY SILT LAYER
DARK GRAY SILTY CLAY-CLAYEY SILT.
WET - SOFT
GRADES GRAY IN COLOR
GRADES MEDIUM STIFF
GRAY FINE SANOY SILT WITH CLAYEY
SILT LENSES. WET — LOOSE
GRAY TO DARK GRAY SILTY CLAY WITH
OCCASIONAL CLAYEY SILT LENSES.
WET - MECIUM STIFF
GRAY SILTY FINE SAND. WET - MEDIUM
DENSE
GRAY SILTY CLAY. WET - MEOIUM STIFF
OBSTRUCTION
BORING D-36 (CONTINUED)
ELEVATION
ss
B 7
uj SO—
as
1 ML Big
-1 100
• 29
GRADES WITH CLAYEY SILT ZONES
GRACES DARK GRAY IN COLOR
GRAY SILT WITH SOME CLAY. WET-
STIFF
GRADES WITH SOME FINE SANO
BORING COMPLETED AT 101. 5 FEET
ON 11-20-04.
KEY TO PIEZOMETER CONSTRuqiOW
T3_ Vs' CH* SCMC0UU1 *o
•vc p*e
MMTOsfTt «jJ»»TT
I — t/r-2 DUL SCHCOUU *tl
fvc ***** WITH OOKJ-ss
1 U J ILOT1 MO sWfl 1—
KEY TO SAILING
SAMPLtNC TYPE m BLOW COUNTS
«i%-«X
FlCLO »»»0«fTIJslC -"' ^ DPTY 0O4ITY
SAMPVMS TVPCS ANO BLOW COUNTS
•*WOt- U TYt»C SAMPLC*. ANO NUMSC* OT SLOWS-
I RCOUMCO TO 0MVC SAM PI. CM ONC FOOT
1 j USMB A \m t*OUND HAMMV ORCP***Ma »
PNCNCS (P# MWCATCS THAT A TNlN WALLCD
| CXTIKSsON WA» ATTACHCOTOTMC UTYPT
J SAMPLO) MO <U> PU9HCD TO OtTAM
| NtCOVCHY Of SAMPLC
I • OCNOTCS SAMPLbTNC ATTCMPT WITH NO
j NCCOVCP.V
1 — • - OCNOTCS UNOtSTUNSCO SAMPLC
OP BLOWS RCOUWCO TO DPIVC SAMPLC* ONC
FOOT UCtfi A l« POUND HAMsACR DMOPPASO
JD PICMCS
LOG OF BORINGS
Dames & Moore
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
APPENDIX C
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
APPENDIX C
AQUIFER TEST ANALYSIS METHODS
EarthFax Engineering, Inc.
AQUIFER TEST ANALYSIS METHODS
IN SUPPORT OF MODELING INVESTIGATIONS
CHEVRON PRODUCTS COMPANY
Salt Lake Refinery
Salt Lake City, Utah
Prepared by
EARTHFAX ENGINEERING, INC.
Midvale, Utah
December 1996
Chevron Products Company
Salt Lake Refinery
Appendix C
Aquifer Test Analysis
December 1996
TABLE OF CONTENTS
Section Page
C.1 - METHODOLOGY C-1
C.2 - REFERENCE CITED C-1
LIST OF TABLES
TABLE C-1 Summary of Hydraulic Conductivities from Unconfined Aquifer
Slug Tests C-2
LIST OF FIGURES
FIGURE C-1 Location of Slug-Tested Wells
LIST OF ATTACHMENTS
ATTACHMENT A SLUG-TEST ANALYSES
C-ii EarthFax Engineering. Inc.
Chevron Products Company
Salt Lake Refinery
Appendix C
Aquifer Test Analysis
December 1996
APPENDIX C
AQUIFER TEST ANALYSIS METHODS
IN SUPPORT OF MODELING INVESTIGATIONS
C.1 METHODOLOGY
In support of the 1996 groundwater flow and contaminant transport modeling
investigation of the Chevron Salt Lake Refinery, 17 wells were slug tested. The methods
used to perform the slug tests and analyze the results were the same as described for a slug
test in Appendix C of the 1992 flow model report (EarthFax Engineering, 1992). The purpose
of this appendix is to provide information regarding the location of the slug tested wells and
to present the results. Figure C-1 shows the location of slug tested wells while Table C-1
contains the results of the slug testing. Attachment A of this appendix contains the slug test
analyses.
C.2 REFERENCE CITED
EarthFax Engineering, Inc. 1992. Spring 1992 Steady-State Groundwater Flow Model.
Prepared for Chevron U.S.A., Salt Lake Refinery. EarthFax Engineering, Inc. Salt Lake
City, Utah.
C-1 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix C
Aquifer Test Analysis
December 1996
TABLE C-1
SUMMARY OF HYDRAULIC CONDUCTIVITIES
FROM UNCONFINED AQUIFER SLUG TESTS
WELL NO.
SLUG-INJECTION TEST SLUG-WITHDRAWAL
ft/min ft/day ft/min ft/day
RWMA-1 0.00048 0.58 0.0009 1.30
RWMA-2A 0.0028 4.03 0.0033 4.75
RWMA-3 0.0028 4.03 0.0015 2.16
RWMA-4 0.002 2.88 0.00087 1.15
RWMA-5 0.00212 3.02 0.00232 3.31
RWMA-6 0.0018 2.59 0.00074 1.01
TEL-2 0.0013 1.87 0.0015 2.16
TEL-3 0.0032 4.61 0.0027 3.89
WFP-1 0.00055 0.72 0.00049 0.58
WFP-2 0.0014 2.02 0.0023 3.31
WFP-3 0.00086 1.15 0.00091 1.30
WFP-4 0.00032 0.43 0.00085 1.15
WFP-5 0.0015 2.16 0.0013 1.87
WFP-6 0.00098 1.30 0.0008 1.15
WFP-7 0.00026 0.29 0.0003 0.43
WFP-8 0.00025 0.29 0.00032 0.43
WFP-.QA O 00? ? aa 4 IB
C-2 EarthFax Engineering, Inc.
Chevron Products Company Appendix C
Salt Lake Refinery Aquifer Test Analysis
December 1996
ATTACHMENT A
SLUG-TEST ANALYSES
EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP1-SL.AQT
WFP-1 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
14.89
2.843
1355
0.083
0.359
14.89
15
0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 5.5087E-004 +/- 3.4893E-005
y0 = 1.0249E+000 +/- 8.5562E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 13
Number of estimated parameters.... 2
Degrees of freedom 11
Residual mean 9.013E-006
Residual standard deviation 0.01083
Residual variance 0.0001173
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
±3
0)
0
rf
p-i
ft
«
•H
P
WFP-1 SLUG TEST CHEVRON
10* H-M ! I 11 i 11 i i i 11 11 i 11 I i i I! 11 111 i I I i M ! II! I i I i I ! I !
K = 0.0005509 ft/hin
L y0 = 1.025 ft
0,1 S2 05
I i
AQTESOLV
GERftCHTY
ft MILLER, INC.
• Modeling Group
Q [H " 1 ^"I 'i HI ii ill II in n ni n II
'*'~~0* 4,6 9,2 13,8 18,4 23
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP1-BL.AQT
Data set title WFP-1 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 419
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 14.89
Well screen length 15
Static height of water in well 14.89
Log(Re/Rw) 2.843
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 4.9649E-004 +/- 1.7378E-005
y0 = 1.0300E+000 +/- 4.9576E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 14
Number of estimated parameters.... 2
Degrees of freedom 12
Residual mean 3.201E-006
Residual standard deviation 0.006021
Residual variance 3.626E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
I 1
4J
c
fl
0
d
1—1
ft
B
•H
•
WFP-1 BAIL TEST CHEVRON
;i ii iii I! Ill i ii M i I j M 11 I! I 11 | i i i I i i i i 11 11 I i I I
i
K = 0.8004965 ft/nii,
yO = 1.03 ft
0.1
0,001 1 I I I I I I I I I I I I I I I I I I I I I I I I ! I I I I I I I I I I I I
n. < 4.2 "i h _.- f* ».-
AQTESOLV
GERAGHTY
& MILLER, INC.
Modeling Group
ume i mm i Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set S-30RSLT.DAT
Data set title S-3 0 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 923
Radius of well casing 0.083
Radius of well 0.2083
Aquifer saturated thickness 10.97
Well screen length 11
Static height of water in well 10.97
Log(Re/Rw) 3.036
A, B, C 0.000, 0.000, 2.738
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 8.5971E-004 +/- 1.7977E-005
y0 = 1.2453E+000 +/- 1.0620E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 50
Number of estimated parameters.... 2
Degrees of freedom 48
Residual mean 0.0004978
Residual standard deviation 0.02535
Residual variance 0.0006427
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
s
^—I
d
r-i
O
ft
CO
•rH
Q
30
10
SLUG TEST CHEVRON
m MIN II MI M
i
II |ii II in II
K = O.0008155 ft/Min
yO = 1.22 ft
IIII MMIIIIIH
0.1
0,0 1 m
o
o m
II M Ml I I MM LUJ
AQTESOLV
GERAGHTV
MILLER, INC.
