Histogram of Scow Removable Load Thickness Figure 5-2 April 2010 - - PowerPoint PPT Presentation

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Histogram of Scow Removable Load Thickness Figure 5-2 April 2010 - - PowerPoint PPT Presentation

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60 50 40 ws Number of Sco 30 20 10 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.7 Estimated Removable Load

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SLIDE 1
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SLIDE 2

60 50 40 ws 30 Number of Sco 20 10

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.7

Estimated Removable Load Thickness in Feet

April 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure 5-2

Histogram of Scow Removable Load Thickness

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SLIDE 3

Average Daily Bucket Fill Rate Sediment Losses Indicated when Bucket Fill Rates Approach or Exceed 100%

Average Daily Bucket Fill Rate CU 7 12 14 16 Average Daily Bucket Fill Rate CU-7

(CU‐7)

8 10 12 equency 4 6 Fre 20 40 60 80 100 120 140 160 180 2 Average Percent Full

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SLIDE 4

CU-1

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3 DP4 DP5 181%

110% 120% 130% 140%

1 cy Bucket Size

70% 80% 90% 100%

1 cy 2 cy 5 cy

30% 40% 50% 60% 0% 10% 20% 30% 6/1 6/8 6/15 6/22 6/29 7/6 7/13 7/20 7/27 8/3 8/10 8/17 8/24 8/31 9/7 9/14 9/21 9/28 10/5 10/12 10/19 10/26

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3a

Average Daily Bucket Filling Efficiency

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SLIDE 5

Bucket Filling

CU-2

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3 DP4

100% 110% 120% 130%

1 cy Bucket Size

70% 80% 90% 100%

2 cy 5 cy

40% 50% 60% 0% 10% 20% 30% 0% 6/1 6/8 6/15 6/22 6/29 7/6 7/13 7/20 7/27 8/3 8/10 8/17 8/24 8/31 9/7 9/14 9/21 9/28 10/5 10/12

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3b

Average Daily Bucket Filling Efficiency

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SLIDE 6

CU-3

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3

110% 120% 130% 140%

1 cy 2 Bucket Size

DP2 3

70% 80% 90% 100%

2 cy 5 cy

40% 50% 60% 70% 0% 10% 20% 30% 7/6 7/13 7/20 7/27 8/3 8/10 8/17 8/24 8/31 9/7 9/14 9/21 9/28 10/5

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3c

Average Daily Bucket Filling Efficiency

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SLIDE 7

CU-4

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3

Bucket Size

110% 120% 130% 140%

1 cy 2 cy 5 cy

70% 80% 90% 100% 40% 50% 60% 70% 0% 10% 20% 30% 0% 7/16 7/23 7/30 8/6 8/13 8/20 8/27 9/3 9/10 9/17 9/24 10/1 10/8 10/15 10/22

Note:DP=Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3d

Average Daily Bucket Filling Efficiency

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SLIDE 8

CU-5

150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3

110% 120% 130% 140% 70% 80% 90% 100% % 40% 50% 60% 70%

1 cy Bucket Size

0% 10% 20% 30%

2 cy 5 cy

0% 6/8 6/15 6/22 6/29 7/6 7/13 7/20 7/27 8/3 8/10 8/17 8/24 8/31 9/7 9/14

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3e

Average Daily Bucket Filling Efficiency

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SLIDE 9

B k t Filli

CU-6

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3

1 cy Bucket Size

100% 110% 120% 130%

y 2 cy 5 cy

70% 80% 90% 100% 30% 40% 50% 60% 0% 10% 20% 30% 6/11 6/18 6/25 7/2 7/9 7/16 7/23 7/30 8/6 8/13 8/20 8/27 9/3 9/10 9/17 9/24

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Average Daily Bucket Filling Efficiency

Figure III-3-3f

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SLIDE 10

CU-7

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3 DP4 172%

110% 120% 130% 140% 70% 80% 90% 100% 40% 50% 60% 70%

1 cy Bucket Size

0% 10% 20% 30%

1 cy 2 cy 5 cy

0% 7/7 7/14 7/21 7/28 8/4 8/11 8/18 8/25 9/1 9/8 9/15 9/22 9/29 10/6 10/13

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3g

Average Daily Bucket Filling Efficiency

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SLIDE 11

Bucket Filling

CU-8

150%

Bucket Filling Efficiency (%)

CU 8

DP1 DP2 DP3

1 cy

DP4

Bucket Size

110% 120% 130% 140%

1 cy 2 cy 5 cy

70% 80% 90% 100% 40% 50% 60% 70% 0% 10% 20% 30% 0% 7/19 7/26 8/2 8/9 8/16 8/23 8/30 9/6 9/13 9/20 9/27 10/4 10/11 10/18 10/25

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3h

Average Daily Bucket Filling Efficiency

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SLIDE 12

CU-17

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3

Bucket Size

110% 120% 130% 140%

1 cy 2 cy 5 cy Bucket Size

70% 80% 90% 100%

5 cy

40% 50% 60% 70% 0% 10% 20% 30% 0% 6/26 7/3 7/10 7/17 7/24 7/31 8/7 8/14 8/21 8/28 9/4 9/11

Note : DP = Dredge Pass

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3i

Average Daily Bucket Filling Efficiency

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SLIDE 13

Bucket Filling

CU-18

140% 150%

Bucket Filling Efficiency (%)

