San Jacinto River Waste Pits Superfund Site
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1 San Jacinto River Waste Pits Superfund Site
2 Channelview Highlands
3 Northern Waste Pits Before Cap
4 North Waste Pits After Cap Approximate Limit of Armored Cap Cap Construction Completed July 12, 2011
5 Old boat washed up on cap Feb 2015
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8 U.S. Army Corps of Engineers Computer models - flow & scour for storm/surge events. Existing cap design/construction. Short & long term cap reliability? [storms & barge strikes] Any migration through cap? Removal Best Management Practices. Cleanup levels. New full removal alternative.
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10 Warning Signs & Fish Advisories
11 Next: Corps of Engineers Report June 2015 Proposed Plan Dec 2015
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13 San Jacinto River Waste Pits Superfund Site For More Information U.S. EPA Gary Miller Remedial Project Manager or (toll-free) Valmichael Leos On-Scene Coordinator or (toll-free) Donn Walters Sr. Community Involvement Coordinator / Public Liaison or (toll-free) Texas Commission on Environmental Quality Satya Dwivedula Project Manager, Superfund Section Crystal Taylor Community Relations, Superfund Section Site Repository Highlands Public Library, Stratford Branch 509 Stratford Street, Highlands Texas San Jacinto Waste Pits Superfund Site on the Internet or
14 San Jacinto River Waste Pits Superfund Site Background Impoundments built in the mid-1960s for disposal of paper mill wastes. Partially submerged impoundments cover about 15.7 acres on the western bank of the San Jacinto River, north of Interstate 10 in Harris County, TX. Primarily contaminated with dioxins and furans. San Jacinto River Waste Pits added to the National Priorities List (Superfund) on March 19, 2008.
15 San Jacinto River Waste Pits Oct
16 San Jacinto River Waste Pits South Impoundment
17 Northern Waste Pits Before Cap
18 San Jacinto River Between 1851 and 2004, 25 hurricanes have made landfall along the north Texas Gulf Coast, seven of which were major (Category 3 to 5) storms. October 1994 flood had peak discharge of 360,000 cfs (greater than 100-years return period); the river stage height had a maximum value of 27 feet above sea level. 10 to 12-feet of river bed scour just south of the I-10 bridge. The flooding caused major soil erosion in the flood plain and river channel, including the creation of water channels outside the San Jacinto River bed. The flood waters scoured the riverbed and banks, destabilized roads and bridges (NTSB, 1996). River cut new channel through Banana Bend: 510-feet wide & 15-feet deep.
19 San Jacinto River Waste Pits Land Use Waste Pits
20 Surface Water Dioxin Analysis µg/l TEQ dioxin/furan Texas Surface Water Quality Standard: 7.8 x 10-8 µg/l
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22 San Jacinto River Waste Pits Superfund Site 205 Soil samples within preliminary site boundary. Waste Pits Southern Impoundment Surface soil - ng/kg TEQ DF Dioxin
23 50 ppt TEQ Dioxin/Furan
24 4.79 San Jacinto River Waste Pits Site , Surface & subsurface sediment samples within preliminary site boundary. 50,105 Waste Pits Southern Impoundment 3.87 Sediment - ng/kg TEQ DF Dioxin
25 San Jacinto River Waste Pits Dioxin/Furan (TEQ) Concentrations in Sediment Cores (ng/kg dw)
26 San Jacinto River Waste Pits Dioxin/Furan (TEQ) Concentrations in Surface Sediment (ng/kg dw) 26
27 Southern Impoundment Soil Samples 50, ft. 35, ft. Soil Dioxin Results 665 ng/kg TEQ DF < 665 ng/kg TEQ DF 27
28 Southern Impoundment Soil Samples 50, ft. 35, ft. Soil Dioxin Results 665 ng/kg TEQ DF < 665 ng/kg TEQ DF 28
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30 San Jacinto River Waste Pits Superfund Site Hardhead catfish sample locations within preliminary site boundary.
31 San Jacinto River Waste Pits Superfund Site Blue Crab sample locations within preliminary site boundary.
32 Spotted Seatrout Hazard Index by Site
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34 Northern Waste Pits Groundwater Monitoring Well Locations
35 Groundwater Cross-Section No Dioxin TEQ DF detected in groundwater pg/l Dioxin TEQ DF in waste material. 2.64J pg/l Dioxin TEQ DF in groundwater (MCL 30 pg/l).