Mode 1 insr Group
6,4 9.612.816,
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set S-30BL.AQT
Data set title S-30 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 746
Radius of well casing 0.083
Radius of well 0.2083
Aquifer saturated thickness 10.97
Well screen length 11
Static height of water in well 10.97
Log (Re/Rw) 3.036
A, B, C 0.000, 0.000, 2.738
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.4095E-003 +/- 9.0469E-006
yO = 1.4317E+000 +/- 3.8829E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 38
Number of estimated parameters.... 2
Degrees of freedom 36
Residual mean 0.0002444
Residual standard deviation 0.009322
Residual variance 8.691E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
S-30 BAIL TEST CHEVRON
10.
CD
0>
H-I I!! 11 1111II11 11 111 11 III111
K = e.00141 ft/Min
tjO = 1.432 ft
1.
0.1
0.01
III i "HI
mum 1111 n 1111111 i
AQTESOLV
GERAGHTV
MILLER, INC.
Model in? Group
° 6 5.2 7.810,413.
T i rn e {in i EL )
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
RWMA6-BL.AQT
RWMA-6 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
9.701
2.564
0.083
0.359
9.701
15
280
0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 7.4198E-004 +/- 2.2213E-005
y0 = 1.5288E+000 +/- 6.6396E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual =* residual * weight
Weighted Residual Statistics:
Number of residuals 12
Number of estimated parameters.... 2
Degrees of freedom 10
Residual mean 5.906E-006
Residual standard deviation 0.01001
Residual variance 0.0001001
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
t
d
H
fl
•H
P
RWMA-6 BAIL TEST CHEVRON
10 be 11! Mill III li Ml l! Ml III l! I! Ill III il il III ill li ltd
d o.l
o.oi
K = 0.080742 ft/min
y8 = 1.529 ft
0 S
0,001 m
I I A
II III II III II III II III III II II III Mill 11 111 111 II li
1 1
/ 3, 4^
Time (min)
Chevron Products Company
Salt Lake Refinery
AQTESOLY
GERAGHTY
& MILLER, INC.
BModeling Group
EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA6-SL.AQT
Data set title RWMA-6 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 389
Radius of well casing 0.083
Radius of well 0.3 59
Aquifer saturated thickness 9.701
Well screen length 15
Static height of water in well 9.701
Log (Re/Rw) 2.564
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.8014E-003 +/- 2.3155E-004
y0 = 8.8951E-001 +/- 3.9207E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 11
Number of estimated parameters.... 2
Degrees of freedom 9
Residual mean 0.0003758
Residual standard deviation 0.04242
Residual variance 0.0018
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TO
RWMA-6 SLUG TI
? 0.01 ir
n nn i J
[J.
M j I ! ! i i
M0
( I I! I i! i i | i i !! ! j i i i
0.001801 ft/Hin
0.8895 ft
I i ! 1! ! i ! I I i 1 1
i .4
T1 ]"n P ! T>
Chevron Products Company
Salt Lake Refinery
Jffn\ MILLER, INC.
Hi Mode ling Group
EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA4-BL.AQT
Data set title RWMA-4 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 603
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 10.97
Well screen length 15
Static height of water in well 10.97
Log(Re/Rw) 2.645
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 8.7322E-004 +/- 4.9798E-005
y0 = 1.3785E+000 +/- 1.9859E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 2 0
Number of estimated parameters.... 2
Degrees of freedom 18
Residual mean 0.0001914
Residual standard deviation 0.03754
Residual variance 0.001409
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
d
a)
d
0
cd
ft
09
•H
RWMA-4 BAIL TEST CHEVRON
10, r4lllil!ll j!l!lllMl|lll!MhljlMl!!l!l|!l!hl!;M
r K = 0.0888732 ft/min
y0 = 1.379 ft
0,1
on
0,01 mi 1111 I
0.
(gig j:
II II In m II II In II in n
4-4 RR B R
A v X V.-- * V.' v \J
Time (min)
i !
! 1
AQTESOLV
GERAGHTY
ft MILLER, INC.
Hi Model ing Group
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA4-SL.AQT
Data set title RWMA-4 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 458
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 10.97
Well screen length 15
Static height of water in well 10.97
Log (Re/Rw) 2.645
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 2.0167E-003 +/- 2.0866E-004
y0 = 5.3827E-001 +/- 1.8994E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 12
Number of estimated parameters.... 2
Degrees of freedom 10
Residual mean 0.0003527
Residual standard deviation 0.02545
Residual variance 0.0006477
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
RfMA-4 SLUG TEST CHEVRON
±3
i
Lj
Qji
d
\ i
rj
i
eg
ft
ii i i i i i ! i ! i i i i 1 i I I i i I ! i i i ! i ! i | iI i i I i i j i j i i !
!!I ! " '
K = 0.002017 ft/Hin
yO = 0.5383 ft
n
n.ni
i i i i
ii II! IUM ill 11 II! li Mi ii Ml II 111 IM II ii ill II Mi li
AQTESOLY
GERAGHTY
& MILLER, INC.
Modeling Group
Tl, l.fi 3.?. 4B fi.4
T1 m P» (TYi 1 ^
t I I J i «tsil:::.'
n
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP8-BL.AQT
WFP-8 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
16.45
2.968
737
0.083
0.3333
16.45
15
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 3.1653E-004 +/- 4.3085E-005
y0 = 1.1856E+000 +/- 2.3394E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 27
Number of estimated parameters.... 2
Degrees of freedom 25
Residual mean 3.404E-005
Residual standard deviation 0.04389
Residual variance 0.001927
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
d
g
o
r-l
ft
w
•H
P
IFP-8 BAIL TEST CHEVRON
4ll!llll!|llll!!ll!|l!lllllll|lllll!lll|llllllllj-
K = 0.0003165 ft/nin
L H0 = 1.186 ft
1.
0,1
0.01
EL.
LUJ LUJJ LUJ ill
"0
Chevron Products Company
Salt Lake Refinery
8 -
mil H
AQTESOLV
GERAGHTV
& MILLER, INC.
• Modeling Group
2.6 5.2 7.8 10.4
Time (min)
1 T
! 1 J
EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP4-SL.AQT
Data set title WFP-4 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 852
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 14.47
Well screen length 15
Static height of water in well 14.47
Log (Re/Rw) 2.825
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 3.1593E-004 +/- 1.9650E-005
y0 = 1.0222E+000 +/- 1.1000E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 23
Number of estimated parameters.... 2
Degrees of freedom 21
Residual mean 9.483E-006
Residual standard deviation 0.01381
Residual variance 0.0001908
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
u
w
d
S
_i
ft
•H
P
IFP-4 SLUG TEST CHEVRON
ttllllllll|lllll!lll|lllllllil|ll!llllll!!IM!iim
- K = 0.80B3159 ft/min
- yB = 1.022 ft
1
0,1
0,01
3=
mnmiliiiimiiimimiikimimliiiimii
AQTESOLV
GERAGHTY
MILLER, INC.
• Modeling Group
0. 1 ^
Ik* in,.
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP4-BL.AQT
WFP-4 BAIL TEST
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
14.47
2.825
1280
0.083
0.359
14.47
15
0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 8.4923E-004 +/- 8.9020E-005
y0 = 1.3793E+000 +/- 4.8180E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 29
Number of estimated parameters.... 2
Degrees of freedom 27
Residual mean 0.00091
Residual standard deviation 0.0993
Residual variance 0.00986
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
4-1
1
d
'6
H
d
ri
ft
CO
•H
P
WFP-4 BAIL TEST
10 [41 (MINI lllhliMhlllilihltllllhiMhlihiim
- K = 0.8008492 ft/Hin
- y0 = 1.379 ft
1
n i
U 4 ±
0.01
^ o
AQTESOLV
M GERAGHTY
& MILLER, INC.
• Modeling Group
11 II III 8,1 Ml II UMI MM I III III II II !li li lil II
0. 4,4 8.8 13,2 17.6 22
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA1-SL.AQT
Data set title RWMA-1 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 713
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 12.84
Well screen length 15.5
Static height of water in well 12.84
Log(Re/Rw) 2.753
A, B, C 0.000, 0.000, 2.405
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 4.8571E-004 +/- 1.9424E-005
y0 = 4.6351E-001 +/- 3.7274E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 19
Number of estimated parameters.... 2
Degrees of freedom 17
Residual mean 3.681E-006
Residual standard deviation 0.004787
Residual variance 2.291E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
RWMA-1 SLUG TEST CHEVRON
10,
• u
fl I
r.
'. i
ra
f=-i
fl
GO
•H
D
r+l I! Mi I! iiMMM II j!! iii II il |M lit ll M jiMM ii i:
: K
- yB
n i
run
0.0004823 ft/Min
0.4628 ft
U i M H i M M I 11^ M II i 11 II I i I 11 i II II I i i i i 1 li
AQTESOLV
GERAGHTY
& MILLER, INC.
Modeling Group
"fl n A A Q
i I
rr P R 1 ?
