f II I THE GINN CORPORATION Conslli/ing Engineers June 20,1995 Pete Davis, P .E.. Texas Turnpike Authority P.O. Box 190369 Dallas, Texas 75219 RE: Addison Toll Tunnel Environmental Site
Assessment Dear Mr. Davis: Transmitted herewitb are two (2) copies of the Phase One Environmental Site Assessment for the Addison Toll Tunnel. We are also forwarding copies to tbe parties
listed below. Sincerely, 􀀱􀀱􀀱􀁦􀀷􀁾􀁟􀀯􀀠H. Wayne Ginn, P.E. HWGflw Enclosures cc; Glenn Houser, HNTB (w/o enclosures) Ron Whitehead, Town ofAddison Jim Jackson, Dallas County Commissioner
Sam Stuart, AATI 17103 PresIon Road. Suite 205 • Dallas. Texas 75248 • Phone 214/248·4900 P.O. Box 796577. Dallas. Texas 75379·6577. FAX 2141931·1452 
I . I I I i J PHASE ONE ENVIRONMENTAL SITE ASSESSMENT of the proposed Keller Springs Toll Tunnel Addison, Texas Prepared for the TEXAS TURNPIKE AUTHORITY ... by HDR ENGINEERING, INC.
June 12, 1995 i I 
PHASE ONE ENVIRONMENTAL SITE ASSESSMENT the proposed Keller Springs Toll Tunnel Addison, Texas TABLE OF CONTENTS I. Summary ........... , .. , ... , . , , .. , , , , . , , , , .. , ,
, . ' , , . , ' , , , , 1 II. Introduction , , .... , , , , ... , ..... , , , , , ..... , ... , , .. , , . , .. , ... ' 3 II. 1 Purpose. . , . . . . . , . . . . , , . . . . , . . . .
, . , , . , . , , . . . . ' . , , , . . . 3 11.2 Special Terms and Conditions ........ , ...... " ....... , .. ,. 4 11.3 Limitations and Exceptions of Assessment ... , . ' , .......
, ..... , 5 11.4 Audit Dates and Participants ...... , , , , ................. , ... 5 III. Site Description ........ , .... , ...... , .. , .... , ...... , , .... , ... 6 111.1 Location
and Description .. , ...... ' ...... , .. ,', ....... , .. , 6 111.2 Site and Vicinity Characteristics ......... ', ........ " ...... , 6 111.3 Description of Structures, Other improvements,
Roads ........... 10 111.4 Information Based on Experience and Knowledge .", .. ,' .. , .. , 11 111.5 Current Uses ......... , . , ..... , ... , . , ..... , .. , , .. , . , .. 11 111.6
Current and Past Uses of Adjoining Properties .... , ' .... ' ...... 11 IV. Record Reviews ....... , ..... " .......... ',., .. , ....... " .. 12 IV.l Sources of Information. , , ......
, .. , ........ , , , .......... 12 IV.2 Reference Material Discussion .... , .. ' .. , .... ,', ......... , 14 IV.3 Historical Use (Aerial Photographs) .. , . ' . , ...... , , .. ,
...... , 15 V. Information from Site Reconnaissance and Interviews ... " ....... ".,. 17 V.l Site Reconnaissance .. , . , ... , ..... , , .... ' .............. 17 V.2 Interviews .........
, ....... , ...................... 􀀬􀁾.. 23 VI. Findings and Conclusions ....... ' ...... , .... ,' ....... , ....... 28, VII. Signatures of Environmental Professionals ... "., .....
,' ..... ,", . ' . 30 VIII. Tables I -Database Information 
PHASE ONE ENVIRONMENTAL SITE ASSESSMENT the proposed Keller Springs Toll Tunnel Addison, Texas TABLE OF CONTENTS (Con't) IX. Figures 1. Location Map 2. S.C.S. Soil Survey Map 3. Geologic
Atlas 4. FEMA Map 5. U.S.G.S. Map 6. Database Area Plan 7. North Detailed Area Plan 8. South Detailed Area Plan X. Appendices A -Aerial Photographs (1994, 1990, 1984, 1975, 1971, 1957)
B -Site Photography C -Geologic Profile (East & West Portal) D -Proposed ROW -Figure 3, HNTB E -Scope of Services ii 
.) I , j PHASE ONE ENVIRONMENTAL SITE ASSESSMENT I. Summary HDR Engineering, Inc.'s (HDR) Phase 1 -Environmental Site Assessment (ESA) of the proposed right of way (ROW or site) for
the Texas Turnpike Authority tunnel resulted in several findings and recommendations which should be addressed before a transfer of property ownership is executed. The ESA commenced
on April 7. 1995, at the request of the Texas Turnpike Authority. Activities included a "snapshot" review of pertinent and available documents, interviews with site personnel, and a
site inspection of the property grounds for visual signs of underground storage tanks, and general environmental conditions. The draft ESA report (May 31, 1995) has been revised to include
recenlly obtained geologic information. Lachel & Associates, Inc. (LAI) initiated a geotechnical investigation program in April which focused on geologiC issues relating to the tunnel
construction only. The results of their sampling program is summarized and shown on Figure 1 " Draft Geologic Profile -West Portal" and Figure 2 "Draft -Geologic Profile -East Portal"
(Appendix C). General findings were made during the ESA. Foremost is the fact that both the ROW and areas in the vicinity of the Site are, or have been, heavily industrialized. Both
sources and routes of potential contamination are thought to exist on or near the site. The site exhibits no outward indications of serious environmental impairment and this investigation
has not identified any environmental impairment that would cause us to recommend,the Authority not purchase these properties. Many of the documents reviewed concerning operations of
facilities near to the subject property were not available and many of those . that could be reviewed were incomplete. Several reports were in conflict with each other, as was some of
the information supplied by those people interviewed. Texas Turnpike Authority 1 June 12, 1995 Environmental Site Assessment· Phase I 
Based upon findings of the ESA, we propose the following recommendations. • Sample existing piezometers along the proposed ROW east and west of the airport. • Phase II Environmental
Site Assessment (intrusive sampling). • Recommend the completion of a title survey. • General clean up of drum storage areas. • Asbestos investigation of buildings Samples (physical
equipment, liquid or soil) were not obtained as part of this audit Consequently, we do not have any laboratory data, either physical or chemical, which supports, nor refutes, the potential
liabilities associated with the ROW. The basis for our recommendations and suggestions are visual observations of the site, supported by the photographs which accompany this report,
as well as other documentation which appears in the appendices to this report. Furthermore, there is the possibility that less obvious environmental concerns and liabilities, not readily
noticeable from simple visual inspection, may exist, and this should not be excluded from consideration. Texas Tumpike: Authority 2 June 12, 1995 Environmental Site Assessment Phase
1 
II. Introduction The Texas Turnpike Authority is planning to purchase the ROW, for the construction of a tunnel under a portion of the Addison Airport, with the intent of connecting
the eastern and western portions of Keller Springs Road, currenlly separated by the Addison Airport, The proposed ROW affects an area approximately 3700 feet long by 100 feet wide, HDR
Engineering, Inc, (HDR) has been contracted to provide a Phase 1, Environmental Site Assessment (ESA) for the proposed ROW, II. 1 Purpose HDR; at the request of the Texas Turnpike Authority,
has completed a Phase One Environmental Site Assessment This ESA was conducted in accordance with the attached Scope of Services (See Appendix E) to evaluate the potential for the presence
of hazardous SUbstances and/or petroleum products at the above-referenced site as the result of any past or present land use on or near the subject property, This ESA is based upon the
review of readily available documents and site visits for the purpose of evaluating the history of past use and identifying sources of potential contaminants, Three areas of review include:
1, Local -Review of readily avaifable information held by the Town of Addison and City of Carrollton, Texas. Interviews with local environmental quality officials and business managers
familiar with the subject property and local history in general were conducted. 2. State & Federal -Acquisition and review of government and priVate agency databases containing environmental
information pertinent to the subject property and vicinity. These include databases and files maintained by the U,S. Environmental Protection Agency (EPA), Texas Natural Resource Conservation
Commission (TNRCC), Texas Department of Health (TDH) and the Texas Water Development Board (TWDB). Texas Tumpike Authorlly 3 June 12. 1995 Environmental Site Assessment 􀁾􀀠Phase I 
11.2 3. Site visit -Several site visits were made to identify visible evidence of the presence of, or the potential for the presence of, hazardous substances and/or petroleum products
and non-compliance areas. In addition, a review of land use on and adjacent to the subject property was conducted. Special Terms and Conditions This investigation addresses the likelihood
of the presence of hazardous substances and/or petroleum products resulting from past and current known uses of the site and nearby properties. As a result, certain conditions, such
as those listed below, may not be revealed: 1. naturally occurring toxics in the subsurface soils, rocks, water, or toxicity of the onsite flora; 2. toxicity of substances common in
current habitable environments, such as, stored household products, building materials, and consumables; 3. biological pathogens; 4. contaminant plume below the surface from a remote
source; 5. contaminants or contaminant concentrations that do not violate present regulatory standards but may violate such future standards; and, 6. unknown site contamination, such
as, "midnight dumping" and/or accidental spillage which could have occurred after the site visit by HDR. Services for this project were conducted in accordance with the Agreement between
the Texas Turnpike Authority and HDR. No warranty or guarantee of site conditions is intended. This report is solely for the use of the Texas Turnpike Authority and any reliance on this
report by third parties shall be at such party's sale risk. Te){as Turnpike Authority 4 June 12, 1995 Environmental She Assessment· Phase I 
11.3 11.4 Limitations and Exceptions of Assessment The scope of this investigation is limited to visual observation of surface conditions at the site, interviews with public and private
personnel, and a review of readily available reports and literature, Facts that have been concealed, withheld or not fully disclosed at the time this report was prepared may have significant
impact on the findings and recommendations of this study, No sampling, laboratory analysis, or determination of asbestos containing materials activities were conducted as part of this
investigation. This approach reflects current professional practice unless the information obtained as part of this work suggests the need for further investigation. Audit Dates and
Participants The audit team for this investigation was composed of Mr. Victor M, Zepeda, P.E., R.E.P" and Mr. Troy Hotchkiss, E.I. T. The site was visited on five occasions (Refer to
Table 2, in Section V.1 of this report for specific dates). The Report was subjected to a Quality Review by Mr. Mike Harris, a Senior Environmental Professional, on June 12, 1995. Texas
Turnpike Authority 5 June 12, 1995 envIronmental Site Assessment· Phase I 
III. Site Description 111.1 Location and Description The subject property is located within the Town of Addison. Texas. (Figure 1) generally bisecting the Addison Municipal Airport from
east to west. The site has been a part of the airport since 1956. when the airport was first constructed. A complete legal description and a property survey with easements of the tunnel
project site were not available. An alignment plan produced by Howard Needles Tammen & Bergendoff. titled Figure 3, HNTB (Appendix OJ, was used as a guide to identify the limits of the
proposed tunnel ROW. The administrative offices of Addison Airport are located at: Addison Airport 4505 Claire Chennault Dr. Addison. Texas 75248 111.2 Site and Vicinity Characteristics
The subject property is located on a generally flat topographic high point. approximately 640 feet above the National Geodetic Vertical Datum plane (NGVD). as determined from USGS topographic
quadrangle maps. At the subject site location. surface drainage is either toward the east to White Rock creek or the west toward an unnamed tributary of Hutton Branch which feeds into
the Trinity River. Surface Water Characteristics No surface water impoundments are known to exist on the site. The existing portion of Keller Springs Road on the eastern side of the
airport is drained by roadside ditches toward the east. From review of aerial photos. United States Geologic Survey (USGS) maps and site visits. no other delineable watercourses were
identified on the eastern portion of the subject property. Where the proposed tunnel crosses the runway proper. the surface grade appears to be toward the south. However. the tunnel
location where it crosses the flight operations area is generally a local topographic high point. Texas Turnpike Authority 6 June 12. 1995 EnV!({lOmenlal Site Assessment -Phase I 
The runway and western portions of the airport near the proposed tunnel are drained by a surface swale toward the north and west, away from the proposed "west portal" of the toll tunnel.
