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Keith Middle Keith Middle School/New Bedford School/New Bedford High SchoolHigh School
Public Information Plan Public Information Plan MeetingMeeting
May 3, 2007May 3, 2007
THE SCIENCE
COLLABORATIVE
NORTH SHORE
AgendaAgenda
Vent Remediation Status - NBHSVent Remediation Status - NBHS– – D. Sullivan, LSP, CHMMD. Sullivan, LSP, CHMM
NBHS/Area Invest./Remediation StatusNBHS/Area Invest./Remediation Status– D. Sullivan, LSP, CHMMD. Sullivan, LSP, CHMM
TRC Air Monitoring at KMS with TRC Air Monitoring at KMS with PerspectivePerspective– G. Hunt, QEPG. Hunt, QEP
Agenda (cont.)Agenda (cont.)
Slope Failure at KMSSlope Failure at KMS– G. Mischel, PEG. Mischel, PE
Exposure to PCBs and Home Exposure to PCBs and Home GardeningGardening– D. Vorhees, Sc.D.D. Vorhees, Sc.D.
Vent Remediation StatusVent Remediation Status
Tour of facility – October 2006Tour of facility – October 2006
Draft Specs - October 2006Draft Specs - October 2006
Finalized – March 2007Finalized – March 2007
Advertised - March 29, 2007Advertised - March 29, 2007
Bid Walk – April 17, 2007Bid Walk – April 17, 2007
Estimated Schedule - Estimated Schedule - VentsVents Bid Walk – April 17, 2007Bid Walk – April 17, 2007
Bids Due – May 1, 2007Bids Due – May 1, 2007 (To be rescheduled)(To be rescheduled)
Project Award – May 8, Project Award – May 8, 2007 (To be rescheduled)2007 (To be rescheduled)
Project Start – June 2007Project Start – June 2007
NBHS/Area Investigation NBHS/Area Investigation and Remediation Statusand Remediation Status Finalize task order Finalize task order
contract.contract.
Finalize Finalize investigation investigation proposal.proposal.
Obtain Obtain subcontractor subcontractor quotes.quotes.
NBHS/Area Investigation NBHS/Area Investigation ComponentsComponents Over 250 soil borings Over 250 soil borings
(NBHS/Area)(NBHS/Area)– Includes subslab Includes subslab
borings in NBHSborings in NBHS
11 monitoring wells11 monitoring wells– Includes 2 to 3 subslab Includes 2 to 3 subslab
wells in NBHSwells in NBHS
10 surface soil 10 surface soil samples near school samples near school buildingbuilding– Potential deteriorated Potential deteriorated
caulking and sealants.caulking and sealants.
BETA/NBHS BETA/NBHS Sampling PlanSampling Plan
NBHS/Area Investigation – NBHS/Area Investigation – Anticipated Remedial Anticipated Remedial ElementsElements Material removalMaterial removal
Clean soil coverClean soil cover
Excavation and consolidation with Excavation and consolidation with clean coverclean cover
Activity and use limitations (AULs)Activity and use limitations (AULs)
NBHS/Area Time LineNBHS/Area Time Line
Drilling/sampling – May/JuneDrilling/sampling – May/June
Lab analysis – May/June/JulyLab analysis – May/June/July
Remedial analysis/design - OngoingRemedial analysis/design - Ongoing
Public Bidding – AugustPublic Bidding – August
Initiate Remedy – SeptemberInitiate Remedy – September
Gary Hunt, QEPGary Hunt, QEP
BS Chemistry 1974 VillanovaBS Chemistry 1974 Villanova
MS Environmental Sciences 1977 RutgersMS Environmental Sciences 1977 Rutgers
1975-1976 PCBs NJ Fish Population1975-1976 PCBs NJ Fish Population
1976-1977 Research Assistant-WHOI- PCBs New Bedford 1976-1977 Research Assistant-WHOI- PCBs New Bedford MusselsMussels
1982-1984 GCA Technology-Project Mgr EPA OSW PCBs in 1982-1984 GCA Technology-Project Mgr EPA OSW PCBs in New Bedford (ambient air, Acushnet R sediments, POTW New Bedford (ambient air, Acushnet R sediments, POTW and Sullivan’s Ledge)and Sullivan’s Ledge)
Expert Witness for EPA/DOJ US vs Cornell and AerovoxExpert Witness for EPA/DOJ US vs Cornell and Aerovox
