Chautauqua BeachChautauqua BeachCulvert Replacement Project #3Culvert Replacement Project #3--16451645
Project Date: July 2007Project Date: July 2007
Success or Failure?Success or Failure?
Department of TransportationRoad Services DivisionRoad Maintenance Section
Potential Road FailurePotential Road FailureChautauqua Beach Road SWChautauqua Beach Road SW
Chautauqua Beach Vicinity MapChautauqua Beach Vicinity Map
Puget Sound
Tramp Harbor
Culvert Replacement Project Site
Ellisp
ort C
ree
k
Vashon Island
Road Maintenance Road Maintenance Environmental UnitEnvironmental Unit
Culvert OutletsCulvert Outlets
Project SiteProject SiteLeft: Ellisport Creek Culvert Inlets
Bottom: Ellisport Creek Upstream
Road Maintenance Design PlansRoad Maintenance Design Plans
Chautauqua BeachChautauqua Beach
HistoryHistory
The property was developed as a lumber The property was developed as a lumber mill, millpond, and greenhouses for mill, millpond, and greenhouses for growing vegetables.growing vegetables.
Harrington – Beall Greenhouses, 1928.
The fuel was stored onThe fuel was stored on--site in two large site in two large above ground storage tanks and was also above ground storage tanks and was also used to fuel greenhouses on the island.used to fuel greenhouses on the island.
The operations used heavy Bunker C fuel The operations used heavy Bunker C fuel oil imported by barge.oil imported by barge.
Past Site Past Site InvestigationsInvestigations
King County Department of Natural King County Department of Natural Resources and Parks conducted a site Resources and Parks conducted a site investigation in 1998.investigation in 1998.
AGI Technologies conducted a limited Phase AGI Technologies conducted a limited Phase II site assessment in 1999.II site assessment in 1999.
1999 AGI Investigation Sample Locations1999 AGI Investigation Sample Locations
Enclosed Conc. Structure
Oil Tank Foundation
S4
S3
S5
S2
S6
S7 / W1S8S9
S10
S11
S13S14
S15
S16S17
S12
S1
= Soil Sample Location (S#)
# = Test Pit Location
= Groundwater Sample Location (W1)
AGI Sampling Event
July 13, 1999
1999 AGI Laboratory Results1999 AGI Laboratory Results
S11
S8S7 / W1
S4S6
S3
26
3
4
= Test Pits= Hand Auger Samples
Sample locations with detectable TPH concentrations
AGI Investigation FindingsAGI Investigation Findings
Contamination most likely a result from tank leakage of Bunker C fuel oil.
Free product is centered around the former storage tanks in an area approximately 220 feet long by up to 100 feet wide.
Free product area is located west of Ellisport Creek and north of Chautauqua Beach Road SW.
No evidence of TPH contamination in Ellisport Creek.
2006 CDM Investigation2006 CDM Investigation
FWS-3
FWS-1 / FWS-2
FWS-4
FWS-5
MS-1MS-2
MS-3
Sampling Event July 5, 2006
CDM CDM StudyStudy
Road Maintenance Road Maintenance Environmental SamplingEnvironmental Sampling
Goal: Determine the extent of potential soil & Goal: Determine the extent of potential soil & water contamination within the project footprintwater contamination within the project footprint
Road Maintenance Site InvestigationRoad Maintenance Site Investigation
Sampling Event
February 17, 2004
= Hand Auger Sample Location
= Well Boring Sample Location
Results showed minimal contaminant levels in the soils and no detectable concentrations in ground-water within the project footprint.
CHA09
CHA08CHA07
CHA05
CHA02
Sample sites with detectable TPH concentrations
Chautauqua Beach Project 2007Chautauqua Beach Project 2007
SuRPRISESuRPRISE & Horror& Horrorat Chautauqua Beachat Chautauqua Beach
SuspenseSuspense at Chautauqua Beachat Chautauqua BeachProject becomesProject becomes
Chautauqua Beach Project 2007Chautauqua Beach Project 2007
Test Pits with Oil Contamination Present
Pumping contaminated water to Baker Tanks
Chautauqua Beach Project 2007Chautauqua Beach Project 2007
Findings of petroleum contamination within the project footprint drives Managements' decision to cancel the project.
Chautauqua Beach Chautauqua Beach TreatTreatSpill Response Training & Experience Spill Response Training & Experience of Road Maintenance personnelof Road Maintenance personnel……And quick action of Environmental staff And quick action of Environmental staff and Road Maintenance crews and Road Maintenance crews prevented petroleum contamination prevented petroleum contamination from reaching Puget Sound.from reaching Puget Sound.
Lessons LearnedLessons LearnedThorough planning, site Thorough planning, site assessments and scientific assessments and scientific analysis works analysis works mostmost of the timeof the time
Plan for worst case scenarios; Plan for worst case scenarios; there is always the unknownthere is always the unknown
Subsurface investigations are Subsurface investigations are by design limited in their ability by design limited in their ability to find all sources of to find all sources of contamination within the extent contamination within the extent of the project areaof the project area
QuestionsQuestions
Road Services Division, Road Maintenance Section [email protected]
Questions and Comments to: Doug Navetski, Environmental Scientist III
Thank You!