Between the west portal and Midway Road, the existing Keller Springs Road is drained by roadway curbs and storm sewers toward the north, eventually to a tributary of Hutton Branch. Soils
and Geology The subject property is located in northern Dallas County in the Blackland Prairie physiographic province. This region is characterized by little relief and dark, plastic
clay soils. The subject property is generally conforming to this description, although significant disturbance to the surface clays is evident as a result of urbanization and industrialization
of the area, (Appendix B, Photo 15). The geologic setting, as mapped by the Geologic Atlas of Texas, Dallas Sheet (1972, revised 1988, University of Texas, Bureau of Economic Geology),
is within the Austin Chalk Formation. This formation is cited as being generally "Chalk, mostly microgranular calcite, some calcareous clay, weathers white." This formation is known
to have very low porosity and permeability, thus forming an aquitard, or barrier to vertical groundwater flow. The reported thickness of the formation is approximately 300-500 feel.
The surface soils of the subject property are in the Stephen-Upland land complex type. This complex is typified by one to four percent slopes and is well drained. Due to commercial/industrial
development, the surface layers of the soils have been extensively disturbed by building, street, and especially airport construction. Where the soil is relatively undisturbed, the surface
layer is moderately alkaline, very dark brown silty clay with a typical thickness of one and a half to two feel. Permeability and available water capacity are moderately low. Photo 15
depicts the surficial clays overlying the Austin chalk approximately 1/4 mile north of the West Portal. Texas Turnpike Authority 7 June 1:2, 1995 Environmental Sile Assessment 􀁾􀀠Phase
I 
The Texas Water Commission (TNRCC) maps, Major AQuifers of Texas and Minor Aquifers of Texas locate the subject property above the Trinity (downdip) and Woodbine (downdip) Aquifers,
the former being the more significant and deeper of the two. Due to poor hydraulic communication between potential shallow, perched groundwater and deeper usable aquifers, the local
surface recharge rate of these groundwater features is minimal. Some water is occasionally encountered in the cracks and fissures of the limestone formation, especially the upper, weathered
section. Local shallow subsurface flow is undetermined but is assumed to generally follow topography. Assuming uniform weathering and surface top soil/clay coverage overthe unweathered
chalk, subsurface flow would be expected to drain generally east and northwesterly from the center of the subject property, generally conforming to pre-development surface contours.
However, without a thorough hydrogeologic investigation, it would be imprudent to estimate the likelihood for the presence of on-site subsurface contamination the origins of which are
from oftsite areas. A review of readily available subsurface investigations in the area revealed the following geologic observations: A) Aviall Fuel Farm on the Addison Airport (Approximately
1/2 mile south of the site) "The surface material consists of a black alluvial clay layer approximately three feet thick. This is a plastic clay of very low permeability .. A soft limestone
of at least ten feet in thickness underlies the clay layer. A blue rock was mentioned as being present at about 13 feet below ground surface in one excavation." Preliminary Investigation
of Suspected Leaking Underground Motor-Fuel Storage System North American Consultants, Inc. September 1987 Texas Turnpike Authority 8 June 12. 1995 EnVifonmental Site Assessment" Phase
I 
B) AER Manufacturing. 3420 Wiley Post Rd. (Approximately 1/2 mile southwest of the site) "Groundwater was observed to be seeping into the tank hole in several locations from a shaly,
fissile, calcareous clay located at a depth of approximately nine feet. A dark gray, plastic, silty clay (el) was observed to a depth of approximately five feet. The dark gray silty
clay graded into a tan silty clay (ell that extended to the bottom of the excavation. At a depth of approximately nine feet, the clay is shaly. At this depth several seeps were observed
in the walls of the tank hole." UST Closure/Removal Report AER ManufactUring, Inc RERC Environmental, Inc. June 1994 e) Homeliterrextron, 1900 Surveyor (Approximately 1/2 mile southwest
of the site) "Naturally occurring rock in the area is located at a depth of approximately three feet below grade. Water was originally detected at 3.5' below grade... it is believed
that this water is...perched water." This report associates the perched water with a city of Addison water line break. Site C/osure Report JMA, May 1993 D) Raleigh Blakely Hangar (55),
16445 Addison Road (Approximately 1/2 mile north of the site) "...a dark brown/black/gray clay to a depth of approximately 3 to 8 feet. Below the clay, a weathered tan/gray chalky limestone
was encountered which graded to a competent dark gray chalk ...each of the three wells were Tel<as Turnpike Authority 9 June 12, 1995 Environmental Site Assessment· Phase! 
111.3 dry. The soil cores did not exhibit hydrocarbon odors or staining. Several volatile organic compounds were detected in [a boring near the south property line) ... The analytical
testing data for inorganic analysis identified several trace metals ...in all three borings." Phase I and Phase II Environmental Site Assessment for the Property Located at 16445 Addison
Road ENSR ConsuRing, March, 1994 Description of Structures, Other improvements, Roads The subject property has been in heavy commercial or industrial use for some time, particularly
the eastern portions that have been used by airport support facilities including hangars, maintenance shops, runways and aprons, etc. The surrounding land has been extensively urbanized
and is presently in commercial/industrial use. No surface water drains onto the subject property from outside the airport, except on the very westerly portion where a small business
(office) development drains northerly across the existing Keller Springs Road. The subsurface is generally a dense clay overlying a competent, relatively impervious bedrock material.
Subsurface drainage is assumed to follow predevelopment topography. The impact of historic airport/industrial site uses, as well as those of adjoining properties cannot be determined
within the scope of this assessment. Generally all types of utilities were found on the site. Water, wastewater, overhead power, airport tower subsurface control lines, subsurface natural
gas lines, storm sewer systems, overhead and subsurface telephone lines exist to the east of the airport. Transformers were observed to be present on two poles in close proximity to
the site, east of the airport. West of the airport, similar utilities were observed including a pipeline, subsurface power and transformers on power poles. For the purposes 01 this report,
it was assumed that all utilities, including water service lines, sanitary sewer lines, storm sewers, gas and electric lines, or other communications and utility lines and trenches would
be identified and located during the course of the overall project execution. Texas Turnpike Authority 10 June 1,2, 1995 Environmental Site Assessment -Phase I 
111.4 Information Based on Experience and Knowledge Mr. Morales, airport engineer, has been at the airport since approximately 1970 and stated that there have never been any petroleum
storage tanks (PSTs) of any type on the airport other than the fuel farm located at the southeast corner as described by Mr. Ginn (V.2). Several conversations were held with Mr. Morales
to confirm that, to his knowledge, there were no past storage tank leaks or other impairment that might affect the proposed work. The Addison Airport is in the process of completing
a group National Pollutant Discharge Elimination System permit which addresses typical surface pollutants. However, it was not available for review at the time this report was prepared.
