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Project Manager  
Jeffrey Hart, R.G. 
 
TEC Inc. 
1658 Cole Boulevard 
Suite 190 
Golden, Colorado 80401 
Tel: 303.273.0231 
Fax: 303.273.0235 
jshart@tecinc.com 
 
TEC is completing a Remedial Investigation/
Feasibility Study, Proposed Plan, and Record of
Decision at Waikakalaua Fuel Storage Annex
(WFSA) at Hickam Air Force Base for AFCEE.
WFSA, constructed prior to WWII, consists of
nine 1.75 million-gallon USTs, and underground
and aboveground piping for storage and
transport of aviation and motor gasoline, and jet
fuel from Central Oahu to the base. Previous
investigations identified sludge disposal
locations, four oily-water disposal pits, asbestos-
containing material, and petroleum-contaminated groundwater in the underlying drinking
water resource. WFSA is situated approximately 700 feet above the drinking water aquifer.
TEC installed five 700-foot basal aquifer wells at disposal basins and along the site
perimeter as sentry wells, rather than monitor individual USTs, and developed a portable
groundwater sampling system that saved the government more than $1million. TEC
conducted well inclination surveys to correct errant depth-to-water measurements in
previously installed wells changing interpreted groundwater flow approximately 180
degrees. TEC also evaluated sludge disposal areas and installed vent wells and soil vapor
monitoring points to conduct treatability studies for contaminated subsurface soils at two
oily waste disposal pits. Treatability studies evaluated bioventing versus soil vapor
extraction. Bioventing proved to be more efficient and cost effective at the site. TEC
conducted vadose zone and groundwater
natural attenuation studies to determine plume
stability and an incomplete leachate pathway
rendering additional soil characterization of the
nine USTs unnecessary; saving the US Air
Force over $1 million. TEC completed a
comprehensive RI Report recommending no
further remedial action, which was accepted by
the regulatory agencies. TEC has completed
the no further action Proposed Plan and will
have completed the no further action ROD by
October 2009.
TEC inc is redefining the traditional role of architectural and environmental engineering
firms by helping our clients manage their total relationship with the natural and built envi-
ronment. We offer an integrated suite of architectural, engineering, environmental, informa-
tion technology, facility, and infrastructure management services that are designed to keep
pace with our clients' expanding needs.
 WW II fuel storage
facility
 700 ft monitoring
wells
 15 Mgal storage
capacity
 Drinking water
resource impacted
 Bioventing and
Soil Vapor Extrac-
tion
 Vadose zone mod-
eling
 Groundwater
natural attenuation
modeling
 RI/PP/ROD
Volumetric Conceptual Site Model
Hydrogeologic Cross Section indicating fuel
migration pathways of concern
Helping our clients manage their total relationship with the natural and built environment.
Environmental Site Characterization and Regulatory Compliance Services
US Air Force RI and Decision Documents,
Hickam POL Facilities, Hawaii

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One-Page Waikakalaua CERCLA Omaha

  • 1. Project Manager   Jeffrey Hart, R.G.    TEC Inc.  1658 Cole Boulevard  Suite 190  Golden, Colorado 80401  Tel: 303.273.0231  Fax: 303.273.0235  jshart@tecinc.com    TEC is completing a Remedial Investigation/ Feasibility Study, Proposed Plan, and Record of Decision at Waikakalaua Fuel Storage Annex (WFSA) at Hickam Air Force Base for AFCEE. WFSA, constructed prior to WWII, consists of nine 1.75 million-gallon USTs, and underground and aboveground piping for storage and transport of aviation and motor gasoline, and jet fuel from Central Oahu to the base. Previous investigations identified sludge disposal locations, four oily-water disposal pits, asbestos- containing material, and petroleum-contaminated groundwater in the underlying drinking water resource. WFSA is situated approximately 700 feet above the drinking water aquifer. TEC installed five 700-foot basal aquifer wells at disposal basins and along the site perimeter as sentry wells, rather than monitor individual USTs, and developed a portable groundwater sampling system that saved the government more than $1million. TEC conducted well inclination surveys to correct errant depth-to-water measurements in previously installed wells changing interpreted groundwater flow approximately 180 degrees. TEC also evaluated sludge disposal areas and installed vent wells and soil vapor monitoring points to conduct treatability studies for contaminated subsurface soils at two oily waste disposal pits. Treatability studies evaluated bioventing versus soil vapor extraction. Bioventing proved to be more efficient and cost effective at the site. TEC conducted vadose zone and groundwater natural attenuation studies to determine plume stability and an incomplete leachate pathway rendering additional soil characterization of the nine USTs unnecessary; saving the US Air Force over $1 million. TEC completed a comprehensive RI Report recommending no further remedial action, which was accepted by the regulatory agencies. TEC has completed the no further action Proposed Plan and will have completed the no further action ROD by October 2009. TEC inc is redefining the traditional role of architectural and environmental engineering firms by helping our clients manage their total relationship with the natural and built envi- ronment. We offer an integrated suite of architectural, engineering, environmental, informa- tion technology, facility, and infrastructure management services that are designed to keep pace with our clients' expanding needs.  WW II fuel storage facility  700 ft monitoring wells  15 Mgal storage capacity  Drinking water resource impacted  Bioventing and Soil Vapor Extrac- tion  Vadose zone mod- eling  Groundwater natural attenuation modeling  RI/PP/ROD Volumetric Conceptual Site Model Hydrogeologic Cross Section indicating fuel migration pathways of concern Helping our clients manage their total relationship with the natural and built environment. Environmental Site Characterization and Regulatory Compliance Services US Air Force RI and Decision Documents, Hickam POL Facilities, Hawaii