30 Years Professional Experience (GCA/ENSR/TRC)30 Years Professional Experience (GCA/ENSR/TRC)
Hudson River PCBs Remediation-2005-PresentHudson River PCBs Remediation-2005-Present
New Bedford HS/MS- PCBs Schools 2006-PresentNew Bedford HS/MS- PCBs Schools 2006-Present
> 100 Publications/Presentations POPs/Toxics in > 100 Publications/Presentations POPs/Toxics in EnvironmentEnvironment
PCB Measurements PCB Measurements Summary of FindingsSummary of Findings
PCBs Keith MS Indoor Air Equivalent or < PCBs Keith MS Indoor Air Equivalent or < Background AirBackground Air
PCBs Well Below EPA Action Level 0.050 PCBs Well Below EPA Action Level 0.050 ug/m3 ug/m3
PCBs Present in Vent Samples PeriodicallyPCBs Present in Vent Samples Periodically
PCBs in Vents Equivalent to BackgroundPCBs in Vents Equivalent to Background
= Indoor Air Sampling Point
N
Hathaway Boulevard
Building A
Building BGymnasium
Cafeteria Kitchen
B-3 Aud
Faculty Dining
C-3 Faculty Dining
Courtyard
A-3 Hallway
Building CBackground
KMS Indoor Air Sampling KMS Indoor Air Sampling LocationsLocations
March/April 2007 KMS Indoor Air Total PCB Results
0.0015
0.000640.00037
0.0013
0.00031
0.0017
0
0.0005
0.001
0.0015
0.002
0.0025
0.003
Hallway A Auditorium Faculty Dining
ug
/m3
3/31/2007
4/18/2007
EPA Action Level = 0.05 ug/m3
Historical KMS Indoor AirTotal PCB Results (mean)
0.0013
0.0005 0.0005
0.0016
0.0000
0.0005
0.0010
0.0015
0.0020
0.0025
Hallway A Auditorium FacultyDining
Background(Flag Pole)
ug
/m3
MEAN
EPA Action Level = 0.05 ug/m3
KMS Indoor Air PCB ResultsCompared to EPA Action Level
0
0.01
0.02
0.03
0.04
0.05
0.06
Hallway A Auditorium Faculty Dining Background(Flag Pole)
ug
/m3
7/20/2006
8/5/2006
8/19/2006
9/15/2006
10/6/2007
12/1/2006
12/29/2006
1/20/2007
2/21/2007
3/31/2007
4/18/2007
EPA Action Level
= Vent Riser
= Passive Venting and Collection System
Foundation Vent Stack Foundation Vent Stack Sampling LocationsSampling LocationsN
Hathaway Boulevard
Building A Building B
Gymnasium
Cafeteria Kitchen
AuditoriumFaculty Dining
VS-15
VS-1
VS-4
VS-3
VS-2
VS-16
VS-6
VS-7
VS-5
VS-10
VS-8
VS-9
VS-14
VS-11
VS-13
VS-12Background
Historical Total PCB Results From Vent Stacks
0.02
0.0007
0.017 0.016
0
0.01
0.02
0.03
0.04
0.05
0.06
VS-4 VS-11 VS-13 Background(Flag Pole)
Vent Stack ID
ug
/m3
9/15/2006
12/1/2006
3/31/2007
Mean
EPA Action Level
VOC Measurements VOC Measurements Summary of FindingsSummary of Findings
VOCs Present in Vents ConsistentlyVOCs Present in Vents Consistently
VOCs in Vents Decreasing in VOCs in Vents Decreasing in Concentration Over TimeConcentration Over Time
VOCs Keith MS Indoor Air at VOCs Keith MS Indoor Air at Background Concentrations or Background Concentrations or Attributable to Maintenance Attributable to Maintenance ActivitiesActivities
Historical Results Building A Hallway
0
10
20
30
40
50
60Jul-06
Aug-0
6
Sep-0
6
Oct-
06
Nov-0
6
Dec-0
6
Jan-0
7
Feb-0
7
Mar-
07
ug
/m3
2-butanone
THF
toluene
m/p-xylene
Historical Results Auditorium (B)
0
20
40
60
80
100
120
140
160
180
200Ju
l-06
Aug
-06
Sep
-06
Oct
-06
Nov
-06
Dec
-06
Jan-
07
Feb
-07
Mar
-07
ug
/m3
2-butanone
THF
toluene
m/p-xylene
Historical Results Faculty Dining (C)
0
20
40
60
80
100
120
140Ju
l-06
Aug
-06
Sep
-06
Oct
-06
Nov
-06
Dec
-06
Jan-
07
Feb
-07
Mar
-07
ug
/m3
2-butanone
THF
toluene
m/p-xylene
Historical Vent Stack (VS-1) Results
0
50
100
150
200
250
300
350
Jul-0
6
Aug
-06
Sep
-06
Oct
-06
Nov
-06
Dec
-06
Jan-
07
Feb
-07
Mar
-07
ug
/m3
2-butanone
THF
toluene
xlyene
Historical Vent Stack (VS-4) Results
0
50
100
150
200
250Ju
l-06
Aug
-06
Sep
-06
Oct
-06
Nov
-06
Dec
-06
Jan-
07
Feb
-07
Mar
-07
ug
/m3
2-butanone
THF
toluene
xlyene
Slope Failure StatusSlope Failure Status
Slope failed April 5, Slope failed April 5, 2007.2007.