111.5 Current Uses The site of the proposed Keller Springs Toll Tunnel is located almost entirely on Addison Airport property, except for the most westerly expansion over the present
portions of Keller Springs. As described in Section 111.3, the site is predominantly used for airport airport and allied industry uses. The eastem portion of the tunnel is located very
near areas of profuse industrial chemical users, predominantly aviation related maintenance facilities. The presence of underground utilities, including sewer, potable and fire suppression
water, gas, electric, telecommunications, etc. should be located and planned for accordingly during the planning and design stages of any type of land development project located on
or near this site. 111.6 Current and Past Uses of Adjoining Properties A review of public records, review of aerial photography, interviews and field observations were made to confirm
the present land use surrounding and impacting the subjectfacility. The land uses immediately adjacent to the property are, for the most part, either airport, airport-related support
Industries or other commercial/industrial/retail facilities. Texas Turnpike Aulhorily 11 June 12. 1995 Environmental Site Assessment Phase I 
I IV. Record Reviews IV.l Sources of Information State and Federal level environmental databases were researched for records that might indicate potential for site contamination on or
near the subject sites. The EPA databases reviewed include the following: • EPA Resource Conservation and Recovery Act (RCRA) Hazardous Waste Registration Listing Report· data extracted
November 29, 1994; • EPA Comprehensive Environmental Response, Compensation. and Liability Act (CERCLA) Information System (CERCLlS) -data extracted April 18, 1994; • EPA Toxic Release
Inventory (TRI) Database for the reporting years 1987 through 1992; • EPA Facility Index System (FINDS) Database -data extracted November 29, 1994. • EPA Civil Enforcement Docket -data
extracted January 25, 1995; • EPA Emergency Response Notification System (ERNS) • data extracted January 2. 1995; State environmental databases. administered by the TNRCC reviewed include;
• TNRCC Petroleum Storage Tank Database· data extracted January 12. 1995; • TNRCC Leaking Tank Sites (LPST) Database -data extracted January 12, 1995; • TNRCC Spill Response Database·
data extracted January 11. 1994; • TNRCC Municipal Solid Waste Facilities Database -data extracted January 13, 1995; Texas Turnpike Autnority 12 June 12. 1995 Environmental Site Assessment
Phase I 
, 1 • TNRCC (and TDH) Hazardous Materials Storage (HMS) Database for the reporting years 1987, 1988, 1989, 1990, and 1991; • TNRCC State Superfund -data extracted January 12, 1995, Other
reference materials utilized in the preparation of this report include: • Soil Survey, Dallas County, Texas, February, 1980, United States Department of Agriculture, Soil Conservation
Service and the Texas Agricultural Experiment Station; • Geologic Atlas of Texas, Sherman Sheet, 1967, University of Texas, Bureau of Economic Geology; • Historic aerial photographs
from 1957, 1963, 1965, 1971, 1975, 1979, 1980, 1982, 1984, 1986, 1988, 1990, 1991, 1993, and 1994; • National Flood Insurance Program, Flood Insurance Rate Map (FIRM\, City of Addison,
Texas, Dallas, County, Community Panel Number 481 089-0005-A, July 16, 1980, U,S, Department of Housing and Urban Development • United States Geological Survey (USGS) Quadrangle maps;
• Texas Department of Transportation (TxDOT) Highway maps; • Dallas MAPScd§ (1995); • Addison Airport of Texas, Inc., Facility Layout Plans (prepared by Greiner, Inc, 1993), Texas Turnpike
Authority 13 June 12, 1995 Environmental Slte Assessment 􀁾􀀠Phase I 
IV.2 Reference Material Discussion The information found in the various local, state and federal databases, has been summarized and incorporated into the Site Reconnaissance and Interview
discussion included as Section V.1.(a & b), Soil Survey Map (See Figure 2) -The majority of the airport falls within the StephenUrban land complex (SCS identifying code 69), with typical
slopes of 1 % to 4%, consisting of a moderately slow permeability, low water capacity, very dark brown silty clay approximately 14 inches thick, overlying the Austin Chalk geologic formation.
On the eastern side of the airport west of the Keller Springs/Addison Rd. intersection are two other soil classifications of equal distribution (in relation to the proposed ROW). The
Dalco-Urban land complex (SCS identifying code 24), with typical slopes of 0% to 3%, consists of moderately deep. moderately well drained soils. slow permeability, low water capacity
black clay between 26 inches to 36 inches deep. The Houston Black-Urban land complex (identifying code of 45), with typical slopes of 0% to 4%, consists of moderately well drained, slow
permeability, high water capacity, dark gray to dark grayish brown clay between 6 inches to 70 inches deep. Geologic Atlas of Texas -Refer to Figure 3, and Section 111.2 of this report
for a complete description of the geology found at this site. Historical Aerial Photographs -Several aerial photographs dated 1957 to 1993 were available at the administrative office
of the Addison Airport. Additional aerial photos dated 1963 to 1994 were also obtained from other sources, some of which are attached (Appendix A). The photographs generally indicate
a commercial and industrial development around the airport. National Flood Insurance Program. FIRM (See Figure 4) -The FIRM maps provide an explanation for each of the designations shown
on the map. The Addison airport lies completely within the zone deSignation "C". The FIRM provides the following definition for Zone C: "Areas of minimal flooding.(No Shading)". A FIRM
zoning classification of "B" is shown on the far east side of the drawing. It als'o provides the following definition: "Areas between limits of the 1 OO-year flood and 500-year flood:
or certain areas subject to 1 OO-year flooding with average depths less that one(1) foot or where the contributing Texas Turnpike Aulhority 14 June 12, 1995 Environmental Site ASSessment·
PhaSe I 
IV.3 drainage area is less than one square mile: or areas protected by levees from the base flood. (Medium shading)". The zone "8" fingers are located 2,000 feet to 3,000 feet downstream
of the subject property. U.S.G.S. Maps (See Figure 5) -The site area under review appears to be at the geographical high point with drainage being directed either west or east, away
from the runway. Further discussion is provided under Section 111.2 Site and Vicinity Characteristics. Texas Highway Dept. Map. Mapsco, and Facility Layout Plan information has been
incorporated within this report. Historical Use (Aerial Photographs) Historical photographs generally spanning the history of the Addison Airport and its surroundings were reviewed.
These include large scale color, as well as black and white, photographs which were reviewed at the airport as well as photographs which were commercially available. The airport photos
included the years 1957, 1965, 1979, 1982, 1986, 1988 and 1993. Commercial photographs (a portion of which are poor quality pictures) include the years 1963, 1971, 1975, 1980, 1984,
1990, and 1994. The photographs indicate that substantial commercial and industrial growth occurred after 1971 with a major increase between 1975 and 1980. 8y 1979 the auxiliary runway
(NE to SW) had been removed and an extension north tothe main (SSE to NNW) runway and an expansion to the west constructed causing the relocation of Midway Road. From these photos, several "Areas of Concern" were identified, which include:
1. A property to the west of the airport, north of the proposed ROW, on Kellway Circle, appears to contain construction debris. Construction debris appears to have collected since 1982,
with what appeared to be a major drum storage area in the 1986 photograph. The following photograph of 1988 indicates only construction debris. 2. A property to the west of the airport,
south of the proposed ROW, at the corner of Midcourt and Chennault, appeared to have a large warehouse in 16xas Turnpike Aulhorily 15 June 12, 1995 1995 Environmental Site Assessment·
Phase I 
the early '80's, which does not appear in the 1988 photograph. This facility appeared to have stored drums in the earlier photographs. The area is now a vacant lot and raised grassy
knoll. 3. A property to the west of the airport, south of the proposed ROW, located between Midway Dr. and Wright Brothers Dr. is presently a fence company and may have been since it
first appeared in a 1965 photograph. In both the 1982 and 1988 photographs this area appeared to have been utilized to store drums and debris. In the 1988 photograph the property appears
to undergone a major cosmetic improvement. This property continues to store material, but does not appear to be as cluttered as before. 4. A property to the west of the airport, south
of the proposed ROW, located on Lindberg Dr. and adjacent to the ST-L & SW R.R. is presently Mayflower Storage Co. property. In photographs dating from 1965, 1979 and 1982, it appears
to have been utilized to store a large quantity of drums. The appearance of the facility has not improved dramatically. Large containers are now stored on site. 5. A property just south
of the airport runway, in the triangular area formed by the East/West railroad and North/South railroad intersection, appears to have been utilized to store large amounts of debris based
on the photographs dated 1979. 1982 and 1986. By 1988 the photographs indicate the area had been cleaned. 6. A property to the west of the airport, south of the proposed ROW, and located
on Surveyor Lane adjacent to a R.R. Spur appears to have stored heavy construction materials in an unorderly fashion through 1982. The 1988 photograph indicates a more organized facility.
7. An area, now located between Ratliff and Glenn Curtiss Roads, west of Addison Road, appeared on photographs prior to 1986 as containing some type of above ground storage tanks or
small utility buildings. These were later identified to be quonset huts owned by a construction company, perhaps United Contracting. Texas Turnpike Authority 16 June 12, 1995 Environmental
SHe Assessment· Phase I 
V.1 V. Information from Site Reconnaissance and Interviews Site Reconnaissance Mr. Victor Zepeda, P.E., REP., and Mr. Troy Hotchkiss, I.T. visited the subject site and surrounding area
several times during April, 1995, as described in the site visit table below. TABLE 2 SITE VISITS -ADDISON AIRPORT TUNNEL PERSONNEL DATE PURPOSE V. Zepeda April 12, 1995 Drive airport
vicinity ! : V. Zepeda, T. Hotchkiss April 13, 1995 Meet wI Mr. Morales, review aerials , T. Hotchkiss April 19, 1995 Meet wI Morales (postponed) i V. Zepeda, T. Hotchkiss April 20,
1995 Meet wI Mr. Morales, 30 minute FAA AOA Safety course, drive airport T. Hotchkiss April 26, 1995 Site Reconnaissance, photos V.1.a Immediate Vicinity Photographs were taken during
the April 26, 1995 site reconnaissance by Mr. Hotchkiss. The site was observed to be generally as described in previous sections, although access was not gained to the majority of the
site proper due to on-going air operations. Four fuel tankertrucks (approximately 3000 gallon) painted with Phillips 66 markings were observed on the apron adjacent to the Beechcraft
hangar, approximately 500 feet west of the proposed East Portal (Titled "Figure 3, HNTB" Appendix D). Please refer to Photo 1. At the eastern end of the Beechcraft apron, against the
chain-link fencing, were several drums with undetermined contents. These may provide intermediate storage for spent solvents and other unknown liquid waste generated by the facility
as part of their operations. Texas Turnpike Authority 17 June 12. 1995 Environmental Site AsseSSment Phase I 
A tanker truck, similar to those described above, bearing Stern Air markings, was located in the farthest northeast corner of the Jetway (formerly Stern Air) parking lot, very near station
25+00 on the above referenced Figure. At the north end of Hangar Six, immediately south of Jetway, an above ground storage tank (approximately 250-gallon) was located, see Photo 2. Most
of the hangers presently in the proposed ROW are occupied by either aircraft or miscellaneous private storage facilities of an unknown nature. These hangers were observed to be occupied
by numerous boxes, files, miscellaneous shelved materials of undetermined nature, etc. Outside these buildings, numerous steel drums were observed, their contents and purpose undetermined,
but one of them was stenciled "JET -A", see Photo 3. Although probably used for general refuse containment, they may be temporary storage for solvents, degreasers, spent or excess fuels,
etc. and could be considered as potential sources of environmental contamination. Several facilities located adjacent, or very near, to the southwestern corner of the Addison Airport
property are, or have been, in light to heavy industrial use. These include: Plastech Corp. 15606 Wright Bros. Toxic Release Inventory, SSTS Prestolite 41 03 Lindberg Toxic Release Inventory
Details, Ltd 15508 Midway RCRA small quantity gen., transporter Image Ind 4213 Wiley Post RCRA small quantity gen. Intemational Auto 15605 Wright Bros. RCRA large quantity gen., transporter
Midway Press 4319 Lindberg RCRA large quantity gen. I WO Bankston 4300 Lindberg RCRA small quantity gen. Circuit Automation 3970 Lindberg RCRA large quantity gen., violator 􀁔􀁥􀁾􀁡􀁳􀀠TurnpIke
Authority 18 June 12. 1995 Environmental Site Assessment Phase I 
I The Addison Airport fuel farm is located at the southeast corner of Addison Airport proper, fronting on the west side of Addison Road, south of Roscoe Tumer. A review of current TNRCC
Underground Storage Tank Listing records revealed 31 registered USTs at the facility. It should be noted that the address for these tanks was reported as that of the owner, not the physical
location of the tanks. The site visit revealed 31 snorkels, apparently confirming the presence of that number of tanks. Photos 12 through 14 depict the various tank groups, each owned
and operated by separate entities, within the general area of the fuel farm. Several documented leaking tank removals, piping upgrades, and tank overfilling accidental releases have
been associated with this tank farm. These accidental releases have reportedly been remediated with the knowledge of the TNRCC, but absent from the many corrective action, site remediation,
and enforcement action plans reviewed were any type of groundwater contamination or hydrogeologic characterization study. The exception to this was a Phase I Hydrogeologic Investigation
prepared by ATEC on behalf of Aviall and the Addison Airport in January, 1988. This investigation apparently focused on the northernmost group of tanks, now evidently owned by Cornerstone
Fuels. The investigation included twelve soil borings (five of which were converted to monitor wells) and none encountered water during the boring activities. After some time, the wells
were observed to have one to two feet of water in the wells, which the author explained as the result of recent heavy rains. No hydrogeologic conclusions were drawn from this observation,
or any others during in the entire study. It was noted that highly elevated levels of petroleum hydrocarbons were observed in the soils from almost all borings, most notably a concentration
of 1340 ppm in a boring approximately 50 feet northwest of the tank hole. This indicates that contamination was clearly not confined to the tank hole as originally thought. Neither the
source nor the extent of the contamination was characterized. It was also noted during the site visit that two capped surface completions, apparently tank access pipes, were observed
within the Jetway (Stern Air) compound at the fuel farm. These may be the two 12,000 gallon tanks reported to be in violation of the tank closure rules noted from the records review.
