Petroleum Program Update

transcript

BRACBRACPMO WESTPMO WEST

Petroleum Program UpdatePetroleum Program Update

Wilson DoctorWilson DoctorNavy Project ManagerNavy Project Manager

March 13, 2008March 13, 2008RAB MeetingRAB Meeting

Former NAS Moffett FieldFormer NAS Moffett FieldFormer NAS Moffett Field

Presentation OverviewPresentation OverviewPresentation Overview

• Background

• Petroleum projects– Buildings 29 & 55 pipelines– Additional Building 29 pipelines– Building 55 sump– Site 14 South

BackgroundBackgroundBackground

• 76 petroleum sites - closed to date

• 54 petroleum sites - in progress

Building 29 & 55 PipelinesBuilding 29 & 55 PipelinesBuilding 29 & 55 Pipelines

• Two inactive pipelines not previously investigated

• Building 29 pipelines– Aviation gasoline– Near Hangar 1– Inactive since 1950s– 900 ft, 2-inch and 3-inch diameter, metal

• Building 55 pipeline– Boiler fuel– Near Hangars 2 & 3– Inactive since at least 1994– 1400 ft, 3-inch diameter, metal

• Collected soil samples along pipelines every 20 feet

• Fieldwork completed

• Draft report

Additional Building 29 PipelinesAdditional Building 29 PipelinesAdditional Building 29 Pipelines

• Background– 3-inch pipeline and 8-inch pipeline

• 4,880 ft and 3,640 ft– Installed in 1930s and 1940s– Inactive since 1960s

• Sampled soil every 50 feet

• Fieldwork completed in November 2007

• Preparing draft report

Additional Building 29 PipelinesAdditional Building 29 PipelinesAdditional Building 29 Pipelines

Building 55 SumpBuilding 55 SumpBuilding 55 Sump

• Sump installed during the Building 55 pipeline investigation in 2005

• 10-foot deep PVC pipe

• Removed sump and collected soil samples February 2008

• Four quarters of groundwater monitoring

• Prepare draft report

Building 55 SumpBuilding 55 SumpBuilding 55 Sump

Site 14 South BackgroundSite 14 South BackgroundSite 14 South Background

• Fuel station

• Site covers about 1 acre

• Two 5,000-gal USTs (Tanks 19 & 20)– Removed in 1986– Contained gasoline and diesel

• Previous Investigations:

– Initial soil and groundwater (GW) assessment began 1987

– Periodic GW monitoring mid-1990s

– Site assessment activities 2003

• Previous investigations (continued):

– Chemical oxidation January 2005

– Quarterly groundwater monitoring 2005 to 2006• levels decreased initially• levels returned

• Previous investigation findings:– No free product observed at the site– Stable contaminant plume

Site 14 SouthSite 14 SouthSite 14 South

Current investigation:

• Final Work Plan February 2008– Additional site characterization– Install seven additional groundwater monitoring wells– Four quarters groundwater sampling

• New wells and nine existing wells– Evaluate data– Potential tank testing

Site 14 South Site 14 South Site 14 South

SummarySummarySummary

• Moffett petroleum program ongoing

• 76 petroleum sites - closed to date

• 54 petroleum sites - in progress

Questions?Questions?Questions?

Petroleum Program Update

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