Time lmin)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set RWMA1-BL.AQT
Data set title RWMA-1 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 864
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 12.84
Well screen length 15.5
Static height of water in well 12.84
Log(Re/Rw) 2.753
A, B, C 0.000, 0.000, 2.405
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 8.9963E-004 +/- 1.2465E-005
y0 = 1.4689E+000 +/- 3.6488E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 13
Number of estimated parameters.... 2
Degrees of freedom 11
Residual mean 1.29E-005
Residual standard deviation 0.005649
Residual variance 3.191E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
u
<1j
ft
ffl
n
RWMA-1 BAIL TEST CHEVRON
•i n
> : i—
:i 11 III ! I | i i ! I i I M ! j I i I! 11! I i | i I I! I! I I j | i I M I i I i P
- K = 0.0008952 ft/min
yO = 1.468 ft
f) J
n n j
1 = i. i r I
iHininn.iiimniniiinmiinnnii
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Model ing Group
Tl ,1,. n. i O
\ Li
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set WFP2-SL.AQT
Data set title WFP-2 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 825
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 12.18
Well screen length 15
Static height of water in well 12.18
Log(Re/Rw) 2.774
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.4927E-003 +/- 5.2990E-005
y0 = 5.3435E-001 +/- 9.3104E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 21
Number of estimated parameters.... 2
Degrees of freedom 19
Residual mean 0.0002163
Residual standard deviation 0.01172
Residual variance 0.0001374
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
Qj
1
.* 1
a
i
5 ft
w
WFP-2 SLUG TEST CHEVRON
1* kl M Ill !i |il HI ll If |!l M Ill li |li ill li li j M I!! !! It
r K = 0.001421 ft/nin
y0 = 0.5216 ft
n 1
« U,ul
0,001
u u
n
u.
111111n11 i1111111111111111 li 1111111111111 II 111
r— «~% 7—k t
Time (min)
AQTESOLV
GERAGHTY
& MILLER, INC.
Modeling Group
n o
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP2-BL.AQT
Data set title WFP-2 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 439
Radius of well casing 0.083
Radius of well 0.33 33
Aquifer saturated thickness 12.18
Well screen length 15
Static height of water in well 12.18
Log (Re/Rw) 2.774
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K « 2.5687E-003 +/- 4.7258E-005
y0 = 1.3068E+000 +/- 1.5856E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 32
Number of estimated parameters.... 2
Degrees of freedom 3 0
Residual mean 0.003937
Residual standard deviation 0.02688
Residual variance 0.0007224
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
d
a)
o
ri
r-l
ft
w
•H
f FP-2 BAIL TEST CHEVRON
10. p:MIMIM|!!|l!lll!|!MI!lM! jhhMMt Mill!!! ihj
h K = 0.002298 ft/Min
yO = 1.203 ft
0.1
0.01
0,001m
0 4
io oo o
fD
S 0 AQTESOLV
GERAGHTY
a MILLER, INC.
Hi Model ing Group
1111111\111111111111111111111u iI 111 II
L6 342 4>B 64+ 84
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, inc.
TEST DESCRIPTION
Data set WFP3-SL.AQT
Data set title WFP-3 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 1420
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 14.01
Well screen length 15
Static height of water in well 14.01
Log (Re/Rw) 2.865
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 9.1069E-004 +/- 7.0656E-005
y0 = 1.1756E+000 +/- 2.4118E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 22
Number of estimated parameters.... 2
Degrees of freedom 2 0
Residual mean 0.0002813
Residual standard deviation 0.04771
Residual variance 0.002276
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
WFP-3 SLUG TEST CHEVRON
II
I ;
i
li i
.•—I
H
J.! ! M i I i i 11 i ! ! j! I ! ! J! i i! i !! !! j!! ! ! i ! i i ! | i ! i i! j i !L
- K = 0.0008558 ft/Min
yO = 1.157 ft
! I
4..R JJ.R 14.4 IP..?
Time (min)
AQTESOLV
GERAGHTV
& MILLER, INC.
Modeling Group
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP3-BL.AQT
WFP-3 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
14.01
2.865
0.083
0.3333
14.01
15
927
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
y0 = 1.0759E+000 +/- 2.9357E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 22
Number of estimated parameters.... 2
Degrees of freedom 20
Residual mean 2.449E-005
Residual standard deviation 0.0058
Residual variance 3.364E-005
K
Estimate
9.1883E-004 +/-
Std. Error
9.4092E-006
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
i
•
G
d
H
ri
ft
Cfl
'Fl
Q
WFP-3 BAIL TEST CHEVRON
10 ±M M ! M I j!! M I! I I i J! M i I I! | | j I | ! 11 i t i i | M i i i i I •
2 K = 0.0009139 ft/min
- yO = 1.074 ft
1,
0 i
n Qi
ii -in
11.
5
0"
0-
GD
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Model in? Group
11 H I 11 j\l I 11 111 11 i I i 11 111 111 I i 11 i 11 i 11 i M i
h 4- n.h { £An In,
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP5-SL.AQT
Data set title WFP-5 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 1286
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 15.56
Well screen length 15
Static height of water in well 15.56
Log (Re/Rw) 2.932
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.5127E-003 +/- 1.1406E-005
y0 = 1.1182E+000 +/- 4.1053E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 22
Number of estimated parameters.... 2
Degrees of freedom 20
Residual mean -3.302E-006
Residual standard deviation 0.005376
Residual variance 2.89E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
M
H
H
O
ed
ri
fl •H
WFP-5 SLUG TEST CHEVRON
0
1
I,
! II Ml M MM! MM! IN Ml li I! IN iii MM Ml II III Id
- K = 0.001514 ft/win
- y0 = 1.118 ft
n i
• _* ft _«
n ni
O.OOI
I IT)
GS
i_Li i\ I I 1 M I M i I I I I III I I Ii
AQTESOLV
GERAGHTY
& MILLER, INC.
• Modeling Group
n. A
! * i >
no
0,0 Uofj 1/
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP5-BL.AQT
WFP-5 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
15.56
2.932
0.083
0.3333
15.56
15
554
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 1.3259E-003 +/- 2.4983E-005
y0 = 1.2704E+000 +/- 1.0522E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 30
Number of estimated parameters.... 2
Degrees of freedom 28
Residual mean 0.000641
Residual standard deviation 0.02199
Residual variance 0.0004837
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
t
'4H
Q)
rt
a
o
cd
ad
ft
CO
•H
p
WFP-5 BAIL TEST CHEVRON
in U* gl M Mi I! |il II III II |!l ill M il |M ll! II !! |!l iiiii i£
F K = 0.OO1273 ft/Min
y0 = 1.249 ft
n ni
v=: v >=r J.
0.001
0.0001
II! I
nn
II I! Mi M Ml il III ity II II III II! II I! ll
AQTES0LY
GERAGHTV
a MILLER, INC.
Modeling Group
n. ? 4- fl
Time (min)
n
£ ! . 10
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP6-SL.AQT
Data set title WFP-6 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 572
Radius of well casing 0.083
Radius of well 0.3 33 3
Aquifer saturated thickness 12.32
Well screen length 15
Static height of water in well 12.32
Log(Re/Rw) 2.781
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.0979E-003 +/- 1.2914E-004
y0 = 1.1843E+000 +/- 4.5679E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 23
Number of estimated parameters.... 2
Degrees of freedom 21
Residual mean 0.0007331
Residual standard deviation 0.08913
Residual variance 0.007945
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
J-J
u
0)
i
a
PI
i—i
Sir
•
IFF-6 SLUG TEST CHEVRON
in 4liM!!ll|IM!IIM!|!lhl!l!l|
2 K = 0.0009849 ft/win
- yO = 1.143 ft
TTTp-m • ! 1
P 1
0.01
Dm m -
II II 111 IIIII \\ 111 II HI lit il ii 111 iii II I MM ill MM
AQTESOLV
GERAGHTV
MILLER, INC.
Hi Mode ling Group
P, fatfa 4.4 6,6
Time (min)
«j.-. i.-11.
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP6-BL.AQT
Data set title WFP-6 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 684
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 12.32
Well screen length 15
Static height of water in well 12.32
Log (Re/Rw) 2.781
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 8.1839E-004 +/- 3.0716E-005
y0 = 1.2572E+000 +/- 1.0267E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 17
Number of estimated parameters.... 2
Degrees of freedom 15
Residual mean 5.952E-005
Residual standard deviation 0.01637
Residual variance 0.000268
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
0)
a
CD
O
ed
ri
ft
w
•H
0
WFP-6 BAIL TEST CHEVRON
10 4llllllll|l!lllllll|ll!llllll|lllllllllllllllll)i
- K - 8.191919801 ft/Min -_
yl9 = 1.252 ft
1
0,1
0,01
MO
On
11 U H H I i I H 1 IN I 11 111 H I 11 11 111 i 11 I i 11 111 I i I II 11
AQTESOLV
GERftGHTV
& MILLER, INC.
HI Model ing Group
0. 2.4 4,8 9,6 12
rv
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP7-SL.AQT
WFP-7 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
1646
0.083
0.3333
15.12
15
15.12
2.914
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 2.5665E-004 +/- 1.4081E-005
y0 = 1.0681E+000 +/- 6.1192E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 15
Number of estimated parameters.... 2
Degrees of freedom 13
Residual mean 7.28E-007
Residual standard deviation 0.005653
Residual variance 3.196E-005
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
I 1
u
0)
ra
ft
(fl
•H
R
IFP-7 SLUG TEST CHEVRON
n 41 M ! I!!i I! i 11! i!11j i I i I !! i !iIi! I I! I il I j !! i i! ! i i H
h K = 0.0002557 ft/min
y0 = 1.068 ft
n 1
is, i
0.01 IIIII I M 111 i I I [ 111 11111 11 i 111
AQTESOLV
GERAGHTY
& MILLER, INC.
Modeling Group
I /.-. »
1 1 -J
i line (min j
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set
Data set title
WFP7-BL.AQT
WFP-7 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
15. 12
2.914
1375
0.083
0.3333
15.12
15
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 3.0905E-004 +/- 2.3664E-005
y0 = 1.0209E+000 +/- 7.8858E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 23
Number of estimated parameters.... 2
Degrees of freedom 21
Residual mean 1.36E-005
Residual standard deviation 0.01743
Residual variance 0.0003038
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
u
fjj
r4
\ ;
>—.