Monarch Air, at 4580 Claire ChennaUlt, reported the removal of a 250 gallon used 011 and solvent underground storage tank in July of 1994. This address is listed in the TNRCC Underground
Storage Tank Listing Texas Turnpike Authority 19 June 12, 1995 Environmental Site Assessment· Phase! 
database as Campbell Aviation Services, although Monarch Air is listed in the local telephone directory at the address given above. Addison Aircraft Storage is reported to have two underground
storage tanks at 4584 Claire Chennualt. Addison Aircraft Storage and Monarch Air correspond to hangars No. 63 and 64 respectively on the Airport Layout Plan (Greiner, February, 1993).
Several printers and what appeared to be a large janitorial supply company are located on Keller Springs immediately east of the subject property. No RCRA or State listings for these
facilities were noted during the database research. V.1,b Surrounding Area Several hundred feet north of the eastern end of the proposed toll tunnel are located several light industrial
facilities in the vicinity of Glenn Curtis and Ratliff Roads. The facility, identified from aerial photography, located at the northwest corner of Glenn Curtis and Addison Road was observed
to be a vacant lot with distressed vegetation, Mr. Neal Gayden (City of Addison) identified the facility as United Contracting. No other heavy industrial activities were observed at
the eastern end of the proposed tunnel location. The western portion of the proposed tunnel location is also in a heavily industrialized area, especially to the south and west. All development
in the project area adjacent to Keller Springs west of the West Portal ("Figure 3, HNTB, Appendix D") appears to be light commercial and retail in nature, with the majority being offices,
However, the nature of the empty lot immediately northwest of the West Portal (at the northwest corner of the Dooley Road/Keller Springs intersection) is unclear. It was observed to
have several large, concrete structures that appeared to be Sidewalks or some other parking-related use. Photo 4 depicts an east-southeasterly view of this property. Mr. Don Lookadoo,
a real estate broker representing EKL Realty Partners, the site owner, was queried about the site history. but could only offer that a previous owner had attempted to develop the lot/site
for commercial use. He could not comment on the presence or absence, at any time, of USTs or other chemical storage facilities on the site. Immediately north of the vacant lot is METCO,
an undetermined, apparently retail venture and several automotive repair facilities, including Fast Eddy's Auto Shop, Allen's Towing Service and Auto Storage Lot, an un-named Auto Body
Shop, and Royale Auto Service, Texas Turnpike Authority 20 June 12, 1995 Environmenta! Sile Assessment Phase I 
North of these, also on Dooley Road, is what appears to be a construction equipment storage yard. More than two dozen unmarked drums were observed in this fenced-in yard, see Photos
5 and 6. Surface water drainage from ali these areas is to the north, away from the project site. Farther north-northwest, at the northeast corner of Keliway Circle, a debris pile containing
what appeared to be varying amounts of soil, concrete, tires, and other demolition debris was observed between the airport boundary fence and an unnamed warehouse parking lot, see Photo
7. Immediately east and south of the debris pile is a construction equipment storage yard, including an apparent aboveground storage tank, enclosed by an approximately eight foot high
wooden fence, see Photo 8. This yard may belong to Housley Communications, who occupies part of the building fronting on Keliway Circle, near the entrance to the yard. Approximately
400 feet south-southeast of the West Portal is the Addison Airport Air Traffic Control Tower (ATCT). In 1989, the FAA removed a 500 gallon UST from the ATCT, probably the fuel supply
for an emergency generator. According to the TNRCC regional inspector, there had been no apparent release of fuel from the tank. Approximately 600 feet south of the proposed Toll Plaza,
generally between Midway and Dooley Roads is an industrial-appearing facility, N. J. Nalin. This facility was not listed on the database search and had no outward appearance of environmental
threat A listing for American Coldset at 15879 Midway may refer to this facility. American Coldset is listed as a small quantity generator of hazardous waste. Approximately 300 feet
northwest of the Keller Springs/Midway Road intersection is Service King Collision, an automotive repair shop listed as a small quantity generator of hazardous waste on the RCRIS database.
No enforcement actions or violations were reported against this facility. About 500 feet north of Service King on Midway is located Midway Auto Painters. This facility did not appear
on any any of the regulatory files reviewed. Both facilities are topographically downgradient from the project site. To the west of Midway Road on Keller Springs, there are several retail
and light commercial businesses, including two printers. One, Spinner Printing, is listed as a small quantity generator of hazardous waste. The other, Prestige Printing, is listed as
a Texas Turnpike Authority 21 June 12, 1995 Environmenlal Site Assessment -Phase I 
I Conditionally Exempt Waste generator. Both facilities are topographically downgradient from the project location. Also near these facilities is the Gammon Group, a circuit board manufacturer
with no regulatory history of violations, although this type of facility regularly generates small quantities of hazardous wastes. Arctic Insulation, several hundred feet south of the
Midway/Keller Springs intersection at 2105 Midway, is listed as RCRA transporter of waste from its own facilities. It has no record of violations on the databases reviewed. Near this
location are two cosmetics manufacturers, Beauticontrol Cosmetics (3311 Boyington) and Jeri Jacobus Laboratories (2101 Midway). The former facility is listed as a small quantity generator
of hazardous waste while the latter appears on the FINDS database as being listed on the EPA civil judicial enforcement docket. Several attempts were made to contact this facility for
further information, but they could not be reached. Approximately 800 feet south of the proposed project on Dooley Road, an un-named building/hangar corresponding to building No. 92
on the Airport Layout Plan (Greiner, February, 1993) was observed with an aboveground storage tank and three snorkels indicative of three USTs, see Photo 9. On the Airport Layout Plan,
building No. 92 belongs to Beltway Construction and this facility is crosslisted with Beltway Construction on the Petroleum Storage Tank Database as Beltway Development Co. at 4055 Dooley.
This record also indicates that three USTs are associated with this facility. This facility is referred to as the Beltway Development Service Center in the local phone directory, Farther
south and west of the proposed project site are many large industrial manufacturing operations, several of which have been under State enforcement for RCRA violations. The known RCRA
violators are all more than a half mile from the project site and are downgradient topographically. Those facilities with an enforcement record are: TXD007507775 AER MFG INC 3420 WILEY
POST RD CARROLLTON TXD981 052277 AER MFG INC 1605 SURVEYOR BLVD CARROLLTON TX0000817924 AER MFG INC 3325 WILEY POST RD CARROLLTON TXD030156871 TEXAS FINISHING CO 1801 SURVEYOR BLVD CARROLLTON
TXD021675673 CIRCUIT AUTOMATION, INC 3970 LINDBERG DR DALLAS (ADDISON) Texas Turopike Authority 22 June 12, 1995 Environmental Site Assessment -Phase! 
The violations are described in the database search as "Generator-All Requirements", usually referring to permitting of non-permitted operations. A review of the State files confirms
that these facilities were operating at one time outside of RCRA permitted standards. No enforcement actions were noted for unauthorized discharges of hazardOUS wastes. A facility that
appeared as an equipment yard in historical aerial photos at the southeast corner of Midcourt and Chennault in Carrollton is now a grassy mound. No historical information could be ascertained
to evaluate the site. Forney Corporation, at 3405 Wiley Post, was observed to have many drums of un-identified waste behind its manufacturing facility, near its igniter testing facility,
see Photos 10 & 11. At Plastech, 15606 Wright Bros., a 1,000 gallon tank was removed and reported to not be leaking by Mr. Buck Stout, Vice President of Petko Construction of Addison.