DP1 DP2 DP3 182% 155%

Bucket Size

100% 110% 120% 130%

1 cy 2 cy (in SP) 5 cy (out SP)

70% 80% 90% 100% 30% 40% 50% 60% 0% 10% 20% 30% 6 3 6 3 7 3 7 4 1 8 5 2 7/16 7/23 7/30 8/6 8/13 8/20 8/27 9/3 9/10 9/17 9/24 10/ 10/ 10/1 10/22

Notes : DP = Dredge Pass SP = Sheet Pile

March 2010

EPA Phase 1 Evaluation Report - Hudson River PCBs Site

Figure III-3-3j

Average Daily Bucket Filling Efficiency

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SLIDE 14

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 15

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 16

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 17

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 18

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 19

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 20

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 21

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 22

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 23

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 24

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 25

Figure 1-1 April 2010

EPA Phase 1 Evaluation Report – Hudson River PCBs Site

Bucket Bite Locations and Depths below 2005 Bathymetric Surface

  • 9

18 4.5 Feet

Date

7/20/2009 7/21/2009 7/22/2009 7/23/2009 7/24/2009 7/25/2009 7/28/2009 7/29/2009 7/30/2009 7/31/2009 8/3/2009 8/5/2009 Dredging Area 1 Area of Interest

Portion of CU-7

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SLIDE 26

Variable Name Source Description BCntTotal GE Bucket_Analysis_Table_20091202.xlsx Bucket Count BargeDist vessel_tracking_20100107.txt Total distance traveled by barges per day BargeV_D Derived Daily average of the product of distance times velocity for barges BargeVel vessel_tracking_20100107.txt Daily Average velocity of barges DrdgDist vessel_tracking_20100107.txt Total distance traveled by drdges per day DrdgV_D Derived Daily average of the product of distance times velocity for dredges DrdgVel vessel_tracking_20100107.txt Average velocity of dredges Load_Bfill Tables 2.6‐5 through 14 of Phase 1 Data Compilation Report for open CU times, USGS for flow Product of number of CUs being backfilled times the flow FlowFE USGS Flow at the Ft. Edward flow gage Temp_C Temperature Load_CU_Area Form 1 Residual Cores Data Export , Tables 2.6‐ 5 through 14 of Phase 1 Data Compilation Report for open CU times, USGS for flow Product of open CU area times flow times average concentration in the CU MassRemTotal3 TPCB concentration at far‐field &USGS flow Total Mass Removed per day SbDist vessel_tracking_20100107.txt Total distance traveled by small boats per day SbV_D vessel_tracking_20100107.txt Daily average of the product of distance times velocity for small boats SbVel vessel_tracking_20100107.txt Average velocity of small boats ScowDist vessel_tracking_20100107.txt Total distance traveled by scows per day ScowV_D vessel_tracking_20100107.txt Daily average of the product of distance times velocity for scows ScowVel vessel_tracking_20100107.txt Average velocity of scows TotalBfill Tables 2.6‐5 through 14 of Phase 1 Data Compilation Report Number of CUs being backfilled per day VolRemTotal GE Weekly Report Total volume of sediment removed per day BoatDist vessel_tracking_20100107.txt Total distance traveled by all boats per day Table 8a. Variable Descriptions. Variables were summarized for each day on eacn CU as well as cumulatively across all CUs.

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SLIDE 27

Variable Name Source Description BoatVel vessel_tracking_20100107.txt Daily average of the product of distance times velocity for all boats BoatV_D vessel_tracking_20100107.txt Average velocity of all boats LoadBoats vessel_tracking_20100107.txt Product of distance traveled by all boats and flow TotalEfficiency Garvey, GE Bucket_Analysis_Table_20091202.xlsx? Please define ME GE Bucket_Analysis_Table_20091202.xlsx Procuct of total mass removed and average daily efficiency ScowsOnQueue Derived

Average number of scows on queue per day. When scows are

queued, dredging contractors slow down and potentially nibble sediment, increasing the resuspension losses per unit sediment removed.

ME Derived

(Volume removed)/(bucket count x bucket volume) x (mass

removed). Index to spillage associated with resuspension due to failure to fully close buckets in efforts to increase removal

  • rates. Failure to close buckets was signaled in the database by

apparently over-full buckets due to volume associated with multiple actual cycles being associated with a single apparent cycle in the data.

TugMIlePCBs Derived

CU and non-CU specific concentration and water depth-

weighted tug distance. Previous analyses looked at total vessel distance per day, but these totals were correlated with total mass and volume removed. Separate CU-specific and concentration- and depth-specific information was needed in

  • rder to disentangle vessel traffic from apparent effects of

mass and volume removal

TugMilePCBs_Bfill Derived

(Product of number of units being backfilled) x (metric

described in 4 - tug disturbance).

CuMass Derived

CU-specific mass of PCBs removed. By separating mass removed per CU specifically, it was possible to separate general removal effects from other factors.

LoadBoats Derived Product of distance traveled by all boats and flow tPCB_CU_AREA Derived Total surface PCB concentration in open CUs times area of the CU. Table 8b. Variable Descriptions. Variables were summarized for each day on eacn CU as well as cumulatively across all CUs.