L-j
Q
I
TO
•
WFP-7 BAIL TEST CHEVRON
:i j I I i j I I I I I i I ! i I j ! I j i ! I ! ! I ! ! j i ! ! j i ! i ! ! I ! I ! ! M ! !:
K
y0
0.0003015 ft/Min
1.018 ft
1 , t:
n i
\J 4 -L
0,01
0.001 Mi 11 H! li Ml il II! I! Iii ii\i.i.i j I I 1 i ! i
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Modeling Group
0 4-.fi 9.?. 13.R lfl.4 S3.
Time (mini
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set WFP8-SL.AQT
Data set title WFP-8 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 1290
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 16.45
Well screen length 15
Static height of water in well 16.45
Log(Re/Rw) 2.968
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate
K = 2.4991E-004 +/-
yO = 1.0850E+000 +/-
Std. Error
1.1289E-005
6.7501E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 34
Number of estimated parameters.... 2
Degrees of freedom 32
Residual mean 8.68E-006
Residual standard deviation 0.015
Residual variance 0.0002249
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
I 1
I J
u
®
O
r-1
ft
Cfl
•H
P
WFP-B SLUG TEST CHEVRON
in. IT
:i !! I M ! i |! I i! i i! I! |!! !! I i I 11 |! I 111 !! ! ! | i 1 ! i ! !! if
- K = 0.000247 ft/win -
y0 = 1.083 ft -
I—l A i i
it. i
r
AQTESOLV
i GERAGHTY
a MILLER, INC.
Modeling Group
fj Ql H li iH ii Hi H ii' M Ul Hi ii l\Ul ill ii ii Hi ii iii id
n 4.4 8,8 13.2 17.6 ZI
Tiinn (inin)
mim, * F • m • m • • • a • 0
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
WFP9A-SL.AQT
WFP-9A SLUG TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
15.32
2.862
349
0.083
0.359
15.32
15
0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 2.0111E-003 +/- 3.2063E-005
y0 = 1.0296E+000 +/- 9.6765E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 17
Number of estimated parameters.... 2
Degrees of freedom 15
Residual mean 8.984E-005
Residual standard deviation 0.008563
Residual variance 7.332E-005
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
IFP-9A SLUG TEST CHEVRON
! 1
4=?
1
Q
nj
i
G
fi
<D
O
ed
ft
•
1 f
- K = 0.802011 ft/min
- yO = 1.03 ft
0,1
0,01
i| li ||! ll I l! ii JM f ii if!! il! If Ml if jf I i !! ii i-
sa I
oars
iJijTt f: im OO'IC1
11 11 Hi II I Ml II il! HI llllll I ill il II HrHrHrid.il
o i ? ts " R >i Q
, j,, i} !~r <.\l
: ill.?.- i I : : X = = .-
AQTESOLV
GERAGHTY
& MILLER, INC.
UH Mode ling Group
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set WFP9A-BL.AQT
Data set title WFP-9A BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 348
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 15.32
Well screen length 15
Static height of water in well 15.32
Log(Re/Rw) 2.862
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 2.8544E-003 +/- 1.9484E-004
y0 = 1.0967E+000 +/- 4.1374E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 19
Number of estimated parameters.... 2
Degrees of freedom 17
Residual mean 0.002381
Residual standard deviation 0.06096
Residual variance 0.003716
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
G
m
0
d
i—i
ft
m
•H
P
IFP-9A BAIL TEST CHEVRON
i u il 11 i ll li 11 i! I! 11 i I j i 11111111 jl I III 111111! 11I11 It
- K = 0.0192854 ft/Hin
- SO = 1.B97 ft
0.1
0.01
n nni
1 » .'. i f * » I
II"I QITI i":
OH>i
H II Ml 11 ill li Iii Mi li 11 111 111 II II III III II 11
0
1! hut (-
Time (min)
AQTESOLY
GERAGHTY
& MILLER, INC.
US Mode ling Group
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
RWMA2-SL.AQT
RWMA-2 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
0.083
0.3333
9.891
15.5
9.891
2. 641
107
0.000, 0.000, 2.519
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 3.1176E-003 +/- 5.4483E-004
y0 = 3.8418E-001 +/- 3.5609E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 8
Number of estimated parameters.... 2
Degrees of freedom 6
Residual mean 0.0002549
Residual standard deviation 0.02135
Residual variance 0.000456
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
RWMA-2 SLUG TEST CHEVRON
q
a
! 1
o
d
ri
fl
n
IM I M M ! j M I M M M 11 M M i i 11 11 i i | i j | !! i I i ! I! i I L
K = 0.002762 ft/Min
yO = 0.3604 ft
!!
o.m
5a I
I :TTi
Sail I
I BUS
0 3-="
=3TgiTi
rssISSliTl
liSf
i i M\l M I i I i 1 ! I i I ! I i I 1 11 I I I III ! I I I 1 I I i I ! I !
AQTESOLV
GERAGHTY
a MILLER, INC.
iU Model ing Group
Tl n h
II .-. t .•
•1 «~i LR Z.
m 4 * — rime immj
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
RWMA2-BL.AQT
RWMA-2 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
0. 083
0.3333
9.891
15.5
9.891
2.641
689
0.000, 0.000, 2.519
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 3.4602E-003 +/- 6.3690E-005
y0 = 1.2220E+000 +/- 1.3490E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 16
Number of estimated parameters.... 2
Degrees of freedom 14
Residual mean 0.0008432
Residual standard deviation 0.0171
Residual variance 0.0002923
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
0)
d
0
ft
•H
P
RWMA-2 BAIL TEST CHEVRON
10 UI!!llii|ill!lllll|lillli!l!|l!llll(ll|IMlllllH
: K r 0.003319 ft/Min
- y0 = 1.189 ft
0,1
•DO
n ni 111»i1111111111111111111111111111111111111!i
'""0, 2.4 4.8 7.2 9,6
Time (min)
IHII
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Model ing Group
1 ^
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA3-SL.AQT
Data set title RWMA-3 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 213
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 10.03
Well screen length 15.5
Static height of water in well 10.03
Log(Re/Rw) 2.59
A, B, C 0.000, 0.000, 2.405
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 3.0589E-003 +/- 2.7620E-004
y0 = 6.2907E-001 +/- 3.1831E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 9
Number of estimated parameters.... 2
Degrees of freedom 7
Residual mean 0.000377
Residual standard deviation 0.02062
Residual variance 0.0004251
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
RWMA-3 SLUG TEST CHEVRON
fr*
m
•H
1
i! I i i !! I ! | I I I!11! I ! |! ! t!! i I I i |! i i iI Ii I ! j !! i !! i i I
h K = 0.002807 ft/Hin
yO = 0.5996 ft
0,01 n 11 II! M In II Hi ii in III II II II! HHI II ! II
n L . . 1 j 1.
AQTESOLV
GERAGHTY
& MILLER, INC.
HI Model ing Group
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
RWMA3-BL.AQT
RWMA-3 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
0.083
0.359
10.03
15.5
10.03
2.59
540
0.000, 0.000, 2.405
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 1.5029E-003 +/- 1.6941E-005
y0 = 1.4678E+000 +/- 7.2107E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 22
Number of estimated parameters.... 2
Degrees of freedom 20
Residual mean 0.0003752
Residual standard deviation 0.01276
Residual variance 0.0001629
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
0)
H
O
?3
ft
w
.==1
P
RWMA-3 BAIL TEST CHEVRON
10 4! ii iii II |M M ill M Ml M! i! !! IN M! II Nj M M! M it
i i ! 1
K = 19.19191469 ft/min
y(9 = 1.454 ft
U.l
c s 11 I UJ
AQTESOLV
•I ii II Mi III II iii ii ill ii li
GERAGHTY
& MILLER, INC.
• Modeling Group
1,8 n. 4
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set RWMA5-SL.AQT
Data set title RWMA-5 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 666
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 11.41
Well screen length 15
Static height of water in well 11.41
Log(Re/Rw) 2.671
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 2.1599E-003 +/- 1.7832E-004
y0 = 4.6810E-001 +/- 9.1042E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 5
Number of estimated parameters.... 2
Degrees of freedom 3
Residual mean 1.189E-005
Residual standard deviation 0.005648
Residual variance 3.19E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
u
d
fl
Q
i
ra
ri
a
CO
•H
P
RWMA-5 SLUG TEST CHEVRON
L U!!lil!l!|!l!li!i!i|i!!!!!!ll|!!!l!hM|!M!iMlLi
- K = 8.00212 ft/nin
y0 = 0.4661 ft
0.1 ••^===-'313 i5KJ
l 1 '=TI=::=I Ian MI:
n rrin "rn
0 0
n ni MMi\iM n IM M III n III III n II MI III II II in MI
U ••• hJ * T T .> \J f i Lj :J .*. U
II I
AQTESOLV
GERAGHTY
ft MILLER, INC.