There are many RCRA facilities located in an industrialized section between Midway Road on the east and Surveyor on the west in Carrollton. For brevity, these are not listed here and
according to Mr. Hudson (see following sections) these are generally considered to be environmentally benign. Several other leaking tanks were located within one mile of the subject
property, see Figure 6. Other than the Addison Airport tank farm, the C-Store, at 16601 Addison Rd., is the nearest reported LPST to the subject property. This facility was identified
by Martha Britton of the TNRCC Region 4 office as weli as a Phase 1111 report provided to HDR by Mr. Edward Morales, Operations Manager of the Addison Airport. From review of these sources,
the C-Store appears to have discovered leaking UST piping which was replaced in April, 1993. The facility is stili under a TNRCC order to perform a site characterization, although no
report was located in the facility files nor did Ms. Britton have any knowledge of ongoing enforcement at the site. V.2 Interviews Mr. H_ Wayne Ginn. P.E .. consulting engineer Mr. Ginn,
former Town Engineer for Addison and prime consultant to the Addison Airport, was contacted to ascertain his knowledge of underground storage tanks, Texas T utnplke Authority 23 June
12. 1995 Environmental Site Assessment -Phase I 
I surface spills, or other significant impairments to the project site. He had no knowledge of leaks or U.S.T's within the study area. The closest spill which he remembered was at the
corner of Roscoe Turner Dr. and Addison Rd., he indicated that the airport's tank farm was at the southeast corner of the facility, immediately north of the Addison Post Office. He indicated
that Mr. Stuart or Mr. Morales of Addison Airport would be the persons responsible for environmental compliance issues at the airport proper. Mr. Edward Morales, Assjstant Operations
Manager. Addison Airport Spoke to Mr. Morales concerning the same issues outlined above. He has been at the airport since approximately 1970 and stated that there have never been any
PST's of any type on the airport other than the fuel farm located at the southeast corner as described by Mr. Ginn. Several conversations were held with Mr. Morales to confirm that,
to his knowledge, there were no past storage tank leaks or other impairments that might affect the proposed work. Mr. Sam Stuart. Operations Manager. Addison Airport Mr. Stuart is the
son of the airports founder and was contacted to gain his knowledge concerning historical issues. He deferred to Mr. Morales for all issues concerning environmental compliance. Mr. Neal
Gayden. Town of Addison Envjronmental Health Inspector Mr. Gayden was contacted to ascertain his knowledge of underground storage tanks, surface spills, or other signiiicant impairment
for the proposed work area. He stated that there have been many surface spills at the Addison Airport Tank Farm. He also indicated that there have been multiple tank replacement operations
at the facility. Mr. Gayden informed HDR that tanks installed into the competent bedrock in the area were not a threat to the environment because the rock was essentially impermeable.
Texas Turnpike Authority 24 June 12, 1995 Environmental Site Assessment· Phase I . .I, 
The leaking lines at the "Mr. C" store at 16801 Addison Road were also characterized by Mr. Gayden as not being an imminent threat due to the relatively small and confined nature of
the release. He confirmed the presence and ongoing replacement of tanks at the '7-11" store at the corner of Addison and Arapaho Roads, and brought to our attention the former Ashland
Chemical site near the corner of Arapaho and Quorum, where that company reportedly operated several storage tanks. However, Mr. Gayden did not know the type or contents of the alleged
tanks. He did indicate that several Phase II investigations of the site had been conducted apparently for the purpose of developing the land for a hotel, but that no construction was
planned in the near future. Mr. Gayden indicated that the Elfab site southwest of the airport, near the Carrollton industrial district, had undergone groundwater remediation in the late
1980's. Apparently, the facility produced printed circuit boards and had contaminated the groundwater with copper sulfate. Mr. Gayden stated that the remedial effort was completed in
1989. The current location of the Mayflower trucking depot had, for as long as Mr. Garden could remember, always been some type of trucking operation and had never been used for heavy
industrial uses. He also stated that the structures revealed in aerial photography between Ratliff and Glenn Curtiss, west of Addison Road, were quonset huts owned by a construction
company, perhaps United Contracting. Mr. Scott Hudson. City of Carrollton Environmental Health. Industrial Inspector Like Mr. Gayden, Mr. Hudson was interviewed to gain his knowledge
of historical potential sources of environmental contamination in the Carrollton industrial sector west and southwest of the Addison Airport. He stated that Texas Finishing had several
enforcement problems, mostly concerning poor management practices and records keeping. That facility apparently discharges wastewaters to the City septic sewer, with a record of permit
violations for exceeding exceeding pollutant limits. They also are operating under an air permit and utilize an afterburner. Texas Turnpike Authority 25 June 12. 1995 Environmenlal Site
Assessment· Phase I 
I I i I j Mr. Hudson also commented on several other Carrollton facilities, including Forney Engineering, which produces diesel fueled igniters for coal fired power plants. He indicated
that they had storage violations for fuel tanks in 1992 and operate under : I an Air Standard Exemption for igniter testing purposes. Apparently, there have \ J been many complaints
when the igniters fail and diesel fuel is released to the air. '1 " , Concerning AER manufacturing, Mr. Hudson said that despite minor sanitary sewer industrial discharge violations
he was not aware of any major environmental violations. He did mention that they have historically had State violations for various record-keeping and other requirements concerning solvents
and metals. Homelite Services was reported to have a minor LPST cleanup that was confined to surface soils. The Steve King Auto shop, north of the airport, was reported to have minor
PST and surface discharge violations. Ms. Jackie O'Neil. Jetway Incorporated (formerly Stern Air) Ms. O'Neil was interviewed in person regarding the presence of USTs at Jetway (Stern
Air). She informed us that, to her knowledge, no USTs were allowed on the airport proper and that Jetways tanks were in the Addison Airport fuel farm. She indicated that aI/USTs associated
with the airport were in the fuel tank farm at the southeast corner of the airport. She also went informed us that Jetway did use small amounts of industrial solvents and other chemicals,
but that these were temporarily accumulated onsite until their removal by an EPA-registered hazardous waste hauler. Mr. Doug Thompson. Operations Manager. Texas Utilities Mr. Thompson
indicated that, to his knowledge, there were no spills of PCB containing material, or other controlled substance, by Texas Utilities near the Addison Airport. Texas Tumpik& Authority
26 June 12, 1995 Environmental Site Assessment· Phase I 
Ms. Carolyn Beard. Texas Finishing (Baker Metal Prodycts) Ms. Beard could not be reached by phone for comments regarding reported RCRA violations. Several massages were left with her
assistant. Mr. Rex Rayfield. Plastech Like Ms. Beard, Mr. Rayfield also could not be reached despite several attempts to contact him. Mr. Jerry Wisenhower. prestoltte Mr. Wisenhower
indicated thai Preslolite no longer operated that facility. but that it had some time ago. The predominate activity was the assembly of various types of machinery. He could not address
any potential environmental concerns regarding the facility other than to say that it had not been under regulatory enforcement. Shan Parekh. Yoplait Mr. Parekh also could not be reached
as Yoplait no longer uses the facility. Mr. Rich Linamen and Mr. George Sarek. Lachel & Assoc.s. Inc .. Consulting Engjneers Mr. Linamen and Mr. Sarek described the results of the geotechnical
investigation program. Eighteen exploratory borings were drilled to determine the geologic conditions along the proposed tunnel alignment. The geologic profiles for the west and east
portal areas developed by LAI are attached (Appen. C). The geologic interpretation which they provided is specifically focused on the proposed ROW. They also provided a subsurface interpretation.
which was very helpful in estimating the possible impacts of spills and leaks affecting the ROW. Prior to this meeting and discussion, several facilities located east and west of the
portals were identified as possible areas of concern, which could affect the ROW purchase. Texas Turnpike Authority 27 June 12. 1995 Environmental Site Assessment -Phase I 
We discussed the impacts of possible subgrade contamination flowing from the various facilities described as Areas of Concern in Sections IV and V and compared these to the geologic
conditions. Between the portals the alluvial is approximately 1 foot in depth lying atop the Austin chalk formation, with the crown being approximately center. This would provide good
drainage away from the crown, toward both the east and the west. Possible impacts to the west portal appear to be minimized. The west portal was described as having a deeper alluvium
and a subgrade providing drainage away from the portal and the proposed ROW, in southwesterly direction. The soils west of the west portal have been described as consisting of a top
layer of 5 feet of alluvial grading to residual and underlain by 8 feet of moist soft medium plastiCity clays. The soils east of the east portal have been found to consists of 1 foot
of soft clays (top layer), 9 feet of stiff clay (underlying the top layer), underlain by 3 feet of weathered weathered limestone, all considered as residuals on top of unweathered limestone.