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37 Southern Impoundment Groundwater Monitoring Well Locations Groundwater Monitoring Wells pg/l Dioxin TEQ DF (MCL 30 pg/l).
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39 Richard A. Beauchamp, M.D. TDSHS
40 Conceptual Site Model
41 Chemicals of Potential Concern
42 Human Health Risk Assessment North Area
43 Human Health Risk Assessment South Area
44 Hazard Quotients for Mammalian Receptors
45 Hazard Quotients for Avian Receptors
46 Hazard Quotients for Fish
47 San Jacinto River Waste Pits Draft Feasibility Study Preliminary Action Levels: 220 ng/kg (sediment outside of cap recreational visitor). 450 ng/kg (soil in Southern Impoundment construction worker). 1,300 ng/kg (soil/sediment within cap industrial/commercial worker).
48 San Jacinto River Waste Pits Texas Department of State Health Services: Conducting investigation of cancer & birth defects frequency in the area. Will compare results to expected frequencies. TDSHS performed door-to-door visits in Channelview to discuss health concerns with community in January 2014.
49 San Jacinto River Waste Pits Superfund Site TCRA Update Armor Cap Inspections Starting January 2012 Operations, Monitoring, and Maintenance (OMM) began on armor cap. Periodic Visual Inspections Topographic Surveys Manual Probing (if necessary) Chemical Analysis (Pore water sampling) Response plan for cap deficiencies (stock pile, response equipment) Visual Inspections & Surveys: Site security fencing and perimeter fencing Site signage Land based inspection of armor cap for erosion Water based inspection of waste materials erosion into river Review of topographic surveys (changes in elevation) of armor cap
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52 San Jacinto River Waste Pits Superfund Site TCRA Update Armor Cap Inspections
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54 Waste Pits Cap Porewater Sampling Locations
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56 San Jacinto River Waste Pits Northern Area Remediation Alternatives : Alt. 1N: TCRA Cap (No further action). Cost: $520,000. Alt. 2N: TCRA Cap, ICs & MNR. Cost: $1.3 million. Alt. 3N: Permanent Cap (cap enhancements), ICs, & MNR. Cost: $3.5 million; 2 months construction. Alt. 4N: Partial Solidification, Permanent Cap, ICs, & MNR. Cost: $14.2 million; 17 months construction. Alt. 5N: Partial Removal, Permanent Cap, ICs, & MNR. Cost: $29.1 million; 13 months construction. Alt. 5aN: Partial removal, Permanent Cap, ICs, & MNR. Cost: $68.9 million; 19 months construction. Alt. 6N: Full removal (greater than 220 ng/kg). Cost: $90.2 million; 16 months construction.
57 San Jacinto River Waste Pits Alternative 3N Cap Enhancements: 2 mo. Construction $3.5 MM
58 San Jacinto River Waste Pits Alternative 6N (200,100 CY) Full Removal: 16 mo. construction; $ 90.2 MM
59 San Jacinto River Waste Pits Southern Area Remediation Alternatives : Alt. 1S: No action. Cost: $143,000. Alt. 2S: Institutional Controls. Cost: $273,000. Alt. 3S: Enhanced Institutional Controls. Cost: $663,000; 1 month construction. Alt. 4S: Removal & Off-Site Disposal. Cost: $9.9 million; 7 months construction.
60 San Jacinto River Waste Pits Preliminary Remedial Action Areas South of I-10
61 TCRA Update Western Berm Erosion Berm erosion July Completion of repairs August 2012.
62 San Jacinto River Waste Pits Update on Armor Cap Fig. 1 Armor Cap Enhancement Work Plan - Armor cap D placement areas with improved slope construction
63 San Jacinto River Waste Pits Update on Armor Cap Constructing enhanced slope along the South Berm
64 Proportion of Congener Total (except OCDD) SJRWP Congener Fingerprint SJRWP 15 SE-08 SE-11 SJB1 SJC1 SJGB012 SE-09 SJGB010 SJGB009 SJVS001 SJGB011 SJA1 TEQ range = 10,080 to 32,400 ppt
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