ill Modeling Group
Li
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set RWMA5-BL.AQT
Data set title RWMA-5 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 454
Radius of well casing 0.083
Radius of well 0.359
Aquifer saturated thickness 11.41
Well screen length 15
Static height of water in well 11.41
Log(Re/Rw) 2.671
A, B, C 0.000, 0.000, 2.357
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 2.3877E-003 +/- 4.1522E-005
y0 = 1.3843E+000 +/- 1.2573E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 16
Number of estimated parameters.... 2
Degrees of freedom 14
Residual mean 0.0004964
Residual standard deviation 0.01523
Residual variance 0.0002319
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
I 3
Ur1
_j
y
r;
!—I
I—m
Mi
(fl
RWMA-5 BAIL TEST CHEVRON
lO* WI Mi INI jii M Ml li III li Mi I! Ml iii M h li! hi Hit;
h K
y0
8.002316 ft/win
1.362 ft
0,01
0
BS>I ...IJI. aasai i-. n
SSITI
Mil
11 aaeiasssai
11 ill i i i I 111 I Ii II 11
1.6 3.2 i<8 6,4
Time (min)
R
Chevron Products Company
Salt Lake Refinery
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Mode ling Group
EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set TEL2-SL.AQT
Data set title TEL-2 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points 346
Radius of well casing 0.083
Radius of well 0.3333
Aquifer saturated thickness 14.49
Well screen length 15
Static height of water in well 14.49
Log (Re/Rw) 2.886
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.2879E-003 +/- 2.4528E-005
V0 = 1.0589E+000 +/- 6.0870E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 14
Number of estimated parameters.... 2
Degrees of freedom 12
Residual mean 2.687E-005
Residual standard deviation 0.007195
Residual variance 5.177E-005
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
f: 1
O
_i
ra
ri
ft
•H
•
TEL-2 SLUG TEST CHEVRON i n
i U
- K
- y0
n
O.Ol
0,001
:l ! i ! ! i i I j i i I i ! i i i ! j i ! I f ! i i ! I j I I M I i M ! | I I I I I I I I ! I
• ! i ! I ! i I ! ! I =M
0.601288 ft/min
1.059 ft
Tl
EssTI
i ae i it
lasiian
•Mi,
•\<mn~
i Mi i 11 i 11! ! i I \! I i I H ! I I i I II li
4—I f-» A O
AQTESOLV
GERAGHTY
& MILLER, INC.
Modeling Group
m . ,_ _ _ ' __ \
iiliie i mill J
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set TEL2-BL.AQT
Data set title TEL-2 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points 753
Radius of well casing 0.083
Radius of well 0.33 33
Aquifer saturated thickness 14.47
Well screen length 15
Static height of water in well 14.47
Log (Re/Rw) 2 . 886
A, B, C 0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
Estimate Std. Error
K = 1.5211E-003 +/- 4.7206E-005
y0 = 1.3966E+000 +/- 1.7209E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 22
Number of estimated parameters.... 2
Degrees of freedom 2 0
Residual mean 0.0006277
Residual standard deviation 0.03132
Residual variance 0.000981
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
ft
6
d
w
•H
•
TEL-2 BAIL TEST CHEVRON
n 41 i I i ! i i! | i I !! I i! ! i | i! !! I!! I i | i! I! I!! ! i | i i i i ! i i if-
- K = 0.801521 ft/win
y0 = 1.397 ft
0,1
f ! ! i j
\ • A ! / I
I I H I iI\lI I I I I I I 1 I I 1 i I I I I II1 I I 1 i I ! I II I 11 Ii Ii iI! i i
AQTESOLV
GERAGHTY
& MILLER, INC.
Hi Model ing Group
n
u - • -• : . L i
rr n i n 4 13
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
TEST DESCRIPTION
Data set
Data set title
TEL3-SL.AQT
TEL-3 SLUG TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
11.59
2.742
0. 083
0.333
11.59
15
245
0.000, 0.000, 2.469
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 3.1676E-003 +/- 2.2429E-004
y0 = 4.5169E-001 +/- 1.7728E-002
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 7
Number of estimated parameters.... 2
Degrees of freedom 5
Residual mean 6.107E-005
Residual standard deviation 0.007793
Residual variance 6.073E-005
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
! 1
M
Oji
H H
I I
0)
O
d
a
•H
1 • H-i if IN !! j!i ii M! I! I M li j 1! M li! I!! !i li
-ill
E K = 0.083168 ft/win
y0 = 0.4517 ft
0,01
n nni
f*.
LLU il HI H Hi il li Hi HI il 11
T) .1
Time (min)
Chevron Products Company
Salt Lake Refinery
AQTES0LV
ii^GERAGHTV
^gT« MILLER, INC.
Hi Mode ling Group
EarthFax Engineering. Inc.
TEST DESCRIPTION
Data set
Data set title
TEL3-BL.AQT
TEL-3 BAIL TEST CHEVRON
Knowns and Constants:
No. of data points
Radius of well casing
Radius of well »...
Aquifer saturated thickness...
Well screen length
Static height of water in well
Log(Re/Rw)
A, B, C
11.59
2.741
0.083
0.3333
11.59
15
339
0.000, 0.000, 2.467
ANALYTICAL METHOD
Bouwer-Rice (Unconfined Aquifer Slug Test)
RESULTS FROM STATISTICAL CURVE MATCHING
STATISTICAL MATCH PARAMETER ESTIMATES
K = 2.6985E-003 +/- 3.2194E-005
y0 = 1.1892E+000 +/- 7.9872E-003
ANALYSIS OF MODEL RESIDUALS
residual = calculated - observed
weighted residual = residual * weight
Weighted Residual Statistics:
Number of residuals 20
Number of estimated parameters.... 2
Degrees of freedom 18
Residual mean 0.000421
Residual standard deviation 0.01198
Residual variance 0.0001436
Estimate Std. Error
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
''w'
G
fl)
0)
0
cd
i—«
«
•H
P
TEL-3 BAIL TEST CHEVRON
10 illllllll|lllllllll|lilllllll|illhllll|llllllll^
5 K = 0.002698 ft/«in
- yB = 1.189 ft
1
O.l
0.01
Ti
MINIMUM II III II 111 III IIII III III IIII 111 III IIII
AQTESOLV
GERftGHTY
a MILLER, INC.
US Mode ling Group
0, 1.2 2.4 3.6 4.8 6.
Time (min)
Chevron Products Company
Salt Lake Refinery EarthFax Engineering, Inc.
APPENDIX D
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
APPENDIX D
DRAIN PACKAGE DATA
EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data
LAYER ROW COL ELEV CONDUCTANCE
3 43 4210. 1.500
3 44 4210. 1.500
3 45 4210. 1.500
3 46 4210. 1.500
3 47 4210. 1.500
3 48 4210. 1.500
3 49 4210. 1.500
3 50 4210. 1.500
3 51 4210. 1.500
3 52 4210. 1.500
3 53 4210. 1.500
3 54 4211. 1.500
3 55 4211. 1.500
3 56 4211. 1.500
3 57 4211. 1.500
3 58 4211. 1.500
3 59 4212. 1.000
3 60 4212. 1.000
3 61 4212. 1.000
3 62 4212. 1.000
3 63 4212. 1.000
3 64 4213. 1.000
3 65 4213. 1.000
3 66 4213. 1.000
3 67 4213. 1.000
3 68 4214. 1.000
3 69 4214. 1.000
3 70 4214. 1.000
3 71 4214. 1.000
3 72 4214. 1.000
3 73 4215. 1.000
3 74 4215. 1.000
3 75 4215. 1.000
3 76 4216. 1.500
3 77 4216. 1.000
3 78 4216. 1.000
3 79 4217. 1.000
3 80 4217. 1.000
D-1 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
3
3
3
3
3
3
3
3
3
3
12
12
13
13
13
14
14
14
14
15
15
15
15
15
15
15
15
15
15
15
15
15
16
16
17
18
81
82
83
84
85
86
87
88
89
90
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
31
32
32
33
4217.
4217.
4218.
4218.
4218.
4219.
4219.
4220.
4220.
4220.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
4200.
1.000
5.000
7.000
5.000
5.000
5.000
5.000
5.000
5.000
5.000
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
D-2 EarthFax Engineering. Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
19
20
21
22
23
24
25
26
27
28
29
30
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
42
43
34 4200.
35 4200.
35 4200.
36 4200.
37 4200.
37 4200.
38
39
40
40
41
41
84
45
84
46
84
46
84
47
4200.
4200.
4200.
4200.
4200.
4200.
42 4200.
43 4200.
84 4211.
44 4200.
84 4211.
44 4200.
4211.
4201.
4211.
4201.
4211.
4201.
4211.
4201.
84 4211.
48 4201.
84 4211.
48 4201.
84 4210.
49 4201.
84 4210.
50 4201.
84 4210.
95 4212.
51 4201.