Further east toward Addison Road, it appears as though the layering of soils consists of 5 feet of upper clays with 3 feet of weathered chalk, possibly causing a tub effect for any subgrade
liquids east of Addison Road. VI. Findings and Conclusions Based upon a cursory review of environmental regulatory databases, site visits, and other readily available materials the project
site appears to have been in industrial use (airport " operations) for over 35 years. Also, the areas in the vicinity of both ends of the project site are heavily industrialized. Due
to limited knowledge of subsurface conditions, the potential for impact to the project site by subsurface contamination from offsite facilities cannot be fully estimated, but the route
lor potential migration appears to exist. Because the area has been industrialized for at least 30 years prior to the developmer'l! and, implementation of safe hazardous materials and
petroleum petroleum product handling practices, it cannot be concluded that there have been adverse environmental impacts without further investigation for the presence of subsurface
contamination. The ROW exhibits no outward indications of serious environmental impairment: and this investigation has not identified any environmental impairment that would cause. us
to recommend the Authority not purchase theseproperties. However, only through'more t: Texas Turnpike Authonty 28 June 12, 1995 Environmental Site Assessment· Phase I 
exhaustive research, sampling and site history review can an opinion with respect to adverse environmental impacts be prudently rendered. Many of the documents reviewed concerning operations
of facilities in the vicinity of the ROW were not available and many of those that could be reviewed were incomplete. Several reports were in conflict with each other, as was some of
the information supplied by those people interviewed. Therefore, we recommend that prior to development of these properties the following activities be undertaken: • Obtain water quality
samples from existing piezometers (installed by LAI). • Develop a phase II sampling (intrusive) program, testing for hazardous substances and petroleum products on the subject property
• east of the runway to Keller Springs Rd., in and around the various buildings which will be displaced, • directly south of the construction storage area identified in Section IV.3.1,
west of the runway, • south boundary of the ROW. west of the west portal directly north of the property identified as Building No. 92 (Greiner Report), shown in Photo 9 and described
in Section V.1.b of this report, and • construction materials storage area immediately west of the airport, north of the proposed ROW. • A Title survey reflecting the subject property(s)
for at least fifty years. • General cleanup by current owners to include removing all containers, tanks, drums, scrap and debris from the property which are not currently necessary to
the operation. Further inspection of surface debris may identify additional hazardous materials which may lead to additional information regarding past' disposal operations and management
methods conducted on site. Texas Turnpike Authority 29 June 12. 1995 Environmental Site Assessment -Phase I 
• Asbestos Investigations to examine the interior 01 the hangars and buildings for asbestos containing materials. The presence or absence of subsurface contamination cannot be determined
from this study, but the present facility and surrounding land uses warrant caution prior to ROW acquisition. VII. Signatures of Environmental Professionals Troy Hotchkiss, EI.T. Texas
Turnpike Authority 30 June 12, 1995 Environmental Site Assessment Phase I w 
-: , . en w ..J m .<C I-
Table 1 􀀬􀀺􀀮􀀻􀁾􀀧Database Survey CityStreet AddressFaeility Zip109H-code EPAF-code S-cod. W-cod.R-cod, IT-cod. P-eod, L-codE ..-.' Carrollon3420 Wiley Post Rd . 750067507775 AER MFG
INC (RCRA violator) TXDRl Fl P10 1605 Surveyor Blvd • Carrolloo.:·"' . 981052277 AER MFG INC 75006TXDR2 P9 CarroltonAERMFG INC 3225 Wiley Post Rd 75006817924H4 TXDR3 F2 2105 Midway Rd
Carrolton92943612 Arctic Insulation 75006R54 TXDFS 988074118 Beauticontrol Cosmetics Inc 3311-400 Boyington Carrolton 75006TXDR4 F5 H5 3333 Earhart Dr Ste 380 CarroltonTXD 981913700
Eurocare Autoworks Inc 75006R5 F7 3151 Skylane Dr Ste 104 Carrolton981058233 Eurowerks Inc 75006TXDR6 F8 Forney Corp 3405 Winey Post Rd Carrolton4939738S 75006H8 TXDR7 F9 3237 Commander
Dr Carrolton981592959 Frito-Lay Inc Carrollon QA 75006TXDR8 FlO 2530 Tarpley Rd Ste 500 Carrolton982563603 Genesis Circuit Inc 75006TXDR9 F12 2017 SurVeyor Blvd· CarroltonInternational
Auto Repair 75006TXD 981151954R10 F13 Carroltan56379615 Mix Printing Company 2000 Surveyor Blvd TXD 75006Rl1 F15 2441 Midway Rd Carrollon981901721 Mix Printing Company Inc. 75006TXDR12
F16 Carrolton3330 Keller Springs Rd Ste 220 57356 Prestige Printing Inc. 75006TXDR13 F17 2389 Midway Rd Carrolton102606746 Savin Corp 75006TXDR14 H2F19 Service King Collision 2309 Midway
Rd Carrollon 75006986039699TXDR15 F20 3330 Wiley Pas! Rd Carrolton 75006778670 Sham'n Williams Co. TXDF21RI6 Spinner Printing Company 3335 Keller Springs Rd Ste 130 Carrollan 75006981156532RI7
TXDF22 982290062 Sieve Kings Automotive$ 3151 Skylane Dr Ste 108 Carrolton 75006TXDR18 F23 P6 Ll 3152 Skyl.ne Dr Ste 101 Carrolton 75006TXD 988019832 Team Mad Dog Racing F25R19 3400
Wiley Post Rd Carrollon 75006TXD 77617769 Technicon Instruments corporation R20 F26 Texas Body Works 2415 Midway Rd Ste 111 Carrotton 75006TXD 981155583R21 F27 1801 Surveyor Blvd CarroltonH7
30156871 Texas Finishing Co. (RCRA violator) 75006TXDR22 Tl F28 3325 Wiley Post Rd CarroitonTXD 982291403 Tom Pierce Body Works Inc. 75006R23 TXD 981058423 3151 Skylane Dr Ste 107 Carroiton
76006Tru-Colors Concepts R24 F30 TXD 72610736 Watkins Ornamental Iron Inc. 3212 Skylane Dr Carraiton 75006R25 F31 75113043 1605 Surveyor Blvd Carrolton 75006TXD Xerox Corp R26 F32 1649128
15879 Midway Rd TXD American Coldset Corp Dallas 75244R27 3970 Lindberg Dr TXD 46981866 Carterphone Electronics Dallas 75244RZ8 21675673 Circuit Automation Inc (RCRA violator) 4132 Lindberg
Dr TXD Dallas 75244R29 F33 15101 Midway RdTXD 59761544 Dallas North Office Supply Inc Dallas 75244R30 F35 51108330 Details lid 15508 Midway Rd Dallas 75244R31 TXD TXD 508540041 4124
Billy MHchell Dr 75244Displaytek Corp DallasR32 41089491 Elfab Corp 4200 Wiley Post Rd 75244PI8 TXD DallasR33 4112 Billy Mitchell Dr TXD 11965 75244Fibergate Corp .. DallasR34 note:
Database information reftects data as reported to HDR by OATASITE ONLINE SERVICES. R-code lor RCRA : T-code lor TRI; F-code lor FINDS; P-code for Petroleum Storage Tanks; L-code for
Leaking Tank Sites, S-code for Spill Incident Sites; W-code for Municipal Solid Wasle Records; Records; H-code for Hazardous Material Siorage. Prepared by HDR ENGINEERING. INC. 5131195
Page 1 
Table 1 􀀬􀁾􀀬􀁾􀀧􀀺􀀠Database Survey cliVStreet Address ziPFacilitvEPA 10 #W-ood. H-codS-codR-cod, T-cod, F-code P-cod, L-cod, ."" " Dallas 752444159 Billy Mitchell Dr. 4213 Wiley Post
Ad 50133669 Graco Inc TXDRS5 75244Dallas" '""64144538 Image Ind 15605 Wrighls Brothers TXDR36 75244DallasInternational Auto Repair Dallas 981053531TXDRS? 752443907 Lindberg Dr Dallas
981514482 J&J MfgTXDR38 752444201 Kellway Circle Dr Dallas leU Bros Aulo Complex 981058332TXDRS9 752444319 Lindberg Dr Dallas Midway Press 988040242TXDR40 F36 752444103 Billy Mitchell
Dr 75244 Quest Medical Inc TXD 988038253R41 F39 14330 Marsh Spgs Valley Dallas 75244 988031621 Taylor Exxon TXDR42 16304 Midway Rd Dallas R44 Tru-Colors Concepts Inc TXD 981058415R43
F40 Dallas 75244 R45 4300 Linberg Dr WO Bankston Body Shop 982283848TXD Dallas 75248 Dallas 16528 Westgrove DrAir Systems Inc TXD 988019378F42 752484321 Airborn Dr R4? Airborn Inc TXD
987981792R46 Dallas 75248 15840 Addison Rd 4904 Arapaho RdAshland Chemical CoTXD 829366 Dallas 75248Autohaus Hans Inc TXD 988058889R48 Dallas 7524816423 Addison Rd Dallas 988034427 Dojdea
Addison Facility TXDR49 752484300 Westgrove Dr Dallas Million Air 766337TXDP33R50 F43 752484575 Claire Chennault SI Dallas Rockwell International 187354147TXDR51 752485304 Arapaho Rd
Dallas 980748784 Shell Service Station H14 TXDF44 L5R52 P29 752484553 Keller Springs Rd 75244 988061206 Stern Air TXDR53 F45 15606 Wright Brothers Dr Dallas 75244 988078507 Plaslech
Corp TXDT2 F38 Dallas T4 4103 Lindberg Dr Prestolite Electric Inc TXDT3 75244 75006 Dallas15100 Midway Ad Yoplait USA TXD 988058574Hl0F41 Carrolton F6 2017 Surveyor Blvd Barrier Chemical
Corp 987970142TXDF4 Carrolton 750062155 Marsh Ln 106 Counlry Express Cleaners 117452987TXD Carroiton 75006 F14 3330 Keller Springs Rd Sle 200988065348 Gammon GroupTXDF11 75006 F18 2101
Midway Ad CarroltonJeri Jacobus Lab Inc TXD 168595189 Carrolton 75006 F24 3312 Wiley Posl RdQuest Medical Inc TXD 21675699 75006 F29 Carrollon2217 Marsh lnTXD 51202836 Stylecra« Cleaners
Carrollon 75006 F34 1605 Surveyor Blvd Texas Instruments TXD 981052277 75244 F37 4130 Billy Mitchell Dr Dallas13159074 Con Trac Packaging Inc TXD Farmers Branch 7524415404 Midway Rd
Pak It Cuslom Packaging Co TXD 980489397 75006 P2 Carrolton3350 Boyington Dr Budget Rent a Car Co TXDPl 75006 P3 Carrol1onJiffy lube 􀁾􀀶􀀴􀀲􀀠1610 Marsh Ln TXD 75006 P4 Carroiton2210
Marsh Lane TXD 7 -Eleva n #25436 H3 75006 P5 Carronon2625 Midway Rd Jiffy Lube #823 TXD Carrolton 75006 P7 2085 Midway Ad TXD Compass Compuler Services Inc 75006 P8 Carranon1900 Surveyor
Blvd Hornelite Division of T exlron TXDL3 750062800 Surveyor Blvd CarrollonCtx Builders Supply TXDL2I Prepared by HDR ENGINEERING. INC" 5/31/95 Page 2 
Table 1 .',";;;:-'Datllbase Survey Cltv ZipStreet Address -􀀮􀁾􀀠.' .. Pll 10 It FacilitvH-cod. EPAT-cod, F-code P-cod,A-cod, L-cod. S-cod W-cod' 4191 Belt Line Ad Dallas 75244RAS #6-0275
(Exxon) TXO ._.4055 Belt Line Ad' Dalias 75244SSBAP12 Dalias 7524415800 Dooley Ad Beltway Service Center P13 Dallas4204 Lindberg Dr 75244 P15 American Transler & StorageP14 15200 Midway
Ad Dallas 75244 P16 Coca-Cola Bottling Co. of N. T.H12 15510 Midway Rd Dalias 75244 P17 Educational Tours Inc 15465 Midway Rd Farmers Branch 75244 P19 Peer Services 15605 Wright Brothers
Dr Dallas 75244 P20 Rod-Mar Inc 75248 P21 15209 Addison Rd DallasWaterworks Car Wash Addison Rd Dallas 75246 P22 Texas Pro Air 15804 Addison Rd Dallas 75248 P23 Avis Rent a Car 15280
Addison Rd Ste 300 Dallas 75248 P24 Beltway Development Co Addison Airport Dalias 75248 P25 Sternair Inc 15409 Addison Ad 75248 P26 DallasAddison Airport Dalias 752484798 Airport Pky
Central Fire Station 5403 Arapaho Rd Dallas 75248 P28 7 -Eleven #22948 H15P27 752485402 Arapaho Arapaho Rd DallasMontgomery Ward L6 4580 Claire Chennault 51 Dallas 75248 P31 Campbell
Aviation Services Inc P30 4584 Claire Chennault St Dallas 75248 P32 Addison Aircraft Storage 75248 P34 4788 Roscoe Turner St OailasAddison Airport 752485201 West grove Dr DallasSent
Tree Country Club Golt 16601 Addison Rd 75248 S1 DallasC-Slore ITom WetchL4 Carrolton 75006 S2 2395 Midway Rd Computer Language Research Carrolten 75006 S3 1601 Marsh Rd Texas Power
& Light 4505 Claire Chennault St Addison 75248 84 Aviall 75248 S5 4585 Claire Chennault St AddisonAviall 75248 W1 Addison15500 Addison RdGroendyke Transport Inc 75006 W2 Keller Springs
Rd CarroltonKeller Splings Landfill 75244 HI 4345 Lindberg AddisonEnviro-Waste Mgt 75006 HS 3405 Wiley Post Rd CarroltenForney Eng Co 75006 H9 2399 Midway Rd CarroltonCarlisle Synlec
Systems 4125 Keller Springs Rd Ste 144 Dalias 75244 Hl1 American Medical Electronics 15700 Midway Rd Dallas 75244 H13 Ail-Plastics Moldings Company 4103 Lindberg Or Addison 75244 HIS
Megatren Ind (formerly Prestollte) 75248 H17 4570 Weslgrove #210 AddisonDSC Communications Corp 75248 H18 4805 Arapaho Rd AddisonLogic Design Metals. Inc 75246 H19 16801 Westgrove AddisonTown
of Addison Service Center Dallas 752464400 Glenn Curtiss Dr 􀁾􀁣􀁫Beechcraft Inc -Prepared by HOR ENGINEERING. INC. 5/31/95 Page 3 
•, -:1.1. 
