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Flooding of Union Creek onto Travis AFB |
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Pollution plumes There are historic plumes tha |
ISSUE MINOR‐9 |
Union Creek on the south side of the airfield sometimes floods due to blockage at outfall where the creek leaves Travis AFB . |
ISSUE MINOR‐10 |
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Compatibility Assessment
The main surface drainage for Travis AFB is Union Creek , a stream that flows in two branches to the southwest . Storm drains on‐base generally flow south in underground pipes and concrete vaults with outfalls to Union Creek near the southern boundary of the Base . Six outfall locations drain storm water from Travis AFB .
One of the outfalls just outside of the Base on private property is not adequate for handling storm water . The outfall tends to flood and backs up onto base during heavy rain . Travis AFB has an easement to clear vegetation at its expense along the length of Union Creek on private property located southwest of the Base to ensure the “ free flow of waters of Union Creek ” through the private property . The work described in the easement was proposed in Union Creek Restoration Work Plan 2015 and was planned to be completed by September 2015 . However , annual funding was not secured to maintain the creek and outflows .
Findings
• Travis AFB has an easement to clear vegetation at its expense along the length of Union Creek on private property located southwest of the Base to ensure the “ free flow of waters of Union Creek ” through the private property .
Compatibility Assessment
The DOD established an Installation Restoration Environmental Restoration Program , in 1975 to funding for the investigation and remediation o caused by historical disposal activities at militar Environmental Restoration Program investigate former disposal and test areas , some of which w of chemicals was regulated or even fully unders follow current environmental guidelines for the of hazardous materials and waste . In 1989 , Trav National Priorities List by the EPA and began inv from past activities , establishing 19 restoration instances of groundwater contamination that m southern Base boundary and one on the north . the off‐base groundwater is Trichloroethene ( TC at Travis until 1980 . The following describes th
• Site FT005 : An area used for fire training 1962 through 1987 . During this period , w were burned on open ground . Historical groundwater contamination with chlorin compounds ( VOCs ). 41.6 acres of the plu
TSS Background Report