APEC provides UST management services including UST decommissioning, cleaning and
removal, subsurface investigation, and subsurface remediation.

UST Decommissioning, Excavation, Cleaning & Disposal, and Subsurface Investigation,
Lower Base, Saipan, CNMI:
APEC provided oversight for the decommissioning, excavation,
cleaning and disposal of a 1,000 gallon UST at the Saipan Stevedore equipment and
maintenance facility. APEC performed related subsurface soil and groundwater investigation;
sampling and analysis; subsurface characterization; reporting; and regulatory agency
communication. Client: Saipan Stevedore, Inc.

Remedial Subsurface Investigation: Waste Oil UST Removal Site, Former Dededo Mobil
Service Station, Dededo, Guam:
APEC conducted subsurface investigation activities to
determine the vertical and lateral extent of contamination at the site resulting from a leaking UST.
Activities included historical site research, soil sampling and analysis, and reporting. The site was
subsequently approved for closure by the Guam Environmental Protection Agency. Client: Mobil
Oil Guam, Inc.

Site Investigation, Former Mobil Service Station, Merizo, Guam: APEC conducted
subsurface investigation activities to determine the vertical and lateral extent of contamination at
the site resulting from a leaking UST. Activities included historical site research, soil sampling and
analysis, waste oil underground storage tank removal, and reporting. Client: Mobil Oil Guam, Inc.

Environmental Services in Support of Department of the Air Force, Demolition and
Disposal of Tumon Tank Farms, Guam:
APEC performed environmental oversight and
sampling services during the demolition of the Tumon Tank Farm. Services included preparation
of a site Work Plan and Health and Safety Plan; sampling and analysis of tank contents;
asbestos and lead-based paint sampling and analysis; field oversight of product removal and
tank cleaning activities; soil sampling and analysis, and preparation of a tank closure report.
Client: Serrano Construction and Development Corp.

Remedial Groundwater Investigation at the Former Exxon Service Station, Chalan
Pago, Guam:
APEC conducted an investigation and characterization of subsurface and
groundwater contamination resulting from a leaking underground petroleum storage tank.
Monitoring and remediation activities have been ongoing since the start of the project in 1998.
APEC oversaw the design and installation of subsurface remediation systems including product
recovery, pump and treat air stripping, catalytic oxidation, soil vapor extraction, air sparge and
granulated activated charcoal filtration. Site activities include obtaining groundwater samples and
water levels from 15 monitoring wells and the operation and maintenance of remediation
systems. Responsibilities include coordination with regulatory agencies; oversight of operations,
permitting, and materials procurement; and monthly, quarterly and annual reporting. Client:
ExxonMobil International Holdings, Inc.

UST Decommissioning, Excavation, Cleaning & Disposal; Subsurface Investigation and
Remediation, Saipan, CNMI:
APEC performed planning and project management for the
decommissioning, excavation, cleaning and disposal of an 1,000-gallon fiberglass UST; related
subsurface investigation; and remediation for petroleum hydrocarbons soil contamination. Project
included production of Work Plan, Site Investigation Plan, Sampling & Analysis Plan; oversight of
tank decommissioning, cleaning, excavation, and disposal; soil sampling; reporting of laboratory
analytical results; recommendations for site remediation; and related regulatory agency
communications. Responsibilities for site remediation include oversight of bioremediation berm
construction and maintenance; soil sampling and related reporting; and regulatory agency
communication. Client: CNMI Commonwealth Ports Authority.

Waste Oil Underground Storage Tank Removal and Subsurface Remedial Investigation,
Dededo, Guam:
APEC managed the excavation, cleaning, and removal of a leaking UST at the
Mobil Liguan Service Station in Dededo, Guam. Additional services included subsurface soil
investigation, waste characterization and management, and reporting. Client: Mobil Oil Guam, Inc.
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UNDERGROUND STORAGE TANK (UST) MANAGEMENT
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