) 35E 􀀭􀁾􀁖􀁉􀀭􀁌􀁁􀁲􀁲􀁲􀀭􀀭􀀭􀀭􀀭􀁾􀀫􀁟􀁟􀁟􀀻􀁟􀁟􀁟􀁟􀀭--FERRIS 􀀷􀁴􀁪􀁾􀀭􀀬􀀠TEXAS TURNPIKE AUTHORITY ADDISON TUNNEL ESA LOCA TION MAP "21<:. -􀁾COMBINE'-I J Figure 1 
TEXAS TURNPIKE AUTHORITY -ADDISON TUNNEL E.S.A. May 1995 .. S.C.S. -SOil SURVEY MAP" I Figure 2 HOR EnginHrin.,. Inc. Ref. U.S. Soil Conservation Servk:e. Feb. 1980. 
Scale 1 250.000 ADDISON AIRPORT APPROXIMATE LOCATION 5:========"",,;0i=======:::::i'E'􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀁾􀁉􀁏􀁾􀀽􀀽􀀽􀀽􀀽􀀽􀀺􀀺􀀺􀀺􀀺􀀺􀀬􀁉􀀧􀀬􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀽􀀬􀀲􀀰􀀠S!illo..lll
! Mile'S" 3 20 25 30 Kilometers5 10 ... _. _______ , _.l' -! u __ _ CONTOUR INTERVAL 50 FEET TEXAS TURNPIKE AUTHORITY -ADDISON TUNNEL E.S.A. "GEOLOGIC ATLAS OF TEXAS -DALLAS SHEET" HDR
Env1n••ring. Inc. Ref. University of Texas. Bureau of Economic Geology, Rev. 1987. 1Oete May 1995 I Figure 3 
\ " \'0 :: /􀁾􀀠LOUIS '010 15 /I ! /ADDISON MUNICIPAL AIRPORT I 􀁜􀁾􀀠APPROXIMATE SCALE 1000 0 1000 FeeT 􀀧􀁅􀁾􀁾􀁟􀁌􀀮􀁟􀀽􀁟􀁅􀁾􀀽􀁃􀀽􀁅􀀳􀁅􀀳􀁃􀀽􀁾􀀬􀀽􀀽􀀽􀀽􀀽􀀽􀁾􀀱􀀠"( 􀁾􀀠􀁾􀀠"
"1: " " " 􀁾􀀠"'--ZONES Ul I<1:a: 12a: T 1 ) , I I' , 􀁾􀁉􀀠􀁲􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀁾􀁾􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀁾􀁾􀀢􀀠􀁲􀀭􀁯􀁾..􀁾􀀮􀀭􀀭􀁾TEXAS TURNPIKE
AUTHORITY -ADDISON TUNNEL E.S,A. May 1995 "FLOOD INSURANCE RATE MAP" I Figure 4 Ref, H,U,D, Communily -Parcel # 4810890005 A. July 16 1980, 
:" . . : .. 1000 0 1000 H H H 1 5..... ..... """" HOR 􀁅􀁾􀁦􀁜􀁈􀁲􀁩􀁴􀁜.. tnc:. I , , . /''''''.'''' 􀁾􀀢􀀮􀀠'---'" , ......II 􀁾􀀠______ .--_. '".,..::;... -. 􀁾􀀠􀁾􀁉􀁉􀀡􀁉􀁾􀀢􀀠••-"
a '" R<tdio Or..., 􀁾􀀠••• 􀁾,", r. fII> •••.-, 8 • ... >000 lOOO 4000 SOOO 6000 7000 FEET \ 0 1 KILOMETER Fa ........... Em_ CONTOUR INTERVAL !O FEET \ .' , " " \ " " , \ '. .... /..:
-........ t:ly'.V·••P··· Oato TEXAS TURNPIKE AUTHORITY· ADDISON TUNNEL E.S.A. May 1995 I Figure 5 "U.S.G.S. MAP" U,S, Geological Survey, 1959 photorevised 1981, 
EAST PORTAL .. , -.' N 􀁾􀀠• 􀀬􀁾􀀠C I0 1320 2118Q... . SCALE IN FEET LEGEND EPNRCRA EPNTRI EPNANDS SPILL INCIDENT SITES PETROLEUM STORAGE TANKS lEAKING TANK SITES HAZARDOUS MATERIAL
S1'UIll'(GE MUNICIPAL saUD WASTE RECORDS TEXAS TURNPIKE AUTHORITY ADDISON TUNNEL E.SA May 1995 "RECORD INFORMATION KEYMAP" r. 
I I j PETROLEUM STORAGE TANKS LEAKING TANK SITES HAZARDOUS MATERIAL STORAGE MUNICIPAL SOUD WASTE RECORDS DaleTEXAS TURNPIKE AUTHORITY ADDISON TUNNEL E.S.A. May 1995 "RECORD INFORMATION
MAPNORTH" " eP3 I8IF24 ·. -:-: 􀁾􀀢􀀢􀀠􀁶􀀬􀀬􀁾􀀠.,..'".. .", .. ,.. " . , .. l i j ;e P22 , ..)t-., .. 􀁾.... ,. (::·:f.)tJf'1 "tTV; .181 AS FlO H1S£ R50. F43181 P24 EAST PORTAL 􀁈􀁄􀁁􀁾􀁨􀀺􀀮􀀠N
􀁾􀀠o 800 1600 SCALE IN FEET LEGEND• EPNRCRA is] EPA/TRI EPNANDS SPILL INCIDENT SITES 
N 􀁾􀀠leOO" -= \ t j • LEGEND EPAIRCRA EPNTRI EPAIANDS J SPIlL INCIDENT SITES PETROLEUM STORAGE TANKS I LEAKING TANI< SITES HAZARDOUS MATERIAL STORAGE I MUNICIPAL SCUD WASTE RECORDS
􀁲􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀁾􀁾􀁾􀁾􀁾􀀭􀀭􀀭􀀭􀁲􀀮􀁯􀁾􀁾􀁾􀀭􀀭􀀭􀀬TEXAS TURNPIKE AUTHORITY· ADDISON TUNNEL E.S.A. May 1995 "RECORD INFORMATION MAPSOUTH" r. 
--en w -(.).'0 " z w " Q. :«c.. 1',; 
•. '« -o..,i, 􀁾􀀠W c.. 'c..« " ! x 
"AERIAL PHOTOGRAPH -YEAR 1990" 
::t: a. <tex: .(!l 􀁾􀀠 ::t: a. ,1 . ...J 􀁾􀀠<to. 􀁾􀁉􀀠 
"AERIAL PHOTOGRAPH -YEAR 1975' 
"AERIAL PHOTOGRAPH -YEAR 1971" 
....I a::: « w >J: Cl.. « a::: (!j 􀁾􀀠o J: Cl.. « iE w « i . 􀁾􀀠,J ; , 
; . 1 . I 
Photo 1 -View west from northeast corner of Jetway parking lot. Beechcraft tanker trucks are parked on apron in middle distance and Addison Air Traffic Control Tower is in far distance.