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
0.7500
1.500
1.500
1.000
1.000
15.00
1.000
15.00
1.000
15.00
1.000
15.00
1.000
15.00
1.000
15.00
1.000
15.00
1.000
15.00
1.000
10.00
1.000
10.00
1.000
10.00
5.000
1.000
D-3 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
43 84 4209. 7.500
43 94 4212. 5.000
44 51 4201. 1.000
44 84 4209. 7.500
44 94 4212. 5.000
45 51 4201. 1.000
45 84 4209. 7.500
45 94 4212. 5.000
46 51 4201. 1.000
46 84 4209. 7.500
46 94 4212. 5.000
47 51 4201. 1.000
47 84 4209. 7.500
47 94 4212. 5.000
48 51 4201. 1.000
48 84 4208. 5.000
48 85 4209. 7.500
48 86 4209. 7.500
48 87 4209. 15.00
48 88 4209. 15.00
48 89 4209. 60.00
48 90 4209. 40.00
48 91 4209. 20.00
48 92 4210. 20.00
48 93 4211. 7.500
49 18 4205. 1.000
49 19 4205. 1.000
49 20 4205. 1.000
49 21 4205. 1.000
49 22 4205. 1.000
49 23 4205. 1.000
49 24 4205. 1.000
49 25 4205. 1.000
49 26 4205. 1.000
49 27 4205. 1.000
49 28 4205. 1.000
49 29 4205. 1.000
D-4 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
49 30 4205. 1.000
49 31 4205. 1.000
49 32 4205. 1.000
49 33 4206. 1.000
49 34 4206. 1.000
49 35 4206. 1.000
49 36 4206. 1.000
49 37 4206. 1.000
49 38 4206. 1.000
49 39 4206. 1.000
49 40 4206. 1.000
49 41 4206. 1.000
49 42 4207. 1.000
49 43 4207. 1.000
49 44 4207. 1.000
49 45 4207. 1.000
49 46 4207. 1.000
49 47 4207. 1.000
49 48 4207. 1.000
49 49 4207. 1.000
49 51 4201. 5.000
49 52 4208. 1.000
49 53 4208. 1.000
49 54 4208. 1.000
49 55 4208. 1.000
49 56 4208. 1.000
49 57 4208. 1.000
49 58 4209. 1.000
49 59 4209. 1.000
49 60 4209. 1.000
49 61 4209. 1.000
49 62 4209. 1.000
49 63 4209. 1.000
49 64 4209. 1.000
49 65 4210. 1.000
49 66 4210. 1.000
49 67 4210. 1.000
D-5 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
49 68 4210. 1.000
49 69 4210. 2.000
49 70 4210. 2.000
49 71 4210. 2.000
49 72 4210. 2.000
49 73 4210. 2.000
49 74 4210. 2.000
49 75 4210. 2.000
49 76 4210. 2.000
49 77 4210. 2.000
50 51 4201. 5.000
51 52 4201. 5.000
52 52 4201. 5.000
53 52 4201. 5.000
54 52 4201. 5.000
55 53 4201. 5.000
56 53 4201. 5.000
57 53 4201. 5.000
58 53 4202. 10.00
59 54 4202. 10.00
60 54 4202. 10.00
61 54 4202. 10.00
62 54 4202. 10.00
62 55 4202. 7.000
63 55 4202. 10.00
64 55 4202. 10.00
65 55 4202. 10.00
66 56 4202. 10.00
67 56 4202. 10.00
68 56 4202. 4.000
69 56 4202. 4.000
70 57 4202. 4.000
71 57 4202. 4.000
72 57 4202. 4.000
73 58 4202. 4.000
74 58 4202. 4.000
75 58 4202. 4.000
D-6 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
76 58 4202. 4.000
77 59 4202. 4.000
78 59 4202. 4.000
79 59 4202. 2.500
80 59 4202. 2.500
81 60 4202. 2.500
81 92 4210. 250.0
82 60 4202. 2.500
82 92 4210. 250.0
83 60 4202. 2.500
83 92 4210. 250.0
84 60 4202. 2.500
84 92 4210. 220.0
85 61 4203. 2.000
85 91 4210. 170.0
86 61 4203. 2.000
86 91 4210. 170.0
87 61 4203. 2.000
87 91 4210. 170.0
88 61 4203. 2.000
88 91 4210. 220.0
89 61 4203. 2.000
89 91 4210. 220.0
90 61 4203. 2.000
90 91 4210. 300.0
91 61 4203. 2.000
91 91 4210. 350.0
92 61 4203. 2.000
92 91 4210. 350.0
93 61 4203. 3.000
93 91 4210. 350.0
94 61 4203. 3.000
94 91 4210. 350.0
95 61 4203. 3.000
95 91 4210. 280.0
96 61 4203. 3.000
96 91 4210. 260.0
D-7 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix D
Modeling Report
December 1996
Drain Package Data (Continued)
LAYER ROW COL ELEV CONDUCTANCE
97 61 4203. 3.000
98 61 4203. 3.000
99 61 4203. 3.000
100 61 4203. 3.000
101 61 4203. 3.000
102 61 4203. 3.000
103 61 4203. 3.000
104 61 4203. 3.000
105 61 4203. 3.000
D-8 EarthFax Engineering, Inc.
APPENDIX E
Chevron Products Company Groundwater Model Report
Salt Lake Refinery December 1996
APPENDIX E
TRANSPORT PARAMETER DISCUSSION
EarthFax Engineering, Inc.
TRANSPORT PARAMETER DISCUSSION
CHEVRON PRODUCTS COMPANY
Salt Lake Refinery
Salt Lake City, Utah
Prepared by
EARTHFAX ENGINEERING, INC.
Midvale, Utah
December 1996
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
TABLE OF CONTENTS
Section Ease.
E.1 - MOLECULAR DIFFUSION E-1
E.2 - RETARDATION FACTOR E-2
E.3 - DISPERSIVITY E-3
E.4 - POROSITY AND EFFECTIVE POROSITY E-5
E-5 - BULK DENSITY E-5
E.6 - FIRST-ORDER REACTION RATE E-6
E.7 - TRANSPORT PARAMETER CALIBRATION VALUES E-6
E.7.1 Decay Rate E-6
E.7.2 Retardation E-7
E.7.3 Porosity E-7
E.7.4 Dispersivity E-7
E.7.5 Molecular Diffusion E-7
E.8 - REFERENCES E-9
LIST OF ATTACHMENTS
ATTACHMENT A FRACTION OF ORGANIC CARBON ANALYTICAL LABORATORY
RESULTS
E-ii EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
APPENDIX E
DESCRIPTION OF TRANSPORT PARAMETERS USED IN
MODELING INVESTIGATIONS
E.I MOLECULAR DIFFUSION
Molecular diffusion in a solution is the process by which ions or molecular constituents
move under the influence of molecular activity from areas of high concentration towards areas
of lower concentration. In other words, independent of the contaminant being moved
physically by the groundwater flow (advection), diffusion will cause the contaminant to move
from an area of high concentration to an area of low concentration until the concentration
becomes uniform. In the presence of advective transport, molecular diffusion becomes one
of three mechanisms that cause mixing and spreading of molecular constituents (Freeze and
Cherry, 1979). The rate of diffusion is generally very low relative to the rate of advective
transport, except in cases where flow velocities are extremely slow or stagnant.
In a porous medium, such as the shallow aquifer beneath the Salt Lake Refinery, the
actual rate of diffusion or apparent diffusion is much less than the diffusion rate observed in
water alone. This results from the tortuosity of the flow path created by the presence of
solids in the medium and the possible sorption of the constituent onto solids. The diffusion
coefficient, which defines the rate of molecular diffusion in a porous media, can be obtained
by multiplying the diffusion coefficient in water by an empirical coefficient. According to
Freeze and Cherry (1979), the empirical coefficient for geologic porous material is between
0.01 and 0.5.
Specific molecular diffusion coefficients for benzene or toluene could not be found in
the literature. However, Fetter (1993) indicated the diffusion coefficient generally ranges from
9.3 x 10"4 ft2/day to 1.9 x 10'3 ft2/day in water at 25° C. The apparent diffusion coefficient
at the Salt Lake Refinery should be less than this range given the lower groundwater
E-1 EarthFax Engineering, inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
temperature and the presence of a porous medium. The lower temperature reduces the
molecular activity that causes diffusion. The range of values used for the molecular diffusion
coefficient during model calibration for the Salt Lake Refinery was 9.33 x 10"6 ft2/day to 9.33
x lO^ft^day.
The lack of a specific diffusion coefficient for benzene and toluene was not expected
to be important since, in this situation, transport due to molecular diffusion is insignificant in
relation to transport due to mechanical mechanisms. To verify that molecular diffusion was
insignificant, the molecular diffusion coefficient was varied from the minimum value to the
maximum value during the initial calibration efforts. Model output was not changed by
variations in the magnitude of the molecular diffusion coefficient. Thus, molecular diffusion
appears to be insignificant at the Salt Lake Refinery.
E.2 RETARDATION FACTOR
The retardation factor is a representation of the degree to which a plume will be
retarded due to sorption of a contaminant onto the organic solids within the aquifer. The
higher the retardation factor, the slower the plume will spread. The retardation factor is
calculated within MT3D based on the bulk density and porosity of the aquifer material and
the activity coefficient (Kd). Discussions of porosity and bulk density are provided in sections
E.4 and E.5 of this appendix respectively.
The activity coefficient is a factor which describes the affinity of a contaminant to
adsorb onto organic solids in the aquifer. The activity coefficient has been calculated using
the Karickhoff relationship (Karickhoff, 1979).
Kd = 0.63 Kow f, OC
E-2 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
Where:
K„w = Octanol-Water partition coefficient
f^ = Mass fraction of organic carbon in aquifer
The octanol-water partition coefficient is readily available in numerous sources. The
values of used to calculate the activity coefficients were obtained from (Mott, 1995). The
octanol-water partition coefficient for benzene and toluene are 134.90 and 446.68
respectively.
The mass fraction of organic content in the aquifer material has been measured in the
laboratory for this investigation based on sample collected during field investigations (see
Attachment A). The measured mass fraction of organic content ranged between 0.09% and
2.72%. Based on a review of the data, an organic carbon content of 0.45% was assumed
at the start of calibration for the shallow aquifer beneath the Salt Lake Refinery for
E.3 DISPERSIVITY
Dispersivity is a factor used to account for the spreading of the contaminant in an
aquifer by mechanical processes. This spreading occurs both longitudinally and transversely
with respect to the flow direction.