Temporary repair Temporary repair completed.completed.
Design change for final Design change for final repair being reviewed.repair being reviewed.
No impacted soil No impacted soil exposed.exposed.
Greg Mischel, P.E.Greg Mischel, P.E.
B.S. Geology 1986, M.S. Geotechnical B.S. Geology 1986, M.S. Geotechnical Engineering 1998Engineering 1998
20 years in business, 10 as engineer 20 years in business, 10 as engineer with TRCwith TRC
Seven Superfund LandfillsSeven Superfund Landfills
Designed four cleanups involving capsDesigned four cleanups involving caps
What HappenedWhat Happened
Shallow slump in Shallow slump in topsoil.topsoil.
Clean granular fill Clean granular fill exposed.exposed.
No impacted soil No impacted soil exposed.exposed.
Excess water likely Excess water likely cause.cause.
Temporary RepairTemporary Repair
Divert storm Divert storm water flow and water flow and prevent erosion.prevent erosion.
Hay bales and silt Hay bales and silt fence.fence.
Geotextile fabric.Geotextile fabric.
Proposed Final RepairProposed Final Repair
Remove excess topsoil and line with Remove excess topsoil and line with geotextile.geotextile.
Replace slumped topsoil with riprap.Replace slumped topsoil with riprap.
Install seed and ECB to stabilize bare Install seed and ECB to stabilize bare soil.soil.
Subject to EPA approval.Subject to EPA approval.
Proposed Repair Proposed Repair DesignDesign
Cap InspectionCap Inspection
Completed 4/17/07.Completed 4/17/07.
Building floor in good shape.Building floor in good shape.
Single slope failure 4/5/07.Single slope failure 4/5/07.
Minor erosion on south slope.Minor erosion on south slope.
Cap inspection report being finalized.Cap inspection report being finalized.
Exposure to PCBs and Exposure to PCBs and Home GardensHome Gardens
Donna J. Vorhees, Sc.D.Donna J. Vorhees, Sc.D.
Question: Is it safe for people to eat fruits and vegetables from home gardens in the New Bedford Area?
Answer: Generally speaking, yes
Basis for this answer: (1) Two studies in which tomatoes, lettuce, potatoes,
and carrots were sampled from New Bedford area farms and gardens and analyzed for PCBs
(2) Scientific literature describing how PCBs move through the environment
Caveat: Answer depends on how closely the two studies and literature reflect actual gardens and vegetable consumption patterns in the New Bedford area
Conclusions from two New Conclusions from two New Bedford area vegetable Bedford area vegetable studiesstudies
EPA studyEPA study – Human health risk from PCBs in tomatoes “well Human health risk from PCBs in tomatoes “well
within the EPA acceptable range.”within the EPA acceptable range.” Harvard studyHarvard study
– Tomato concentrations were lower than those Tomato concentrations were lower than those measured in the EPA studymeasured in the EPA study
– An adult would have to eat about 49 pounds of An adult would have to eat about 49 pounds of tomatoes with the maximum PCB tomatoes with the maximum PCB concentration detected in this study each year concentration detected in this study each year for 30 years to increase the risk of getting for 30 years to increase the risk of getting cancer by 1 in one millioncancer by 1 in one million
People who eat
fruits and vegetable
s from home
gardens
How do PCBs get into garden produce?
Below ground crops
Unprotected above-ground crops
Protected above-ground crops
Soil with PCBs
Air
Distant PCB Sources
How can you reduce exposure How can you reduce exposure to PCBs in food from your to PCBs in food from your garden?garden?
Wash off soil particles with water or Wash off soil particles with water or very mild soap solutionvery mild soap solution
Peel vegetablesPeel vegetables
Keith Middle School/Keith Middle School/
New Bedford High SchoolNew Bedford High School
May 3, 2007 Public May 3, 2007 Public Information Plan (PIP) MeetingInformation Plan (PIP) Meeting
Thank you for coming!Thank you for coming!
Questions are welcome!Questions are welcome!