Photo 2 -View west of approximately 250 gallon above ground storage tank between Hangar Six and Jetway. Notice thick, oily spillage on ground immediately right of the. tank. Texas Turnpike
Authority Appen. B Environmental S.te Assessment -Phase I Jt1ne. 1995 
Photo 3 -View north of "Jet Hangers". Notice drums near facility doors. .. Photo 4 -View east from empty lot at corner of Dooley Road and Keller Springs. Formed concrete slabs are in
foreground, drill crew is in middle distance between trees. Texas Turnpike Authority Appen. B Environmental Site Assessment -Phase I June. 1995 
• • Photo 5 -View northeast from behind "construction yard" on Dooley Road. To the immediate left is a drainage ditch flowing north. Photo 6 -View west from Dooley Road of "construction
yard" with drums along the treeline in the distance and a trailer mounted tank between the tanks and sqmi-trailer . . ) Texas Turnpike Authority Appen. B Environmental Site Assessment
-Phase I June. 1995 
Photo 7 -View northeast of debris piles from parking lot behind unidentified warehouse, northeast quadrant of Kellway Circle. Housely Communications (?) construction yard is in middle,
right distance and Million Air is in far distance. Photo 8 -View southeast of Housely Communications (?) equipment yard with storage tank in middle right distance. , . ., Texas Turnpike
Authority Appen B Environmental Site Assessment -Phase I June. 1995 
• • Photo 9 -View north of Beltway Construction (Hanger 92). Notice three snorkels and surface tank behind fence. Photo 10 -View east from northwest corner of Forney Engineering property
depicting drum loading area. Texas Turnpike Authority Appen B Environmental Site Assessment -Phase I June. 1995 
Photo 11 -View southeast of Forney Engineering diesel igniter testing facility for coal fired power plants. Photo 12 -View east of the Cornerstone Fuels fuel tank group at the northern
end of the Addison Airport fuel farm. Texas Turnpike Authority Appen B Environmental Site Assessment -Phase I June. 1995 
• • Photo 13 -View southeast of the Million Air tank group at the Addison Airport fuel farm. Notice unlabelled drums along the fence and on the pump-pad. Photo 14 -View northeast of
the Jetway tank group at the airport fuel farm Two snorkels to the right are not in the picture. Texas Turnpike Authority Appen. B Environmental Site Assessment -Phase I June. 1995 
<. , Photo 15 -View north of typical geologic shallow cross-section taken immediately west. of airfield stormwater outfall culvert, north of Kellway Circle. Texas Turnpike Authority
Appen B Environmental Site Assessment -Phase I June 1995 
" , () " x-0 z " W" 0... 0... « 
GROUND SURF ACE Elr120 638.0 DRAFT TOP OF UNWEATHERED LIMESTONE TOP OF WEATHERED LIMESTONE EIr<107 Elr122 rElr1WEST640 _________ _ 635.0 639.0 638.0 EAST􀁟􀁾􀀠􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀁾􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭􀀭,
, ")-, , '---:i--, , , , ! < <' c .... ' ; ;!;);.. '\; , , , , , ..""""".", , !:,.... ,""', .. " .., , , , , , , , , , , , , Ls , ........... " ...... "-:. ....... " , .. I' , ' __􀁾􀀢􀀢􀀬􀀺􀁟••.",":
,z.· •...• _._. 600 -----.......-....-----------------------ROADWAY CUT 1_ _ _ _ PORTAL SECTION _I TUNNEL SECTION 1l 9+00 9+:75 10+00 11+0'0 12+00 GE.OLOGIC PROFILE -WEST PORTAL NORTH
RNV UNE 11-G) 􀁌􀁅􀁾􀁅􀁎􀁄􀀺􀀠􀀮􀁾C R RE.S1DUAL CLAY;0 '..." WLs WEJllTHERED UMWTONEm Ls UNWEJllTHERED UMWTONE ...lo. DRAFT .)};," , ..' 
DRAFT TOP OF UNWEATHERED LIMESTONE B-112WEST /g640.0 EAST //I' /I' I' I' I' I' I' ////I' I' I' /I' //-" -.'>: -: 􀀮􀀾􀀮􀀺􀀺􀀾􀀺􀀺􀀺􀀿􀀺􀀺􀀺􀁽􀀺􀀺􀀺􀀺􀁾􀀺􀀺􀀩􀀺􀀺􀀺􀀽􀁾􀀺􀀺􀀺􀀺􀀿􀀺􀀺􀀺􀀺􀁾􀀺􀀺􀀺􀀺􀁾􀀺
􀀺􀀺􀀺􀁾􀀺􀀺􀀺􀀺􀀾􀀺􀀺􀀺􀁾􀀺􀀺􀀺􀀺􀁾􀀺􀀺􀀺􀀺􀁾􀀭􀀺􀀼􀁾􀂫􀁾􀀺􀀭􀀺􀀭􀀾􀀬􀀺􀀮􀀧...'. " 􀁾􀀮􀀠ls6l!l__ 􀀽􀁾􀀠TOP OF WEATHERED UMESTONE B-l11 641.0 GROUND SURFACE /////􀀯􀁾􀀯􀁒􀀠/I' I'" "
, " ,", , " TOP OF ROADWAY 􀁾􀁾􀀭􀁾􀀭􀁾􀀠-------TUNNEL SECTION PORTAL SECTION ROADWAY CUTI •• I • • • 25+00 25+50 􀁾􀁯􀁯􀀠2&t,25 .21"00 I I I GEOLOGIC PROFILE -EAST PORTAL ."-NORTH FWV
UNE G') LEGEND: "" .',"' ·A ·ALLUVIAL eLA Y :::u .-' R RESJDUAL CLAY m WLs WEAlTHERED UMESTONE I\.) ls UNWEPITHERED UMESITONE 􀀧􀀺􀀮􀀱􀀧􀀮􀁾􀀠. DRAFT C 
• • o x -o z W 0.. :0.. « 
.. , i f . ! .' 􀁾􀀠, f J I I -I . i 􀁪􀀬􀀭􀁾MIOWAY 􀁾􀀮􀀠.,. PYI $TA. 1.40 EII'I. 035.00 ••• 100'YC ..... 􀁬􀁾􀁴􀀮􀁯􀀢􀀬􀂷􀀠-••• 􀁾T01.L 􀁐􀁌􀀮􀀢􀁚􀀬􀀮􀀺􀁾... .... -_. ... .,. 􀁾􀀠•
• .'h .., ","', ·0 O· ./\",_ .--(/s:. \ ,.': r:l/' ,--. \ '. -'-. ".' 􀁾􀀠L ;, '.-• .,,-1. ___. WEST PORTA\. STA. IJ+U 􀁾􀀠ooot.ev RD; ',ct FUTURE' \ \ \ \. \ \ \, \ 􀀨􀁈􀁏􀁒􀁔􀁈􀁾􀀭􀀽􀀺􀀺􀀱􀁟􀀠.
I TAXIWAY PYllnA. .,. . . I 1-__ :-1 J, ---_lELEv. C30.1I0 􀀾􀀴􀁯􀁡􀀧􀁶􀁾􀀠_--r 􀁾􀁩􀀠-.. Ipvl 􀀸􀁔􀀢􀁾􀀠11·2:6 fOLEV. l5U.t.I.o4".o·ve .. %I$q' I OOR FRAME 􀁾􀁌􀁁􀁒􀀠. , , 􀀮􀁾􀀠,•
EXISTING!RUNWAY I TfJNHEI. -1.0", \ • 4,' • .'''' -. . . EAST POA1'" .. Ii , EXlstlNQ ' .. . . aTA. 1t'+2. '-ADD 􀁏􀁎􀁒􀁏􀀬􀁾l'AXJWA'( <T. I i pvr afA••2.00 IEXISTING 􀁅􀁴􀀮􀁅􀀢􀁾TAXIWAY
. .. I ; 200'VC e••. -!: 1--' ,. ,-IO,tS" 􀁶􀁾􀁬􀀠-t3.00"-: ... -.. .. -,"' . . -r-flVI aTA. U+OO ---'" 􀀮􀀬􀁾􀀠EI.£V • .anAO 100' YO ... .. 􀁾􀀮' .. .--::; ...' .I I .. "..PVI eTA..
203+7& '00' OOOA FRAME GUll aev.ul:!UO I:400"VC 􀁾􀁇􀁕􀁒􀁅􀀠3 .. _. .. . •• ., ....•• :.1:'"''i:J--_..."111=.____ . ,-', 
, · UJ X -o Z LU 0.. :0.. « 
SCOPE OF SERVICES (8119194) ADDISON TUNNEL PROJECT Phase 1 -Site Assessment BASIC SERVICES The intent of the Phase I environmental site assessment is to review readily available documents
and provide an on-site visit for the purpose of evaluating the history of past use identifying sources of potential contaminants, Task I -Literature and Records Research HDR will compile
and review available literature, photographs and available regulatory agency files to: • Review a history of operations and land usage at the site • Review information on any spills,
discharges or other incidence reported to the federal regulatory agencies • Review information concerning the usage, storage, treatment, and disposal of hazardous substances at the site,
• IdentifY areas with potential environmental problems and evaluate the potential impact of these areas on the subject property Task II -On-site visit .. , An on-site visit of the subject
property will be conducted to identify visible evidj:uce of hazardous or potentially hazardous substance and noncompliance areas, The inspection will include a visual assessment of on-site
hazardous material contamination, as :,well as an examination of land use on and adjacent to the subject property, The survey will attempt to identify apparent potential or dormant environmental
impacts, During the on-site visit, no borings will be conducted and no samples will be collected from an,y structures or land either on or off the property, As a result certain conditions,
such 'as those. listed below, may ni{be revealed. • naturally occurring toxics in the subsurface soils, rocks, water, or the toxiCity of the:onsite flora; 
• toXiCity of substances common in current habitable environments, such as, stored household products, building materials, and consumable; • biological pathogens; • contaminant plume
below surface from remote source; • contaminants or contaminant concentrations that do not violate present regulatory standards but may violate future such standards; and, Task 3 -Report
Preparation HDR will prepare a report documenting activities and summarizing findings. The report will include a description of the subject property, development history, and land use;
a summary of the site literature and records search; the results of the on-site investigation; and any recommendations for further action. [n connection with environmental assessments
of a site, only a limited amount of services can be performed within the schedules and budgets available to HDR under agreement with the client. As a result, HDR, despite the use of
reasonable care, may fail to detect hazardous substances or underground tanks or may incorrectly determine the concentration of hazardous substance which are present. ADDITIONAL SERVICES
Information gathered from the records search and site reconnaissance may not be sufficient to assess the likelihood of site contamination due to the presence or proximity of hazardous
substances as well as the health risk associated with the contaminants. Under certain circumstances, it may be necessary to conduct an intrusive site investigation of a scope sufficient
to support a more detailed assessment. The extended (phase 2) investigation would likely include soil and/or water sampling, sample testing and chemical analyses and may ":includeassessments
of contaminant transport, health risk and remedial alternatives. A Phase 4 scope:. of services would have to be developed jointly with the client. COST ESTIMATE A cost estimate has been
prepared and is submitted for your review. The cost is based on a per diem basis with reimbursable expenses. It is provided as a budget only. Should you decide try to use this budget
as a lump sum cost, I would strongly suggest a contingency add on of 10% to 20%.