Survey

Maersk Energy Inc.
Location: Texas
Description: Ongoing survey services for various pipeline right-of-way locations and staking,
construction staking and as-built records. Additional services include location and layout
staking of production facilities, tie-in location, and location and layout staking of gathering
manifolds.

Amoco Pipeline Company
Location: Texas
Description: Ongoing survey services to locate, re-survey, and update existing as-built
records on various pipelines.

Baltimore Gas and Electric Company
Location: Maryland
Description: Survey services to locate, re-survey, and update existing as-built records on
various distribution supply pipelines.

Gregory & Cook, Inc.
Location: Wyoming
Description: Site survey services to locate and layout stake a gas metering station for tie-in
to an existing pipeline.

Tennessee Gas Pipeline Company
Location: New York
Description: Survey services to locate right-of-way, construction stake, and record as-built
location for various pipeline projects.

Gulf Gas Utilities Company
Locations: Texas and New Mexico
Description: Survey services provided in conjunction with complete design and project
management services on several pipeline projects. Prior to the start of construction, specific
survey services included right-of-way acquisition, permitting, and right-of-way survey
during construction.

Primeco, Inc.
Location: United States
Description: Ongoing real estate survey services associated with the various property
improvement projects for environmental considerations at approximately 70 store locations
in 10 states. Specific survey services include location of all existing utilities and property
improvements and the location and identification of all on-site storage and handling facilities
for SARA Title III regulated substances.

United Gas Pipeline Company
Location: Texas
Description: Survey services to locate right-of-way and obtain alignment centerline profile
for various pipeline projects.

Gulf Interstate Engineering Company
Location: Texas
Description: Survey services to locate right-of-way, construction stake, and record as-built
location for various pipeline projects.

MidCoast Natural Gas, Inc. (Acquired by Enbridge)
Locations: Kansas and Texas
Description: Ongoing survey services provided in conjunction with complete design and
project management services for various pipeline projects. Specific services provided include
right-of-way survey and acquisition, construction permit acquisition, as-built survey and
drawings, and design of associated gas metering facilities.