The process of water flowing around soil grains in the aquifer divides the flow and
causes the constituent to spread transversely (perpendicular to the direction of flow). This
phenomenon is accounted for in the model by the horizontal transverse dispersivity.
The velocity of the water flow around the soil grains in the aquifer is dependent on the
size of the pore space between grains available for flow. A smaller space results in greater
flow velocity, while a larger space results in a lower flow velocity. As a result, actual flow
E-3 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
velocities at the grain-size level may be slower or faster than the average flow rate. The
variable flow velocities at the grain-size level often result in a plume extending farther in the
direction of groundwater flow than would be calculated using only the average flow rate. This
phenomenon is accounted for in the model by longitudinal dispersivity.
The value of dispersivity, whether horizontal transverse or longitudinal, is dependent
on grain size and grain size distribution. Longitudinal dispersivity is usually much greater than
horizontal transverse dispersivity (Freeze and Cherry, 1979).
Dispersivity tends to be the most elusive of the parameters needed for a contaminant
transport model. Field-scale tests of dispersivity are expensive to run, time consuming, and
of questionable reliability. As a result, dispersivity values are almost always determined
during calibration of the model rather than actually measured in the field. Research is
currently underway to find an accurate way to measure dispersivity in the field. For the time
being, a number of researchers have published figures depicting values for longitudinal
dispersivity measured at different length scales. Longitudinal dispersivity at first appears to
be scale dependant, but when the reliability of the data is taken into account, the scale
dependance of longitudinal dispersivity is less clear. When the reliability of the data is taken
into account, the longitudinal dispersivity tends to range between 1 and 50 ft independent of
scale (Zheng and Bennett, 1995). Zheng and Bennett (1995) also state that horizontal
transverse dispersivity can generally be assumed to be one order of magnitude less than
longitudinal dispersivity.
Based on guidelines presented by Zheng and Bennett (1995), an initial value of 25 ft
was used for longitudinal dispersivity for all cells, while horizontal transverse dispersivity was
initially set to be 0.1 times longitudinal dispersivity.
E-4 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
E.4 POROSITY AND EFFECTIVE POROSITY
Porosity is defined as the volume of in a solid matrix voids divided by the total volume
(Freeze and Cherry, 1979). Effective porosity is the percentage of the total volume that is
available for flow. Not all voids are connected (i.e, some flow paths may be dead ends),
thereby decreasing the void space available for groundwater flow.
The porosities and effective porosities used for the model were not measured in the
field. A typical test for porosity on a small sample of aquifer material wouid not accurately
characterize the porosity of an entire model cell since the shallow aquifer is not homogeneous.
The shallow aquifer beneath the Salt Lake Refinery is composed of interbedded sand, silt, and
clay lenses. As a result the porosity value used in a cell is actually an average of porosities
for the materials found in that cell.
Since field testing for the porosity of the aquifer was not considered appropriate, the
porosity and effective porosity values were determined during calibration. Based on data
provided by Freeze and Cherry (1979) and a knowledge of the soil types present in the aquifer
from drilling logs, effective porosities for the modeling effort were selected to range from 25%
to 40%.
E.5 BULK DENSITY
The bulk density of a solid matrix is the dry weight of a sample of the matrix divided
by its volume. As discussed in Section E.2, the bulk density is used to calculate the
retardation factor. Because the shallow aquifer is composed of sands, silts, and clays, the
bulk density used in the model is a composite of the various soils found at the Chevron
facility. The initial bulk density value used for the model was 122 lbs/ft3. The value used
for the bulk density was kept constant during calibration due to a high confidence in the value
used.
E-5 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
E.6 FIRST-ORDER REACTION RATE
The first-order reaction rate is the rate at which a contaminant is removed from the
groundwater. It is also referred to as the decay rate. This removal may be the result of
volatilization or biodegradation of the contaminant. For this model, the removal of the
contaminant was expected to be dominated by biodegradation, volatilization being negligible.
Volatilization is not expected to be significant because the sand lenses in which the
contaminants are transported are generally at least 10 feet below the surface and are over lain
by sandy clay to silty clay layer.
The range of decay rates used during calibration was obtained from a table provided
by Hinchee et. al., (1995) that listed the biodegradation rates of benzene and toluene at
numerous sites around the United States. The table reports a benzene biodegradation rate in
the field between 0.0002 and 0.09 1/day and a toluene biodegradation rate in the field
between 0.0006 and 0.07 1/day. During model calibration an attempt was made to keep the
decay rate within these ranges or below.
E.7 TRANSPORT PARAMETER CALIBRATION VALUES
E.7.1 Decay Rate
The decay rate was one of the parameters the models are most sensitive to. The
calibrated decay rate for the benzene model was within the range of published values
discussed in Appendix E but not by much. The calibrated decay rate for benzene was 0.0005
1/day which is very near the minimum published decay rate of 0.0002 1/day. The calibrated
decay rate for toluene was not within the range of published values mentioned in Section E.6.
To get the toluene plume to extend far enough a very small decay rate of 0.0001 1/day was
needed. Although this value is not within the range of published values it is acceptable since
the very low value will only cause any simulations to be more conservative. The low decay
E-6 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
rate makes a simulation conservative because the contaminant mass is removed from the
aquifer more slowly as the decay rate decreases.
E.7.2 Retardation
The retardation rate is the other parameter that the models are sensitive to. Of the
factors used to calculate the retardation factor (octanol-water coefficient, porosity, fraction
of organic carbon, and bulk density) the only one that was varied from the initial value was
the fraction of organic carbon. The value used for the fraction of organic carbon was within
the range identified in Section E.2. The calibrated value is 0.1 % which is very close to the
minimum field measured value of 0.09%. As with the low values for the decay rate the
resulting low retardation factor makes any simulations more conservative. With such small
retardation factors and decay rates there is little slowing the spread of groundwater
contamination in the west field.
E.7.3 Porosity
As mentioned in Section E.4 the value of porosity was not varied from the initial
porosity of 30%.
E.7.4 Dispersivity
The longitudinal and transverse horizontal dispersivities were not varied from the initial
value. The calibrated longitudinal dispersivity is 25 ft and the calibrated transverse horizontal
dispersivity is 2.5 ft or 0.1 times the longitudinal dispersivity.
E.7.5 Molecular Diffusion
A preliminary sensitivity analysis during calibration indicated that the molecular
E-7 EarthFax Engineering, Inc.
Chevron Products Company Appendix E
Salt Lake Refinery Transport Parameter Discussion
December 1996
diffusion had little if any effect on the models. Varying the molecular diffusion coefficient by
plus or minus an order of magnitude caused no visually apparent changes in the model results.
Therefore the initial value for molecular diffusion was not changed during calibration.
E-8 EarthFax Engineering, Inc.
Chevron Products Company
Salt Lake Refinery
Appendix E
Transport Parameter Discussion
December 1996
REFERENCES
Borden. R. C. Gomez, CA. and Becker, M. T. Geochemical Indicators of Intrinsic
Boremediation. Ground Water. Vol. 33, No. 2, pp. 180 - 189.
Domenico, P.A. and Schwartz, F. W. 1990. Physical and Chemical Hydrogeology. John
Wiley & Sons, Inc. New York, New York.
Fetter, C. W. 1993. Contaminant Hydrogeology. Macmillan Publishing Company, New
York, New York.
Freeze, R.A. and Cherry J.A. 1979. Groundwater. Prentice-Hall, Inc. Englewood Cliffs,
New Jersey.
Hinchee, R. E. Kittel, J.A. and Reisinger, H.J. 1995. Intrinsic Bioremediation. CRC
Press. Boca Raton, Florida.
Karickhoff S. W. Brown, D. S. and Scott T.A. 1979. Sorption of Hydrophobic Pollutants
on Natural Sediments. Water Research. Vol. 13, No. 3, pp. 241 to 248
Mott, H.V. 1995. A Model for Determination of Phase Distribution of Petroleum
Hydrocarbons at release sites. Ground Water Monitoring & Remediation. Vol. 15, No.
3, pp. 157 - 165.
Zheng, C. and Bennett, G.D. 1995 Applied Contaminant Transport Modeling, Theory and
Practice. Van Nostrand Reinhold. New York, New York.
E-9 EarthFax Engineering, Inc.
Chevron Products Company Appendix E
Salt Lake Refinery Transport Parameter Discussion
December 1996
ATTACHMENT A
FRACTION OF ORGANIC CARBON ANALYTICAL LABORATORY RESULTS
EarthFax Engineering, Inc.
Date: 7/9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008701
Project: WEST FIELD DRILLING
Sample Desc: WFP-10
Date Sampled: 6/19/96 Time Sampled: 12:00
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD
INORGANIC PARAMETERS
Total Organic Carbon, rag/Kg
Receiving Temperature, C
1, 530
5
450
0
7/ 5/96 10:30 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE tf W<generic.rpt}
ELKO. NEVADA 89801
702 738 01 1 1 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008702
Project: WEST FIELD DRILLING
Sample Desc: WFP-11A 13.5-14
Date Sampled: 6/19/96 Time Sampled: 15:30
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5, 270
5
500
0
7/ 5/96 10:30 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE HlVfgeneric.rpt}
ELKO. NEVADA 89801
702 738 01 1 1 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 71 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008703
Project: WEST FIELD DRILLING
Sample Desc: WFP-11B 17.6-17.8
Date Sampled: 6/19/96 Time Sampled: 15:45
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
3, 930
5
400
0
7/ 5/96 10:30 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
Approved By:
1250 LAMOILLE HWfgeneric.rpt}
ELKO. NEVADA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 11 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008704
Project: WEST FIELD DRILLING
Sample Desc: WFP-12A 13.8-15
Date Sampled: 6/20/96 Time Sampled: 9:00
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
3,140
5
400
0
7/ 5/96 10:30 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE tfwfgeneric.rpt}
ELKO, NEVADA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So, 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008705
Project: WEST FIELD DRILLING
Sample Desc: WFP-12B 16-17
Date Sampled: 6/20/96 Time Sampled: 9:00
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATS
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5, 040
5
400
0
7/ 5/96 10:30 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE tf IV fgeneric.rpt}
ELKO, NEVADA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008706
Project: WEST FIELD DRILLING
Sample Desc: WFP-13A 10-11
Date Sampled: 6/20/96 Time Sampled: 12:45
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
3,280
5
250
0
7/ 9/96 9:00 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
Approved By: /AftMS^
1250 LAMOILLE HWfgeneric.rpt}
ELKO. NEVADA 89801
702 738 01 1 1 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab#: 96-U008707
Project: WEST FIELD DRILLING
Sample Desc: WFP-13B 5-5.5
Date Sampled: 6/20/96 Time Sampled: 12:45
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
1, 980
5
200
0
7/ 9/96 9:00 SW846 9060 RR
6/12/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE HWfgeneric.rpt}
ELKO, NEVADA 89801
702 738 01 11 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008708
Project: WEST FIELD DRILLING
Sample Desc: WFP-14A 9-10
Date Sampled: 6/21/96 Time Sampled: 9:40
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5, 780
5
200
0
7/ 9/96 9:00 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE HWfgeneric.rpt}
ELKO, NEVADA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 11 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008709
Project: WEST FIELD DRILLING
Sample Desc: WFP-14B 15-16
Date Sampled: 6/21/96 Time Sampled: 9:40
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 770
5
350
0
7/ 9/96 9:00 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE wfgeneric.rpt}
ELKO. NEVADA 8980 1
702 738 01 1 1 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab#: 96-U008710
Project: WEST FIELD DRILLING
Sample Desc: WFP-15A 9.5-10.5
Date Sampled: 6/21/96 Time Sampled: 14:50
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5, 590
5
250
0
7/ 9/9S 9:00 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE tfW<generic.rpt}
ELKO. NEVAOA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
801 262 7299 PHONE
801 262 7378 FAX
Date: 7/ 9/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 9084
Lab #: 96-U008711
Project: WEST FIELD DRILLING
Sample Desc: WFP-15B 12.5-15
Date Sampled: 6/21/96 Time Sampled: 14:50
Date Submitted: 6/21/96 Time Received: 17:00
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5,590
5
300
0
7/ 9/96 9:00 SW846 9060 RR
6/21/96 17:00 RCG
NOTE: Sample submitted on ice.
1250 LAMOILLE tfWlfgeneric.rpt}
ELKO. NEVADA 89801
702 738 0111 PHONE
702 753 7255 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
801 262 7299 PHONE
801 262 7378 FAX
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002324
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-1
3.0' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 12:45
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4,330
9
160
0
3/11/96 13:30 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002325
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-5
0.0' to 2.0' (TOC)
2.0' to 2.5' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 13:15
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
27,200
9
800
0
3/11/96 13:30 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
80 1 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
CHEMTECH-FORD ANALYTICAL LA80RA-
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002188
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-6
7.0' to 8.0' (TOC)
8.0' to 9.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 14:35
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
1,110
8
160
0
3/11/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002326
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-7
2.5' to 3.5* (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 13:55
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
5,140
9
200
0
3/11/96 13:30 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
CHEMTECH-FORD^ _ ANALYTICAL LA80RAT0RIE
Date: 3/14/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6992
Lab #: 96-U002327
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-8
2.5' to 3.5' (TOC)
4.5* to 5.0' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 14:50
Date Submitted: 3/1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 540
9
160
0
3/12/96 6:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
80 1 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002185
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-9
3.0' to 4.0' (BTEX)
4.0' to 5.0' (TOC)
Date Sampled: 2/28/96 Time Sampled: 14:05
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 000
8
160
0
3/ 7/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
80 1 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002177
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-10
3.0' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 15:25
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
1, 510
8
200
0
3/ 5/96 15:00 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 282 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002173
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-11
4.0' to 5.0' (TOC)
5.0' to 6.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 10:10
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
857
8
80
0
3/ 1/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
80 1 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002328
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-14
2.0' to 3.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 15:20
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4,890
9
160
0
3/12/96 6:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHOUE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 0 7 6 905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002187
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-15
3.0' to 4.0' (TOC)
4.0' to 4.5' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 15:50
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4,550
8
160
0
3/11/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
80 1 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab#: 96-U002186
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-16
3.0' to 4.0' (TOC)
4.5' to 5.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 14:40
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2,200
8
160
0
3/11/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
CHEMTECH-FORD ANALYTICAL LABORATOR
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002178
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-17
3.5' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 16:35
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2,700
8
160
0
3/ 5/96 15:00 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
CHEMTECH-FORD ANALYTICAL LABORATORIE
Date: 3/14/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6992
Lab#: 96-U002333
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-19
3.5' to 4.0' (BTEX)
4.0' to 5.0' (TOC)
Date Sampled: 3/1/96 Time Sampled: 11:15
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, c
7,030
9
200
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
507 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002329
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-20
2.0' to 2.5' (TOC)
2.5* to 3.0' (BTEX)
Date Sampled: 2/29/96 Time Sampled: 15:50
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 720
9
160
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6 90 5
ANALYTICAL LABORATORY
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002183
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-21
2.5' to 3.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 12:00
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2,930
8
100
0
3/ 7/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002184
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-22
3.0' to 4.0' (TOC)
4.5' to 5.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 12:25
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4,200
8
100
0
3/ 7/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002179
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-23
3.0' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 17:05
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
3, 090
8
100
0
3/ 5/96 15:00 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 282 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84107 6905
CHEMTECH-FORD ANALYTICAL LABORATORY,
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002174
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-24
5.0' to 6.0' (TOC)
6.0' to 6.5' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 11:10
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 920
8
160
0
3/ 1/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By: Q.
{generic.rpt}
80 1 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002331
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-25
4.0' to 4.5' (BTEX)
Date Sampled: 3/1/96 Time Sampled: 9:15
Date Submitted: 3/1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
1, 540
9
160
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/14/96
Group #: 6992
Lab #: 96-U002330
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-26
2.0' to 2.5' (TOC)
3.5' to 4.0" (BTEX)
Date Sampled: 3/1/96 Time Sampled: 8:45
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 910
9
200
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 34 1 0 7 690
Date: 3/14/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6992
Lab #: 96-U002334
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-27
3.5' to 4.0' (TOC)
4.5' to 5.0' (BTEX)
Date Sampled: 3/1/96 Time Sampled: 12:00
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, c
5,300
9
225
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
CHEMTECH-FORD
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002182
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-28
4.0' to 5.0' (TOC)
5.0' to 6.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 11:15
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
930
8
160
0
3/ 7/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002180
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-29
3.0' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 9:05
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2, 770
8
100
0
3/ 5/96 15:00 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
Date: 3/12/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6955
Lab #: 96-U002175
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-30
3.5' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 12:47
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
4, 950
8
160
0
3/ 1/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
80 1 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
HD ANALYTICAL LABORATORY
Date: 3/14/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6992
Lab #: 96-U002332
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-32
2.0' to 2.5' (TOC)
2.5' to 3.0' (BTEX)
Date Sampled: 3/1/96 Time Sampled: 10:00
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2,400
9
160
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905
Date: 3/14/96
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Group #: 6992
Lab #: 96-U002335
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-33
3.5' to 4.0' (TOC)
6.0* to 6.5' (BTEX)
Date Sampled: 3/1/96 Time Sampled: 12:38
Date Submitted: 3/ 1/96 Time Received: 14:45
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
323
9
100
0
3/13/96 7:00 SW846 9060 MA
3/ 1/96 14:45 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 690
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab #: 96-U002181
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-34
3.0' to 4.0' (TOC)
4.0' to 5.0' (BTEX)
Date Sampled: 2/28/96 Time Sampled: 9:30
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAMETER RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
3,150
8
160
0
3/ 7/96 13:30 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By: Ql
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 107 6905
To: EARTH FAX ENGINEERING
7324 So. 1300 E. STE 100
Midvale, UT 84047
Date: 3/12/96
Group #: 6955
Lab#: 96-U002176
Project: SOLUTE MODEL/UC-512.01
Sample Desc: MG-35
3.0' to 4.0' (TOC)
4.5' to 5.0' (BTEX)
Date Sampled: 2/27/96 Time Sampled: 13:22
Date Submitted: 2/29/96 Time Received: 10:20
CERTIFICATE OF ANALYSIS
PARAIiSTSR RESULT
DATE
MDL ANALYZED METHOD ANALYST
INORGANIC PARAMETERS
Total Organic Carbon, mg/Kg
Receiving Temperature, C
2,850
8
200
0
3/ 5/96 15:00 SW846 9060 MA
2/29/96 10:20 RCG
NOTE: Sample submitted on ice.
Approved By:
{generic.rpt}
801 262 7299 PHONE
801 262 7378 FAX
6100 SOUTH STRATLER
SALT LAKE CITY UTAH 84 1 07 6905